Jit64: mtfsfx - Optimized masking
The masking logic can be eliminated when the mask is known to be all
ones. This case is very common.
Before:
66 48 0F 7E F0 movq rax,xmm6
8B 55 5C mov edx,dword ptr [rbp+5Ch]
83 E0 FF and eax,0FFFFFFFFh
83 E2 00 and edx,0
0B C2 or eax,edx
89 45 5C mov dword ptr [rbp+5Ch],eax
48 8D 15 C3 3C FE 01 lea rdx,[19520020h]
83 E0 07 and eax,7
0F AE 14 82 ldmxcsr dword ptr [rdx+rax*4]
After:
66 48 0F 7E F0 movq rax,xmm6
89 45 5C mov dword ptr [rbp+5Ch],eax
48 8D 15 2A D1 FD 01 lea rdx,[19440000h]
83 E0 07 and eax,7
0F AE 14 82 ldmxcsr dword ptr [rdx+rax*4]
Sintendo
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