diff options
| author | Sintendo <3380580+Sintendo@users.noreply.github.com> | 2025-08-06 01:22:01 +0200 |
|---|---|---|
| committer | Sintendo <3380580+Sintendo@users.noreply.github.com> | 2025-08-07 07:51:15 +0200 |
| commit | 45a3e35b0684d8f42e51f2c074e208658125b49e (patch) | |
| tree | 4aed5bd88b6ba9122d07884cf35a65a908249bae /Source/Core | |
| parent | fc9f2d9cea4fc0e92e16edbe075780d68c591cc7 (diff) | |
JitArm64_Integer: subfcx - Subtract 12-bit constant
Eliminate an instruction by encoding the constant in the subtraction.
Before:
0x5280037a mov w26, #0x1b ; =27
0x6b1a02bb subs w27, w21, w26
0x93407f78 sxtw x24, w27
After:
0x71006ebb subs w27, w21, #0x1b
0x93407f7a sxtw x26, w27
Diffstat (limited to 'Source/Core')
| -rw-r--r-- | Source/Core/Core/PowerPC/JitArm64/JitArm64_Integer.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Source/Core/Core/PowerPC/JitArm64/JitArm64_Integer.cpp b/Source/Core/Core/PowerPC/JitArm64/JitArm64_Integer.cpp index 25a4ada478..7cf2305d5a 100644 --- a/Source/Core/Core/PowerPC/JitArm64/JitArm64_Integer.cpp +++ b/Source/Core/Core/PowerPC/JitArm64/JitArm64_Integer.cpp @@ -1443,6 +1443,14 @@ void JitArm64::subfcx(UGeckoInstruction inst) if (inst.Rc) ComputeRC0(gpr.R(d)); } + else if (gpr.IsImm(a) && ((gpr.GetImm(a) & 0xFFF) == gpr.GetImm(a))) + { + gpr.BindToRegister(d, d == b); + CARRY_IF_NEEDED(SUB, SUBS, gpr.R(d), gpr.R(b), gpr.GetImm(a)); + ComputeCarry(); + if (inst.Rc) + ComputeRC0(gpr.R(d)); + } else if (gpr.IsImm(b, 0)) { gpr.BindToRegister(d, d == a); |