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Simplified CALL and RET

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This commit is contained in:
tevador
2019-01-11 10:18:24 +01:00
parent 557241cd95
commit e487092f07
3 changed files with 176 additions and 382 deletions
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src/JitCompilerX86.cpp
+5 -17
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@@ -623,19 +623,12 @@ namespace RandomX {
void JitCompilerX86::h_CALL(Instruction& instr, int i) {
genar(instr);
gencr(instr);
emit(uint16_t(0x8141)); //cmp regb, imm32
emitByte(0xf8 + (instr.regb % RegistersCount));
emit(instr.imm32);
emitByte(jumpCondition(instr));
if ((instr.locc & 7) <= 3) {
emitByte(0x16);
}
else {
emitByte(0x05);
}
gencr(instr);
emit(uint16_t(0x06eb)); //jmp to next
emitByte(0x50); //push rax
emitByte(jumpCondition(instr, true));
emitByte(0x05);
emitByte(0xe8); //call
i = wrapInstr(i + (instr.imm8 & 127) + 2);
if (i < instructionOffsets.size()) {
@@ -654,13 +647,8 @@ namespace RandomX {
crlen = 17;
}
emit(0x74e73b48); //cmp rsp, rdi; je
emitByte(11 + crlen);
emitByte(0x48);
emit(0x08244433); //xor rax,QWORD PTR [rsp+0x8]
gencr(instr);
emitByte(0xc2); //ret 8
emit(uint16_t(0x0008));
gencr(instr);
emitByte(0x01);
emitByte(0xc3); //ret
}
#include "instructionWeights.hpp"