archive/rpcs3
1
0
Fork 0
mirror of https://github.com/RPCS3/rpcs3.git synced 2025-07-07 15:31:26 +12:00
Code Issues Projects Releases Packages Wiki Activity Actions

SPU LLVM: improve ROTMA and ROTMAH instructions

Browse source 
Avoid sign extension, clamp shift amount with min op
This commit is contained in:
Nekotekina 2018-07-05 15:37:48 +03:00
parent 2b9fa7ed23
commit b9c026d441
1 changed files with 4 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

6
rpcs3/Emu/Cell/SPURecompiler.cpp
View file

@ -3086,7 +3086,8 @@ public:
void ROTMA(spu_opcode_t op) void ROTMA(spu_opcode_t op)
{ {
set_vr(op.rt, trunc<u32[4]>(sext<s64[4]>(get_vr(op.ra)) >> zext<s64[4]>(-get_vr(op.rb) & 0x3f))); const auto sh = eval(-get_vr(op.rb) & 0x3f);
set_vr(op.rt, get_vr<s32[4]>(op.ra) >> bitcast<s32[4]>(min(sh, splat<u32[4]>(0x1f))));
} }
void SHL(spu_opcode_t op) void SHL(spu_opcode_t op)
@ -3106,7 +3107,8 @@ public:
void ROTMAH(spu_opcode_t op) void ROTMAH(spu_opcode_t op)
{ {
set_vr(op.rt, trunc<u16[8]>(sext<s32[8]>(get_vr<u16[8]>(op.ra)) >> zext<s32[8]>(-get_vr<u16[8]>(op.rb) & 0x1f))); const auto sh = eval(-get_vr<u16[8]>(op.rb) & 0x1f);
set_vr(op.rt, get_vr<s16[8]>(op.ra) >> bitcast<s16[8]>(min(sh, splat<u16[8]>(0xf))));
} }
void SHLH(spu_opcode_t op) void SHLH(spu_opcode_t op)