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FPROUND - variable flag offset

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This commit is contained in:
tevador
2019-01-11 10:52:12 +01:00
parent e487092f07
commit c02ee4291d
5 changed files with 20 additions and 8 deletions
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4
src/AssemblyGeneratorX86.cpp
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@@ -466,7 +466,9 @@ namespace RandomX {
void AssemblyGeneratorX86::h_FPROUND(Instruction& instr, int i) {
genar(instr, i);
asmCode << "\tmov rcx, rax" << std::endl;
asmCode << "\tshl eax, 13" << std::endl;
int rotate = (13 - (instr.imm8 & 63)) & 63;
if (rotate != 0)
asmCode << "\trol rax, " << rotate << std::endl;
asmCode << "\tand eax, 24576" << std::endl;
asmCode << "\tor eax, 40896" << std::endl;
asmCode << "\tmov dword ptr [rsp - 8], eax" << std::endl;

10
src/JitCompilerX86.cpp
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@@ -574,7 +574,15 @@ namespace RandomX {
void JitCompilerX86::h_FPROUND(Instruction& instr, int i) {
genar(instr);
emit(0x00250de0c1c88b48); //mov rcx,rax; shl eax,0xd
emitByte(0x48);
emit(uint16_t(0xc88b)); //mov rcx,rax
int rotate = (13 - (instr.imm8 & 63)) & 63;
if (rotate != 0) {
emitByte(0x48);
emit(uint16_t(0xc0c1)); //rol rax
emitByte(rotate);
}
emit(uint16_t(0x0025));
emit(0x00009fc00d000060); //and eax,0x6000; or eax,0x9fc0
emit(0x2454ae0ff8244489); //ldmxcsr DWORD PTR [rsp-0x8]
emitByte(0xf8);

2
src/program.inc
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@@ -8859,7 +8859,7 @@ rx_body_509:
and ecx, 2047
mov rax, qword ptr [rsi+rcx*8]
mov rcx, rax
shl eax, 13
rol rax, 34
and eax, 24576
or eax, 40896
mov dword ptr [rsp - 8], eax