• Henrik Gramner's avatar
    x86: Remove X264_CPU_SSE_MISALIGN functions · ff41804e
    Henrik Gramner authored
    Prevents a crash if the misaligned exception mask bit is cleared for some reason.
    Misaligned SSE functions are only used on AMD Phenom CPUs and the benefit is miniscule.
    They also require modifying the MXCSR control register and by removing those functions
    we can get rid of that complexity altogether.
    VEX-encoded instructions also supports unaligned memory operands. I tried adding AVX
    implementations of all removed functions but there were no performance improvements on
    Ivy Bridge. pixel_sad_x3 and pixel_sad_x4 had significant code size reductions though
    so I kept them and added some minor cosmetics fixes and tweaks.
cpu.h 2.86 KB