[FFmpeg-devel] [PATCH 06/14] [inline assembly] add mmx/xmm clobbers in fdct.c

[frederic . recoules]

From: Frédéric Recoules <frederic.recou...@orange.fr>

---
 libavcodec/x86/fdct.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/libavcodec/x86/fdct.c b/libavcodec/x86/fdct.c
index 112566ded0..2635d58cbf 100644
--- a/libavcodec/x86/fdct.c
+++ b/libavcodec/x86/fdct.c
@@ -288,7 +288,7 @@ TABLE_SSE2
 
 #define S(s) AV_TOSTRING(s) //AV_STRINGIFY is too long
 
-#define FDCT_COL(cpu, mm, mov)\
+#define FDCT_COL(cpu, mm, mov, MM)                                     \
 static av_always_inline void fdct_col_##cpu(const int16_t *in, int16_t *out, 
int offset)\
 {\
     __asm__ volatile (\
@@ -369,11 +369,13 @@ static av_always_inline void fdct_col_##cpu(const int16_t 
*in, int16_t *out, int
         #mov"    %%"#mm"3,   112(%3) \n\t" \
         : \
         : "r" (in  + offset), "r" (fdct_tg_all_16), "r" (fdct_one_corr), \
-          "r" (out + offset), "r" (ocos_4_16)); \
+          "r" (out + offset), "r" (ocos_4_16) \
+       MM##_CLOBBERS_ONLY(#mm"0", #mm"1", #mm"2", #mm"3", \
+                          #mm"4", #mm"5", #mm"6", #mm"7") );   \
 }
 
-FDCT_COL(mmx, mm, movq)
-FDCT_COL(sse2, xmm, movdqa)
+FDCT_COL(mmx, mm, movq, MMX)
+FDCT_COL(sse2, xmm, movdqa, XMM)
 
 static av_always_inline void fdct_row_sse2(const int16_t *in, int16_t *out)
 {
@@ -484,7 +486,9 @@ static av_always_inline void fdct_row_mmxext(const int16_t 
*in, int16_t *out,
         "movq      %%mm3,  (%3) \n\t"
         "movq      %%mm7, 8(%3) \n\t"
         :
-        : "r" (in), "r" (table), "r" (fdct_r_row), "r" (out));
+        : "r" (in), "r" (table), "r" (fdct_r_row), "r" (out)
+         MMX_CLOBBERS_ONLY("%mm0", "%mm1", "%mm2", "%mm3",
+                            "%mm4", "%mm5", "%mm6", "%mm7") );
 }
 
 static av_always_inline void fdct_row_mmx(const int16_t *in, int16_t *out, 
const int16_t *table)
@@ -535,7 +539,9 @@ static av_always_inline void fdct_row_mmx(const int16_t 
*in, int16_t *out, const
         "movq      %%mm3, 0(%3) \n\t"
         "movq      %%mm7, 8(%3) \n\t"
         :
-        : "r" (in), "r" (table), "r" (fdct_r_row), "r" (out));
+        : "r" (in), "r" (table), "r" (fdct_r_row), "r" (out)
+         MMX_CLOBBERS_ONLY("%mm0", "%mm1", "%mm2", "%mm3",
+                            "%mm4", "%mm5", "%mm6", "%mm7") );
 }
 
 void ff_fdct_mmx(int16_t *block)
-- 
2.17.1

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