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Merge pull request #4086 from MerryMage/abi

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xbyak_abi: Cleanup
This commit is contained in:
bunnei 2020-06-17 11:20:52 -04:00 • committed by GitHub
commit a8ac99b619
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 36 additions and 73 deletions
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97
src/common/x64/xbyak_abi.h
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@ -11,7 +11,7 @@
namespace Common::X64 {
inline int RegToIndex(const Xbyak::Reg& reg) {
inline std::size_t RegToIndex(const Xbyak::Reg& reg) {
using Kind = Xbyak::Reg::Kind;
ASSERT_MSG((reg.getKind() & (Kind::REG | Kind::XMM)) != 0,
"RegSet only support GPRs and XMM registers.");
@ -19,17 +19,17 @@ inline int RegToIndex(const Xbyak::Reg& reg) {
return reg.getIdx() + (reg.getKind() == Kind::REG ? 0 : 16);
}
inline Xbyak::Reg64 IndexToReg64(int reg_index) {
inline Xbyak::Reg64 IndexToReg64(std::size_t reg_index) {
ASSERT(reg_index < 16);
return Xbyak::Reg64(reg_index);
return Xbyak::Reg64(static_cast<int>(reg_index));
}
inline Xbyak::Xmm IndexToXmm(int reg_index) {
inline Xbyak::Xmm IndexToXmm(std::size_t reg_index) {
ASSERT(reg_index >= 16 && reg_index < 32);
return Xbyak::Xmm(reg_index - 16);
return Xbyak::Xmm(static_cast<int>(reg_index - 16));
}
inline Xbyak::Reg IndexToReg(int reg_index) {
inline Xbyak::Reg IndexToReg(std::size_t reg_index) {
if (reg_index < 16) {
return IndexToReg64(reg_index);
} else {
@ -151,9 +151,13 @@ constexpr size_t ABI_SHADOW_SPACE = 0;
#endif
inline void ABI_CalculateFrameSize(std::bitset<32> regs, size_t rsp_alignment,
size_t needed_frame_size, s32* out_subtraction,
s32* out_xmm_offset) {
struct ABIFrameInfo {
s32 subtraction;
s32 xmm_offset;
};
inline ABIFrameInfo ABI_CalculateFrameSize(std::bitset<32> regs, size_t rsp_alignment,
size_t needed_frame_size) {
const auto count = (regs & ABI_ALL_GPRS).count();
rsp_alignment -= count * 8;
size_t subtraction = 0;
@ -170,33 +174,28 @@ inline void ABI_CalculateFrameSize(std::bitset<32> regs, size_t rsp_alignment,
rsp_alignment -= subtraction;
subtraction += rsp_alignment & 0xF;
*out_subtraction = (s32)subtraction;
*out_xmm_offset = (s32)(subtraction - xmm_base_subtraction);
return ABIFrameInfo{static_cast<s32>(subtraction),
static_cast<s32>(subtraction - xmm_base_subtraction)};
}
inline size_t ABI_PushRegistersAndAdjustStack(Xbyak::CodeGenerator& code, std::bitset<32> regs,
size_t rsp_alignment, size_t needed_frame_size = 0) {
s32 subtraction, xmm_offset;
ABI_CalculateFrameSize(regs, rsp_alignment, needed_frame_size, &subtraction, &xmm_offset);
auto frame_info = ABI_CalculateFrameSize(regs, rsp_alignment, needed_frame_size);
for (std::size_t i = 0; i < regs.size(); ++i) {
if (regs[i] && ABI_ALL_GPRS[i]) {
code.push(IndexToReg64(static_cast<int>(i)));
}
}
if (subtraction != 0) {
code.sub(code.rsp, subtraction);
}
for (int i = 0; i < regs.count(); i++) {
if (regs.test(i) & ABI_ALL_GPRS.test(i)) {
code.push(IndexToReg64(i));
}
}
if (frame_info.subtraction != 0) {
code.sub(code.rsp, frame_info.subtraction);
}
for (std::size_t i = 0; i < regs.size(); ++i) {
if (regs[i] && ABI_ALL_XMMS[i]) {
code.movaps(code.xword[code.rsp + xmm_offset], IndexToXmm(static_cast<int>(i)));
xmm_offset += 0x10;
code.movaps(code.xword[code.rsp + frame_info.xmm_offset], IndexToXmm(i));
frame_info.xmm_offset += 0x10;
}
}
@ -205,59 +204,23 @@ inline size_t ABI_PushRegistersAndAdjustStack(Xbyak::CodeGenerator& code, std::b
inline void ABI_PopRegistersAndAdjustStack(Xbyak::CodeGenerator& code, std::bitset<32> regs,
size_t rsp_alignment, size_t needed_frame_size = 0) {
s32 subtraction, xmm_offset;
ABI_CalculateFrameSize(regs, rsp_alignment, needed_frame_size, &subtraction, &xmm_offset);
auto frame_info = ABI_CalculateFrameSize(regs, rsp_alignment, needed_frame_size);
for (std::size_t i = 0; i < regs.size(); ++i) {
if (regs[i] && ABI_ALL_XMMS[i]) {
code.movaps(IndexToXmm(static_cast<int>(i)), code.xword[code.rsp + xmm_offset]);
xmm_offset += 0x10;
code.movaps(IndexToXmm(i), code.xword[code.rsp + frame_info.xmm_offset]);
frame_info.xmm_offset += 0x10;
}
}
if (subtraction != 0) {
code.add(code.rsp, subtraction);
if (frame_info.subtraction != 0) {
code.add(code.rsp, frame_info.subtraction);
}
// GPRs need to be popped in reverse order
for (int i = 15; i >= 0; i--) {
if (regs[i]) {
code.pop(IndexToReg64(i));
}
}
}
inline size_t ABI_PushRegistersAndAdjustStackGPS(Xbyak::CodeGenerator& code, std::bitset<32> regs,
size_t rsp_alignment,
size_t needed_frame_size = 0) {
s32 subtraction, xmm_offset;
ABI_CalculateFrameSize(regs, rsp_alignment, needed_frame_size, &subtraction, &xmm_offset);
for (std::size_t i = 0; i < regs.size(); ++i) {
for (std::size_t j = 0; j < regs.size(); ++j) {
const std::size_t i = regs.size() - j - 1;
if (regs[i] && ABI_ALL_GPRS[i]) {
code.push(IndexToReg64(static_cast<int>(i)));
}
}
if (subtraction != 0) {
code.sub(code.rsp, subtraction);
}
return ABI_SHADOW_SPACE;
}
inline void ABI_PopRegistersAndAdjustStackGPS(Xbyak::CodeGenerator& code, std::bitset<32> regs,
size_t rsp_alignment, size_t needed_frame_size = 0) {
s32 subtraction, xmm_offset;
ABI_CalculateFrameSize(regs, rsp_alignment, needed_frame_size, &subtraction, &xmm_offset);
if (subtraction != 0) {
code.add(code.rsp, subtraction);
}
// GPRs need to be popped in reverse order
for (int i = 15; i >= 0; i--) {
if (regs[i]) {
code.pop(IndexToReg64(i));
}
}