Leigh Scott
11 months ago
parent
7e94d40e65
commit
a73213274d
@ -0,0 +1,77 @@
|
||||
From 25cd95a9dc3510c3cc0d7aad6f9d83f6a1078c7e Mon Sep 17 00:00:00 2001
|
||||
From: =?utf8?q?R=C3=A9mi=20Denis-Courmont?= <remi@remlab.net>
|
||||
Date: Sun, 16 Jul 2023 18:18:02 +0300
|
||||
Subject: [PATCH] avcodec/x86/mathops: clip constants used with shift
|
||||
instructions within inline assembly
|
||||
|
||||
Fixes assembling with binutil as >= 2.41
|
||||
|
||||
Signed-off-by: James Almer <jamrial@gmail.com>
|
||||
(cherry picked from commit effadce6c756247ea8bae32dc13bb3e6f464f0eb)
|
||||
---
|
||||
libavcodec/x86/mathops.h | 26 +++++++++++++++++++++++---
|
||||
1 file changed, 23 insertions(+), 3 deletions(-)
|
||||
|
||||
diff --git a/libavcodec/x86/mathops.h b/libavcodec/x86/mathops.h
|
||||
index 6298f5ed19..ca7e2dffc1 100644
|
||||
--- a/libavcodec/x86/mathops.h
|
||||
+++ b/libavcodec/x86/mathops.h
|
||||
@@ -35,12 +35,20 @@
|
||||
static av_always_inline av_const int MULL(int a, int b, unsigned shift)
|
||||
{
|
||||
int rt, dummy;
|
||||
+ if (__builtin_constant_p(shift))
|
||||
__asm__ (
|
||||
"imull %3 \n\t"
|
||||
"shrdl %4, %%edx, %%eax \n\t"
|
||||
:"=a"(rt), "=d"(dummy)
|
||||
- :"a"(a), "rm"(b), "ci"((uint8_t)shift)
|
||||
+ :"a"(a), "rm"(b), "i"(shift & 0x1F)
|
||||
);
|
||||
+ else
|
||||
+ __asm__ (
|
||||
+ "imull %3 \n\t"
|
||||
+ "shrdl %4, %%edx, %%eax \n\t"
|
||||
+ :"=a"(rt), "=d"(dummy)
|
||||
+ :"a"(a), "rm"(b), "c"((uint8_t)shift)
|
||||
+ );
|
||||
return rt;
|
||||
}
|
||||
|
||||
@@ -113,19 +121,31 @@ __asm__ volatile(\
|
||||
// avoid +32 for shift optimization (gcc should do that ...)
|
||||
#define NEG_SSR32 NEG_SSR32
|
||||
static inline int32_t NEG_SSR32( int32_t a, int8_t s){
|
||||
+ if (__builtin_constant_p(s))
|
||||
__asm__ ("sarl %1, %0\n\t"
|
||||
: "+r" (a)
|
||||
- : "ic" ((uint8_t)(-s))
|
||||
+ : "i" (-s & 0x1F)
|
||||
);
|
||||
+ else
|
||||
+ __asm__ ("sarl %1, %0\n\t"
|
||||
+ : "+r" (a)
|
||||
+ : "c" ((uint8_t)(-s))
|
||||
+ );
|
||||
return a;
|
||||
}
|
||||
|
||||
#define NEG_USR32 NEG_USR32
|
||||
static inline uint32_t NEG_USR32(uint32_t a, int8_t s){
|
||||
+ if (__builtin_constant_p(s))
|
||||
__asm__ ("shrl %1, %0\n\t"
|
||||
: "+r" (a)
|
||||
- : "ic" ((uint8_t)(-s))
|
||||
+ : "i" (-s & 0x1F)
|
||||
);
|
||||
+ else
|
||||
+ __asm__ ("shrl %1, %0\n\t"
|
||||
+ : "+r" (a)
|
||||
+ : "c" ((uint8_t)(-s))
|
||||
+ );
|
||||
return a;
|
||||
}
|
||||
|
||||
--
|
||||
2.25.1
|
||||
|
||||
Loading…
Reference in new issue