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8 branch conditions for CALL/RET

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This commit is contained in:
tevador
2018-12-21 22:41:35 +01:00
parent 55afe9646f
commit 740c40b218
11 changed files with 1396 additions and 1051 deletions
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44
src/AssemblyGeneratorX86.cpp
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@@ -307,7 +307,7 @@ namespace RandomX {
}
}
else {
asmCode << "mov ecx, 1" << std::endl;
asmCode << "\tmov ecx, 1" << std::endl;
asmCode << "\tmov edx, " << regR32[instr.regb % RegistersCount] << std::endl;
asmCode << "\ttest edx, edx" << std::endl;
asmCode << "\tcmovne ecx, edx" << std::endl;
@@ -458,15 +458,36 @@ namespace RandomX {
gencf(instr);
}
static inline const char* jumpCondition(Instruction& instr, bool invert = false) {
switch ((instr.locb & 7) ^ invert)
{
case 0:
return "jbe";
case 1:
return "ja";
case 2:
return "js";
case 3:
return "jns";
case 4:
return "jo";
case 5:
return "jno";
case 6:
return "jl";
case 7:
return "jge";
}
}
void AssemblyGeneratorX86::h_CALL(Instruction& instr, int i) {
gena(instr);
if ((instr.locb & 7) < 6) {
asmCode << "\tcmp " << regR32[instr.regb % RegistersCount] << ", " << instr.imm32 << std::endl;
asmCode << "\tjbe short taken_call_" << i << std::endl;
gencr(instr);
asmCode << "\tjmp rx_i_" << wrapInstr(i + 1) << std::endl;
asmCode << "taken_call_" << i << ":" << std::endl;
}
asmCode << "\tcmp " << regR32[instr.regb % RegistersCount] << ", " << instr.imm32 << std::endl;
asmCode << "\t" << jumpCondition(instr);
asmCode << " short taken_call_" << i << std::endl;
gencr(instr);
asmCode << "\tjmp rx_i_" << wrapInstr(i + 1) << std::endl;
asmCode << "taken_call_" << i << ":" << std::endl;
if (trace) {
asmCode << "\tmov qword ptr [rsi + rdi * 8 + 262144], rax" << std::endl;
}
@@ -478,10 +499,9 @@ namespace RandomX {
gena(instr);
asmCode << "\tcmp rsp, rbp" << std::endl;
asmCode << "\tje short not_taken_ret_" << i << std::endl;
if ((instr.locb & 7) < 6) {
asmCode << "\tcmp " << regR32[instr.regb % RegistersCount] << ", " << instr.imm32 << std::endl;
asmCode << "\tja short not_taken_ret_" << i << std::endl;
}
asmCode << "\tcmp " << regR32[instr.regb % RegistersCount] << ", " << instr.imm32 << std::endl;
asmCode << "\t" << jumpCondition(instr, true);
asmCode << " short not_taken_ret_" << i << std::endl;
asmCode << "\txor rax, qword ptr [rsp + 8]" << std::endl;
gencr(instr);
asmCode << "\tret 8" << std::endl;