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arch-riscv: Added the Zbs bitmanip instructions

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Added the bclr, bclri, bext, bexti, binv, binvi, bset, bseti
instructions.

Changes based on spec:
https://github.com/riscv/riscv-bitmanip/releases/download/1.0.0/bitmanip-1.0.0.pdf

Change-Id: I126d659d973b250b642bd56b3b149f0ee6a3323e
Signed-off-by: Jerin Joy <joy@rivosinc.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/58632
Reviewed-by: Luming Wang <wlm199558@126.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
This commit is contained in:
Jerin Joy
2022-04-01 11:55:46 -07:00
parent df886bc8c1
commit 70fd98e807
1 changed files with 37 additions and 3 deletions
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40
src/arch/riscv/isa/decoder.isa
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@@ -432,9 +432,23 @@ decode QUADRANT default Unknown::unknown() {
0x04: decode FUNCT3 {
0x1: decode FS3 {
0x00: IOp::slli({{
Rd = Rs1 << imm;
}}, imm_type = uint64_t, imm_code = {{ imm = SHAMT6; }});
format IOp {
0x00: slli({{
Rd = Rs1 << imm;
}}, imm_type = uint64_t, imm_code = {{ imm = SHAMT6; }});
0x05: bseti({{
uint64_t index = imm & (64 - 1);
Rd = Rs1 | (UINT64_C(1) << index);
}}, imm_type = uint64_t, imm_code = {{ imm = SHAMT6; }});
0x09: bclri({{
uint64_t index = imm & (64 - 1);
Rd = Rs1 & (~(UINT64_C(1) << index));
}}, imm_type = uint64_t, imm_code = {{ imm = SHAMT6; }});
0x0d: binvi({{
uint64_t index = imm & (64 - 1);
Rd = Rs1 ^ (UINT64_C(1) << index);
}}, imm_type = uint64_t, imm_code = {{ imm = SHAMT6; }});
}
format ROp {
0x0c: decode RS2 {
0x00: clz({{
@@ -487,6 +501,10 @@ decode QUADRANT default Unknown::unknown() {
0x8: srai({{
Rd_sd = Rs1_sd >> imm;
}}, imm_type = uint64_t, imm_code = {{ imm = SHAMT6; }});
0x9: bexti({{
uint64_t index = imm & (64 - 1);
Rd = (Rs1 >> index) & 0x1;
}}, imm_type = uint64_t, imm_code = {{ imm = SHAMT6; }});
0xc: rori({{
Rd = (Rs1 >> imm) | (Rs1 << ((64 - imm) & (64 - 1)));
}}, imm_type = uint64_t, imm_code = {{ imm = SHAMT6; }});
@@ -784,10 +802,22 @@ decode QUADRANT default Unknown::unknown() {
}
}
}});
0x14: bset({{
Rs2 &= (64 - 1);
Rd = Rs1 | (UINT64_C(1) << Rs2);
}});
0x24: bclr({{
Rs2 &= (64 - 1);
Rd = Rs1 & (~(UINT64_C(1) << Rs2));
}});
0x30: rol({{
int shamt = Rs2 & (64 - 1);
Rd = (Rs1 << shamt) | (Rs1 >> ((64 - shamt) & (64 - 1)));
}});
0x34: binv({{
Rs2 &= (64 - 1);
Rd = Rs1 ^ (UINT64_C(1) << Rs2);
}});
}
0x2: decode FUNCT7 {
0x0: slt({{
@@ -895,6 +925,10 @@ decode QUADRANT default Unknown::unknown() {
0x5: minu({{
Rd = Rs1 < Rs2 ? Rs1 : Rs2;
}});
0x24: bext({{
Rs2 &= (64 - 1);
Rd = (Rs1 >> Rs2) & 0x1;
}});
0x30: ror({{
int shamt = Rs2 & (64 - 1);
Rd = (Rs1 >> shamt) | (Rs1 << ((64 - shamt) & (64 - 1)));