5a68954b0a
fix addresses issue when building ffmpeg with binutils v2.41 that is documented here: https://trac.ffmpeg.org/ticket/10405 Issue about build failure is available here: https://github.com/openwrt/packages/issues/22170 Remarks: Patch is merged to ffmpeg upstream and will be included in next release of ffmpeg, so patch applies only to current version and is removed when package is updated to next version of ffmpeg. Signed-off-by: Oskari Rauta <oskari.rauta@gmail.com> Co-authored-by: Josef Schlehofer <pepe.schlehofer@gmail.com>
71 lines
2.1 KiB
Diff
71 lines
2.1 KiB
Diff
From: Rémi Denis-Courmont <remi@remlab.net>
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Date: Sun, 16 Jul 2023 15:18:02 +0000 (+0300)
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Subject: avcodec/x86/mathops: clip constants used with shift instructions within inline assembly
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X-Git-Url: http://git.ffmpeg.org/gitweb/ffmpeg.git/commitdiff_plain/25cd95a9dc3510c3cc0d7aad6f9d83f6a1078c7e?hp=e5b5dd66535f444451e0fee59247b224d866f334
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avcodec/x86/mathops: clip constants used with shift instructions within inline assembly
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Fixes assembling with binutil as >= 2.41
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Signed-off-by: James Almer <jamrial@gmail.com>
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(cherry picked from commit effadce6c756247ea8bae32dc13bb3e6f464f0eb)
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---
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--- a/libavcodec/x86/mathops.h
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+++ b/libavcodec/x86/mathops.h
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@@ -35,12 +35,20 @@
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static av_always_inline av_const int MULL(int a, int b, unsigned shift)
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{
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int rt, dummy;
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+ if (__builtin_constant_p(shift))
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__asm__ (
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"imull %3 \n\t"
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"shrdl %4, %%edx, %%eax \n\t"
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:"=a"(rt), "=d"(dummy)
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- :"a"(a), "rm"(b), "ci"((uint8_t)shift)
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+ :"a"(a), "rm"(b), "i"(shift & 0x1F)
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);
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+ else
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+ __asm__ (
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+ "imull %3 \n\t"
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+ "shrdl %4, %%edx, %%eax \n\t"
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+ :"=a"(rt), "=d"(dummy)
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+ :"a"(a), "rm"(b), "c"((uint8_t)shift)
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+ );
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return rt;
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}
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@@ -113,19 +121,31 @@ __asm__ volatile(\
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// avoid +32 for shift optimization (gcc should do that ...)
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#define NEG_SSR32 NEG_SSR32
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static inline int32_t NEG_SSR32( int32_t a, int8_t s){
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+ if (__builtin_constant_p(s))
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__asm__ ("sarl %1, %0\n\t"
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: "+r" (a)
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- : "ic" ((uint8_t)(-s))
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+ : "i" (-s & 0x1F)
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);
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+ else
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+ __asm__ ("sarl %1, %0\n\t"
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+ : "+r" (a)
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+ : "c" ((uint8_t)(-s))
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+ );
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return a;
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}
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#define NEG_USR32 NEG_USR32
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static inline uint32_t NEG_USR32(uint32_t a, int8_t s){
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+ if (__builtin_constant_p(s))
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__asm__ ("shrl %1, %0\n\t"
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: "+r" (a)
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- : "ic" ((uint8_t)(-s))
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+ : "i" (-s & 0x1F)
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);
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+ else
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+ __asm__ ("shrl %1, %0\n\t"
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+ : "+r" (a)
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+ : "c" ((uint8_t)(-s))
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+ );
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return a;
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}
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