[Ffmpeg-devel] gcc4 support & MMX fixups (from Debian)
Wed Feb 1 18:03:26 CET 2006
Dnia Wednesday, 1 of February 2006 01:39, Aurelien Jacobs napisa?:
> > hmmm, the 4.1/4.0 fixed_transpose4x4 are equal but benchmarks differs.
> > maybe orig_transpose4x4 has different prologue?
> seems so.
> [ 4.0 / -O2 ]
> leal (%rdx,%rdx), %r8d
> movslq %edx,%r10
> leaq (%rcx,%rcx,2), %rax
> movslq %r8d,%r9
> addl %edx, %r8d
> movslq %r8d,%r8
it's strange. pure 4.0.[2,3] gives the same prologue as 4.1.
do you have a custom patches for 4.0.2?
to_be || !to_be == 1, to_be | ~to_be == -1
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