libvpx: Pull from upstream

source/libvpx/vpx_dsp/x86/variance_mmx.c

Index: source/libvpx/vpx_dsp/x86/variance_mmx.c
diff --git a/source/libvpx/vpx_dsp/x86/variance_mmx.c b/source/libvpx/vpx_dsp/x86/variance_mmx.c
new file mode 100644
index 0000000000000000000000000000000000000000..99dd741bca5e61d4c29cd832381a914c1a3108a8
--- /dev/null
+++ b/source/libvpx/vpx_dsp/x86/variance_mmx.c
@@ -0,0 +1,107 @@
+/*
+ *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "./vpx_dsp_rtcd.h"
+
+extern void vpx_get4x4var_mmx(const uint8_t *a, int a_stride,
+                              const uint8_t *b, int b_stride,
+                              unsigned int *sse, int *sum);
+
+unsigned int vpx_variance4x4_mmx(const unsigned char *a, int  a_stride,
+                                 const unsigned char *b, int  b_stride,
+                                 unsigned int *sse) {
+    unsigned int var;
+    int avg;
+
+    vpx_get4x4var_mmx(a, a_stride, b, b_stride, &var, &avg);
+    *sse = var;
+    return (var - (((unsigned int)avg * avg) >> 4));
+}
+
+unsigned int vpx_variance8x8_mmx(const unsigned char *a, int  a_stride,
+                                 const unsigned char *b, int  b_stride,
+                                 unsigned int *sse) {
+    unsigned int var;
+    int avg;
+
+    vpx_get8x8var_mmx(a, a_stride, b, b_stride, &var, &avg);
+    *sse = var;
+
+    return (var - (((unsigned int)avg * avg) >> 6));
+}
+
+unsigned int vpx_mse16x16_mmx(const unsigned char *a, int  a_stride,
+                              const unsigned char *b, int  b_stride,
+                              unsigned int *sse) {
+    unsigned int sse0, sse1, sse2, sse3, var;
+    int sum0, sum1, sum2, sum3;
+
+    vpx_get8x8var_mmx(a, a_stride, b, b_stride, &sse0, &sum0);
+    vpx_get8x8var_mmx(a + 8, a_stride, b + 8, b_stride, &sse1, &sum1);
+    vpx_get8x8var_mmx(a + 8 * a_stride, a_stride,
+                      b + 8 * b_stride, b_stride, &sse2, &sum2);
+    vpx_get8x8var_mmx(a + 8 * a_stride + 8, a_stride,
+                      b + 8 * b_stride + 8, b_stride, &sse3, &sum3);
+
+    var = sse0 + sse1 + sse2 + sse3;
+    *sse = var;
+    return var;
+}
+
+unsigned int vpx_variance16x16_mmx(const unsigned char *a, int  a_stride,
+                                   const unsigned char *b, int  b_stride,
+                                   unsigned int *sse) {
+    unsigned int sse0, sse1, sse2, sse3, var;
+    int sum0, sum1, sum2, sum3, avg;
+
+    vpx_get8x8var_mmx(a, a_stride, b, b_stride, &sse0, &sum0);
+    vpx_get8x8var_mmx(a + 8, a_stride, b + 8, b_stride, &sse1, &sum1);
+    vpx_get8x8var_mmx(a + 8 * a_stride, a_stride,
+                      b + 8 * b_stride, b_stride, &sse2, &sum2);
+    vpx_get8x8var_mmx(a + 8 * a_stride + 8, a_stride,
+                      b + 8 * b_stride + 8, b_stride, &sse3, &sum3);
+
+    var = sse0 + sse1 + sse2 + sse3;
+    avg = sum0 + sum1 + sum2 + sum3;
+    *sse = var;
+    return (var - (((unsigned int)avg * avg) >> 8));
+}
+
+unsigned int vpx_variance16x8_mmx(const unsigned char *a, int  a_stride,
+                                  const unsigned char *b, int  b_stride,
+                                  unsigned int *sse) {
+    unsigned int sse0, sse1, var;
+    int sum0, sum1, avg;
+
+    vpx_get8x8var_mmx(a, a_stride, b, b_stride, &sse0, &sum0);
+    vpx_get8x8var_mmx(a + 8, a_stride, b + 8, b_stride, &sse1, &sum1);
+
+    var = sse0 + sse1;
+    avg = sum0 + sum1;
+    *sse = var;
+    return (var - (((unsigned int)avg * avg) >> 7));
+}
+
+unsigned int vpx_variance8x16_mmx(const unsigned char *a, int  a_stride,
+                                  const unsigned char *b, int  b_stride,
+                                  unsigned int *sse) {
+    unsigned int sse0, sse1, var;
+    int sum0, sum1, avg;
+
+    vpx_get8x8var_mmx(a, a_stride, b, b_stride, &sse0, &sum0);
+    vpx_get8x8var_mmx(a + 8 * a_stride, a_stride,
+                      b + 8 * b_stride, b_stride, &sse1, &sum1);
+
+    var = sse0 + sse1;
+    avg = sum0 + sum1;
+    *sse = var;
+
+    return (var - (((unsigned int)avg * avg) >> 7));
+}