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X86: Implemented LODS.

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--HG--
extra : convert_revision : 4bd8f15bbc25f5dce16ea0504ad6dd21805fa56a
This commit is contained in:
Gabe Black
2007-10-12 20:07:28 -07:00
parent 9498e536c0
commit d82d3bbda5
2 changed files with 39 additions and 23 deletions
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20
src/arch/x86/isa/decoder/one_byte_opcodes.isa
View File

@@ -335,17 +335,17 @@
0x6: StringTestInst::CMPS(Yb,Xb);
0x7: StringTestInst::CMPS(Yv,Xv);
}
0x15: decode OPCODE_OP_BOTTOM3 {
0x0: Inst::TEST(rAb,Ib);
0x1: Inst::TEST(rAv,Iz);
0x2: StringInst::STOS(Yb);
0x3: StringInst::STOS(Yv);
0x4: lods_Al_Xb();
0x5: lods_rAX_Xv();
0x6: StringTestInst::SCAS(Yb);
0x7: StringTestInst::SCAS(Yv);
}
format Inst {
0x15: decode OPCODE_OP_BOTTOM3 {
0x0: TEST(rAb,Ib);
0x1: TEST(rAv,Iz);
0x2: StringInst::STOS(Yb);
0x3: StringInst::STOS(Yv);
0x4: StringInst::LODS(Xb);
0x5: StringInst::LODS(Xv);
0x6: StringTestInst::SCAS(Yb);
0x7: StringTestInst::SCAS(Yv);
}
0x16: MOV(Bb,Ib);
0x17: MOV(Bv,Iv);
0x18: decode OPCODE_OP_BOTTOM3 {

42
src/arch/x86/isa/insts/general_purpose/string/load_string.py
View File

@@ -53,16 +53,32 @@
#
# Authors: Gabe Black
microcode = ""
#let {{
# class LODS(Inst):
# "GenFault ${new UnimpInstFault}"
# class LODSB(Inst):
# "GenFault ${new UnimpInstFault}"
# class LODSW(Inst):
# "GenFault ${new UnimpInstFault}"
# class LODSD(Inst):
# "GenFault ${new UnimpInstFault}"
# class LODSQ(Inst):
# "GenFault ${new UnimpInstFault}"
#}};
microcode = '''
def macroop LODS_M {
# Find the constant we need to either add or subtract from rdi
ruflag t0, 10
movi t3, t3, dsz, flags=(CEZF,), dataSize=asz
subi t4, t0, dsz, dataSize=asz
mov t3, t3, t4, flags=(nCEZF,), dataSize=asz
ld rax, seg, [1, t0, rdi]
add rdi, rdi, t3, dataSize=asz
};
def macroop LODS_E_M {
# Find the constant we need to either add or subtract from rdi
ruflag t0, 10
movi t3, t3, dsz, flags=(CEZF,), dataSize=asz
subi t4, t0, dsz, dataSize=asz
mov t3, t3, t4, flags=(nCEZF,), dataSize=asz
topOfLoop:
ld rax, seg, [1, t0, rdi]
subi rcx, rcx, 1, flags=(EZF,), dataSize=asz
add rdi, rdi, t3, dataSize=asz
bri t0, label("topOfLoop"), flags=(nCEZF,)
fault "NoFault"
};
'''