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emit_x64_floating_point: Deinterlace 64-bit FPToFixed signed/unsigned codepaths

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merry 2022-02-23 16:38:29 +00:00
parent 442c01373a
commit 5fe274f510
1 changed files with 29 additions and 16 deletions
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47
src/dynarmic/backend/x64/emit_x64_floating_point.cpp
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@ -1500,32 +1500,45 @@ static void EmitFPToFixed(BlockOfCode& code, EmitContext& ctx, IR::Inst* inst) {
if constexpr (isize == 64) {
Xbyak::Label saturate_max, end;
if (unsigned_) {
code.maxsd(src, code.MConst(xword, f64_min_u64));
}
code.movsd(scratch, code.MConst(xword, unsigned_ ? f64_max_u64_lim : f64_max_s64_lim));
if (!unsigned_) {
code.movsd(scratch, code.MConst(xword, f64_max_s64_lim));
code.comisd(scratch, src);
code.jna(saturate_max, code.T_NEAR);
if (unsigned_) {
Xbyak::Label below_max;
code.movsd(scratch, code.MConst(xword, f64_max_s64_lim));
code.comisd(src, scratch);
code.jb(below_max);
code.subsd(src, scratch);
code.cvttsd2si(result, src);
code.btc(result, 63);
code.jmp(end);
code.L(below_max);
}
code.cvttsd2si(result, src); // 64 bit gpr
code.L(end);
code.SwitchToFarCode();
code.L(saturate_max);
code.mov(result, unsigned_ ? 0xFFFF'FFFF'FFFF'FFFF : 0x7FFF'FFFF'FFFF'FFFF);
code.mov(result, 0x7FFF'FFFF'FFFF'FFFF);
code.jmp(end, code.T_NEAR);
code.SwitchToNearCode();
} else {
Xbyak::Label below_max;
code.maxsd(src, code.MConst(xword, f64_min_u64));
code.movsd(scratch, code.MConst(xword, f64_max_u64_lim));
code.comisd(scratch, src);
code.jna(saturate_max, code.T_NEAR);
code.movsd(scratch, code.MConst(xword, f64_max_s64_lim));
code.comisd(src, scratch);
code.jb(below_max);
code.subsd(src, scratch);
code.cvttsd2si(result, src);
code.btc(result, 63);
code.jmp(end);
code.L(below_max);
code.cvttsd2si(result, src); // 64 bit gpr
code.L(end);
code.SwitchToFarCode();
code.L(saturate_max);
code.mov(result, 0xFFFF'FFFF'FFFF'FFFF);
code.jmp(end, code.T_NEAR);
code.SwitchToNearCode();
}
} else if constexpr (isize == 32) {
code.minsd(src, code.MConst(xword, unsigned_ ? f64_max_u32 : f64_max_s32));
if (unsigned_) {