From: Loren Merritt <lorenm@u.washington.edu>
Date: Wed, 6 Feb 2008 04:44:21 +0000 (+0000)
Subject: put loop counter in a register if possible. makes some of the qpel functions 3% faster.
X-Git-Tag: android-x86-4.4-r1~33721
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=20d565be6d52c38495eeaa8904c02315421629b3;p=android-x86%2Fexternal-ffmpeg.git

put loop counter in a register if possible. makes some of the qpel functions 3% faster.

Originally committed as revision 11876 to svn://svn.ffmpeg.org/ffmpeg/trunk
---

diff --git a/libavcodec/i386/dsputil_mmx.c b/libavcodec/i386/dsputil_mmx.c
index 611ee37108..55343181de 100644
--- a/libavcodec/i386/dsputil_mmx.c
+++ b/libavcodec/i386/dsputil_mmx.c
@@ -2061,7 +2061,7 @@ static void OPNAME ## mpeg4_qpel16_h_lowpass_mmx2(uint8_t *dst, uint8_t *src, in
         "add %4, %1                       \n\t"\
         "decl %2                          \n\t"\
         " jnz 1b                          \n\t"\
-        : "+a"(src), "+c"(dst), "+m"(h)\
+        : "+a"(src), "+c"(dst), "+g"(h)\
         : "d"((long)srcStride), "S"((long)dstStride), /*"m"(ff_pw_20), "m"(ff_pw_3),*/ "m"(temp), "m"(ROUNDER)\
         : "memory"\
     );\
@@ -2174,7 +2174,7 @@ static void OPNAME ## mpeg4_qpel8_h_lowpass_mmx2(uint8_t *dst, uint8_t *src, int
         "add %4, %1                       \n\t"\
         "decl %2                          \n\t"\
         " jnz 1b                          \n\t"\
-        : "+a"(src), "+c"(dst), "+m"(h)\
+        : "+a"(src), "+c"(dst), "+g"(h)\
         : "S"((long)srcStride), "D"((long)dstStride), /*"m"(ff_pw_20), "m"(ff_pw_3),*/ "m"(temp), "m"(ROUNDER)\
         : "memory"\
     );\
diff --git a/libavcodec/i386/h264dsp_mmx.c b/libavcodec/i386/h264dsp_mmx.c
index 4dc57321a3..340d9fab5f 100644
--- a/libavcodec/i386/h264dsp_mmx.c
+++ b/libavcodec/i386/h264dsp_mmx.c
@@ -796,7 +796,7 @@ static av_noinline void OPNAME ## h264_qpel4_h_lowpass_ ## MMX(uint8_t *dst, uin
         "add %4, %1                 \n\t"\
         "decl %2                    \n\t"\
         " jnz 1b                    \n\t"\
-        : "+a"(src), "+c"(dst), "+m"(h)\
+        : "+a"(src), "+c"(dst), "+g"(h)\
         : "d"((long)srcStride), "S"((long)dstStride), "m"(ff_pw_5), "m"(ff_pw_16)\
         : "memory"\
     );\
@@ -930,7 +930,7 @@ static av_noinline void OPNAME ## h264_qpel4_hv_lowpass_ ## MMX(uint8_t *dst, in
         "add %3, %1                 \n\t"\
         "decl %2                    \n\t"\
         " jnz 1b                    \n\t"\
-        : "+a"(tmp), "+c"(dst), "+m"(h)\
+        : "+a"(tmp), "+c"(dst), "+g"(h)\
         : "S"((long)dstStride)\
         : "memory"\
     );\
@@ -987,7 +987,7 @@ static av_noinline void OPNAME ## h264_qpel8_h_lowpass_ ## MMX(uint8_t *dst, uin
         "add %4, %1                 \n\t"\
         "decl %2                    \n\t"\
         " jnz 1b                    \n\t"\
-        : "+a"(src), "+c"(dst), "+m"(h)\
+        : "+a"(src), "+c"(dst), "+g"(h)\
         : "d"((long)srcStride), "S"((long)dstStride), "m"(ff_pw_5), "m"(ff_pw_16)\
         : "memory"\
     );\
@@ -1201,7 +1201,7 @@ static av_noinline void OPNAME ## h264_qpel8or16_hv_lowpass_ ## MMX(uint8_t *dst
         "add %3, %1                 \n\t"\
         "decl %2                    \n\t"\
         " jnz 1b                    \n\t"\
-        : "+a"(tmp), "+c"(dst), "+m"(h)\
+        : "+a"(tmp), "+c"(dst), "+g"(h)\
         : "S"((long)dstStride)\
         : "memory"\
     );\