Mirrors/yuzu
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Merge pull request #1088 from aroulin/x64-emitter-abi-call

Browse source 
x64: Proper stack alignment in shader JIT function calls
This commit is contained in:
bunnei 2015-09-02 08:46:58 -04:00
commit 918ca40c68
7 changed files with 301 additions and 455 deletions
Download patch file Download diff file Expand all files Collapse all files

43
src/video_core/shader/shader_jit_x64.cpp
View file

@ -122,6 +122,14 @@ static const X64Reg ONE = XMM14;
/// Constant vector of [-0.f, -0.f, -0.f, -0.f], used to efficiently negate a vector with XOR
static const X64Reg NEGBIT = XMM15;
// State registers that must not be modified by external functions calls
// Scratch registers, e.g., SRC1 and SCRATCH, have to be saved on the side if needed
static const BitSet32 persistent_regs = {
UNIFORMS, REGISTERS, // Pointers to register blocks
ADDROFFS_REG_0, ADDROFFS_REG_1, LOOPCOUNT_REG, COND0, COND1, // Cached registers
ONE+16, NEGBIT+16, // Constants
};
/// Raw constant for the source register selector that indicates no swizzling is performed
static const u8 NO_SRC_REG_SWIZZLE = 0x1b;
/// Raw constant for the destination register enable mask that indicates all components are enabled
@ -295,20 +303,8 @@ void JitCompiler::Compile_UniformCondition(Instruction instr) {
CMP(sizeof(bool) * 8, MDisp(UNIFORMS, offset), Imm8(0));
}
void JitCompiler::Compile_PushCallerSavedXMM() {
#ifndef _WIN32
SUB(64, R(RSP), Imm8(2 * 16));
MOVUPS(MDisp(RSP, 16), ONE);
MOVUPS(MDisp(RSP, 0), NEGBIT);
#endif
}
void JitCompiler::Compile_PopCallerSavedXMM() {
#ifndef _WIN32
MOVUPS(NEGBIT, MDisp(RSP, 0));
MOVUPS(ONE, MDisp(RSP, 16));
ADD(64, R(RSP), Imm8(2 * 16));
#endif
BitSet32 JitCompiler::PersistentCallerSavedRegs() {
return persistent_regs & ABI_ALL_CALLER_SAVED;
}
void JitCompiler::Compile_ADD(Instruction instr) {
@ -390,12 +386,9 @@ void JitCompiler::Compile_EX2(Instruction instr) {
Compile_SwizzleSrc(instr, 1, instr.common.src1, SRC1);
MOVSS(XMM0, R(SRC1));
// The following will actually break the stack alignment
ABI_PushAllCallerSavedRegsAndAdjustStack();
Compile_PushCallerSavedXMM();
ABI_PushRegistersAndAdjustStack(PersistentCallerSavedRegs(), 0);
ABI_CallFunction(reinterpret_cast<const void*>(exp2f));
Compile_PopCallerSavedXMM();
ABI_PopAllCallerSavedRegsAndAdjustStack();
ABI_PopRegistersAndAdjustStack(PersistentCallerSavedRegs(), 0);
SHUFPS(XMM0, R(XMM0), _MM_SHUFFLE(0, 0, 0, 0));
MOVAPS(SRC1, R(XMM0));
@ -406,12 +399,9 @@ void JitCompiler::Compile_LG2(Instruction instr) {
Compile_SwizzleSrc(instr, 1, instr.common.src1, SRC1);
MOVSS(XMM0, R(SRC1));
// The following will actually break the stack alignment
ABI_PushAllCallerSavedRegsAndAdjustStack();
Compile_PushCallerSavedXMM();
ABI_PushRegistersAndAdjustStack(PersistentCallerSavedRegs(), 0);
ABI_CallFunction(reinterpret_cast<const void*>(log2f));
Compile_PopCallerSavedXMM();
ABI_PopAllCallerSavedRegsAndAdjustStack();
ABI_PopRegistersAndAdjustStack(PersistentCallerSavedRegs(), 0);
SHUFPS(XMM0, R(XMM0), _MM_SHUFFLE(0, 0, 0, 0));
MOVAPS(SRC1, R(XMM0));
@ -560,7 +550,7 @@ void JitCompiler::Compile_NOP(Instruction instr) {
}
void JitCompiler::Compile_END(Instruction instr) {
ABI_PopAllCalleeSavedRegsAndAdjustStack();
ABI_PopRegistersAndAdjustStack(ABI_ALL_CALLEE_SAVED, 8);
RET();
}
@ -756,7 +746,8 @@ CompiledShader* JitCompiler::Compile() {
const auto& code = g_state.vs.program_code;
unsigned offset = g_state.regs.vs.main_offset;
ABI_PushAllCalleeSavedRegsAndAdjustStack();
// The stack pointer is 8 modulo 16 at the entry of a procedure
ABI_PushRegistersAndAdjustStack(ABI_ALL_CALLEE_SAVED, 8);
MOV(PTRBITS, R(REGISTERS), R(ABI_PARAM1));
MOV(PTRBITS, R(UNIFORMS), ImmPtr(&g_state.vs.uniforms));

3
src/video_core/shader/shader_jit_x64.h
View file

@ -77,8 +77,7 @@ private:
void Compile_EvaluateCondition(Instruction instr);
void Compile_UniformCondition(Instruction instr);
void Compile_PushCallerSavedXMM();
void Compile_PopCallerSavedXMM();
BitSet32 PersistentCallerSavedRegs();
/// Pointer to the variable that stores the current Pica code offset. Used to handle nested code blocks.
unsigned* offset_ptr = nullptr;