From 7c6203dc5ed9a8b5ae9154602d27717569851571 Mon Sep 17 00:00:00 2001
From: MerryMage <MerryMage@users.noreply.github.com>
Date: Mon, 15 Jun 2020 19:04:29 +0100
Subject: [PATCH] xbyak_abi: Prefer returning a struct to using out parameters
in ABI_CalculateFrameSize
---
src/common/x64/xbyak_abi.h | 36 +++++++++++++++++++-----------------
1 file changed, 19 insertions(+), 17 deletions(-)
diff --git a/src/common/x64/xbyak_abi.h b/src/common/x64/xbyak_abi.h
index 33a96d6cbf..a5f5d4fc10 100644
--- a/src/common/x64/xbyak_abi.h
+++ b/src/common/x64/xbyak_abi.h
@@ -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;
@@ -170,14 +174,13 @@ 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]) {
@@ -185,14 +188,14 @@ inline size_t ABI_PushRegistersAndAdjustStack(Xbyak::CodeGenerator& code, std::b
}
}
- if (subtraction != 0) {
- code.sub(code.rsp, subtraction);
+ 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(i));
- xmm_offset += 0x10;
+ code.movaps(code.xword[code.rsp + frame_info.xmm_offset], IndexToXmm(i));
+ frame_info.xmm_offset += 0x10;
}
}
@@ -201,18 +204,17 @@ 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(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