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c694d8589f1023f6e565d83b1c636da6a9088bc0
gem5/src/arch/arm/isa/formats/aarch64.isa
Sascha Bischoff c694d8589f arch-arm, cpu: Implement instructions added by FEAT_SME 
We add the full set of instructions added by Arm's FEAT_SME, with the
exception of BMOPA/BMOPS which are BrainFloat16-based outer product
instructions. These have been omitted due to the lack of support for
BF16 in fplib - the software FP library used for the Arm ISA
implementation.

The SMEv1 specification can be found at the following location:
https://developer.arm.com/documentation/ddi0616/latest

Jira Issue: https://gem5.atlassian.net/browse/GEM5-1289

Change-Id: I4882ab452bfc48770419860f89f1f60c7af8aceb
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/64339
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com>
2023-01-17 10:09:56 +00:00

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// Copyright (c) 2011-2022 Arm Limited
// All rights reserved
//
// The license below extends only to copyright in the software and shall
// not be construed as granting a license to any other intellectual
// property including but not limited to intellectual property relating
// to a hardware implementation of the functionality of the software
// licensed hereunder. You may use the software subject to the license
// terms below provided that you ensure that this notice is replicated
// unmodified and in its entirety in all distributions of the software,
// modified or unmodified, in source code or in binary form.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met: redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer;
// redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution;
// neither the name of the copyright holders nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
output header {{
namespace Aarch64
{
StaticInstPtr decodeDataProcImm(ExtMachInst machInst);
StaticInstPtr decodeBranchExcSys(const Decoder &dec, ExtMachInst machInst);
StaticInstPtr decodeLoadsStores(ExtMachInst machInst);
StaticInstPtr decodeDataProcReg(ExtMachInst machInst);
template <typename DecoderFeatures>
StaticInstPtr decodeFpAdvSIMD(ExtMachInst machInst);
StaticInstPtr decodeFp(ExtMachInst machInst);
template <typename DecoderFeatures>
StaticInstPtr decodeAdvSIMD(ExtMachInst machInst);
StaticInstPtr decodeAdvSIMDScalar(ExtMachInst machInst);
StaticInstPtr decodeSveInt(ExtMachInst machInst);
StaticInstPtr decodeSveFp(ExtMachInst machInst);
StaticInstPtr decodeSveMem(ExtMachInst machInst);
StaticInstPtr decodeGem5Ops(ExtMachInst machInst);
}
}};
output decoder {{
namespace Aarch64
{
StaticInstPtr
decodeDataProcImm(ExtMachInst machInst)
{
RegIndex rd = (RegIndex)(uint32_t)bits(machInst, 4, 0);
RegIndex rdsp = makeSP(rd);
RegIndex rdzr = makeZero(rd);
RegIndex rn = (RegIndex)(uint32_t)bits(machInst, 9, 5);
RegIndex rnsp = makeSP(rn);
uint8_t opc = bits(machInst, 30, 29);
bool sf = bits(machInst, 31);
bool n = bits(machInst, 22);
uint8_t immr = bits(machInst, 21, 16);
uint8_t imms = bits(machInst, 15, 10);
switch (bits(machInst, 25, 23)) {
case 0x0:
case 0x1:
{
uint64_t immlo = bits(machInst, 30, 29);
uint64_t immhi = bits(machInst, 23, 5);
uint64_t imm = (immlo << 0) | (immhi << 2);
if (bits(machInst, 31) == 0)
return new AdrXImm(machInst, rdzr, int_reg::Zero,
sext<21>(imm));
else
return new AdrpXImm(machInst, rdzr, int_reg::Zero,
sext<33>(imm << 12));
}
case 0x2:
case 0x3:
{
uint32_t imm12 = bits(machInst, 21, 10);
uint8_t shift = bits(machInst, 23, 22);
uint32_t imm;
if (shift == 0x0)
imm = imm12 << 0;
else if (shift == 0x1)
imm = imm12 << 12;
else
return new Unknown64(machInst);
switch (opc) {
case 0x0:
return new AddXImm(machInst, rdsp, rnsp, imm);
case 0x1:
return new AddXImmCc(machInst, rdzr, rnsp, imm);
case 0x2:
return new SubXImm(machInst, rdsp, rnsp, imm);
case 0x3:
return new SubXImmCc(machInst, rdzr, rnsp, imm);
default:
GEM5_UNREACHABLE;
}
}
case 0x4:
{
if (!sf && n)
return new Unknown64(machInst);
// len = MSB(n:NOT(imms)), len < 1 is undefined.
uint8_t len = 0;
if (n) {
len = 6;
} else if (imms == 0x3f || imms == 0x3e) {
return new Unknown64(machInst);
} else {
len = findMsbSet(imms ^ 0x3f);
}
// Generate r, s, and size.
uint64_t r = bits(immr, len - 1, 0);
uint64_t s = bits(imms, len - 1, 0);
uint8_t size = 1 << len;
if (s == size - 1)
return new Unknown64(machInst);
// Generate the pattern with s 1s, rotated by r, with size bits.
uint64_t pattern = mask(s + 1);
if (r) {
pattern = (pattern >> r) | (pattern << (size - r));
pattern &= mask(size);
}
uint8_t width = sf ? 64 : 32;
// Replicate that to fill up the immediate.
for (unsigned i = 1; i < (width / size); i *= 2)
pattern |= (pattern << (i * size));
uint64_t imm = pattern;
switch (opc) {
case 0x0:
return new AndXImm(machInst, rdsp, rn, imm);
case 0x1:
return new OrrXImm(machInst, rdsp, rn, imm);
case 0x2:
return new EorXImm(machInst, rdsp, rn, imm);
case 0x3:
return new AndXImmCc(machInst, rdzr, rn, imm);
default:
GEM5_UNREACHABLE;
}
}
case 0x5:
{
RegIndex rd = (RegIndex)(uint32_t)bits(machInst, 4, 0);
RegIndex rdzr = makeZero(rd);
uint32_t imm16 = bits(machInst, 20, 5);
uint32_t hw = bits(machInst, 22, 21);
switch (opc) {
case 0x0:
return new Movn(machInst, rdzr, imm16, hw * 16);
case 0x1:
return new Unknown64(machInst);
case 0x2:
return new Movz(machInst, rdzr, imm16, hw * 16);
case 0x3:
return new Movk(machInst, rdzr, imm16, hw * 16);
default:
GEM5_UNREACHABLE;
}
}
case 0x6:
if ((sf != n) || (!sf && (bits(immr, 5) || bits(imms, 5))))
return new Unknown64(machInst);
switch (opc) {
case 0x0:
return new Sbfm64(machInst, rdzr, rn, immr, imms);
case 0x1:
return new Bfm64(machInst, rdzr, rn, immr, imms);
case 0x2:
return new Ubfm64(machInst, rdzr, rn, immr, imms);
case 0x3:
return new Unknown64(machInst);
default:
GEM5_UNREACHABLE;
}
case 0x7:
{
RegIndex rm = (RegIndex)(uint8_t)bits(machInst, 20, 16);
if (opc || bits(machInst, 21))
return new Unknown64(machInst);
else
return new Extr64(machInst, rdzr, rn, rm, imms);
}
}
return new FailUnimplemented("Unhandled Case8", machInst);
}
}
}};
output decoder {{
namespace Aarch64
{
StaticInstPtr
decodeBranchExcSys(const Decoder &dec, ExtMachInst machInst)
{
switch (bits(machInst, 30, 29)) {
case 0x0:
{
int64_t imm = sext<26>(bits(machInst, 25, 0)) << 2;
if (bits(machInst, 31) == 0)
return new B64(machInst, imm);
else
return new Bl64(machInst, imm);
}
case 0x1:
{
RegIndex rt = (RegIndex)(uint8_t)bits(machInst, 4, 0);
if (bits(machInst, 25) == 0) {
int64_t imm = sext<19>(bits(machInst, 23, 5)) << 2;
if (bits(machInst, 24) == 0)
return new Cbz64(machInst, imm, rt);
else
return new Cbnz64(machInst, imm, rt);
} else {
uint64_t bitmask = 0x1;
bitmask <<= bits(machInst, 23, 19);
int64_t imm = sext<14>(bits(machInst, 18, 5)) << 2;
if (bits(machInst, 31))
bitmask <<= 32;
if (bits(machInst, 24) == 0)
return new Tbz64(machInst, bitmask, imm, rt);
else
return new Tbnz64(machInst, bitmask, imm, rt);
}
}
case 0x2:
// bit 30:26=10101
if (bits(machInst, 31) == 0) {
if (bits(machInst, 25, 24) || bits(machInst, 4))
return new Unknown64(machInst);
int64_t imm = sext<19>(bits(machInst, 23, 5)) << 2;
ConditionCode condCode =
(ConditionCode)(uint8_t)(bits(machInst, 3, 0));
return new BCond64(machInst, imm, condCode);
} else if (bits(machInst, 25, 24) == 0x0) {
if (bits(machInst, 4, 2))
return new Unknown64(machInst);
auto imm16 = bits(machInst, 20, 5);
uint8_t decVal = (bits(machInst, 1, 0) << 0) |
(bits(machInst, 23, 21) << 2);
switch (decVal) {
case 0x01:
return new Svc64(machInst, imm16);
case 0x02:
return new Hvc64(machInst, imm16);
case 0x03:
return new Smc64(machInst, imm16);
case 0x04:
return new Brk64(machInst, imm16);
case 0x08:
return new Hlt64(machInst, imm16);
case 0x0c:
return new Tcancel64(machInst, imm16);
case 0x15:
return new FailUnimplemented("dcps1", machInst);
case 0x16:
return new FailUnimplemented("dcps2", machInst);
case 0x17:
return new FailUnimplemented("dcps3", machInst);
default:
return new Unknown64(machInst);
}
} else if (bits(machInst, 25, 22) == 0x4) {
// bit 31:22=1101010100
bool l = bits(machInst, 21);
uint8_t op0 = bits(machInst, 20, 19);
uint8_t op1 = bits(machInst, 18, 16);
uint8_t crn = bits(machInst, 15, 12);
uint8_t crm = bits(machInst, 11, 8);
uint8_t op2 = bits(machInst, 7, 5);
RegIndex rt = (RegIndex)(uint8_t)bits(machInst, 4, 0);
switch (op0) {
case 0x0:
// early out for TME
if (crn == 0x3 && op1 == 0x3 && op2 == 0x3) {
switch (crm) {
case 0x0:
if (rt == 0b11111)
return new Tcommit64(machInst);
else
return new Tstart64(machInst, rt);
case 0x1:
return new Ttest64(machInst, rt);
default:
return new Unknown64(machInst);
}
}
else if (rt != 0x1f || l)
return new Unknown64(machInst);
if (crn == 0x2 && op1 == 0x3) {
switch (crm) {
case 0x0:
switch (op2) {
case 0x0:
return new NopInst(machInst);
case 0x1:
return new YieldInst(machInst);
case 0x2:
return new WfeInst(machInst);
case 0x3:
return new WfiInst(machInst);
case 0x4:
return new SevInst(machInst);
case 0x5:
return new SevlInst(machInst);
case 0x7:
return new Xpaclri(machInst, int_reg::X30);
}
break;
case 0x1:
switch (op2) {
case 0x0:
return new Pacia1716(machInst, int_reg::X17,
int_reg::X16);
case 0x2:
return new Pacib1716(machInst, int_reg::X17,
int_reg::X16);
case 0x4:
return new Autia1716(machInst, int_reg::X17,
int_reg::X16);
case 0x6:
return new Autib1716(machInst, int_reg::X17,
int_reg::X16);
}
break;
case 0x2:
switch (op2) {
case 0x0:
return new WarnUnimplemented(
"esb", machInst);
case 0x1:
return new WarnUnimplemented(
"psb csync", machInst);
case 0x2:
return new WarnUnimplemented(
"tsb csync", machInst);
case 0x4:
return new WarnUnimplemented(
"csdb", machInst);
}
break;
case 0x3:
switch (op2) {
case 0x0:
return new Paciaz(machInst,
int_reg::X30, int_reg::Zero);
case 0x1:
return new Paciasp(machInst,
int_reg::X30, int_reg::Spx);
case 0x2:
return new Pacibz(machInst,
int_reg::X30, int_reg::Zero);
case 0x3:
return new Pacibsp(machInst,
int_reg::X30, int_reg::Spx);
case 0x4:
return new Autiaz(machInst,
int_reg::X30, int_reg::Zero);
case 0x5:
return new Autiasp(machInst,
int_reg::X30, int_reg::Spx);
case 0x6:
return new Autibz(machInst,
int_reg::X30, int_reg::Zero);
case 0x7:
return new Autibsp(machInst,
int_reg::X30, int_reg::Spx);
}
break;
case 0x4:
switch (op2 & 0x1) {
case 0x0:
return new WarnUnimplemented(
"bti", machInst);
}
break;
}
return new WarnUnimplemented(
"unallocated_hint", machInst);
} else if (crn == 0x3 && op1 == 0x3) {
switch (op2) {
case 0x2:
return new Clrex64(machInst);
case 0x4:
switch (bits(crm, 3, 2)) {
case 0x1: // Non-Shareable
return new Dsb64Local(machInst);
case 0x0: // OuterShareable
case 0x2: // InnerShareable
case 0x3: // FullSystem
return new Dsb64Shareable(
machInst, dec.dvmEnabled);
default:
GEM5_UNREACHABLE;
}
case 0x5:
return new Dmb64(machInst);
case 0x6:
return new Isb64(machInst);
default:
return new Unknown64(machInst);
}
} else if (crn == 0x4) {
// MSR immediate: moving immediate value to selected
// bits of the PSTATE
switch (op1 << 3 | op2) {
case 0x3:
// UAO
return new MsrImm64(
machInst, MISCREG_UAO, crm);
case 0x4:
// PAN
return new MsrImm64(
machInst, MISCREG_PAN, crm);
case 0x5:
// SP
return new MsrImm64(
machInst, MISCREG_SPSEL, crm);
case 0x1b:
// SVE SVCR - SMSTART/SMSTOP
return decodeSmeMgmt(machInst);
case 0x1e:
// DAIFSet
return new MsrImmDAIFSet64(
machInst, MISCREG_DAIF, crm);
case 0x1f:
// DAIFClr
return new MsrImmDAIFClr64(
machInst, MISCREG_DAIF, crm);
default:
return new Unknown64(machInst);
}
} else {
return new Unknown64(machInst);
}
break;
case 0x1:
case 0x2:
case 0x3:
{
// bit 31:22=1101010100, 20:19=11
bool read = l;
MiscRegIndex miscReg =
decodeAArch64SysReg(op0, op1, crn, crm, op2);
// Check for invalid registers
if (miscReg == MISCREG_UNKNOWN) {
auto full_mnemonic =
csprintf("%s op0:%d op1:%d crn:%d crm:%d op2:%d",
read ? "mrs" : "msr",
op0, op1, crn, crm, op2);
return new FailUnimplemented(read ? "mrs" : "msr",
machInst, full_mnemonic);
} else if (miscReg == MISCREG_IMPDEF_UNIMPL) {
auto full_mnemonic =
csprintf("%s op0:%d op1:%d crn:%d crm:%d op2:%d",
read ? "mrs" : "msr",
op0, op1, crn, crm, op2);
return new MiscRegImplDefined64(
read ? "mrs" : "msr",
machInst, MiscRegNum64(op0, op1, crn, crm, op2),
rt, read, full_mnemonic);
} else {
if (read) {
switch (miscReg) {
case MISCREG_NZCV:
return new MrsNZCV64(machInst, rt, miscReg);
case MISCREG_DC_CIVAC_Xt:
case MISCREG_DC_CVAC_Xt:
case MISCREG_DC_IVAC_Xt:
case MISCREG_DC_ZVA_Xt:
return new Unknown64(machInst);
default: {
StaticInstPtr si = new Mrs64(machInst, rt, miscReg);
if (lookUpMiscReg[miscReg].info[MISCREG_UNVERIFIABLE])
si->setFlag(StaticInst::IsUnverifiable);
return si;
}
}
} else {
switch (miscReg) {
case MISCREG_NZCV:
return new MsrNZCV64(machInst, miscReg, rt);
case MISCREG_DC_ZVA_Xt:
return new Dczva(machInst, rt, miscReg);
case MISCREG_DC_CVAU_Xt:
return new Dccvau(machInst, rt, miscReg);
case MISCREG_DC_CVAC_Xt:
return new Dccvac(machInst, rt, miscReg);
case MISCREG_DC_CIVAC_Xt:
return new Dccivac(machInst, rt, miscReg);
case MISCREG_DC_IVAC_Xt:
return new Dcivac(machInst, rt, miscReg);
// 64-bit TLBIs split into "Local"
// and "Shareable"
case MISCREG_TLBI_ALLE3:
case MISCREG_TLBI_ALLE2:
case MISCREG_TLBI_ALLE1:
case MISCREG_TLBI_VMALLS12E1:
case MISCREG_TLBI_VMALLE1:
case MISCREG_TLBI_VAE3_Xt:
case MISCREG_TLBI_VALE3_Xt:
case MISCREG_TLBI_VAE2_Xt:
case MISCREG_TLBI_VALE2_Xt:
case MISCREG_TLBI_VAE1_Xt:
case MISCREG_TLBI_VALE1_Xt:
case MISCREG_TLBI_ASIDE1_Xt:
case MISCREG_TLBI_VAAE1_Xt:
case MISCREG_TLBI_VAALE1_Xt:
case MISCREG_TLBI_IPAS2E1_Xt:
case MISCREG_TLBI_IPAS2LE1_Xt:
return new Tlbi64LocalHub(
machInst, miscReg, rt);
case MISCREG_TLBI_ALLE3IS:
case MISCREG_TLBI_ALLE2IS:
case MISCREG_TLBI_ALLE1IS:
case MISCREG_TLBI_VMALLS12E1IS:
case MISCREG_TLBI_VMALLE1IS:
case MISCREG_TLBI_VAE3IS_Xt:
case MISCREG_TLBI_VALE3IS_Xt:
case MISCREG_TLBI_VAE2IS_Xt:
case MISCREG_TLBI_VALE2IS_Xt:
case MISCREG_TLBI_VAE1IS_Xt:
case MISCREG_TLBI_VALE1IS_Xt:
case MISCREG_TLBI_ASIDE1IS_Xt:
case MISCREG_TLBI_VAAE1IS_Xt:
case MISCREG_TLBI_VAALE1IS_Xt:
case MISCREG_TLBI_IPAS2E1IS_Xt:
case MISCREG_TLBI_IPAS2LE1IS_Xt:
return new Tlbi64ShareableHub(
machInst, miscReg, rt, dec.dvmEnabled);
default:
return new Msr64(machInst, miscReg, rt);
}
}
}
}
break;
default:
GEM5_UNREACHABLE;
}
} else if (bits(machInst, 25) == 0x1) {
uint8_t opc = bits(machInst, 24, 21);
uint8_t op2 = bits(machInst, 20, 16);
uint8_t op3 = bits(machInst, 15, 12);
RegIndex rn = (RegIndex)(uint8_t)bits(machInst, 9, 5);
RegIndex rm = (RegIndex)(uint8_t)bits(machInst, 4, 0);
uint8_t op4 = bits(machInst, 4, 0);
if (op2 != 0x1f || op3 != 0x0)
return new Unknown64(machInst);
switch (opc) {
case 0x0:
if (bits(machInst, 11) == 0)
return new Br64(machInst, rn);
else if (op4 != 0x1f)
return new Unknown64(machInst);
// 24(Z):0, 11(A):1
if (bits(machInst, 10) == 0)
return new Braaz(machInst, rn);
else
return new Brabz(machInst, rn);
case 0x1:
if (bits(machInst, 11) == 0)
return new Blr64(machInst, rn);
else if (op4 != 0x1f)
return new Unknown64(machInst);
// 24(Z):0, 11(A):1
if (bits(machInst, 10) == 0)
return new Blraaz(machInst, rn);
else
return new Blrabz(machInst, rn);
case 0x2:
if (op4 == 0x1f) {
bool m = bits(machInst, 10);
if (m)
return new Retab(machInst);
else
return new Retaa(machInst);
} else
return new Ret64(machInst, rn);
case 0x4:
if (rn != 0x1f)
return new Unknown64(machInst);
if (bits(machInst, 11) == 0)
return new Eret64(machInst);
else if (op4 != 0x1f)
return new Unknown64(machInst);
// 24(Z):0, 11(A):1
if (bits(machInst, 10) == 0)
return new Eretaa(machInst);
else
return new Eretab(machInst);
case 0x5:
if (rn != 0x1f)
return new Unknown64(machInst);
return new FailUnimplemented("dret", machInst);
case 0x8:
if (bits(machInst, 11) == 0)
return new Unknown64(machInst);
if (bits(machInst, 10) == 0)
return new Braa(machInst, rn, makeSP(rm));
else
return new Brab(machInst, rn, makeSP(rm));
case 0x9:
if (bits(machInst, 11) == 0)
return new Unknown64(machInst);
if (bits(machInst, 10) == 0)
return new Blraa(machInst, rn, makeSP(rm));
else
return new Blrab(machInst, rn, makeSP(rm));
default:
return new Unknown64(machInst);
}
}
[[fallthrough]];
default:
return new Unknown64(machInst);
}
return new FailUnimplemented("Unhandled Case7", machInst);
}
}
}};
output decoder {{
namespace Aarch64
{
StaticInstPtr
decodeAtomicArithOp(ExtMachInst machInst)
{
uint8_t opc = bits(machInst, 14, 12);
uint8_t o3 = bits(machInst, 15);
uint8_t size_ar = bits(machInst, 23, 22)<<0 | bits(machInst, 31, 30)<<2;
RegIndex rt = (RegIndex)(uint8_t)bits(machInst, 4, 0);
RegIndex rn = (RegIndex)(uint8_t)bits(machInst, 9, 5);
RegIndex rnsp = makeSP(rn);
RegIndex rs = (RegIndex)(uint8_t)bits(machInst, 20, 16);
uint8_t A_rt = bits(machInst, 4, 0)<<0 | bits(machInst, 23)<<5;
switch(opc) {
case 0x0:
switch(size_ar){
case 0x0:
if (o3 == 1)
return new SWPB(machInst, rt, rnsp, rs);
else if (A_rt == 0x1f)
return new STADDB(machInst, rt, rnsp, rs);
else
return new LDADDB(machInst, rt, rnsp, rs);
case 0x1 :
if (o3 == 1)
return new SWPLB(machInst, rt, rnsp, rs);
else if (A_rt == 0x1f)
return new STADDLB(machInst, rt, rnsp, rs);
else
return new LDADDLB(machInst, rt, rnsp, rs);
case 0x2:
if (o3 == 1)
return new SWPAB(machInst, rt, rnsp, rs);
else
return new LDADDAB(machInst, rt, rnsp, rs);
case 0x3:
if (o3 == 1)
return new SWPLAB(machInst, rt, rnsp, rs);
else
return new LDADDLAB(machInst, rt, rnsp, rs);
case 0x4:
if (o3 == 1)
return new SWPH(machInst, rt, rnsp, rs);
else if (A_rt == 0x1f)
return new STADDH(machInst, rt, rnsp, rs);
else
return new LDADDH(machInst, rt, rnsp, rs);
case 0x5 :
if (o3 == 1)
return new SWPLH(machInst, rt, rnsp, rs);
else if (A_rt == 0x1f)
return new STADDLH(machInst, rt, rnsp, rs);
else
return new LDADDLH(machInst, rt, rnsp, rs);
case 0x6:
if (o3 == 1)
return new SWPAH(machInst, rt, rnsp, rs);
else
return new LDADDAH(machInst, rt, rnsp, rs);
case 0x7:
if (o3 == 1)
return new SWPLAH(machInst, rt, rnsp, rs);
else
return new LDADDLAH(machInst, rt, rnsp, rs);
case 0x8:
if (o3 == 1)
return new SWP(machInst, rt, rnsp, rs);
else if (A_rt == 0x1f)
return new STADD(machInst, rt, rnsp, rs);
else
return new LDADD(machInst, rt, rnsp, rs);
case 0x9 :
if (o3 == 1)
return new SWPL(machInst, rt, rnsp, rs);
else if (A_rt == 0x1f)
return new STADDL(machInst, rt, rnsp, rs);
else
return new LDADDL(machInst, rt, rnsp, rs);
case 0xa:
if (o3 == 1)
return new SWPA(machInst, rt, rnsp, rs);
else
return new LDADDA(machInst, rt, rnsp, rs);
case 0xb:
if (o3 == 1)
return new SWPLA(machInst, rt, rnsp, rs);
else
return new LDADDLA(machInst, rt, rnsp, rs);
case 0xc:
if (o3 == 1)
return new SWP64(machInst, rt, rnsp, rs);
else if (A_rt == 0x1f)
return new STADD64(machInst, rt, rnsp, rs);
else
return new LDADD64(machInst, rt, rnsp, rs);
case 0xd :
if (o3 == 1)
return new SWPL64(machInst, rt, rnsp, rs);
else if (A_rt == 0x1f)
return new STADDL64(machInst, rt, rnsp, rs);
else
return new LDADDL64(machInst, rt, rnsp, rs);
case 0xe:
if (o3 == 1)
return new SWPA64(machInst, rt, rnsp, rs);
else
return new LDADDA64(machInst, rt, rnsp, rs);
case 0xf:
if (o3 == 1)
return new SWPLA64(machInst, rt, rnsp, rs);
else
return new LDADDLA64(machInst, rt, rnsp, rs);
default:
GEM5_UNREACHABLE;
}
case 0x1:
switch(size_ar){
case 0x0:
if (A_rt == 0x1f)
return new STCLRB(machInst, rt, rnsp, rs);
else
return new LDCLRB(machInst, rt, rnsp, rs);
case 0x1 :
if (A_rt == 0x1f)
return new STCLRLB(machInst, rt, rnsp, rs);
else
return new LDCLRLB(machInst, rt, rnsp, rs);
case 0x2:
return new LDCLRAB(machInst, rt, rnsp, rs);
case 0x3:
return new LDCLRLAB(machInst, rt, rnsp, rs);
case 0x4:
if (A_rt == 0x1f)
return new STCLRH(machInst, rt, rnsp, rs);
else
return new LDCLRH(machInst, rt, rnsp, rs);
case 0x5 :
if (A_rt == 0x1f)
return new STCLRLH(machInst, rt, rnsp, rs);
else
return new LDCLRLH(machInst, rt, rnsp, rs);
case 0x6:
return new LDCLRAH(machInst, rt, rnsp, rs);
case 0x7:
return new LDCLRLAH(machInst, rt, rnsp, rs);
case 0x8:
if (A_rt == 0x1f)
return new STCLR(machInst, rt, rnsp, rs);
else
return new LDCLR(machInst, rt, rnsp, rs);
case 0x9 :
if (A_rt == 0x1f)
return new STCLRL(machInst, rt, rnsp, rs);
else
return new LDCLRL(machInst, rt, rnsp, rs);
case 0xa:
return new LDCLRA(machInst, rt, rnsp, rs);
case 0xb:
return new LDCLRLA(machInst, rt, rnsp, rs);
case 0xc:
if (A_rt == 0x1f)
return new STCLR64(machInst, rt, rnsp, rs);
else
return new LDCLR64(machInst, rt, rnsp, rs);
case 0xd :
if (A_rt == 0x1f)
return new STCLRL64(machInst, rt, rnsp, rs);
else
return new LDCLRL64(machInst, rt, rnsp, rs);
case 0xe:
return new LDCLRA64(machInst, rt, rnsp, rs);
case 0xf:
return new LDCLRLA64(machInst, rt, rnsp, rs);
default:
GEM5_UNREACHABLE;
}
case 0x2:
switch(size_ar){
case 0x0:
if (A_rt == 0x1f)
return new STEORB(machInst, rt, rnsp, rs);
else
return new LDEORB(machInst, rt, rnsp, rs);
case 0x1 :
if (A_rt == 0x1f)
return new STEORLB(machInst, rt, rnsp, rs);
else
return new LDEORLB(machInst, rt, rnsp, rs);
case 0x2:
return new LDEORAB(machInst, rt, rnsp, rs);
case 0x3:
return new LDEORLAB(machInst, rt, rnsp, rs);
case 0x4:
if (A_rt == 0x1f)
return new STEORH(machInst, rt, rnsp, rs);
else
return new LDEORH(machInst, rt, rnsp, rs);
case 0x5 :
if (A_rt == 0x1f)
return new STEORLH(machInst, rt, rnsp, rs);
else
return new LDEORLH(machInst, rt, rnsp, rs);
case 0x6:
return new LDEORAH(machInst, rt, rnsp, rs);
case 0x7:
return new LDEORLAH(machInst, rt, rnsp, rs);
case 0x8:
if (A_rt == 0x1f)
return new STEOR(machInst, rt, rnsp, rs);
else
return new LDEOR(machInst, rt, rnsp, rs);
case 0x9 :
if (A_rt == 0x1f)
return new STEORL(machInst, rt, rnsp, rs);
else
return new LDEORL(machInst, rt, rnsp, rs);
case 0xa:
return new LDEORA(machInst, rt, rnsp, rs);
case 0xb:
return new LDEORLA(machInst, rt, rnsp, rs);
case 0xc:
if (A_rt == 0x1f)
return new STEOR64(machInst, rt, rnsp, rs);
else
return new LDEOR64(machInst, rt, rnsp, rs);
case 0xd :
if (A_rt == 0x1f)
return new STEORL64(machInst, rt, rnsp, rs);
else
return new LDEORL64(machInst, rt, rnsp, rs);
case 0xe:
return new LDEORA64(machInst, rt, rnsp, rs);
case 0xf:
return new LDEORLA64(machInst, rt, rnsp, rs);
default:
GEM5_UNREACHABLE;
}
case 0x3:
switch(size_ar){
case 0x0:
if (A_rt == 0x1f)
return new STSETB(machInst, rt, rnsp, rs);
else
return new LDSETB(machInst, rt, rnsp, rs);
case 0x1 :
if (A_rt == 0x1f)
return new STSETLB(machInst, rt, rnsp, rs);
else
return new LDSETLB(machInst, rt, rnsp, rs);
case 0x2:
return new LDSETAB(machInst, rt, rnsp, rs);
case 0x3:
return new LDSETLAB(machInst, rt, rnsp, rs);
case 0x4:
if (A_rt == 0x1f)
return new STSETH(machInst, rt, rnsp, rs);
else
return new LDSETH(machInst, rt, rnsp, rs);
case 0x5 :
if (A_rt == 0x1f)
return new STSETLH(machInst, rt, rnsp, rs);
else
return new LDSETLH(machInst, rt, rnsp, rs);
case 0x6:
return new LDSETAH(machInst, rt, rnsp, rs);
case 0x7:
return new LDSETLAH(machInst, rt, rnsp, rs);
case 0x8:
if (A_rt == 0x1f)
return new STSET(machInst, rt, rnsp, rs);
else
return new LDSET(machInst, rt, rnsp, rs);
case 0x9 :
if (A_rt == 0x1f)
return new STSETL(machInst, rt, rnsp, rs);
else
return new LDSETL(machInst, rt, rnsp, rs);
case 0xa:
return new LDSETA(machInst, rt, rnsp, rs);
case 0xb:
return new LDSETLA(machInst, rt, rnsp, rs);
case 0xc:
if (A_rt == 0x1f)
return new STSET64(machInst, rt, rnsp, rs);
else
return new LDSET64(machInst, rt, rnsp, rs);
case 0xd :
if (A_rt == 0x1f)
return new STSETL64(machInst, rt, rnsp, rs);
else
return new LDSETL64(machInst, rt, rnsp, rs);
case 0xe:
return new LDSETA64(machInst, rt, rnsp, rs);
case 0xf:
return new LDSETLA64(machInst, rt, rnsp, rs);
default:
GEM5_UNREACHABLE;
}
case 0x4:
switch(size_ar){
case 0x0:
if (A_rt == 0x1f)
return new STSMAXB(machInst, rt, rnsp, rs);
else
return new LDSMAXB(machInst, rt, rnsp, rs);
case 0x1 :
if (A_rt == 0x1f)
return new STSMAXLB(machInst, rt, rnsp, rs);
else
return new LDSMAXLB(machInst, rt, rnsp, rs);
case 0x2:
return new LDSMAXAB(machInst, rt, rnsp, rs);
case 0x3:
return new LDSMAXLAB(machInst, rt, rnsp, rs);
case 0x4:
if (A_rt == 0x1f)
return new STSMAXH(machInst, rt, rnsp, rs);
else
return new LDSMAXH(machInst, rt, rnsp, rs);
case 0x5 :
if (A_rt == 0x1f)
return new STSMAXLH(machInst, rt, rnsp, rs);
else
return new LDSMAXLH(machInst, rt, rnsp, rs);
case 0x6:
return new LDSMAXAH(machInst, rt, rnsp, rs);
case 0x7:
return new LDSMAXLAH(machInst, rt, rnsp, rs);
case 0x8:
if (A_rt == 0x1f)
return new STSMAX(machInst, rt, rnsp, rs);
else
return new LDSMAX(machInst, rt, rnsp, rs);
case 0x9 :
if (A_rt == 0x1f)
return new STSMAXL(machInst, rt, rnsp, rs);
else
return new LDSMAXL(machInst, rt, rnsp, rs);
case 0xa:
return new LDSMAXA(machInst, rt, rnsp, rs);
case 0xb:
return new LDSMAXLA(machInst, rt, rnsp, rs);
case 0xc:
if (A_rt == 0x1f)
return new STSMAX64(machInst, rt, rnsp, rs);
else
return new LDSMAX64(machInst, rt, rnsp, rs);
case 0xd :
if (A_rt == 0x1f)
return new STSMAXL64(machInst, rt, rnsp, rs);
else
return new LDSMAXL64(machInst, rt, rnsp, rs);
case 0xe:
return new LDSMAXA64(machInst, rt, rnsp, rs);
case 0xf:
return new LDSMAXLA64(machInst, rt, rnsp, rs);
default:
GEM5_UNREACHABLE;
}
case 0x5:
switch(size_ar){
case 0x0:
if (A_rt == 0x1f)
return new STSMINB(machInst, rt, rnsp, rs);
else
return new LDSMINB(machInst, rt, rnsp, rs);
case 0x1 :
if (A_rt == 0x1f)
return new STSMINLB(machInst, rt, rnsp, rs);
else
return new LDSMINLB(machInst, rt, rnsp, rs);
case 0x2:
return new LDSMINAB(machInst, rt, rnsp, rs);
case 0x3:
return new LDSMINLAB(machInst, rt, rnsp, rs);
case 0x4:
if (A_rt == 0x1f)
return new STSMINH(machInst, rt, rnsp, rs);
else
return new LDSMINH(machInst, rt, rnsp, rs);
case 0x5 :
if (A_rt == 0x1f)
return new STSMINLH(machInst, rt, rnsp, rs);
else
return new LDSMINLH(machInst, rt, rnsp, rs);
case 0x6:
return new LDSMINAH(machInst, rt, rnsp, rs);
case 0x7:
return new LDSMINLAH(machInst, rt, rnsp, rs);
case 0x8:
if (A_rt == 0x1f)
return new STSMIN(machInst, rt, rnsp, rs);
else
return new LDSMIN(machInst, rt, rnsp, rs);
case 0x9 :
if (A_rt == 0x1f)
return new STSMINL(machInst, rt, rnsp, rs);
else
return new LDSMINL(machInst, rt, rnsp, rs);
case 0xa:
return new LDSMINA(machInst, rt, rnsp, rs);
case 0xb:
return new LDSMINLA(machInst, rt, rnsp, rs);
case 0xc:
if (A_rt == 0x1f)
return new STSMIN64(machInst, rt, rnsp, rs);
else
return new LDSMIN64(machInst, rt, rnsp, rs);
case 0xd :
if (A_rt == 0x1f)
return new STSMINL64(machInst, rt, rnsp, rs);
else
return new LDSMINL64(machInst, rt, rnsp, rs);
case 0xe:
return new LDSMINA64(machInst, rt, rnsp, rs);
case 0xf:
return new LDSMINLA64(machInst, rt, rnsp, rs);
default:
GEM5_UNREACHABLE;
}
case 0x6:
switch(size_ar){
case 0x0:
if (A_rt == 0x1f)
return new STUMAXB(machInst, rt, rnsp, rs);
else
return new LDUMAXB(machInst, rt, rnsp, rs);
case 0x1 :
if (A_rt == 0x1f)
return new STUMAXLB(machInst, rt, rnsp, rs);
else
return new LDUMAXLB(machInst, rt, rnsp, rs);
case 0x2:
return new LDUMAXAB(machInst, rt, rnsp, rs);
case 0x3:
return new LDUMAXLAB(machInst, rt, rnsp, rs);
case 0x4:
if (A_rt == 0x1f)
return new STUMAXH(machInst, rt, rnsp, rs);
else
return new LDUMAXH(machInst, rt, rnsp, rs);
case 0x5 :
if (A_rt == 0x1f)
return new STUMAXLH(machInst, rt, rnsp, rs);
else
return new LDUMAXLH(machInst, rt, rnsp, rs);
case 0x6:
return new LDUMAXAH(machInst, rt, rnsp, rs);
case 0x7:
return new LDUMAXLAH(machInst, rt, rnsp, rs);
case 0x8:
if (A_rt == 0x1f)
return new STUMAX(machInst, rt, rnsp, rs);
else
return new LDUMAX(machInst, rt, rnsp, rs);
case 0x9 :
if (A_rt == 0x1f)
return new STUMAXL(machInst, rt, rnsp, rs);
else
return new LDUMAXL(machInst, rt, rnsp, rs);
case 0xa:
return new LDUMAXA(machInst, rt, rnsp, rs);
case 0xb:
return new LDUMAXLA(machInst, rt, rnsp, rs);
case 0xc:
if (A_rt == 0x1f)
return new STUMAX64(machInst, rt, rnsp, rs);
else
return new LDUMAX64(machInst, rt, rnsp, rs);
case 0xd :
if (A_rt == 0x1f)
return new STUMAXL64(machInst, rt, rnsp, rs);
else
return new LDUMAXL64(machInst, rt, rnsp, rs);
case 0xe:
return new LDUMAXA64(machInst, rt, rnsp, rs);
case 0xf:
return new LDUMAXLA64(machInst, rt, rnsp, rs);
default:
GEM5_UNREACHABLE;
}
case 0x7:
switch(size_ar){
case 0x0:
if (A_rt == 0x1f)
return new STUMINB(machInst, rt, rnsp, rs);
else
return new LDUMINB(machInst, rt, rnsp, rs);
case 0x1 :
if (A_rt == 0x1f)
return new STUMINLB(machInst, rt, rnsp, rs);
else
return new LDUMINLB(machInst, rt, rnsp, rs);
case 0x2:
return new LDUMINAB(machInst, rt, rnsp, rs);
case 0x3:
return new LDUMINLAB(machInst, rt, rnsp, rs);
case 0x4:
if (A_rt == 0x1f)
return new STUMINH(machInst, rt, rnsp, rs);
else
return new LDUMINH(machInst, rt, rnsp, rs);
case 0x5 :
if (A_rt == 0x1f)
return new STUMINLH(machInst, rt, rnsp, rs);
else
return new LDUMINLH(machInst, rt, rnsp, rs);
case 0x6:
return new LDUMINAH(machInst, rt, rnsp, rs);
case 0x7:
return new LDUMINLAH(machInst, rt, rnsp, rs);
case 0x8:
if (A_rt == 0x1f)
return new STUMIN(machInst, rt, rnsp, rs);
else
return new LDUMIN(machInst, rt, rnsp, rs);
case 0x9 :
if (A_rt == 0x1f)
return new STUMINL(machInst, rt, rnsp, rs);
else
return new LDUMINL(machInst, rt, rnsp, rs);
case 0xa:
return new LDUMINA(machInst, rt, rnsp, rs);
case 0xb:
return new LDUMINLA(machInst, rt, rnsp, rs);
case 0xc:
if (A_rt == 0x1f)
return new STUMIN64(machInst, rt, rnsp, rs);
else
return new LDUMIN64(machInst, rt, rnsp, rs);
case 0xd :
if (A_rt == 0x1f)
return new STUMINL64(machInst, rt, rnsp, rs);
else
return new LDUMINL64(machInst, rt, rnsp, rs);
case 0xe:
return new LDUMINA64(machInst, rt, rnsp, rs);
case 0xf:
return new LDUMINLA64(machInst, rt, rnsp, rs);
default:
GEM5_UNREACHABLE;
}
default:
return new Unknown64(machInst);
}
}
}
}};
output decoder {{
namespace Aarch64
{
StaticInstPtr
decodeLoadsStores(ExtMachInst machInst)
{
// bit 27,25=10
switch (bits(machInst, 29, 28)) {
case 0x0:
if (bits(machInst, 26) == 0) {
if (bits(machInst, 24) != 0)
return new Unknown64(machInst);
RegIndex rt = (RegIndex)(uint8_t)bits(machInst, 4, 0);
RegIndex rn = (RegIndex)(uint8_t)bits(machInst, 9, 5);
RegIndex rnsp = makeSP(rn);
RegIndex rt2 = (RegIndex)(uint8_t)bits(machInst, 14, 10);
RegIndex rs = (RegIndex)(uint8_t)bits(machInst, 20, 16);
uint8_t opc = (bits(machInst, 15) << 0) |
(bits(machInst, 23, 21) << 1);
uint8_t size = bits(machInst, 31, 30);
switch (opc) {
case 0x0:
switch (size) {
case 0x0:
return new STXRB64(machInst, rt, rnsp, rs);
case 0x1:
return new STXRH64(machInst, rt, rnsp, rs);
case 0x2:
return new STXRW64(machInst, rt, rnsp, rs);
case 0x3:
return new STXRX64(machInst, rt, rnsp, rs);
default:
GEM5_UNREACHABLE;
}
case 0x1:
switch (size) {
case 0x0:
return new STLXRB64(machInst, rt, rnsp, rs);
case 0x1:
return new STLXRH64(machInst, rt, rnsp, rs);
case 0x2:
return new STLXRW64(machInst, rt, rnsp, rs);
case 0x3:
return new STLXRX64(machInst, rt, rnsp, rs);
default:
GEM5_UNREACHABLE;
}
case 0x2:
switch (size) {
case 0x0:
return new CASP32(machInst, rt, rnsp, rs);
case 0x1:
return new CASP64(machInst, rt, rnsp, rs);
case 0x2:
return new STXPW64(machInst, rs, rt, rt2, rnsp);
case 0x3:
return new STXPX64(machInst, rs, rt, rt2, rnsp);
default:
GEM5_UNREACHABLE;
}
case 0x3:
switch (size) {
case 0x0:
return new CASPL32(machInst, rt, rnsp, rs);
case 0x1:
return new CASPL64(machInst, rt, rnsp, rs);
case 0x2:
return new STLXPW64(machInst, rs, rt, rt2, rnsp);
case 0x3:
return new STLXPX64(machInst, rs, rt, rt2, rnsp);
default:
GEM5_UNREACHABLE;
}
case 0x4:
switch (size) {
case 0x0:
return new LDXRB64(machInst, rt, rnsp, rs);
case 0x1:
return new LDXRH64(machInst, rt, rnsp, rs);
case 0x2:
return new LDXRW64(machInst, rt, rnsp, rs);
case 0x3:
return new LDXRX64(machInst, rt, rnsp, rs);
default:
GEM5_UNREACHABLE;
}
case 0x5:
switch (size) {
case 0x0:
return new LDAXRB64(machInst, rt, rnsp, rs);
case 0x1:
return new LDAXRH64(machInst, rt, rnsp, rs);
case 0x2:
return new LDAXRW64(machInst, rt, rnsp, rs);
case 0x3:
return new LDAXRX64(machInst, rt, rnsp, rs);
default:
GEM5_UNREACHABLE;
}
case 0x6:
switch (size) {
case 0x0:
return new CASPA32(machInst, rt, rnsp, rs);
case 0x1:
return new CASPA64(machInst, rt, rnsp, rs);
case 0x2:
return new LDXPW64(machInst, rt, rt2, rnsp);
case 0x3:
return new LDXPX64(machInst, rt, rt2, rnsp);
default:
GEM5_UNREACHABLE;
}
case 0x7:
switch (size) {
case 0x0:
return new CASPAL32(machInst, rt, rnsp, rs);
case 0x1:
return new CASPAL64(machInst, rt, rnsp, rs);
case 0x2:
return new LDAXPW64(machInst, rt, rt2, rnsp);
case 0x3:
return new LDAXPX64(machInst, rt, rt2, rnsp);
default:
GEM5_UNREACHABLE;
}
case 0x9:
switch (size) {
case 0x0:
return new STLRB64(machInst, rt, rnsp);
case 0x1:
return new STLRH64(machInst, rt, rnsp);
case 0x2:
return new STLRW64(machInst, rt, rnsp);
case 0x3:
return new STLRX64(machInst, rt, rnsp);
default:
GEM5_UNREACHABLE;
}
case 0xa:
switch (size) {
case 0x0:
return new CASB(machInst, rt, rnsp, rs);
case 0x1:
return new CASH(machInst, rt, rnsp, rs);
case 0x2:
return new CAS32(machInst, rt, rnsp, rs);
case 0x3:
return new CAS64(machInst, rt, rnsp, rs);
default:
GEM5_UNREACHABLE;
}
case 0xb:
switch (size) {
case 0x0:
return new CASLB(machInst, rt, rnsp, rs);
case 0x1:
return new CASLH(machInst, rt, rnsp, rs);
case 0x2:
return new CASL32(machInst, rt, rnsp, rs);
case 0x3:
return new CASL64(machInst, rt, rnsp, rs);
default:
GEM5_UNREACHABLE;
}
case 0xd:
switch (size) {
case 0x0:
return new LDARB64(machInst, rt, rnsp);
case 0x1:
return new LDARH64(machInst, rt, rnsp);
case 0x2:
return new LDARW64(machInst, rt, rnsp);
case 0x3:
return new LDARX64(machInst, rt, rnsp);
default:
GEM5_UNREACHABLE;
}
case 0xe:
switch (size) {
case 0x0:
return new CASAB(machInst, rt, rnsp, rs);
case 0x1:
return new CASAH(machInst, rt, rnsp, rs);
case 0x2:
return new CASA32(machInst, rt, rnsp, rs);
case 0x3:
return new CASA64(machInst, rt, rnsp, rs);
default:
GEM5_UNREACHABLE;
}
case 0xf:
switch (size) {
case 0x0:
return new CASALB(machInst, rt, rnsp, rs);
case 0x1:
return new CASALH(machInst, rt, rnsp, rs);
case 0x2:
return new CASAL32(machInst, rt, rnsp, rs);
case 0x3:
return new CASAL64(machInst, rt, rnsp, rs);
default:
GEM5_UNREACHABLE;
}
default:
return new Unknown64(machInst);
}
} else if (bits(machInst, 31)) {
return new Unknown64(machInst);
} else {
return decodeNeonMem(machInst);
}
case 0x1:
{
if (bits(machInst, 24) != 0)
return new Unknown64(machInst);
uint8_t switchVal = (bits(machInst, 26) << 0) |
(bits(machInst, 31, 30) << 1);
int64_t imm = sext<19>(bits(machInst, 23, 5)) << 2;
RegIndex rt = (RegIndex)(uint32_t)bits(machInst, 4, 0);
switch (switchVal) {
case 0x0:
return new LDRWL64_LIT(machInst, rt, imm);
case 0x1:
return new LDRSFP64_LIT(machInst, rt, imm);
case 0x2:
return new LDRXL64_LIT(machInst, rt, imm);
case 0x3:
return new LDRDFP64_LIT(machInst, rt, imm);
case 0x4:
return new LDRSWL64_LIT(machInst, rt, imm);
case 0x5:
return new BigFpMemLit("ldr", machInst, rt, imm);
case 0x6:
return new PRFM64_LIT(machInst, rt, imm);
default:
return new Unknown64(machInst);
}
}
case 0x2:
{
uint8_t opc = bits(machInst, 31, 30);
if (opc >= 3)
return new Unknown64(machInst);
uint32_t size = 0;
bool fp = bits(machInst, 26);
bool load = bits(machInst, 22);
if (fp) {
size = 4 << opc;
} else {
if ((opc == 1) && !load)
return new Unknown64(machInst);
size = (opc == 0 || opc == 1) ? 4 : 8;
}
uint8_t type = bits(machInst, 24, 23);
int64_t imm = sext<7>(bits(machInst, 21, 15)) * size;
RegIndex rn = (RegIndex)(uint8_t)bits(machInst, 9, 5);
RegIndex rt = (RegIndex)(uint8_t)bits(machInst, 4, 0);
RegIndex rt2 = (RegIndex)(uint8_t)bits(machInst, 14, 10);
bool noAlloc = (type == 0);
bool signExt = !noAlloc && !fp && opc == 1;
PairMemOp::AddrMode mode;
const char *mnemonic = NULL;
switch (type) {
case 0x0:
case 0x2:
mode = PairMemOp::AddrMd_Offset;
break;
case 0x1:
mode = PairMemOp::AddrMd_PostIndex;
break;
case 0x3:
mode = PairMemOp::AddrMd_PreIndex;
break;
default:
return new Unknown64(machInst);
}
if (load) {
if (noAlloc)
mnemonic = "ldnp";
else if (signExt)
mnemonic = "ldpsw";
else
mnemonic = "ldp";
} else {
if (noAlloc)
mnemonic = "stnp";
else
mnemonic = "stp";
}
return new LdpStp(mnemonic, machInst, size, fp, load, noAlloc,
signExt, false, false, imm, mode, rn, rt, rt2);
}
// bit 29:27=111, 25=0
case 0x3:
{
uint8_t switchVal = (bits(machInst, 23, 22) << 0) |
(bits(machInst, 26) << 2) |
(bits(machInst, 31, 30) << 3);
if (bits(machInst, 24) == 1) {
uint64_t imm12 = bits(machInst, 21, 10);
RegIndex rt = (RegIndex)(uint32_t)bits(machInst, 4, 0);
RegIndex rn = (RegIndex)(uint32_t)bits(machInst, 9, 5);
RegIndex rnsp = makeSP(rn);
switch (switchVal) {
case 0x00:
return new STRB64_IMM(machInst, rt, rnsp, imm12);
case 0x01:
return new LDRB64_IMM(machInst, rt, rnsp, imm12);
case 0x02:
return new LDRSBX64_IMM(machInst, rt, rnsp, imm12);
case 0x03:
return new LDRSBW64_IMM(machInst, rt, rnsp, imm12);
case 0x04:
return new STRBFP64_IMM(machInst, rt, rnsp, imm12);
case 0x05:
return new LDRBFP64_IMM(machInst, rt, rnsp, imm12);
case 0x06:
return new BigFpMemImm("str", machInst, false,
rt, rnsp, imm12 << 4);
case 0x07:
return new BigFpMemImm("ldr", machInst, true,
rt, rnsp, imm12 << 4);
case 0x08:
return new STRH64_IMM(machInst, rt, rnsp, imm12 << 1);
case 0x09:
return new LDRH64_IMM(machInst, rt, rnsp, imm12 << 1);
case 0x0a:
return new LDRSHX64_IMM(machInst, rt, rnsp, imm12 << 1);
case 0x0b:
return new LDRSHW64_IMM(machInst, rt, rnsp, imm12 << 1);
case 0x0c:
return new STRHFP64_IMM(machInst, rt, rnsp, imm12 << 1);
case 0x0d:
return new LDRHFP64_IMM(machInst, rt, rnsp, imm12 << 1);
case 0x10:
return new STRW64_IMM(machInst, rt, rnsp, imm12 << 2);
case 0x11:
return new LDRW64_IMM(machInst, rt, rnsp, imm12 << 2);
case 0x12:
return new LDRSW64_IMM(machInst, rt, rnsp, imm12 << 2);
case 0x14:
return new STRSFP64_IMM(machInst, rt, rnsp, imm12 << 2);
case 0x15:
return new LDRSFP64_IMM(machInst, rt, rnsp, imm12 << 2);
case 0x18:
return new STRX64_IMM(machInst, rt, rnsp, imm12 << 3);
case 0x19:
return new LDRX64_IMM(machInst, rt, rnsp, imm12 << 3);
case 0x1a:
return new PRFM64_IMM(machInst, rt, rnsp, imm12 << 3);
case 0x1c:
return new STRDFP64_IMM(machInst, rt, rnsp, imm12 << 3);
case 0x1d:
return new LDRDFP64_IMM(machInst, rt, rnsp, imm12 << 3);
default:
return new Unknown64(machInst);
}
} else if (bits(machInst, 21) == 1) {
uint8_t group = bits(machInst, 11, 10);
switch (group) {
case 0x0:
{
if ((switchVal & 0x7) == 0x2 &&
bits(machInst, 20, 12) == 0x1fc) {
RegIndex rt = (RegIndex)(uint32_t)
bits(machInst, 4, 0);
RegIndex rn = (RegIndex)(uint32_t)
bits(machInst, 9, 5);
RegIndex rnsp = makeSP(rn);
uint8_t size = bits(machInst, 31, 30);
switch (size) {
case 0x0:
return new LDAPRB64(machInst, rt, rnsp);
case 0x1:
return new LDAPRH64(machInst, rt, rnsp);
case 0x2:
return new LDAPRW64(machInst, rt, rnsp);
case 0x3:
return new LDAPRX64(machInst, rt, rnsp);
default:
GEM5_UNREACHABLE;
}
} else {
return decodeAtomicArithOp(machInst);
}
}
case 0x1:
case 0x3:
{
RegIndex rt = (RegIndex)(uint32_t)
bits(machInst, 4, 0);
RegIndex rn = (RegIndex)(uint32_t)
bits(machInst, 9, 5);
uint8_t s = bits(machInst, 22);
uint64_t imm9 = bits(machInst, 20, 12);
uint64_t imm10 = sext<10>(s<<9 | imm9)<<3;
uint8_t val = bits(machInst, 23)<<1
| bits(machInst, 11);
switch (val) {
case 0x0:
return new LDRAA_REG(machInst, rt,
makeSP(rn), imm10);
case 0x1:
return new LDRAA_PRE(machInst, rt,
makeSP(rn), imm10);
case 0x2:
return new LDRAB_REG(machInst, rt,
makeSP(rn), imm10);
case 0x3:
return new LDRAB_PRE(machInst, rt,
makeSP(rn), imm10);
default:
GEM5_UNREACHABLE;
}
}
case 0x2:
{
if (!bits(machInst, 14))
return new Unknown64(machInst);
RegIndex rt = (RegIndex)(uint32_t)
bits(machInst, 4, 0);
RegIndex rn = (RegIndex)(uint32_t)
bits(machInst, 9, 5);
RegIndex rnsp = makeSP(rn);
RegIndex rm = (RegIndex)(uint32_t)
bits(machInst, 20, 16);
ArmExtendType type =
(ArmExtendType)(uint32_t)bits(machInst, 15, 13);
uint8_t s = bits(machInst, 12);
switch (switchVal) {
case 0x00:
return new STRB64_REG(machInst, rt, rnsp, rm,
type, 0);
case 0x01:
return new LDRB64_REG(machInst, rt, rnsp, rm,
type, 0);
case 0x02:
return new LDRSBX64_REG(machInst, rt, rnsp, rm,
type, 0);
case 0x03:
return new LDRSBW64_REG(machInst, rt, rnsp, rm,
type, 0);
case 0x04:
return new STRBFP64_REG(machInst, rt, rnsp, rm,
type, 0);
case 0x05:
return new LDRBFP64_REG(machInst, rt, rnsp, rm,
type, 0);
case 0x6:
return new BigFpMemReg("str", machInst, false,
rt, rnsp, rm, type, s * 4);
case 0x7:
return new BigFpMemReg("ldr", machInst, true,
rt, rnsp, rm, type, s * 4);
case 0x08:
return new STRH64_REG(machInst, rt, rnsp, rm,
type, s);
case 0x09:
return new LDRH64_REG(machInst, rt, rnsp, rm,
type, s);
case 0x0a:
return new LDRSHX64_REG(machInst, rt, rnsp, rm,
type, s);
case 0x0b:
return new LDRSHW64_REG(machInst, rt, rnsp, rm,
type, s);
case 0x0c:
return new STRHFP64_REG(machInst, rt, rnsp, rm,
type, s);
case 0x0d:
return new LDRHFP64_REG(machInst, rt, rnsp, rm,
type, s);
case 0x10:
return new STRW64_REG(machInst, rt, rnsp, rm,
type, s * 2);
case 0x11:
return new LDRW64_REG(machInst, rt, rnsp, rm,
type, s * 2);
case 0x12:
return new LDRSW64_REG(machInst, rt, rnsp, rm,
type, s * 2);
case 0x14:
return new STRSFP64_REG(machInst, rt, rnsp, rm,
type, s * 2);
case 0x15:
return new LDRSFP64_REG(machInst, rt, rnsp, rm,
type, s * 2);
case 0x18:
return new STRX64_REG(machInst, rt, rnsp, rm,
type, s * 3);
case 0x19:
return new LDRX64_REG(machInst, rt, rnsp, rm,
type, s * 3);
case 0x1a:
return new PRFM64_REG(machInst, rt, rnsp, rm,
type, s * 3);
case 0x1c:
return new STRDFP64_REG(machInst, rt, rnsp, rm,
type, s * 3);
case 0x1d:
return new LDRDFP64_REG(machInst, rt, rnsp, rm,
type, s * 3);
default:
return new Unknown64(machInst);
}
}
default:
return new Unknown64(machInst);
}
} else {
// bit 29:27=111, 25:24=00, 21=0
switch (bits(machInst, 11, 10)) {
case 0x0:
{
RegIndex rt =
(RegIndex)(uint32_t)bits(machInst, 4, 0);
RegIndex rn =
(RegIndex)(uint32_t)bits(machInst, 9, 5);
RegIndex rnsp = makeSP(rn);
uint64_t imm = sext<9>(bits(machInst, 20, 12));
switch (switchVal) {
case 0x00:
return new STURB64_IMM(machInst, rt, rnsp, imm);
case 0x01:
return new LDURB64_IMM(machInst, rt, rnsp, imm);
case 0x02:
return new LDURSBX64_IMM(machInst, rt, rnsp, imm);
case 0x03:
return new LDURSBW64_IMM(machInst, rt, rnsp, imm);
case 0x04:
return new STURBFP64_IMM(machInst, rt, rnsp, imm);
case 0x05:
return new LDURBFP64_IMM(machInst, rt, rnsp, imm);
case 0x06:
return new BigFpMemImm("stur", machInst, false,
rt, rnsp, imm);
case 0x07:
return new BigFpMemImm("ldur", machInst, true,
rt, rnsp, imm);
case 0x08:
return new STURH64_IMM(machInst, rt, rnsp, imm);
case 0x09:
return new LDURH64_IMM(machInst, rt, rnsp, imm);
case 0x0a:
return new LDURSHX64_IMM(machInst, rt, rnsp, imm);
case 0x0b:
return new LDURSHW64_IMM(machInst, rt, rnsp, imm);
case 0x0c:
return new STURHFP64_IMM(machInst, rt, rnsp, imm);
case 0x0d:
return new LDURHFP64_IMM(machInst, rt, rnsp, imm);
case 0x10:
return new STURW64_IMM(machInst, rt, rnsp, imm);
case 0x11:
return new LDURW64_IMM(machInst, rt, rnsp, imm);
case 0x12:
return new LDURSW64_IMM(machInst, rt, rnsp, imm);
case 0x14:
return new STURSFP64_IMM(machInst, rt, rnsp, imm);
case 0x15:
return new LDURSFP64_IMM(machInst, rt, rnsp, imm);
case 0x18:
return new STURX64_IMM(machInst, rt, rnsp, imm);
case 0x19:
return new LDURX64_IMM(machInst, rt, rnsp, imm);
case 0x1a:
return new PRFUM64_IMM(machInst, rt, rnsp, imm);
case 0x1c:
return new STURDFP64_IMM(machInst, rt, rnsp, imm);
case 0x1d:
return new LDURDFP64_IMM(machInst, rt, rnsp, imm);
default:
return new Unknown64(machInst);
}
}
// bit 29:27=111, 25:24=00, 21=0, 11:10=01
case 0x1:
{
RegIndex rt =
(RegIndex)(uint32_t)bits(machInst, 4, 0);
RegIndex rn =
(RegIndex)(uint32_t)bits(machInst, 9, 5);
RegIndex rnsp = makeSP(rn);
uint64_t imm = sext<9>(bits(machInst, 20, 12));
switch (switchVal) {
case 0x00:
return new STRB64_POST(machInst, rt, rnsp, imm);
case 0x01:
return new LDRB64_POST(machInst, rt, rnsp, imm);
case 0x02:
return new LDRSBX64_POST(machInst, rt, rnsp, imm);
case 0x03:
return new LDRSBW64_POST(machInst, rt, rnsp, imm);
case 0x04:
return new STRBFP64_POST(machInst, rt, rnsp, imm);
case 0x05:
return new LDRBFP64_POST(machInst, rt, rnsp, imm);
case 0x06:
return new BigFpMemPost("str", machInst, false,
rt, rnsp, imm);
case 0x07:
return new BigFpMemPost("ldr", machInst, true,
rt, rnsp, imm);
case 0x08:
return new STRH64_POST(machInst, rt, rnsp, imm);
case 0x09:
return new LDRH64_POST(machInst, rt, rnsp, imm);
case 0x0a:
return new LDRSHX64_POST(machInst, rt, rnsp, imm);
case 0x0b:
return new LDRSHW64_POST(machInst, rt, rnsp, imm);
case 0x0c:
return new STRHFP64_POST(machInst, rt, rnsp, imm);
case 0x0d:
return new LDRHFP64_POST(machInst, rt, rnsp, imm);
case 0x10:
return new STRW64_POST(machInst, rt, rnsp, imm);
case 0x11:
return new LDRW64_POST(machInst, rt, rnsp, imm);
case 0x12:
return new LDRSW64_POST(machInst, rt, rnsp, imm);
case 0x14:
return new STRSFP64_POST(machInst, rt, rnsp, imm);
case 0x15:
return new LDRSFP64_POST(machInst, rt, rnsp, imm);
case 0x18:
return new STRX64_POST(machInst, rt, rnsp, imm);
case 0x19:
return new LDRX64_POST(machInst, rt, rnsp, imm);
case 0x1c:
return new STRDFP64_POST(machInst, rt, rnsp, imm);
case 0x1d:
return new LDRDFP64_POST(machInst, rt, rnsp, imm);
default:
return new Unknown64(machInst);
}
}
case 0x2:
{
RegIndex rt =
(RegIndex)(uint32_t)bits(machInst, 4, 0);
RegIndex rn =
(RegIndex)(uint32_t)bits(machInst, 9, 5);
RegIndex rnsp = makeSP(rn);
uint64_t imm = sext<9>(bits(machInst, 20, 12));
switch (switchVal) {
case 0x00:
return new STTRB64_IMM(machInst, rt, rnsp, imm);
case 0x01:
return new LDTRB64_IMM(machInst, rt, rnsp, imm);
case 0x02:
return new LDTRSBX64_IMM(machInst, rt, rnsp, imm);
case 0x03:
return new LDTRSBW64_IMM(machInst, rt, rnsp, imm);
case 0x08:
return new STTRH64_IMM(machInst, rt, rnsp, imm);
case 0x09:
return new LDTRH64_IMM(machInst, rt, rnsp, imm);
case 0x0a:
return new LDTRSHX64_IMM(machInst, rt, rnsp, imm);
case 0x0b:
return new LDTRSHW64_IMM(machInst, rt, rnsp, imm);
case 0x10:
return new STTRW64_IMM(machInst, rt, rnsp, imm);
case 0x11:
return new LDTRW64_IMM(machInst, rt, rnsp, imm);
case 0x12:
return new LDTRSW64_IMM(machInst, rt, rnsp, imm);
case 0x18:
return new STTRX64_IMM(machInst, rt, rnsp, imm);
case 0x19:
return new LDTRX64_IMM(machInst, rt, rnsp, imm);
default:
return new Unknown64(machInst);
}
}
case 0x3:
{
RegIndex rt =
(RegIndex)(uint32_t)bits(machInst, 4, 0);
RegIndex rn =
(RegIndex)(uint32_t)bits(machInst, 9, 5);
RegIndex rnsp = makeSP(rn);
uint64_t imm = sext<9>(bits(machInst, 20, 12));
switch (switchVal) {
case 0x00:
return new STRB64_PRE(machInst, rt, rnsp, imm);
case 0x01:
return new LDRB64_PRE(machInst, rt, rnsp, imm);
case 0x02:
return new LDRSBX64_PRE(machInst, rt, rnsp, imm);
case 0x03:
return new LDRSBW64_PRE(machInst, rt, rnsp, imm);
case 0x04:
return new STRBFP64_PRE(machInst, rt, rnsp, imm);
case 0x05:
return new LDRBFP64_PRE(machInst, rt, rnsp, imm);
case 0x06:
return new BigFpMemPre("str", machInst, false,
rt, rnsp, imm);
case 0x07:
return new BigFpMemPre("ldr", machInst, true,
rt, rnsp, imm);
case 0x08:
return new STRH64_PRE(machInst, rt, rnsp, imm);
case 0x09:
return new LDRH64_PRE(machInst, rt, rnsp, imm);
case 0x0a:
return new LDRSHX64_PRE(machInst, rt, rnsp, imm);
case 0x0b:
return new LDRSHW64_PRE(machInst, rt, rnsp, imm);
case 0x0c:
return new STRHFP64_PRE(machInst, rt, rnsp, imm);
case 0x0d:
return new LDRHFP64_PRE(machInst, rt, rnsp, imm);
case 0x10:
return new STRW64_PRE(machInst, rt, rnsp, imm);
case 0x11:
return new LDRW64_PRE(machInst, rt, rnsp, imm);
case 0x12:
return new LDRSW64_PRE(machInst, rt, rnsp, imm);
case 0x14:
return new STRSFP64_PRE(machInst, rt, rnsp, imm);
case 0x15:
return new LDRSFP64_PRE(machInst, rt, rnsp, imm);
case 0x18:
return new STRX64_PRE(machInst, rt, rnsp, imm);
case 0x19:
return new LDRX64_PRE(machInst, rt, rnsp, imm);
case 0x1c:
return new STRDFP64_PRE(machInst, rt, rnsp, imm);
case 0x1d:
return new LDRDFP64_PRE(machInst, rt, rnsp, imm);
default:
return new Unknown64(machInst);
}
}
default:
GEM5_UNREACHABLE;
}
}
}
default:
GEM5_UNREACHABLE;
}
return new FailUnimplemented("Unhandled Case1", machInst);
}
}
}};
output decoder {{
namespace Aarch64
{
StaticInstPtr
decodeDataProcReg(ExtMachInst machInst)
{
uint8_t switchVal = (bits(machInst, 28) << 1) |
(bits(machInst, 24) << 0);
switch (switchVal) {
case 0x0:
{
uint8_t switchVal = (bits(machInst, 21) << 0) |
(bits(machInst, 30, 29) << 1);
ArmShiftType type = (ArmShiftType)(uint8_t)bits(machInst, 23, 22);
uint8_t imm6 = bits(machInst, 15, 10);
bool sf = bits(machInst, 31);
if (!sf && (imm6 & 0x20))
return new Unknown64(machInst);
RegIndex rd = (RegIndex)(uint8_t)bits(machInst, 4, 0);
RegIndex rdzr = makeZero(rd);
RegIndex rn = (RegIndex)(uint8_t)bits(machInst, 9, 5);
RegIndex rm = (RegIndex)(uint8_t)bits(machInst, 20, 16);
switch (switchVal) {
case 0x0:
return new AndXSReg(machInst, rdzr, rn, rm, imm6, type);
case 0x1:
return new BicXSReg(machInst, rdzr, rn, rm, imm6, type);
case 0x2:
return new OrrXSReg(machInst, rdzr, rn, rm, imm6, type);
case 0x3:
return new OrnXSReg(machInst, rdzr, rn, rm, imm6, type);
case 0x4:
return new EorXSReg(machInst, rdzr, rn, rm, imm6, type);
case 0x5:
return new EonXSReg(machInst, rdzr, rn, rm, imm6, type);
case 0x6:
return new AndXSRegCc(machInst, rdzr, rn, rm, imm6, type);
case 0x7:
return new BicXSRegCc(machInst, rdzr, rn, rm, imm6, type);
default:
GEM5_UNREACHABLE;
}
}
case 0x1:
{
uint8_t switchVal = bits(machInst, 30, 29);
if (bits(machInst, 21) == 0) {
ArmShiftType type =
(ArmShiftType)(uint8_t)bits(machInst, 23, 22);
if (type == ROR)
return new Unknown64(machInst);
uint8_t imm6 = bits(machInst, 15, 10);
if (!bits(machInst, 31) && bits(imm6, 5))
return new Unknown64(machInst);
RegIndex rd = (RegIndex)(uint8_t)bits(machInst, 4, 0);
RegIndex rdzr = makeZero(rd);
RegIndex rn = (RegIndex)(uint8_t)bits(machInst, 9, 5);
RegIndex rm = (RegIndex)(uint8_t)bits(machInst, 20, 16);
switch (switchVal) {
case 0x0:
return new AddXSReg(machInst, rdzr, rn, rm, imm6, type);
case 0x1:
return new AddXSRegCc(machInst, rdzr, rn, rm, imm6, type);
case 0x2:
return new SubXSReg(machInst, rdzr, rn, rm, imm6, type);
case 0x3:
return new SubXSRegCc(machInst, rdzr, rn, rm, imm6, type);
default:
GEM5_UNREACHABLE;
}
} else {
if (bits(machInst, 23, 22) != 0 || bits(machInst, 12, 10) > 0x4)
return new Unknown64(machInst);
ArmExtendType type =
(ArmExtendType)(uint8_t)bits(machInst, 15, 13);
uint8_t imm3 = bits(machInst, 12, 10);
RegIndex rd = (RegIndex)(uint8_t)bits(machInst, 4, 0);
RegIndex rdsp = makeSP(rd);
RegIndex rdzr = makeZero(rd);
RegIndex rn = (RegIndex)(uint8_t)bits(machInst, 9, 5);
RegIndex rnsp = makeSP(rn);
RegIndex rm = (RegIndex)(uint8_t)bits(machInst, 20, 16);
switch (switchVal) {
case 0x0:
return new AddXEReg(machInst, rdsp, rnsp, rm, type, imm3);
case 0x1:
return new AddXERegCc(machInst, rdzr, rnsp, rm, type, imm3);
case 0x2:
return new SubXEReg(machInst, rdsp, rnsp, rm, type, imm3);
case 0x3:
return new SubXERegCc(machInst, rdzr, rnsp, rm, type, imm3);
default:
GEM5_UNREACHABLE;
}
}
}
case 0x2:
{
if (bits(machInst, 21) == 1)
return new Unknown64(machInst);
RegIndex rd = (RegIndex)(uint8_t)bits(machInst, 4, 0);
RegIndex rdzr = makeZero(rd);
RegIndex rn = (RegIndex)(uint8_t)bits(machInst, 9, 5);
RegIndex rm = (RegIndex)(uint8_t)bits(machInst, 20, 16);
switch (bits(machInst, 23, 22)) {
case 0x0:
{
if (bits(machInst, 15, 10))
return new Unknown64(machInst);
uint8_t switchVal = bits(machInst, 30, 29);
switch (switchVal) {
case 0x0:
return new AdcXSReg(machInst, rdzr, rn, rm, 0, LSL);
case 0x1:
return new AdcXSRegCc(machInst, rdzr, rn, rm, 0, LSL);
case 0x2:
return new SbcXSReg(machInst, rdzr, rn, rm, 0, LSL);
case 0x3:
return new SbcXSRegCc(machInst, rdzr, rn, rm, 0, LSL);
default:
GEM5_UNREACHABLE;
}
}
case 0x1:
{
if ((bits(machInst, 4) == 1) ||
(bits(machInst, 10) == 1) ||
(bits(machInst, 29) == 0)) {
return new Unknown64(machInst);
}
ConditionCode cond =
(ConditionCode)(uint8_t)bits(machInst, 15, 12);
uint8_t flags = bits(machInst, 3, 0);
RegIndex rn = (RegIndex)(uint8_t)bits(machInst, 9, 5);
if (bits(machInst, 11) == 0) {
RegIndex rm =
(RegIndex)(uint8_t)bits(machInst, 20, 16);
if (bits(machInst, 30) == 0) {
return new CcmnReg64(machInst, rn, rm, cond, flags);
} else {
return new CcmpReg64(machInst, rn, rm, cond, flags);
}
} else {
uint8_t imm5 = bits(machInst, 20, 16);
if (bits(machInst, 30) == 0) {
return new CcmnImm64(machInst, rn, imm5, cond, flags);
} else {
return new CcmpImm64(machInst, rn, imm5, cond, flags);
}
}
}
case 0x2:
{
if (bits(machInst, 29) == 1 ||
bits(machInst, 11) == 1) {
return new Unknown64(machInst);
}
uint8_t switchVal = (bits(machInst, 10) << 0) |
(bits(machInst, 30) << 1);
RegIndex rd = (RegIndex)(uint8_t)bits(machInst, 4, 0);
RegIndex rdzr = makeZero(rd);
RegIndex rn = (RegIndex)(uint8_t)bits(machInst, 9, 5);
RegIndex rm = (RegIndex)(uint8_t)bits(machInst, 20, 16);
ConditionCode cond =
(ConditionCode)(uint8_t)bits(machInst, 15, 12);
switch (switchVal) {
case 0x0:
return new Csel64(machInst, rdzr, rn, rm, cond);
case 0x1:
return new Csinc64(machInst, rdzr, rn, rm, cond);
case 0x2:
return new Csinv64(machInst, rdzr, rn, rm, cond);
case 0x3:
return new Csneg64(machInst, rdzr, rn, rm, cond);
default:
GEM5_UNREACHABLE;
}
}
case 0x3:
if (bits(machInst, 30) == 0) {
if (bits(machInst, 29) != 0)
return new Unknown64(machInst);
uint8_t switchVal = bits(machInst, 15, 10);
switch (switchVal) {
case 0x2:
return new Udiv64(machInst, rdzr, rn, rm);
case 0x3:
return new Sdiv64(machInst, rdzr, rn, rm);
case 0x8:
return new Lslv64(machInst, rdzr, rn, rm);
case 0x9:
return new Lsrv64(machInst, rdzr, rn, rm);
case 0xa:
return new Asrv64(machInst, rdzr, rn, rm);
case 0xb:
return new Rorv64(machInst, rdzr, rn, rm);
case 0xc:
return new Pacga(machInst, rd, rn, makeSP(rm));
case 0x10:
return new Crc32b64(machInst, rdzr, rn, rm);
case 0x11:
return new Crc32h64(machInst, rdzr, rn, rm);
case 0x12:
return new Crc32w64(machInst, rdzr, rn, rm);
case 0x13:
return new Crc32x64(machInst, rdzr, rn, rm);
case 0x14:
return new Crc32cb64(machInst, rdzr, rn, rm);
case 0x15:
return new Crc32ch64(machInst, rdzr, rn, rm);
case 0x16:
return new Crc32cw64(machInst, rdzr, rn, rm);
case 0x17:
return new Crc32cx64(machInst, rdzr, rn, rm);
default:
return new Unknown64(machInst);
}
} else {
uint8_t dm = bits(machInst, 20, 14);
switch(dm){
case 0x4:
{
uint8_t zflags = bits(machInst, 13, 10);
switch (zflags) {
case 0x0:
return new Pacia(machInst, rd, makeSP(rn));
case 0x1:
return new Pacib(machInst, rd, makeSP(rn));
case 0x2:
return new Pacda(machInst, rd, makeSP(rn));
case 0x3:
return new Pacdb(machInst, rd, makeSP(rn));
case 0x4:
return new Autia(machInst, rd, makeSP(rn));
case 0x5:
return new Autib(machInst, rd, makeSP(rn));
case 0x6:
return new Autda(machInst, rd, makeSP(rn));
case 0x7:
return new Autdb(machInst, rd, makeSP(rn));
case 0x8:
if (rn == 0x1f)
return new Paciza(machInst, rd,
int_reg::Zero);
else
return new Unknown64(machInst);
case 0x9:
if (rn == 0x1f)
return new Pacizb(machInst, rd,
int_reg::Zero);
else
return new Unknown64(machInst);
case 0xa:
if (rn == 0x1f)
return new Pacdza(machInst, rd,
int_reg::Zero);
else
return new Unknown64(machInst);
case 0xb:
if (rn == 0x1f)
return new Pacdzb(machInst, rd,
int_reg::Zero);
else
return new Unknown64(machInst);
case 0xc:
if (rn == 0x1f)
return new Autiza(machInst, rd,
int_reg::Zero);
else
return new Unknown64(machInst);
case 0xd:
if (rn == 0x1f)
return new Autizb(machInst, rd,
int_reg::Zero);
else
return new Unknown64(machInst);
case 0xe:
if (rn == 0x1f)
return new Autdza(machInst, rd,
int_reg::Zero);
else
return new Unknown64(machInst);
case 0xf:
if (rn == 0x1f)
return new Autdzb(machInst, rd,
int_reg::Zero);
else
return new Unknown64(machInst);
default:
return new Unknown64(machInst);
}
}
case 0x5:
{
if (rn != 0x1f)
return new Unknown64(machInst);
bool d = bits(machInst,10);
if (d)
return new Xpacd(machInst, rd);
else
return new Xpaci(machInst, rd);
}
}
if (dm != 0 || bits(machInst, 29) != 0) {
// dm !=0 and dm != 0x1
return new Unknown64(machInst);
}
uint8_t switchVal = bits(machInst, 15, 10);
switch (switchVal) {
case 0x0:
return new Rbit64(machInst, rdzr, rn);
case 0x1:
return new Rev1664(machInst, rdzr, rn);
case 0x2:
if (bits(machInst, 31) == 0)
return new Rev64(machInst, rdzr, rn);
else
return new Rev3264(machInst, rdzr, rn);
case 0x3:
if (bits(machInst, 31) != 1)
return new Unknown64(machInst);
return new Rev64(machInst, rdzr, rn);
case 0x4:
return new Clz64(machInst, rdzr, rn);
case 0x5:
return new Cls64(machInst, rdzr, rn);
default:
return new Unknown64(machInst);
}
}
default:
GEM5_UNREACHABLE;
}
}
case 0x3:
{
if (bits(machInst, 30, 29) != 0x0 ||
(bits(machInst, 23, 21) != 0 && bits(machInst, 31) == 0))
return new Unknown64(machInst);
RegIndex rd = (RegIndex)(uint8_t)bits(machInst, 4, 0);
RegIndex rdzr = makeZero(rd);
RegIndex rn = (RegIndex)(uint8_t)bits(machInst, 9, 5);
RegIndex ra = (RegIndex)(uint8_t)bits(machInst, 14, 10);
RegIndex rm = (RegIndex)(uint8_t)bits(machInst, 20, 16);
switch (bits(machInst, 23, 21)) {
case 0x0:
if (bits(machInst, 15) == 0)
return new Madd64(machInst, rdzr, ra, rn, rm);
else
return new Msub64(machInst, rdzr, ra, rn, rm);
case 0x1:
if (bits(machInst, 15) == 0)
return new Smaddl64(machInst, rdzr, ra, rn, rm);
else
return new Smsubl64(machInst, rdzr, ra, rn, rm);
case 0x2:
if (bits(machInst, 15) != 0)
return new Unknown64(machInst);
return new Smulh64(machInst, rdzr, rn, rm);
case 0x5:
if (bits(machInst, 15) == 0)
return new Umaddl64(machInst, rdzr, ra, rn, rm);
else
return new Umsubl64(machInst, rdzr, ra, rn, rm);
case 0x6:
if (bits(machInst, 15) != 0)
return new Unknown64(machInst);
return new Umulh64(machInst, rdzr, rn, rm);
default:
return new Unknown64(machInst);
}
}
default:
GEM5_UNREACHABLE;
}
return new FailUnimplemented("Unhandled Case2", machInst);
}
}
}};
output decoder {{
namespace Aarch64
{
template <typename DecoderFeatures>
StaticInstPtr
decodeAdvSIMD(ExtMachInst machInst)
{
if (bits(machInst, 24) == 1) {
if (bits(machInst, 10) == 0) {
return decodeNeonIndexedElem<DecoderFeatures>(machInst);
} else if (bits(machInst, 23) == 1) {
return new Unknown64(machInst);
} else {
if (bits(machInst, 22, 19)) {
return decodeNeonShiftByImm(machInst);
} else {
return decodeNeonModImm(machInst);
}
}
} else if (bits(machInst, 21) == 1) {
if (bits(machInst, 10) == 1) {
return decodeNeon3Same<DecoderFeatures>(machInst);
} else if (bits(machInst, 11) == 0) {
return decodeNeon3Diff(machInst);
} else if (bits(machInst, 20, 17) == 0x0) {
return decodeNeon2RegMisc(machInst);
} else if (bits(machInst, 20, 17) == 0x4) {
return decodeCryptoAES(machInst);
} else if (bits(machInst, 20, 17) == 0x8) {
return decodeNeonAcrossLanes(machInst);
} else {
return new Unknown64(machInst);
}
} else if (bits(machInst, 15) == 1) {
return decodeNeon3SameExtra<DecoderFeatures>(machInst);
} else if (bits(machInst, 10) == 1) {
if (bits(machInst, 23, 22))
return new Unknown64(machInst);
return decodeNeonCopy(machInst);
} else if (bits(machInst, 29) == 1) {
return decodeNeonExt(machInst);
} else if (bits(machInst, 11) == 1) {
return decodeNeonZipUzpTrn(machInst);
} else if (bits(machInst, 23, 22) == 0x0) {
return decodeNeonTblTbx(machInst);
} else {
return new Unknown64(machInst);
}
return new FailUnimplemented("Unhandled Case3", machInst);
}
}
}};
output decoder {{
namespace Aarch64
{
StaticInstPtr
// bit 30=0, 28:25=1111
decodeFp(ExtMachInst machInst)
{
if (bits(machInst, 24) == 1) {
if (bits(machInst, 31) || bits(machInst, 29))
return new Unknown64(machInst);
RegIndex rd = (RegIndex)(uint32_t)bits(machInst, 4, 0);
RegIndex rn = (RegIndex)(uint32_t)bits(machInst, 9, 5);
RegIndex rm = (RegIndex)(uint32_t)bits(machInst, 20, 16);
RegIndex ra = (RegIndex)(uint32_t)bits(machInst, 14, 10);
uint8_t switchVal = (bits(machInst, 23, 21) << 1) |
(bits(machInst, 15) << 0);
switch (switchVal) {
case 0x0: // FMADD Sd = Sa + Sn*Sm
return new FMAddS(machInst, rd, rn, rm, ra);
case 0x1: // FMSUB Sd = Sa + (-Sn)*Sm
return new FMSubS(machInst, rd, rn, rm, ra);
case 0x2: // FNMADD Sd = (-Sa) + (-Sn)*Sm
return new FNMAddS(machInst, rd, rn, rm, ra);
case 0x3: // FNMSUB Sd = (-Sa) + Sn*Sm
return new FNMSubS(machInst, rd, rn, rm, ra);
case 0x4: // FMADD Dd = Da + Dn*Dm
return new FMAddD(machInst, rd, rn, rm, ra);
case 0x5: // FMSUB Dd = Da + (-Dn)*Dm
return new FMSubD(machInst, rd, rn, rm, ra);
case 0x6: // FNMADD Dd = (-Da) + (-Dn)*Dm
return new FNMAddD(machInst, rd, rn, rm, ra);
case 0x7: // FNMSUB Dd = (-Da) + Dn*Dm
return new FNMSubD(machInst, rd, rn, rm, ra);
default:
return new Unknown64(machInst);
}
} else if (bits(machInst, 21) == 0) {
bool s = bits(machInst, 29);
if (s)
return new Unknown64(machInst);
uint8_t switchVal = bits(machInst, 20, 16);
uint8_t type = bits(machInst, 23, 22);
uint8_t scale = bits(machInst, 15, 10);
RegIndex rd = (RegIndex)(uint32_t)bits(machInst, 4, 0);
RegIndex rn = (RegIndex)(uint32_t)bits(machInst, 9, 5);
if (bits(machInst, 18, 17) == 3 && scale != 0)
return new Unknown64(machInst);
// 30:24=0011110, 21=0
switch (switchVal) {
case 0x00:
return new FailUnimplemented("fcvtns", machInst);
case 0x01:
return new FailUnimplemented("fcvtnu", machInst);
case 0x02:
switch ( (bits(machInst, 31) << 2) | type ) {
case 0: // SCVTF Sd = convertFromInt(Wn/(2^fbits))
return new FcvtSFixedFpSW(machInst, rd, rn, scale);
case 1: // SCVTF Dd = convertFromInt(Wn/(2^fbits))
return new FcvtSFixedFpDW(machInst, rd, rn, scale);
case 4: // SCVTF Sd = convertFromInt(Xn/(2^fbits))
return new FcvtSFixedFpSX(machInst, rd, rn, scale);
case 5: // SCVTF Dd = convertFromInt(Xn/(2^fbits))
return new FcvtSFixedFpDX(machInst, rd, rn, scale);
default:
return new Unknown64(machInst);
}
case 0x03:
switch ( (bits(machInst, 31) << 2) | type ) {
case 0: // UCVTF Sd = convertFromInt(Wn/(2^fbits))
return new FcvtUFixedFpSW(machInst, rd, rn, scale);
case 1: // UCVTF Dd = convertFromInt(Wn/(2^fbits))
return new FcvtUFixedFpDW(machInst, rd, rn, scale);
case 4: // UCVTF Sd = convertFromInt(Xn/(2^fbits))
return new FcvtUFixedFpSX(machInst, rd, rn, scale);
case 5: // UCVTF Dd = convertFromInt(Xn/(2^fbits))
return new FcvtUFixedFpDX(machInst, rd, rn, scale);
default:
return new Unknown64(machInst);
}
case 0x04:
return new FailUnimplemented("fcvtas", machInst);
case 0x05:
return new FailUnimplemented("fcvtau", machInst);
case 0x08:
return new FailUnimplemented("fcvtps", machInst);
case 0x09:
return new FailUnimplemented("fcvtpu", machInst);
case 0x0e:
return new FailUnimplemented("fmov elem. to 64", machInst);
case 0x0f:
return new FailUnimplemented("fmov 64 bit", machInst);
case 0x10:
return new FailUnimplemented("fcvtms", machInst);
case 0x11:
return new FailUnimplemented("fcvtmu", machInst);
case 0x18:
switch ( (bits(machInst, 31) << 2) | type ) {
case 0: // FCVTZS Wd = convertToIntExactTowardZero(Sn*(2^fbits))
return new FcvtFpSFixedSW(machInst, rd, rn, scale);
case 1: // FCVTZS Wd = convertToIntExactTowardZero(Dn*(2^fbits))
return new FcvtFpSFixedDW(machInst, rd, rn, scale);
case 4: // FCVTZS Xd = convertToIntExactTowardZero(Sn*(2^fbits))
return new FcvtFpSFixedSX(machInst, rd, rn, scale);
case 5: // FCVTZS Xd = convertToIntExactTowardZero(Dn*(2^fbits))
return new FcvtFpSFixedDX(machInst, rd, rn, scale);
default:
return new Unknown64(machInst);
}
case 0x19:
switch ( (bits(machInst, 31) << 2) | type ) {
case 0: // FCVTZU Wd = convertToIntExactTowardZero(Sn*(2^fbits))
return new FcvtFpUFixedSW(machInst, rd, rn, scale);
case 1: // FCVTZU Wd = convertToIntExactTowardZero(Dn*(2^fbits))
return new FcvtFpUFixedDW(machInst, rd, rn, scale);
case 4: // FCVTZU Xd = convertToIntExactTowardZero(Sn*(2^fbits))
return new FcvtFpUFixedSX(machInst, rd, rn, scale);
case 5: // FCVTZU Xd = convertToIntExactTowardZero(Dn*(2^fbits))
return new FcvtFpUFixedDX(machInst, rd, rn, scale);
default:
return new Unknown64(machInst);
}
default:
return new Unknown64(machInst);
}
} else {
// 30=0, 28:24=11110, 21=1
uint8_t type = bits(machInst, 23, 22);
uint8_t imm8 = bits(machInst, 20, 13);
RegIndex rd = (RegIndex)(uint32_t)bits(machInst, 4, 0);
RegIndex rn = (RegIndex)(uint32_t)bits(machInst, 9, 5);
switch (bits(machInst, 11, 10)) {
case 0x0:
if (bits(machInst, 12) == 1) {
if (bits(machInst, 31) ||
bits(machInst, 29) ||
bits(machInst, 9, 5)) {
return new Unknown64(machInst);
}
// 31:29=000, 28:24=11110, 21=1, 12:10=100
if (type == 0) {
// FMOV S[d] = imm8<7>:NOT(imm8<6>):Replicate(imm8<6>,5)
// :imm8<5:0>:Zeros(19)
uint32_t imm = vfp_modified_imm(imm8,
FpDataType::Fp32);
return new FmovImmS(machInst, rd, imm);
} else if (type == 1) {
// FMOV D[d] = imm8<7>:NOT(imm8<6>):Replicate(imm8<6>,8)
// :imm8<5:0>:Zeros(48)
uint64_t imm = vfp_modified_imm(imm8,
FpDataType::Fp64);
return new FmovImmD(machInst, rd, imm);
} else {
return new Unknown64(machInst);
}
} else if (bits(machInst, 13) == 1) {
if (bits(machInst, 31) ||
bits(machInst, 29) ||
bits(machInst, 15, 14) ||
bits(machInst, 23) ||
bits(machInst, 2, 0)) {
return new Unknown64(machInst);
}
uint8_t switchVal = (bits(machInst, 4, 3) << 0) |
(bits(machInst, 22) << 2);
RegIndex rm = (RegIndex)(uint32_t)
bits(machInst, 20, 16);
// 28:23=000111100, 21=1, 15:10=001000, 2:0=000
switch (switchVal) {
case 0x0:
// FCMP flags = compareQuiet(Sn,Sm)
return new FCmpRegS(machInst, rn, rm);
case 0x1:
// FCMP flags = compareQuiet(Sn,0.0)
return new FCmpImmS(machInst, rn, 0);
case 0x2:
// FCMPE flags = compareSignaling(Sn,Sm)
return new FCmpERegS(machInst, rn, rm);
case 0x3:
// FCMPE flags = compareSignaling(Sn,0.0)
return new FCmpEImmS(machInst, rn, 0);
case 0x4:
// FCMP flags = compareQuiet(Dn,Dm)
return new FCmpRegD(machInst, rn, rm);
case 0x5:
// FCMP flags = compareQuiet(Dn,0.0)
return new FCmpImmD(machInst, rn, 0);
case 0x6:
// FCMPE flags = compareSignaling(Dn,Dm)
return new FCmpERegD(machInst, rn, rm);
case 0x7:
// FCMPE flags = compareSignaling(Dn,0.0)
return new FCmpEImmD(machInst, rn, 0);
default:
return new Unknown64(machInst);
}
} else if (bits(machInst, 14) == 1) {
if (bits(machInst, 31) || bits(machInst, 29))
return new Unknown64(machInst);
uint8_t opcode = bits(machInst, 20, 15);
// Bits 31:24=00011110, 21=1, 14:10=10000
switch (opcode) {
case 0x0:
if (type == 0)
// FMOV Sd = Sn
return new FmovRegS(machInst, rd, rn);
else if (type == 1)
// FMOV Dd = Dn
return new FmovRegD(machInst, rd, rn);
break;
case 0x1:
if (type == 0)
// FABS Sd = abs(Sn)
return new FAbsS(machInst, rd, rn);
else if (type == 1)
// FABS Dd = abs(Dn)
return new FAbsD(machInst, rd, rn);
break;
case 0x2:
if (type == 0)
// FNEG Sd = -Sn
return new FNegS(machInst, rd, rn);
else if (type == 1)
// FNEG Dd = -Dn
return new FNegD(machInst, rd, rn);
break;
case 0x3:
if (type == 0)
// FSQRT Sd = sqrt(Sn)
return new FSqrtS(machInst, rd, rn);
else if (type == 1)
// FSQRT Dd = sqrt(Dn)
return new FSqrtD(machInst, rd, rn);
break;
case 0x4:
if (type == 1)
// FCVT Sd = convertFormat(Dn)
return new FcvtFpDFpS(machInst, rd, rn);
else if (type == 3)
// FCVT Sd = convertFormat(Hn)
return new FcvtFpHFpS(machInst, rd, rn);
break;
case 0x5:
if (type == 0)
// FCVT Dd = convertFormat(Sn)
return new FCvtFpSFpD(machInst, rd, rn);
else if (type == 3)
// FCVT Dd = convertFormat(Hn)
return new FcvtFpHFpD(machInst, rd, rn);
break;
case 0x7:
if (type == 0)
// FCVT Hd = convertFormat(Sn)
return new FcvtFpSFpH(machInst, rd, rn);
else if (type == 1)
// FCVT Hd = convertFormat(Dn)
return new FcvtFpDFpH(machInst, rd, rn);
break;
case 0x8:
if (type == 0) // FRINTN Sd = roundToIntegralTiesToEven(Sn)
return new FRIntNS(machInst, rd, rn);
else if (type == 1) // FRINTN Dd = roundToIntegralTiesToEven(Dn)
return new FRIntND(machInst, rd, rn);
break;
case 0x9:
if (type == 0) // FRINTP Sd = roundToIntegralTowardPlusInf(Sn)
return new FRIntPS(machInst, rd, rn);
else if (type == 1) // FRINTP Dd = roundToIntegralTowardPlusInf(Dn)
return new FRIntPD(machInst, rd, rn);
break;
case 0xa:
if (type == 0) // FRINTM Sd = roundToIntegralTowardMinusInf(Sn)
return new FRIntMS(machInst, rd, rn);
else if (type == 1) // FRINTM Dd = roundToIntegralTowardMinusInf(Dn)
return new FRIntMD(machInst, rd, rn);
break;
case 0xb:
if (type == 0) // FRINTZ Sd = roundToIntegralTowardZero(Sn)
return new FRIntZS(machInst, rd, rn);
else if (type == 1) // FRINTZ Dd = roundToIntegralTowardZero(Dn)
return new FRIntZD(machInst, rd, rn);
break;
case 0xc:
if (type == 0) // FRINTA Sd = roundToIntegralTiesToAway(Sn)
return new FRIntAS(machInst, rd, rn);
else if (type == 1) // FRINTA Dd = roundToIntegralTiesToAway(Dn)
return new FRIntAD(machInst, rd, rn);
break;
case 0xe:
if (type == 0) // FRINTX Sd = roundToIntegralExact(Sn)
return new FRIntXS(machInst, rd, rn);
else if (type == 1) // FRINTX Dd = roundToIntegralExact(Dn)
return new FRIntXD(machInst, rd, rn);
break;
case 0xf:
if (type == 0) // FRINTI Sd = roundToIntegral(Sn)
return new FRIntIS(machInst, rd, rn);
else if (type == 1) // FRINTI Dd = roundToIntegral(Dn)
return new FRIntID(machInst, rd, rn);
break;
default:
return new Unknown64(machInst);
}
return new Unknown64(machInst);
} else if (bits(machInst, 15) == 1) {
return new Unknown64(machInst);
} else {
if (bits(machInst, 29))
return new Unknown64(machInst);
uint8_t rmode = bits(machInst, 20, 19);
uint8_t switchVal1 = bits(machInst, 18, 16);
uint8_t switchVal2 = (type << 1) | bits(machInst, 31);
// 30:24=0011110, 21=1, 15:10=000000
switch (switchVal1) {
case 0x0:
switch ((switchVal2 << 2) | rmode) {
case 0x0: //FCVTNS Wd = convertToIntExactTiesToEven(Sn)
return new FcvtFpSIntWSN(machInst, rd, rn);
case 0x1: //FCVTPS Wd = convertToIntExactTowardPlusInf(Sn)
return new FcvtFpSIntWSP(machInst, rd, rn);
case 0x2: //FCVTMS Wd = convertToIntExactTowardMinusInf(Sn)
return new FcvtFpSIntWSM(machInst, rd, rn);
case 0x3: //FCVTZS Wd = convertToIntExactTowardZero(Sn)
return new FcvtFpSIntWSZ(machInst, rd, rn);
case 0x4: //FCVTNS Xd = convertToIntExactTiesToEven(Sn)
return new FcvtFpSIntXSN(machInst, rd, rn);
case 0x5: //FCVTPS Xd = convertToIntExactTowardPlusInf(Sn)
return new FcvtFpSIntXSP(machInst, rd, rn);
case 0x6: //FCVTMS Xd = convertToIntExactTowardMinusInf(Sn)
return new FcvtFpSIntXSM(machInst, rd, rn);
case 0x7: //FCVTZS Xd = convertToIntExactTowardZero(Sn)
return new FcvtFpSIntXSZ(machInst, rd, rn);
case 0x8: //FCVTNS Wd = convertToIntExactTiesToEven(Dn)
return new FcvtFpSIntWDN(machInst, rd, rn);
case 0x9: //FCVTPS Wd = convertToIntExactTowardPlusInf(Dn)
return new FcvtFpSIntWDP(machInst, rd, rn);
case 0xA: //FCVTMS Wd = convertToIntExactTowardMinusInf(Dn)
return new FcvtFpSIntWDM(machInst, rd, rn);
case 0xB: //FCVTZS Wd = convertToIntExactTowardZero(Dn)
return new FcvtFpSIntWDZ(machInst, rd, rn);
case 0xC: //FCVTNS Xd = convertToIntExactTiesToEven(Dn)
return new FcvtFpSIntXDN(machInst, rd, rn);
case 0xD: //FCVTPS Xd = convertToIntExactTowardPlusInf(Dn)
return new FcvtFpSIntXDP(machInst, rd, rn);
case 0xE: //FCVTMS Xd = convertToIntExactTowardMinusInf(Dn)
return new FcvtFpSIntXDM(machInst, rd, rn);
case 0xF: //FCVTZS Xd = convertToIntExactTowardZero(Dn)
return new FcvtFpSIntXDZ(machInst, rd, rn);
default:
return new Unknown64(machInst);
}
case 0x1:
switch ((switchVal2 << 2) | rmode) {
case 0x0: //FCVTNU Wd = convertToIntExactTiesToEven(Sn)
return new FcvtFpUIntWSN(machInst, rd, rn);
case 0x1: //FCVTPU Wd = convertToIntExactTowardPlusInf(Sn)
return new FcvtFpUIntWSP(machInst, rd, rn);
case 0x2: //FCVTMU Wd = convertToIntExactTowardMinusInf(Sn)
return new FcvtFpUIntWSM(machInst, rd, rn);
case 0x3: //FCVTZU Wd = convertToIntExactTowardZero(Sn)
return new FcvtFpUIntWSZ(machInst, rd, rn);
case 0x4: //FCVTNU Xd = convertToIntExactTiesToEven(Sn)
return new FcvtFpUIntXSN(machInst, rd, rn);
case 0x5: //FCVTPU Xd = convertToIntExactTowardPlusInf(Sn)
return new FcvtFpUIntXSP(machInst, rd, rn);
case 0x6: //FCVTMU Xd = convertToIntExactTowardMinusInf(Sn)
return new FcvtFpUIntXSM(machInst, rd, rn);
case 0x7: //FCVTZU Xd = convertToIntExactTowardZero(Sn)
return new FcvtFpUIntXSZ(machInst, rd, rn);
case 0x8: //FCVTNU Wd = convertToIntExactTiesToEven(Dn)
return new FcvtFpUIntWDN(machInst, rd, rn);
case 0x9: //FCVTPU Wd = convertToIntExactTowardPlusInf(Dn)
return new FcvtFpUIntWDP(machInst, rd, rn);
case 0xA: //FCVTMU Wd = convertToIntExactTowardMinusInf(Dn)
return new FcvtFpUIntWDM(machInst, rd, rn);
case 0xB: //FCVTZU Wd = convertToIntExactTowardZero(Dn)
return new FcvtFpUIntWDZ(machInst, rd, rn);
case 0xC: //FCVTNU Xd = convertToIntExactTiesToEven(Dn)
return new FcvtFpUIntXDN(machInst, rd, rn);
case 0xD: //FCVTPU Xd = convertToIntExactTowardPlusInf(Dn)
return new FcvtFpUIntXDP(machInst, rd, rn);
case 0xE: //FCVTMU Xd = convertToIntExactTowardMinusInf(Dn)
return new FcvtFpUIntXDM(machInst, rd, rn);
case 0xF: //FCVTZU Xd = convertToIntExactTowardZero(Dn)
return new FcvtFpUIntXDZ(machInst, rd, rn);
default:
return new Unknown64(machInst);
}
case 0x2:
if (rmode != 0)
return new Unknown64(machInst);
switch (switchVal2) {
case 0: // SCVTF Sd = convertFromInt(Wn)
return new FcvtWSIntFpS(machInst, rd, rn);
case 1: // SCVTF Sd = convertFromInt(Xn)
return new FcvtXSIntFpS(machInst, rd, rn);
case 2: // SCVTF Dd = convertFromInt(Wn)
return new FcvtWSIntFpD(machInst, rd, rn);
case 3: // SCVTF Dd = convertFromInt(Xn)
return new FcvtXSIntFpD(machInst, rd, rn);
default:
return new Unknown64(machInst);
}
case 0x3:
switch (switchVal2) {
case 0: // UCVTF Sd = convertFromInt(Wn)
return new FcvtWUIntFpS(machInst, rd, rn);
case 1: // UCVTF Sd = convertFromInt(Xn)
return new FcvtXUIntFpS(machInst, rd, rn);
case 2: // UCVTF Dd = convertFromInt(Wn)
return new FcvtWUIntFpD(machInst, rd, rn);
case 3: // UCVTF Dd = convertFromInt(Xn)
return new FcvtXUIntFpD(machInst, rd, rn);
default:
return new Unknown64(machInst);
}
case 0x4:
if (rmode != 0)
return new Unknown64(machInst);
switch (switchVal2) {
case 0: // FCVTAS Wd = convertToIntExactTiesToAway(Sn)
return new FcvtFpSIntWSA(machInst, rd, rn);
case 1: // FCVTAS Xd = convertToIntExactTiesToAway(Sn)
return new FcvtFpSIntXSA(machInst, rd, rn);
case 2: // FCVTAS Wd = convertToIntExactTiesToAway(Dn)
return new FcvtFpSIntWDA(machInst, rd, rn);
case 3: // FCVTAS Wd = convertToIntExactTiesToAway(Dn)
return new FcvtFpSIntXDA(machInst, rd, rn);
default:
return new Unknown64(machInst);
}
case 0x5:
switch (switchVal2) {
case 0: // FCVTAU Wd = convertToIntExactTiesToAway(Sn)
return new FcvtFpUIntWSA(machInst, rd, rn);
case 1: // FCVTAU Xd = convertToIntExactTiesToAway(Sn)
return new FcvtFpUIntXSA(machInst, rd, rn);
case 2: // FCVTAU Wd = convertToIntExactTiesToAway(Dn)
return new FcvtFpUIntWDA(machInst, rd, rn);
case 3: // FCVTAU Xd = convertToIntExactTiesToAway(Dn)
return new FcvtFpUIntXDA(machInst, rd, rn);
default:
return new Unknown64(machInst);
}
case 0x06:
switch (switchVal2) {
case 0: // FMOV Wd = Sn
if (rmode != 0)
return new Unknown64(machInst);
return new FmovRegCoreW(machInst, rd, rn);
case 2:
return new FJcvtFpSFixedDW(machInst, rd, rn);
case 3: // FMOV Xd = Dn
if (rmode != 0)
return new Unknown64(machInst);
return new FmovRegCoreX(machInst, rd, rn);
case 5: // FMOV Xd = Vn<127:64>
if (rmode != 1)
return new Unknown64(machInst);
return new FmovURegCoreX(machInst, rd, rn);
default:
return new Unknown64(machInst);
}
break;
case 0x07:
switch (switchVal2) {
case 0: // FMOV Sd = Wn
if (rmode != 0)
return new Unknown64(machInst);
return new FmovCoreRegW(machInst, rd, rn);
case 3: // FMOV Xd = Dn
if (rmode != 0)
return new Unknown64(machInst);
return new FmovCoreRegX(machInst, rd, rn);
case 5: // FMOV Xd = Vn<127:64>
if (rmode != 1)
return new Unknown64(machInst);
return new FmovUCoreRegX(machInst, rd, rn);
default:
return new Unknown64(machInst);
}
break;
default: // Warning! missing cases in switch statement above, that still need to be added
return new Unknown64(machInst);
}
}
GEM5_UNREACHABLE;
case 0x1:
{
if (bits(machInst, 31) ||
bits(machInst, 29) ||
bits(machInst, 23)) {
return new Unknown64(machInst);
}
RegIndex rm = (RegIndex)(uint32_t) bits(machInst, 20, 16);
RegIndex rn = (RegIndex)(uint32_t) bits(machInst, 9, 5);
uint8_t imm = (RegIndex)(uint32_t) bits(machInst, 3, 0);
ConditionCode cond =
(ConditionCode)(uint8_t)(bits(machInst, 15, 12));
uint8_t switchVal = (bits(machInst, 4) << 0) |
(bits(machInst, 22) << 1);
// 31:23=000111100, 21=1, 11:10=01
switch (switchVal) {
case 0x0:
// FCCMP flags = if cond the compareQuiet(Sn,Sm) else #nzcv
return new FCCmpRegS(machInst, rn, rm, cond, imm);
case 0x1:
// FCCMP flags = if cond then compareSignaling(Sn,Sm)
// else #nzcv
return new FCCmpERegS(machInst, rn, rm, cond, imm);
case 0x2:
// FCCMP flags = if cond then compareQuiet(Dn,Dm) else #nzcv
return new FCCmpRegD(machInst, rn, rm, cond, imm);
case 0x3:
// FCCMP flags = if cond then compareSignaling(Dn,Dm)
// else #nzcv
return new FCCmpERegD(machInst, rn, rm, cond, imm);
default:
return new Unknown64(machInst);
}
}
case 0x2:
{
if (bits(machInst, 31) ||
bits(machInst, 29) ||
bits(machInst, 23)) {
return new Unknown64(machInst);
}
RegIndex rd = (RegIndex)(uint32_t)bits(machInst, 4, 0);
RegIndex rn = (RegIndex)(uint32_t)bits(machInst, 9, 5);
RegIndex rm = (RegIndex)(uint32_t)bits(machInst, 20, 16);
uint8_t switchVal = (bits(machInst, 15, 12) << 0) |
(bits(machInst, 22) << 4);
switch (switchVal) {
case 0x00: // FMUL Sd = Sn * Sm
return new FMulS(machInst, rd, rn, rm);
case 0x10: // FMUL Dd = Dn * Dm
return new FMulD(machInst, rd, rn, rm);
case 0x01: // FDIV Sd = Sn / Sm
return new FDivS(machInst, rd, rn, rm);
case 0x11: // FDIV Dd = Dn / Dm
return new FDivD(machInst, rd, rn, rm);
case 0x02: // FADD Sd = Sn + Sm
return new FAddS(machInst, rd, rn, rm);
case 0x12: // FADD Dd = Dn + Dm
return new FAddD(machInst, rd, rn, rm);
case 0x03: // FSUB Sd = Sn - Sm
return new FSubS(machInst, rd, rn, rm);
case 0x13: // FSUB Dd = Dn - Dm
return new FSubD(machInst, rd, rn, rm);
case 0x04: // FMAX Sd = max(Sn, Sm)
return new FMaxS(machInst, rd, rn, rm);
case 0x14: // FMAX Dd = max(Dn, Dm)
return new FMaxD(machInst, rd, rn, rm);
case 0x05: // FMIN Sd = min(Sn, Sm)
return new FMinS(machInst, rd, rn, rm);
case 0x15: // FMIN Dd = min(Dn, Dm)
return new FMinD(machInst, rd, rn, rm);
case 0x06: // FMAXNM Sd = maxNum(Sn, Sm)
return new FMaxNMS(machInst, rd, rn, rm);
case 0x16: // FMAXNM Dd = maxNum(Dn, Dm)
return new FMaxNMD(machInst, rd, rn, rm);
case 0x07: // FMINNM Sd = minNum(Sn, Sm)
return new FMinNMS(machInst, rd, rn, rm);
case 0x17: // FMINNM Dd = minNum(Dn, Dm)
return new FMinNMD(machInst, rd, rn, rm);
case 0x08: // FNMUL Sd = -(Sn * Sm)
return new FNMulS(machInst, rd, rn, rm);
case 0x18: // FNMUL Dd = -(Dn * Dm)
return new FNMulD(machInst, rd, rn, rm);
default:
return new Unknown64(machInst);
}
}
case 0x3:
{
if (bits(machInst, 31) || bits(machInst, 29))
return new Unknown64(machInst);
uint8_t type = bits(machInst, 23, 22);
RegIndex rd = (RegIndex)(uint32_t)bits(machInst, 4, 0);
RegIndex rn = (RegIndex)(uint32_t)bits(machInst, 9, 5);
RegIndex rm = (RegIndex)(uint32_t)bits(machInst, 20, 16);
ConditionCode cond =
(ConditionCode)(uint8_t)(bits(machInst, 15, 12));
if (type == 0) // FCSEL Sd = if cond then Sn else Sm
return new FCSelS(machInst, rd, rn, rm, cond);
else if (type == 1) // FCSEL Dd = if cond then Dn else Dm
return new FCSelD(machInst, rd, rn, rm, cond);
else
return new Unknown64(machInst);
}
default:
GEM5_UNREACHABLE;
}
}
GEM5_UNREACHABLE;
}
}
}};
output decoder {{
namespace Aarch64
{
StaticInstPtr
decodeAdvSIMDScalar(ExtMachInst machInst)
{
if (bits(machInst, 24) == 1) {
if (bits(machInst, 10) == 0) {
return decodeNeonScIndexedElem(machInst);
} else if (bits(machInst, 23) == 0) {
return decodeNeonScShiftByImm(machInst);
}
} else if (bits(machInst, 21) == 1) {
if (bits(machInst, 10) == 1) {
return decodeNeonSc3Same(machInst);
} else if (bits(machInst, 11) == 0) {
return decodeNeonSc3Diff(machInst);
} else if (bits(machInst, 20, 17) == 0x0) {
return decodeNeonSc2RegMisc(machInst);
} else if (bits(machInst, 20, 17) == 0x4) {
return decodeCryptoTwoRegSHA(machInst);
} else if (bits(machInst, 20, 17) == 0x8) {
return decodeNeonScPwise(machInst);
} else {
return new Unknown64(machInst);
}
} else if (bits(machInst, 15) && bits(machInst, 10) == 1) {
return decodeNeonSc3SameExtra(machInst);
} else if (bits(machInst, 23, 22) == 0 &&
bits(machInst, 15) == 0) {
if (bits(machInst, 10) == 1) {
return decodeNeonScCopy(machInst);
} else {
return decodeCryptoThreeRegSHA(machInst);
}
} else {
return new Unknown64(machInst);
}
return new FailUnimplemented("Unhandled Case6", machInst);
}
}
}};
output decoder {{
namespace Aarch64
{
template <typename DecoderFeatures>
StaticInstPtr
decodeFpAdvSIMD(ExtMachInst machInst)
{
if (bits(machInst, 28) == 0) {
if (bits(machInst, 31) == 0) {
return decodeAdvSIMD<DecoderFeatures>(machInst);
} else {
return new Unknown64(machInst);
}
} else if (bits(machInst, 30) == 0) {
return decodeFp(machInst);
} else if (bits(machInst, 31) == 0) {
return decodeAdvSIMDScalar(machInst);
} else {
return new Unknown64(machInst);
}
}
}
}};
let {{
decoder_output ='''
namespace Aarch64
{'''
for decoderFlavor, type_dict in decoders.items():
decoder_output +='''
template StaticInstPtr decodeFpAdvSIMD<%(df)sDecoder>(ExtMachInst machInst);
''' % { "df" : decoderFlavor }
decoder_output +='''
}'''
}};
def format Aarch64() {{
decode_block = '''
{
using namespace Aarch64;
if (bits(machInst, 27) == 0x0) {
if (bits(machInst, 28) == 0x0) {
if (bits(machInst, 26) == 0x1) {
if (bits(machInst, 31) == 0x0) {
if (bits(machInst, 25) == 0x1) {
return new Unknown64(machInst);
}
switch (bits(machInst, 30, 29)) {
case 0x0:
case 0x1:
case 0x2:
return decodeSveInt(machInst);
case 0x3:
return decodeSveFp(machInst);
}
} else {
return decodeSveMem(machInst);
}
} else {
if ((bits(machInst, 25) == 0x0) && \
(bits(machInst, 31) == 0x1)) {
// bit 31:25=1xx0000
return decodeSmeInst(machInst);
} else {
return new Unknown64(machInst);
}
}
} else if (bits(machInst, 26) == 0)
// bit 28:26=100
return decodeDataProcImm(machInst);
else
// bit 28:26=101
return decodeBranchExcSys(*this, machInst);
} else if (bits(machInst, 25) == 0) {
// bit 27=1, 25=0
return decodeLoadsStores(machInst);
} else if (bits(machInst, 26) == 0) {
// bit 27:25=101
return decodeDataProcReg(machInst);
} else if (bits(machInst, 24) == 1 &&
bits(machInst, 31, 28) == 0xF) {
return new Gem5Op64(machInst);
} else {
// bit 27:25=111
switch(decoderFlavor){
default:
return decodeFpAdvSIMD<GenericDecoder>(machInst);
}
}
}
'''
}};
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