From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Gentoo xenia-canary overlay
Date: Wed, 11 Feb 2026 00:00:00 +0000
Subject: [PATCH] FFmpeg mathops.h: fix GCC LTO operand type mismatch for shr/sar

Under GCC LTO the "ic" constraint for the shift count can yield a
register, but x86 shr/sar with a register operand must use %cl.
Use constraint "c" and %b1 so the shift count is always in %cl,
fixing "Error: operand type mismatch for 'shr'" and 'sar'.

---
 third_party/FFmpeg/libavcodec/x86/mathops.h | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/third_party/FFmpeg/libavcodec/x86/mathops.h b/third_party/FFmpeg/libavcodec/x86/mathops.h
index 6298f5ed19..c74a2a6928 100644
--- a/third_party/FFmpeg/libavcodec/x86/mathops.h
+++ b/third_party/FFmpeg/libavcodec/x86/mathops.h
@@ -111,20 +111,21 @@ __asm__ volatile(\
              : "+a"(level), "=&d"(mask))
 
 // avoid +32 for shift optimization (gcc should do that ...)
+// Use "c" (%%cl) for shift count to avoid GCC LTO operand type mismatch (shr/sar).
 #define NEG_SSR32 NEG_SSR32
 static inline  int32_t NEG_SSR32( int32_t a, int8_t s){
-    __asm__ ("sarl %1, %0\n\t"
+    __asm__ ("sarl %b1, %0\n\t"
          : "+r" (a)
-         : "ic" ((uint8_t)(-s))
+         : "c" ((uint8_t)(-s))
     );
     return a;
 }
 
 #define NEG_USR32 NEG_USR32
 static inline uint32_t NEG_USR32(uint32_t a, int8_t s){
-    __asm__ ("shrl %1, %0\n\t"
+    __asm__ ("shrl %b1, %0\n\t"
          : "+r" (a)
-         : "ic" ((uint8_t)(-s))
+         : "c" ((uint8_t)(-s))
     );
     return a;
 }

-- 
2.52.0