Emulator-Archive/ppsspp
1
0
Fork 0
mirror of https://github.com/hrydgard/ppsspp.git synced 2025-02-13 18:30:32 +00:00
Code Issues Actions 2 Packages Projects Releases Wiki Activity

x86 jit: Use LEA to emulate addu but only when it can save a few bytes

Browse Source
This commit is contained in:
Henrik Rydgard 2014-11-16 17:39:07 +01:00
parent 1c78e29c79
commit 28ca8d4818
2 changed files with 8 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
Common/x64Emitter.cpp
View File

@ -31,7 +31,6 @@
namespace Gen
{
// TODO(ector): Add EAX special casing, for ever so slightly smaller code.
struct NormalOpDef
{
u8 toRm8, toRm32, fromRm8, fromRm32, imm8, imm32, simm8, eaximm8, eaximm32, ext;

9
Core/MIPS/x86/CompALU.cpp
View File

@ -436,7 +436,14 @@ namespace MIPSComp
case 32: //R(rd) = R(rs) + R(rt); break; //add
case 33: //R(rd) = R(rs) + R(rt); break; //addu
CompTriArith(op, &XEmitter::ADD, &RType3_ImmAdd);
if (rd != rs && rd != rt && gpr.R(rs).IsSimpleReg() && gpr.R(rt).IsSimpleReg()) {
gpr.Lock(rt, rs, rd);
gpr.MapReg(rd, false, true);
LEA(32, gpr.RX(rd), MRegSum(gpr.RX(rs), gpr.RX(rt)));
gpr.UnlockAll();
} else {
CompTriArith(op, &XEmitter::ADD, &RType3_ImmAdd);
}
break;
case 34: //R(rd) = R(rs) - R(rt); break; //sub
case 35: //R(rd) = R(rs) - R(rt); break; //subu