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all: Replace if (ARCH_FOO) checks by #if ARCH_FOO

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This is more spec-compliant because it does not rely
on dead-code elimination by the compiler. Especially
MSVC has problems with this, as can be seen in
https://ffmpeg.org/pipermail/ffmpeg-devel/2022-May/296373.html
or
https://ffmpeg.org/pipermail/ffmpeg-devel/2022-May/297022.html

This commit does not eliminate every instance where we rely
on dead code elimination: It only tackles branching to
the initialization of arch-specific dsp code, not e.g. all
uses of CONFIG_ and HAVE_ checks. But maybe it is already
enough to compile FFmpeg with MSVC with whole-programm-optimizations
enabled (if one does not disable too many components).

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt
2022-06-12 05:51:12 +02:00
parent e5f6707a7b
commit 40e6575aa3
131 changed files with 738 additions and 567 deletions
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21
libavutil/float_dsp.c
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@@ -150,15 +150,16 @@ av_cold AVFloatDSPContext *avpriv_float_dsp_alloc(int bit_exact)
fdsp->butterflies_float = butterflies_float_c;
fdsp->scalarproduct_float = avpriv_scalarproduct_float_c;
if (ARCH_AARCH64)
ff_float_dsp_init_aarch64(fdsp);
if (ARCH_ARM)
ff_float_dsp_init_arm(fdsp);
if (ARCH_PPC)
ff_float_dsp_init_ppc(fdsp, bit_exact);
if (ARCH_X86)
ff_float_dsp_init_x86(fdsp);
if (ARCH_MIPS)
ff_float_dsp_init_mips(fdsp);
#if ARCH_AARCH64
ff_float_dsp_init_aarch64(fdsp);
#elif ARCH_ARM
ff_float_dsp_init_arm(fdsp);
#elif ARCH_PPC
ff_float_dsp_init_ppc(fdsp, bit_exact);
#elif ARCH_X86
ff_float_dsp_init_x86(fdsp);
#elif ARCH_MIPS
ff_float_dsp_init_mips(fdsp);
#endif
return fdsp;
}