From 739f79a5ff6a74fd2ea52478267b4b84f3671275 Mon Sep 17 00:00:00 2001
From: zuxy <zuxy@b3059339-0415-0410-9bf9-f77b7e298cf2>
Date: Wed, 6 Jun 2007 05:13:13 +0000
Subject: Align output pointer so that we can use movaps instead of movups in
 dct64_sse; 1.5% faster decode.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@23484 b3059339-0415-0410-9bf9-f77b7e298cf2
---
 mp3lib/dct64_sse.c | 20 +++++---------------
 mp3lib/layer1.c    |  2 +-
 mp3lib/layer2.c    |  2 +-
 mp3lib/layer3.c    |  4 ++--
 4 files changed, 9 insertions(+), 19 deletions(-)

(limited to 'mp3lib')

diff --git a/mp3lib/dct64_sse.c b/mp3lib/dct64_sse.c
index 4a9b3a092e..069a1da808 100644
--- a/mp3lib/dct64_sse.c
+++ b/mp3lib/dct64_sse.c
@@ -5,17 +5,7 @@
  * and mp3lib/dct64_MMX.c
  */
 
-/* NOTE: The following code is suboptimal! It can be improved (at least) by
-
-   1. Replace all movups by movaps. (Can Parameter c be always aligned on 
-      a 16-byte boundary?)
-
-   2. Rewritten using intrinsics. (GCC generally optimizes intrinsics
-      better. However, when __m128 locals are involved, GCC may
-      produce bad code that uses movaps to access a stack not aligned
-      on a 16-byte boundary, which leads to run-time crashes.)
-
-*/
+#include <libavutil/mem.h>
 
 typedef float real;
 
@@ -32,8 +22,8 @@ static const int nnnn[4] __attribute__((aligned(16))) =
 
 void dct64_sse(short *out0,short *out1,real *c)
 {
-    static real __attribute__ ((aligned(16))) b1[0x20];
-    static real __attribute__ ((aligned(16))) b2[0x20];
+    static DECLARE_ALIGNED(16, real, b1[0x20]);
+    static DECLARE_ALIGNED(16, real, b2[0x20]);
     static real const one = 1.f;
 
     {
@@ -45,9 +35,9 @@ void dct64_sse(short *out0,short *out1,real *c)
             asm(
                 "movaps    %2, %%xmm3\n\t"
                 "shufps    $27, %%xmm3, %%xmm3\n\t"
-                "movups    %3, %%xmm1\n\t"
+                "movaps    %3, %%xmm1\n\t"
                 "movaps    %%xmm1, %%xmm4\n\t"
-                "movups    %4, %%xmm2\n\t"
+                "movaps    %4, %%xmm2\n\t"
                 "shufps    $27, %%xmm4, %%xmm4\n\t"
                 "movaps    %%xmm2, %%xmm0\n\t"
                 "shufps    $27, %%xmm0, %%xmm0\n\t"
diff --git a/mp3lib/layer1.c b/mp3lib/layer1.c
index 0e17602966..444dab9a4d 100644
--- a/mp3lib/layer1.c
+++ b/mp3lib/layer1.c
@@ -131,7 +131,7 @@ static int do_layer1(struct frame *fr,int single)
   int i,stereo = fr->stereo;
   unsigned int balloc[2*SBLIMIT];
   unsigned int scale_index[2][SBLIMIT];
-  real fraction[2][SBLIMIT];
+  DECLARE_ALIGNED(16, real, fraction[2][SBLIMIT]);
 //  int single = fr->single;
 
 //  printf("do_layer1(0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X )\n",
diff --git a/mp3lib/layer2.c b/mp3lib/layer2.c
index cad9a482b0..a1d3fa43fe 100644
--- a/mp3lib/layer2.c
+++ b/mp3lib/layer2.c
@@ -285,7 +285,7 @@ static int do_layer2(struct frame *fr,int outmode)
   int clip=0;
   int i,j;
   int stereo = fr->stereo;
-  real fraction[2][4][SBLIMIT]; /* pick_table clears unused subbands */
+  DECLARE_ALIGNED(16, real, fraction[2][4][SBLIMIT]); /* pick_table clears unused subbands */
   unsigned int bit_alloc[64];
   int scale[192];
   int single = fr->single;
diff --git a/mp3lib/layer3.c b/mp3lib/layer3.c
index 6c1b233ca2..446044490b 100644
--- a/mp3lib/layer3.c
+++ b/mp3lib/layer3.c
@@ -1260,8 +1260,8 @@ static int do_layer3(struct frame *fr,int single){
 
   granules = (fr->lsf) ? 1 : 2;
   for (gr=0;gr<granules;gr++){
-    static real hybridIn[2][SBLIMIT][SSLIMIT];
-    static real hybridOut[2][SSLIMIT][SBLIMIT];
+    static DECLARE_ALIGNED(16, real, hybridIn[2][SBLIMIT][SSLIMIT]);
+    static DECLARE_ALIGNED(16, real, hybridOut[2][SSLIMIT][SBLIMIT]);
 
     { struct gr_info_s *gr_info = &(sideinfo.ch[0].gr[gr]);
       int part2bits;
-- 
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