Start working on a branch where FFmpeg is not copied, patched and carved to be built with automake but instead imported inline and built using its own build system. This is an import of a slightly modified FFmpeg current tree. xine-lib builds, install and run fine with it, but there are of course plenty of things that needs to be fixed before it can even be considered for a 1.2.x series. Work will continue in the next days of course.

CVS patchset: 8397
CVS date: 2006/12/02 01:19:48

1 files changed, 1591 insertions, 0 deletions

diff --git a/contrib/ffmpeg/libavcodec/ppc/dsputil_altivec.c b/contrib/ffmpeg/libavcodec/ppc/dsputil_altivec.c
new file mode 100644
index 000000000..6f48893a4
--- /dev/null
+++ b/contrib/ffmpeg/libavcodec/ppc/dsputil_altivec.c
@@ -0,0 +1,1591 @@
+/*
+ * Copyright (c) 2002 Brian Foley
+ * Copyright (c) 2002 Dieter Shirley
+ * Copyright (c) 2003-2004 Romain Dolbeau <romain@dolbeau.org>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "../dsputil.h"
+
+#include "gcc_fixes.h"
+
+#include "dsputil_altivec.h"
+
+#ifdef CONFIG_DARWIN
+#include <sys/sysctl.h>
+#else /* CONFIG_DARWIN */
+#ifdef __AMIGAOS4__
+#include <exec/exec.h>
+#include <interfaces/exec.h>
+#include <proto/exec.h>
+#else /* __AMIGAOS4__ */
+#include <signal.h>
+#include <setjmp.h>
+
+static sigjmp_buf jmpbuf;
+static volatile sig_atomic_t canjump = 0;
+
+static void sigill_handler (int sig)
+{
+    if (!canjump) {
+        signal (sig, SIG_DFL);
+        raise (sig);
+    }
+
+    canjump = 0;
+    siglongjmp (jmpbuf, 1);
+}
+#endif /* CONFIG_DARWIN */
+#endif /* __AMIGAOS4__ */
+
+int sad16_x2_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
+{
+    int i;
+    int s __attribute__((aligned(16)));
+    const_vector unsigned char zero = (const_vector unsigned char)vec_splat_u8(0);
+    vector unsigned char *tv;
+    vector unsigned char pix1v, pix2v, pix2iv, avgv, t5;
+    vector unsigned int sad;
+    vector signed int sumdiffs;
+
+    s = 0;
+    sad = (vector unsigned int)vec_splat_u32(0);
+    for(i=0;i<h;i++) {
+        /*
+           Read unaligned pixels into our vectors. The vectors are as follows:
+           pix1v: pix1[0]-pix1[15]
+           pix2v: pix2[0]-pix2[15]      pix2iv: pix2[1]-pix2[16]
+        */
+        tv = (vector unsigned char *) pix1;
+        pix1v = vec_perm(tv[0], tv[1], vec_lvsl(0, pix1));
+
+        tv = (vector unsigned char *) &pix2[0];
+        pix2v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[0]));
+
+        tv = (vector unsigned char *) &pix2[1];
+        pix2iv = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[1]));
+
+        /* Calculate the average vector */
+        avgv = vec_avg(pix2v, pix2iv);
+
+        /* Calculate a sum of abs differences vector */
+        t5 = vec_sub(vec_max(pix1v, avgv), vec_min(pix1v, avgv));
+
+        /* Add each 4 pixel group together and put 4 results into sad */
+        sad = vec_sum4s(t5, sad);
+
+        pix1 += line_size;
+        pix2 += line_size;
+    }
+    /* Sum up the four partial sums, and put the result into s */
+    sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
+    sumdiffs = vec_splat(sumdiffs, 3);
+    vec_ste(sumdiffs, 0, &s);
+
+    return s;
+}
+
+int sad16_y2_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
+{
+    int i;
+    int s __attribute__((aligned(16)));
+    const_vector unsigned char zero = (const_vector unsigned char)vec_splat_u8(0);
+    vector unsigned char *tv;
+    vector unsigned char pix1v, pix2v, pix3v, avgv, t5;
+    vector unsigned int sad;
+    vector signed int sumdiffs;
+    uint8_t *pix3 = pix2 + line_size;
+
+    s = 0;
+    sad = (vector unsigned int)vec_splat_u32(0);
+
+    /*
+       Due to the fact that pix3 = pix2 + line_size, the pix3 of one
+       iteration becomes pix2 in the next iteration. We can use this
+       fact to avoid a potentially expensive unaligned read, each
+       time around the loop.
+       Read unaligned pixels into our vectors. The vectors are as follows:
+       pix2v: pix2[0]-pix2[15]
+       Split the pixel vectors into shorts
+    */
+    tv = (vector unsigned char *) &pix2[0];
+    pix2v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[0]));
+
+    for(i=0;i<h;i++) {
+        /*
+           Read unaligned pixels into our vectors. The vectors are as follows:
+           pix1v: pix1[0]-pix1[15]
+           pix3v: pix3[0]-pix3[15]
+        */
+        tv = (vector unsigned char *) pix1;
+        pix1v = vec_perm(tv[0], tv[1], vec_lvsl(0, pix1));
+
+        tv = (vector unsigned char *) &pix3[0];
+        pix3v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix3[0]));
+
+        /* Calculate the average vector */
+        avgv = vec_avg(pix2v, pix3v);
+
+        /* Calculate a sum of abs differences vector */
+        t5 = vec_sub(vec_max(pix1v, avgv), vec_min(pix1v, avgv));
+
+        /* Add each 4 pixel group together and put 4 results into sad */
+        sad = vec_sum4s(t5, sad);
+
+        pix1 += line_size;
+        pix2v = pix3v;
+        pix3 += line_size;
+
+    }
+
+    /* Sum up the four partial sums, and put the result into s */
+    sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
+    sumdiffs = vec_splat(sumdiffs, 3);
+    vec_ste(sumdiffs, 0, &s);
+    return s;
+}
+
+int sad16_xy2_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
+{
+    int i;
+    int s __attribute__((aligned(16)));
+    uint8_t *pix3 = pix2 + line_size;
+    const_vector unsigned char zero = (const_vector unsigned char)vec_splat_u8(0);
+    const_vector unsigned short two = (const_vector unsigned short)vec_splat_u16(2);
+    vector unsigned char *tv, avgv, t5;
+    vector unsigned char pix1v, pix2v, pix3v, pix2iv, pix3iv;
+    vector unsigned short pix2lv, pix2hv, pix2ilv, pix2ihv;
+    vector unsigned short pix3lv, pix3hv, pix3ilv, pix3ihv;
+    vector unsigned short avghv, avglv;
+    vector unsigned short t1, t2, t3, t4;
+    vector unsigned int sad;
+    vector signed int sumdiffs;
+
+    sad = (vector unsigned int)vec_splat_u32(0);
+
+    s = 0;
+
+    /*
+       Due to the fact that pix3 = pix2 + line_size, the pix3 of one
+       iteration becomes pix2 in the next iteration. We can use this
+       fact to avoid a potentially expensive unaligned read, as well
+       as some splitting, and vector addition each time around the loop.
+       Read unaligned pixels into our vectors. The vectors are as follows:
+       pix2v: pix2[0]-pix2[15]  pix2iv: pix2[1]-pix2[16]
+       Split the pixel vectors into shorts
+    */
+    tv = (vector unsigned char *) &pix2[0];
+    pix2v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[0]));
+
+    tv = (vector unsigned char *) &pix2[1];
+    pix2iv = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[1]));
+
+    pix2hv = (vector unsigned short) vec_mergeh(zero, pix2v);
+    pix2lv = (vector unsigned short) vec_mergel(zero, pix2v);
+    pix2ihv = (vector unsigned short) vec_mergeh(zero, pix2iv);
+    pix2ilv = (vector unsigned short) vec_mergel(zero, pix2iv);
+    t1 = vec_add(pix2hv, pix2ihv);
+    t2 = vec_add(pix2lv, pix2ilv);
+
+    for(i=0;i<h;i++) {
+        /*
+           Read unaligned pixels into our vectors. The vectors are as follows:
+           pix1v: pix1[0]-pix1[15]
+           pix3v: pix3[0]-pix3[15]      pix3iv: pix3[1]-pix3[16]
+        */
+        tv = (vector unsigned char *) pix1;
+        pix1v = vec_perm(tv[0], tv[1], vec_lvsl(0, pix1));
+
+        tv = (vector unsigned char *) &pix3[0];
+        pix3v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix3[0]));
+
+        tv = (vector unsigned char *) &pix3[1];
+        pix3iv = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix3[1]));
+
+        /*
+          Note that Altivec does have vec_avg, but this works on vector pairs
+          and rounds up. We could do avg(avg(a,b),avg(c,d)), but the rounding
+          would mean that, for example, avg(3,0,0,1) = 2, when it should be 1.
+          Instead, we have to split the pixel vectors into vectors of shorts,
+          and do the averaging by hand.
+        */
+
+        /* Split the pixel vectors into shorts */
+        pix3hv = (vector unsigned short) vec_mergeh(zero, pix3v);
+        pix3lv = (vector unsigned short) vec_mergel(zero, pix3v);
+        pix3ihv = (vector unsigned short) vec_mergeh(zero, pix3iv);
+        pix3ilv = (vector unsigned short) vec_mergel(zero, pix3iv);
+
+        /* Do the averaging on them */
+        t3 = vec_add(pix3hv, pix3ihv);
+        t4 = vec_add(pix3lv, pix3ilv);
+
+        avghv = vec_sr(vec_add(vec_add(t1, t3), two), two);
+        avglv = vec_sr(vec_add(vec_add(t2, t4), two), two);
+
+        /* Pack the shorts back into a result */
+        avgv = vec_pack(avghv, avglv);
+
+        /* Calculate a sum of abs differences vector */
+        t5 = vec_sub(vec_max(pix1v, avgv), vec_min(pix1v, avgv));
+
+        /* Add each 4 pixel group together and put 4 results into sad */
+        sad = vec_sum4s(t5, sad);
+
+        pix1 += line_size;
+        pix3 += line_size;
+        /* Transfer the calculated values for pix3 into pix2 */
+        t1 = t3;
+        t2 = t4;
+    }
+    /* Sum up the four partial sums, and put the result into s */
+    sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
+    sumdiffs = vec_splat(sumdiffs, 3);
+    vec_ste(sumdiffs, 0, &s);
+
+    return s;
+}
+
+int sad16_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
+{
+    int i;
+    int s __attribute__((aligned(16)));
+    const_vector unsigned int zero = (const_vector unsigned int)vec_splat_u32(0);
+    vector unsigned char perm1, perm2, *pix1v, *pix2v;
+    vector unsigned char t1, t2, t3,t4, t5;
+    vector unsigned int sad;
+    vector signed int sumdiffs;
+
+    sad = (vector unsigned int)vec_splat_u32(0);
+
+
+    for(i=0;i<h;i++) {
+        /* Read potentially unaligned pixels into t1 and t2 */
+        perm1 = vec_lvsl(0, pix1);
+        pix1v = (vector unsigned char *) pix1;
+        perm2 = vec_lvsl(0, pix2);
+        pix2v = (vector unsigned char *) pix2;
+        t1 = vec_perm(pix1v[0], pix1v[1], perm1);
+        t2 = vec_perm(pix2v[0], pix2v[1], perm2);
+
+        /* Calculate a sum of abs differences vector */
+        t3 = vec_max(t1, t2);
+        t4 = vec_min(t1, t2);
+        t5 = vec_sub(t3, t4);
+
+        /* Add each 4 pixel group together and put 4 results into sad */
+        sad = vec_sum4s(t5, sad);
+
+        pix1 += line_size;
+        pix2 += line_size;
+    }
+
+    /* Sum up the four partial sums, and put the result into s */
+    sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
+    sumdiffs = vec_splat(sumdiffs, 3);
+    vec_ste(sumdiffs, 0, &s);
+
+    return s;
+}
+
+int sad8_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
+{
+    int i;
+    int s __attribute__((aligned(16)));
+    const_vector unsigned int zero = (const_vector unsigned int)vec_splat_u32(0);
+    vector unsigned char perm1, perm2, permclear, *pix1v, *pix2v;
+    vector unsigned char t1, t2, t3,t4, t5;
+    vector unsigned int sad;
+    vector signed int sumdiffs;
+
+    sad = (vector unsigned int)vec_splat_u32(0);
+
+    permclear = (vector unsigned char)AVV(255,255,255,255,255,255,255,255,0,0,0,0,0,0,0,0);
+
+    for(i=0;i<h;i++) {
+        /* Read potentially unaligned pixels into t1 and t2
+           Since we're reading 16 pixels, and actually only want 8,
+           mask out the last 8 pixels. The 0s don't change the sum. */
+        perm1 = vec_lvsl(0, pix1);
+        pix1v = (vector unsigned char *) pix1;
+        perm2 = vec_lvsl(0, pix2);
+        pix2v = (vector unsigned char *) pix2;
+        t1 = vec_and(vec_perm(pix1v[0], pix1v[1], perm1), permclear);
+        t2 = vec_and(vec_perm(pix2v[0], pix2v[1], perm2), permclear);
+
+        /* Calculate a sum of abs differences vector */
+        t3 = vec_max(t1, t2);
+        t4 = vec_min(t1, t2);
+        t5 = vec_sub(t3, t4);
+
+        /* Add each 4 pixel group together and put 4 results into sad */
+        sad = vec_sum4s(t5, sad);
+
+        pix1 += line_size;
+        pix2 += line_size;
+    }
+
+    /* Sum up the four partial sums, and put the result into s */
+    sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
+    sumdiffs = vec_splat(sumdiffs, 3);
+    vec_ste(sumdiffs, 0, &s);
+
+    return s;
+}
+
+int pix_norm1_altivec(uint8_t *pix, int line_size)
+{
+    int i;
+    int s __attribute__((aligned(16)));
+    const_vector unsigned int zero = (const_vector unsigned int)vec_splat_u32(0);
+    vector unsigned char *tv;
+    vector unsigned char pixv;
+    vector unsigned int sv;
+    vector signed int sum;
+
+    sv = (vector unsigned int)vec_splat_u32(0);
+
+    s = 0;
+    for (i = 0; i < 16; i++) {
+        /* Read in the potentially unaligned pixels */
+        tv = (vector unsigned char *) pix;
+        pixv = vec_perm(tv[0], tv[1], vec_lvsl(0, pix));
+
+        /* Square the values, and add them to our sum */
+        sv = vec_msum(pixv, pixv, sv);
+
+        pix += line_size;
+    }
+    /* Sum up the four partial sums, and put the result into s */
+    sum = vec_sums((vector signed int) sv, (vector signed int) zero);
+    sum = vec_splat(sum, 3);
+    vec_ste(sum, 0, &s);
+
+    return s;
+}
+
+/**
+ * Sum of Squared Errors for a 8x8 block.
+ * AltiVec-enhanced.
+ * It's the sad8_altivec code above w/ squaring added.
+ */
+int sse8_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
+{
+    int i;
+    int s __attribute__((aligned(16)));
+    const_vector unsigned int zero = (const_vector unsigned int)vec_splat_u32(0);
+    vector unsigned char perm1, perm2, permclear, *pix1v, *pix2v;
+    vector unsigned char t1, t2, t3,t4, t5;
+    vector unsigned int sum;
+    vector signed int sumsqr;
+
+    sum = (vector unsigned int)vec_splat_u32(0);
+
+    permclear = (vector unsigned char)AVV(255,255,255,255,255,255,255,255,0,0,0,0,0,0,0,0);
+
+
+    for(i=0;i<h;i++) {
+        /* Read potentially unaligned pixels into t1 and t2
+           Since we're reading 16 pixels, and actually only want 8,
+           mask out the last 8 pixels. The 0s don't change the sum. */
+        perm1 = vec_lvsl(0, pix1);
+        pix1v = (vector unsigned char *) pix1;
+        perm2 = vec_lvsl(0, pix2);
+        pix2v = (vector unsigned char *) pix2;
+        t1 = vec_and(vec_perm(pix1v[0], pix1v[1], perm1), permclear);
+        t2 = vec_and(vec_perm(pix2v[0], pix2v[1], perm2), permclear);
+
+        /*
+          Since we want to use unsigned chars, we can take advantage
+          of the fact that abs(a-b)^2 = (a-b)^2.
+        */
+
+        /* Calculate abs differences vector */
+        t3 = vec_max(t1, t2);
+        t4 = vec_min(t1, t2);
+        t5 = vec_sub(t3, t4);
+
+        /* Square the values and add them to our sum */
+        sum = vec_msum(t5, t5, sum);
+
+        pix1 += line_size;
+        pix2 += line_size;
+    }
+
+    /* Sum up the four partial sums, and put the result into s */
+    sumsqr = vec_sums((vector signed int) sum, (vector signed int) zero);
+    sumsqr = vec_splat(sumsqr, 3);
+    vec_ste(sumsqr, 0, &s);
+
+    return s;
+}
+
+/**
+ * Sum of Squared Errors for a 16x16 block.
+ * AltiVec-enhanced.
+ * It's the sad16_altivec code above w/ squaring added.
+ */
+int sse16_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
+{
+    int i;
+    int s __attribute__((aligned(16)));
+    const_vector unsigned int zero = (const_vector unsigned int)vec_splat_u32(0);
+    vector unsigned char perm1, perm2, *pix1v, *pix2v;
+    vector unsigned char t1, t2, t3,t4, t5;
+    vector unsigned int sum;
+    vector signed int sumsqr;
+
+    sum = (vector unsigned int)vec_splat_u32(0);
+
+    for(i=0;i<h;i++) {
+        /* Read potentially unaligned pixels into t1 and t2 */
+        perm1 = vec_lvsl(0, pix1);
+        pix1v = (vector unsigned char *) pix1;
+        perm2 = vec_lvsl(0, pix2);
+        pix2v = (vector unsigned char *) pix2;
+        t1 = vec_perm(pix1v[0], pix1v[1], perm1);
+        t2 = vec_perm(pix2v[0], pix2v[1], perm2);
+
+        /*
+          Since we want to use unsigned chars, we can take advantage
+          of the fact that abs(a-b)^2 = (a-b)^2.
+        */
+
+        /* Calculate abs differences vector */
+        t3 = vec_max(t1, t2);
+        t4 = vec_min(t1, t2);
+        t5 = vec_sub(t3, t4);
+
+        /* Square the values and add them to our sum */
+        sum = vec_msum(t5, t5, sum);
+
+        pix1 += line_size;
+        pix2 += line_size;
+    }
+
+    /* Sum up the four partial sums, and put the result into s */
+    sumsqr = vec_sums((vector signed int) sum, (vector signed int) zero);
+    sumsqr = vec_splat(sumsqr, 3);
+    vec_ste(sumsqr, 0, &s);
+
+    return s;
+}
+
+int pix_sum_altivec(uint8_t * pix, int line_size)
+{
+    const_vector unsigned int zero = (const_vector unsigned int)vec_splat_u32(0);
+    vector unsigned char perm, *pixv;
+    vector unsigned char t1;
+    vector unsigned int sad;
+    vector signed int sumdiffs;
+
+    int i;
+    int s __attribute__((aligned(16)));
+
+    sad = (vector unsigned int)vec_splat_u32(0);
+
+    for (i = 0; i < 16; i++) {
+        /* Read the potentially unaligned 16 pixels into t1 */
+        perm = vec_lvsl(0, pix);
+        pixv = (vector unsigned char *) pix;
+        t1 = vec_perm(pixv[0], pixv[1], perm);
+
+        /* Add each 4 pixel group together and put 4 results into sad */
+        sad = vec_sum4s(t1, sad);
+
+        pix += line_size;
+    }
+
+    /* Sum up the four partial sums, and put the result into s */
+    sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
+    sumdiffs = vec_splat(sumdiffs, 3);
+    vec_ste(sumdiffs, 0, &s);
+
+    return s;
+}
+
+void get_pixels_altivec(DCTELEM *restrict block, const uint8_t *pixels, int line_size)
+{
+    int i;
+    vector unsigned char perm, bytes, *pixv;
+    const_vector unsigned char zero = (const_vector unsigned char)vec_splat_u8(0);
+    vector signed short shorts;
+
+    for(i=0;i<8;i++)
+    {
+        // Read potentially unaligned pixels.
+        // We're reading 16 pixels, and actually only want 8,
+        // but we simply ignore the extras.
+        perm = vec_lvsl(0, pixels);
+        pixv = (vector unsigned char *) pixels;
+        bytes = vec_perm(pixv[0], pixv[1], perm);
+
+        // convert the bytes into shorts
+        shorts = (vector signed short)vec_mergeh(zero, bytes);
+
+        // save the data to the block, we assume the block is 16-byte aligned
+        vec_st(shorts, i*16, (vector signed short*)block);
+
+        pixels += line_size;
+    }
+}
+
+void diff_pixels_altivec(DCTELEM *restrict block, const uint8_t *s1,
+        const uint8_t *s2, int stride)
+{
+    int i;
+    vector unsigned char perm, bytes, *pixv;
+    const_vector unsigned char zero = (const_vector unsigned char)vec_splat_u8(0);
+    vector signed short shorts1, shorts2;
+
+    for(i=0;i<4;i++)
+    {
+        // Read potentially unaligned pixels
+        // We're reading 16 pixels, and actually only want 8,
+        // but we simply ignore the extras.
+        perm = vec_lvsl(0, s1);
+        pixv = (vector unsigned char *) s1;
+        bytes = vec_perm(pixv[0], pixv[1], perm);
+
+        // convert the bytes into shorts
+        shorts1 = (vector signed short)vec_mergeh(zero, bytes);
+
+        // Do the same for the second block of pixels
+        perm = vec_lvsl(0, s2);
+        pixv = (vector unsigned char *) s2;
+        bytes = vec_perm(pixv[0], pixv[1], perm);
+
+        // convert the bytes into shorts
+        shorts2 = (vector signed short)vec_mergeh(zero, bytes);
+
+        // Do the subtraction
+        shorts1 = vec_sub(shorts1, shorts2);
+
+        // save the data to the block, we assume the block is 16-byte aligned
+        vec_st(shorts1, 0, (vector signed short*)block);
+
+        s1 += stride;
+        s2 += stride;
+        block += 8;
+
+
+        // The code below is a copy of the code above... This is a manual
+        // unroll.
+
+        // Read potentially unaligned pixels
+        // We're reading 16 pixels, and actually only want 8,
+        // but we simply ignore the extras.
+        perm = vec_lvsl(0, s1);
+        pixv = (vector unsigned char *) s1;
+        bytes = vec_perm(pixv[0], pixv[1], perm);
+
+        // convert the bytes into shorts
+        shorts1 = (vector signed short)vec_mergeh(zero, bytes);
+
+        // Do the same for the second block of pixels
+        perm = vec_lvsl(0, s2);
+        pixv = (vector unsigned char *) s2;
+        bytes = vec_perm(pixv[0], pixv[1], perm);
+
+        // convert the bytes into shorts
+        shorts2 = (vector signed short)vec_mergeh(zero, bytes);
+
+        // Do the subtraction
+        shorts1 = vec_sub(shorts1, shorts2);
+
+        // save the data to the block, we assume the block is 16-byte aligned
+        vec_st(shorts1, 0, (vector signed short*)block);
+
+        s1 += stride;
+        s2 += stride;
+        block += 8;
+    }
+}
+
+void add_bytes_altivec(uint8_t *dst, uint8_t *src, int w) {
+    register int i;
+    register vector unsigned char vdst, vsrc;
+
+    /* dst and src are 16 bytes-aligned (guaranteed) */
+    for(i = 0 ; (i + 15) < w ; i+=16)
+    {
+      vdst = vec_ld(i, (unsigned char*)dst);
+      vsrc = vec_ld(i, (unsigned char*)src);
+      vdst = vec_add(vsrc, vdst);
+      vec_st(vdst, i, (unsigned char*)dst);
+    }
+    /* if w is not a multiple of 16 */
+    for (; (i < w) ; i++)
+    {
+      dst[i] = src[i];
+    }
+}
+
+/* next one assumes that ((line_size % 16) == 0) */
+void put_pixels16_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)
+{
+POWERPC_PERF_DECLARE(altivec_put_pixels16_num, 1);
+    register vector unsigned char pixelsv1, pixelsv2;
+    register vector unsigned char pixelsv1B, pixelsv2B;
+    register vector unsigned char pixelsv1C, pixelsv2C;
+    register vector unsigned char pixelsv1D, pixelsv2D;
+
+    register vector unsigned char perm = vec_lvsl(0, pixels);
+    int i;
+    register int line_size_2 = line_size << 1;
+    register int line_size_3 = line_size + line_size_2;
+    register int line_size_4 = line_size << 2;
+
+POWERPC_PERF_START_COUNT(altivec_put_pixels16_num, 1);
+// hand-unrolling the loop by 4 gains about 15%
+// mininum execution time goes from 74 to 60 cycles
+// it's faster than -funroll-loops, but using
+// -funroll-loops w/ this is bad - 74 cycles again.
+// all this is on a 7450, tuning for the 7450
+#if 0
+    for(i=0; i<h; i++) {
+      pixelsv1 = vec_ld(0, (unsigned char*)pixels);
+      pixelsv2 = vec_ld(16, (unsigned char*)pixels);
+      vec_st(vec_perm(pixelsv1, pixelsv2, perm),
+             0, (unsigned char*)block);
+      pixels+=line_size;
+      block +=line_size;
+    }
+#else
+    for(i=0; i<h; i+=4) {
+      pixelsv1 = vec_ld(0, (unsigned char*)pixels);
+      pixelsv2 = vec_ld(15, (unsigned char*)pixels);
+      pixelsv1B = vec_ld(line_size, (unsigned char*)pixels);
+      pixelsv2B = vec_ld(15 + line_size, (unsigned char*)pixels);
+      pixelsv1C = vec_ld(line_size_2, (unsigned char*)pixels);
+      pixelsv2C = vec_ld(15 + line_size_2, (unsigned char*)pixels);
+      pixelsv1D = vec_ld(line_size_3, (unsigned char*)pixels);
+      pixelsv2D = vec_ld(15 + line_size_3, (unsigned char*)pixels);
+      vec_st(vec_perm(pixelsv1, pixelsv2, perm),
+             0, (unsigned char*)block);
+      vec_st(vec_perm(pixelsv1B, pixelsv2B, perm),
+             line_size, (unsigned char*)block);
+      vec_st(vec_perm(pixelsv1C, pixelsv2C, perm),
+             line_size_2, (unsigned char*)block);
+      vec_st(vec_perm(pixelsv1D, pixelsv2D, perm),
+             line_size_3, (unsigned char*)block);
+      pixels+=line_size_4;
+      block +=line_size_4;
+    }
+#endif
+POWERPC_PERF_STOP_COUNT(altivec_put_pixels16_num, 1);
+}
+
+/* next one assumes that ((line_size % 16) == 0) */
+#define op_avg(a,b)  a = ( ((a)|(b)) - ((((a)^(b))&0xFEFEFEFEUL)>>1) )
+void avg_pixels16_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)
+{
+POWERPC_PERF_DECLARE(altivec_avg_pixels16_num, 1);
+    register vector unsigned char pixelsv1, pixelsv2, pixelsv, blockv;
+    register vector unsigned char perm = vec_lvsl(0, pixels);
+    int i;
+
+POWERPC_PERF_START_COUNT(altivec_avg_pixels16_num, 1);
+
+    for(i=0; i<h; i++) {
+      pixelsv1 = vec_ld(0, (unsigned char*)pixels);
+      pixelsv2 = vec_ld(16, (unsigned char*)pixels);
+      blockv = vec_ld(0, block);
+      pixelsv = vec_perm(pixelsv1, pixelsv2, perm);
+      blockv = vec_avg(blockv,pixelsv);
+      vec_st(blockv, 0, (unsigned char*)block);
+      pixels+=line_size;
+      block +=line_size;
+    }
+
+POWERPC_PERF_STOP_COUNT(altivec_avg_pixels16_num, 1);
+}
+
+/* next one assumes that ((line_size % 8) == 0) */
+void avg_pixels8_altivec(uint8_t * block, const uint8_t * pixels, int line_size, int h)
+{
+POWERPC_PERF_DECLARE(altivec_avg_pixels8_num, 1);
+    register vector unsigned char pixelsv1, pixelsv2, pixelsv, blockv;
+    int i;
+
+POWERPC_PERF_START_COUNT(altivec_avg_pixels8_num, 1);
+
+   for (i = 0; i < h; i++) {
+     /*
+       block is 8 bytes-aligned, so we're either in the
+       left block (16 bytes-aligned) or in the right block (not)
+     */
+     int rightside = ((unsigned long)block & 0x0000000F);
+
+     blockv = vec_ld(0, block);
+     pixelsv1 = vec_ld(0, (unsigned char*)pixels);
+     pixelsv2 = vec_ld(16, (unsigned char*)pixels);
+     pixelsv = vec_perm(pixelsv1, pixelsv2, vec_lvsl(0, pixels));
+
+     if (rightside)
+     {
+       pixelsv = vec_perm(blockv, pixelsv, vcprm(0,1,s0,s1));
+     }
+     else
+     {
+       pixelsv = vec_perm(blockv, pixelsv, vcprm(s0,s1,2,3));
+     }
+
+     blockv = vec_avg(blockv, pixelsv);
+
+     vec_st(blockv, 0, block);
+
+     pixels += line_size;
+     block += line_size;
+   }
+
+POWERPC_PERF_STOP_COUNT(altivec_avg_pixels8_num, 1);
+}
+
+/* next one assumes that ((line_size % 8) == 0) */
+void put_pixels8_xy2_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)
+{
+POWERPC_PERF_DECLARE(altivec_put_pixels8_xy2_num, 1);
+   register int i;
+   register vector unsigned char
+     pixelsv1, pixelsv2,
+     pixelsavg;
+   register vector unsigned char
+     blockv, temp1, temp2;
+   register vector unsigned short
+     pixelssum1, pixelssum2, temp3;
+   register const_vector unsigned char vczero = (const_vector unsigned char)vec_splat_u8(0);
+   register const_vector unsigned short vctwo = (const_vector unsigned short)vec_splat_u16(2);
+
+   temp1 = vec_ld(0, pixels);
+   temp2 = vec_ld(16, pixels);
+   pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(0, pixels));
+   if ((((unsigned long)pixels) & 0x0000000F) ==  0x0000000F)
+   {
+     pixelsv2 = temp2;
+   }
+   else
+   {
+     pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(1, pixels));
+   }
+   pixelsv1 = vec_mergeh(vczero, pixelsv1);
+   pixelsv2 = vec_mergeh(vczero, pixelsv2);
+   pixelssum1 = vec_add((vector unsigned short)pixelsv1,
+                        (vector unsigned short)pixelsv2);
+   pixelssum1 = vec_add(pixelssum1, vctwo);
+
+POWERPC_PERF_START_COUNT(altivec_put_pixels8_xy2_num, 1);
+   for (i = 0; i < h ; i++) {
+     int rightside = ((unsigned long)block & 0x0000000F);
+     blockv = vec_ld(0, block);
+
+     temp1 = vec_ld(line_size, pixels);
+     temp2 = vec_ld(line_size + 16, pixels);
+     pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(line_size, pixels));
+     if (((((unsigned long)pixels) + line_size) & 0x0000000F) ==  0x0000000F)
+     {
+       pixelsv2 = temp2;
+     }
+     else
+     {
+       pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(line_size + 1, pixels));
+     }
+
+     pixelsv1 = vec_mergeh(vczero, pixelsv1);
+     pixelsv2 = vec_mergeh(vczero, pixelsv2);
+     pixelssum2 = vec_add((vector unsigned short)pixelsv1,
+                          (vector unsigned short)pixelsv2);
+     temp3 = vec_add(pixelssum1, pixelssum2);
+     temp3 = vec_sra(temp3, vctwo);
+     pixelssum1 = vec_add(pixelssum2, vctwo);
+     pixelsavg = vec_packsu(temp3, (vector unsigned short) vczero);
+
+     if (rightside)
+     {
+       blockv = vec_perm(blockv, pixelsavg, vcprm(0, 1, s0, s1));
+     }
+     else
+     {
+       blockv = vec_perm(blockv, pixelsavg, vcprm(s0, s1, 2, 3));
+     }
+
+     vec_st(blockv, 0, block);
+
+     block += line_size;
+     pixels += line_size;
+   }
+
+POWERPC_PERF_STOP_COUNT(altivec_put_pixels8_xy2_num, 1);
+}
+
+/* next one assumes that ((line_size % 8) == 0) */
+void put_no_rnd_pixels8_xy2_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)
+{
+POWERPC_PERF_DECLARE(altivec_put_no_rnd_pixels8_xy2_num, 1);
+   register int i;
+   register vector unsigned char
+     pixelsv1, pixelsv2,
+     pixelsavg;
+   register vector unsigned char
+     blockv, temp1, temp2;
+   register vector unsigned short
+     pixelssum1, pixelssum2, temp3;
+   register const_vector unsigned char vczero = (const_vector unsigned char)vec_splat_u8(0);
+   register const_vector unsigned short vcone = (const_vector unsigned short)vec_splat_u16(1);
+   register const_vector unsigned short vctwo = (const_vector unsigned short)vec_splat_u16(2);
+
+   temp1 = vec_ld(0, pixels);
+   temp2 = vec_ld(16, pixels);
+   pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(0, pixels));
+   if ((((unsigned long)pixels) & 0x0000000F) ==  0x0000000F)
+   {
+     pixelsv2 = temp2;
+   }
+   else
+   {
+     pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(1, pixels));
+   }
+   pixelsv1 = vec_mergeh(vczero, pixelsv1);
+   pixelsv2 = vec_mergeh(vczero, pixelsv2);
+   pixelssum1 = vec_add((vector unsigned short)pixelsv1,
+                        (vector unsigned short)pixelsv2);
+   pixelssum1 = vec_add(pixelssum1, vcone);
+
+POWERPC_PERF_START_COUNT(altivec_put_no_rnd_pixels8_xy2_num, 1);
+   for (i = 0; i < h ; i++) {
+     int rightside = ((unsigned long)block & 0x0000000F);
+     blockv = vec_ld(0, block);
+
+     temp1 = vec_ld(line_size, pixels);
+     temp2 = vec_ld(line_size + 16, pixels);
+     pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(line_size, pixels));
+     if (((((unsigned long)pixels) + line_size) & 0x0000000F) ==  0x0000000F)
+     {
+       pixelsv2 = temp2;
+     }
+     else
+     {
+       pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(line_size + 1, pixels));
+     }
+
+     pixelsv1 = vec_mergeh(vczero, pixelsv1);
+     pixelsv2 = vec_mergeh(vczero, pixelsv2);
+     pixelssum2 = vec_add((vector unsigned short)pixelsv1,
+                          (vector unsigned short)pixelsv2);
+     temp3 = vec_add(pixelssum1, pixelssum2);
+     temp3 = vec_sra(temp3, vctwo);
+     pixelssum1 = vec_add(pixelssum2, vcone);
+     pixelsavg = vec_packsu(temp3, (vector unsigned short) vczero);
+
+     if (rightside)
+     {
+       blockv = vec_perm(blockv, pixelsavg, vcprm(0, 1, s0, s1));
+     }
+     else
+     {
+       blockv = vec_perm(blockv, pixelsavg, vcprm(s0, s1, 2, 3));
+     }
+
+     vec_st(blockv, 0, block);
+
+     block += line_size;
+     pixels += line_size;
+   }
+
+POWERPC_PERF_STOP_COUNT(altivec_put_no_rnd_pixels8_xy2_num, 1);
+}
+
+/* next one assumes that ((line_size % 16) == 0) */
+void put_pixels16_xy2_altivec(uint8_t * block, const uint8_t * pixels, int line_size, int h)
+{
+POWERPC_PERF_DECLARE(altivec_put_pixels16_xy2_num, 1);
+   register int i;
+   register vector unsigned char
+     pixelsv1, pixelsv2, pixelsv3, pixelsv4;
+   register vector unsigned char
+     blockv, temp1, temp2;
+   register vector unsigned short
+     pixelssum1, pixelssum2, temp3,
+     pixelssum3, pixelssum4, temp4;
+   register const_vector unsigned char vczero = (const_vector unsigned char)vec_splat_u8(0);
+   register const_vector unsigned short vctwo = (const_vector unsigned short)vec_splat_u16(2);
+
+POWERPC_PERF_START_COUNT(altivec_put_pixels16_xy2_num, 1);
+
+   temp1 = vec_ld(0, pixels);
+   temp2 = vec_ld(16, pixels);
+   pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(0, pixels));
+   if ((((unsigned long)pixels) & 0x0000000F) ==  0x0000000F)
+   {
+     pixelsv2 = temp2;
+   }
+   else
+   {
+     pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(1, pixels));
+   }
+   pixelsv3 = vec_mergel(vczero, pixelsv1);
+   pixelsv4 = vec_mergel(vczero, pixelsv2);
+   pixelsv1 = vec_mergeh(vczero, pixelsv1);
+   pixelsv2 = vec_mergeh(vczero, pixelsv2);
+   pixelssum3 = vec_add((vector unsigned short)pixelsv3,
+                        (vector unsigned short)pixelsv4);
+   pixelssum3 = vec_add(pixelssum3, vctwo);
+   pixelssum1 = vec_add((vector unsigned short)pixelsv1,
+                        (vector unsigned short)pixelsv2);
+   pixelssum1 = vec_add(pixelssum1, vctwo);
+
+   for (i = 0; i < h ; i++) {
+     blockv = vec_ld(0, block);
+
+     temp1 = vec_ld(line_size, pixels);
+     temp2 = vec_ld(line_size + 16, pixels);
+     pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(line_size, pixels));
+     if (((((unsigned long)pixels) + line_size) & 0x0000000F) ==  0x0000000F)
+     {
+       pixelsv2 = temp2;
+     }
+     else
+     {
+       pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(line_size + 1, pixels));
+     }
+
+     pixelsv3 = vec_mergel(vczero, pixelsv1);
+     pixelsv4 = vec_mergel(vczero, pixelsv2);
+     pixelsv1 = vec_mergeh(vczero, pixelsv1);
+     pixelsv2 = vec_mergeh(vczero, pixelsv2);
+
+     pixelssum4 = vec_add((vector unsigned short)pixelsv3,
+                          (vector unsigned short)pixelsv4);
+     pixelssum2 = vec_add((vector unsigned short)pixelsv1,
+                          (vector unsigned short)pixelsv2);
+     temp4 = vec_add(pixelssum3, pixelssum4);
+     temp4 = vec_sra(temp4, vctwo);
+     temp3 = vec_add(pixelssum1, pixelssum2);
+     temp3 = vec_sra(temp3, vctwo);
+
+     pixelssum3 = vec_add(pixelssum4, vctwo);
+     pixelssum1 = vec_add(pixelssum2, vctwo);
+
+     blockv = vec_packsu(temp3, temp4);
+
+     vec_st(blockv, 0, block);
+
+     block += line_size;
+     pixels += line_size;
+   }
+
+POWERPC_PERF_STOP_COUNT(altivec_put_pixels16_xy2_num, 1);
+}
+
+/* next one assumes that ((line_size % 16) == 0) */
+void put_no_rnd_pixels16_xy2_altivec(uint8_t * block, const uint8_t * pixels, int line_size, int h)
+{
+POWERPC_PERF_DECLARE(altivec_put_no_rnd_pixels16_xy2_num, 1);
+   register int i;
+   register vector unsigned char
+     pixelsv1, pixelsv2, pixelsv3, pixelsv4;
+   register vector unsigned char
+     blockv, temp1, temp2;
+   register vector unsigned short
+     pixelssum1, pixelssum2, temp3,
+     pixelssum3, pixelssum4, temp4;
+   register const_vector unsigned char vczero = (const_vector unsigned char)vec_splat_u8(0);
+   register const_vector unsigned short vcone = (const_vector unsigned short)vec_splat_u16(1);
+   register const_vector unsigned short vctwo = (const_vector unsigned short)vec_splat_u16(2);
+
+POWERPC_PERF_START_COUNT(altivec_put_no_rnd_pixels16_xy2_num, 1);
+
+   temp1 = vec_ld(0, pixels);
+   temp2 = vec_ld(16, pixels);
+   pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(0, pixels));
+   if ((((unsigned long)pixels) & 0x0000000F) ==  0x0000000F)
+   {
+     pixelsv2 = temp2;
+   }
+   else
+   {
+     pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(1, pixels));
+   }
+   pixelsv3 = vec_mergel(vczero, pixelsv1);
+   pixelsv4 = vec_mergel(vczero, pixelsv2);
+   pixelsv1 = vec_mergeh(vczero, pixelsv1);
+   pixelsv2 = vec_mergeh(vczero, pixelsv2);
+   pixelssum3 = vec_add((vector unsigned short)pixelsv3,
+                        (vector unsigned short)pixelsv4);
+   pixelssum3 = vec_add(pixelssum3, vcone);
+   pixelssum1 = vec_add((vector unsigned short)pixelsv1,
+                        (vector unsigned short)pixelsv2);
+   pixelssum1 = vec_add(pixelssum1, vcone);
+
+   for (i = 0; i < h ; i++) {
+     blockv = vec_ld(0, block);
+
+     temp1 = vec_ld(line_size, pixels);
+     temp2 = vec_ld(line_size + 16, pixels);
+     pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(line_size, pixels));
+     if (((((unsigned long)pixels) + line_size) & 0x0000000F) ==  0x0000000F)
+     {
+       pixelsv2 = temp2;
+     }
+     else
+     {
+       pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(line_size + 1, pixels));
+     }
+
+     pixelsv3 = vec_mergel(vczero, pixelsv1);
+     pixelsv4 = vec_mergel(vczero, pixelsv2);
+     pixelsv1 = vec_mergeh(vczero, pixelsv1);
+     pixelsv2 = vec_mergeh(vczero, pixelsv2);
+
+     pixelssum4 = vec_add((vector unsigned short)pixelsv3,
+                          (vector unsigned short)pixelsv4);
+     pixelssum2 = vec_add((vector unsigned short)pixelsv1,
+                          (vector unsigned short)pixelsv2);
+     temp4 = vec_add(pixelssum3, pixelssum4);
+     temp4 = vec_sra(temp4, vctwo);
+     temp3 = vec_add(pixelssum1, pixelssum2);
+     temp3 = vec_sra(temp3, vctwo);
+
+     pixelssum3 = vec_add(pixelssum4, vcone);
+     pixelssum1 = vec_add(pixelssum2, vcone);
+
+     blockv = vec_packsu(temp3, temp4);
+
+     vec_st(blockv, 0, block);
+
+     block += line_size;
+     pixels += line_size;
+   }
+
+POWERPC_PERF_STOP_COUNT(altivec_put_no_rnd_pixels16_xy2_num, 1);
+}
+
+int hadamard8_diff8x8_altivec(/*MpegEncContext*/ void *s, uint8_t *dst, uint8_t *src, int stride, int h){
+POWERPC_PERF_DECLARE(altivec_hadamard8_diff8x8_num, 1);
+    int sum;
+    register const_vector unsigned char vzero =
+                            (const_vector unsigned char)vec_splat_u8(0);
+    register vector signed short temp0, temp1, temp2, temp3, temp4,
+                                 temp5, temp6, temp7;
+POWERPC_PERF_START_COUNT(altivec_hadamard8_diff8x8_num, 1);
+  {
+    register const_vector signed short vprod1 =(const_vector signed short)
+                                        AVV( 1,-1, 1,-1, 1,-1, 1,-1);
+    register const_vector signed short vprod2 =(const_vector signed short)
+                                        AVV( 1, 1,-1,-1, 1, 1,-1,-1);
+    register const_vector signed short vprod3 =(const_vector signed short)
+                                        AVV( 1, 1, 1, 1,-1,-1,-1,-1);
+    register const_vector unsigned char perm1 = (const_vector unsigned char)
+      AVV(0x02, 0x03, 0x00, 0x01, 0x06, 0x07, 0x04, 0x05,
+          0x0A, 0x0B, 0x08, 0x09, 0x0E, 0x0F, 0x0C, 0x0D);
+    register const_vector unsigned char perm2 = (const_vector unsigned char)
+      AVV(0x04, 0x05, 0x06, 0x07, 0x00, 0x01, 0x02, 0x03,
+          0x0C, 0x0D, 0x0E, 0x0F, 0x08, 0x09, 0x0A, 0x0B);
+    register const_vector unsigned char perm3 = (const_vector unsigned char)
+      AVV(0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
+          0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07);
+
+#define ONEITERBUTTERFLY(i, res)                                        \
+    {                                                                   \
+      register vector unsigned char src1, src2, srcO;                   \
+      register vector unsigned char dst1, dst2, dstO;                   \
+      register vector signed short srcV, dstV;                          \
+      register vector signed short but0, but1, but2, op1, op2, op3;     \
+      src1 = vec_ld(stride * i, src);                                   \
+      if ((((stride * i) + (unsigned long)src) & 0x0000000F) > 8)       \
+        src2 = vec_ld((stride * i) + 16, src);                          \
+      srcO = vec_perm(src1, src2, vec_lvsl(stride * i, src));           \
+      dst1 = vec_ld(stride * i, dst);                                   \
+      if ((((stride * i) + (unsigned long)dst) & 0x0000000F) > 8)       \
+        dst2 = vec_ld((stride * i) + 16, dst);                          \
+      dstO = vec_perm(dst1, dst2, vec_lvsl(stride * i, dst));           \
+      /* promote the unsigned chars to signed shorts */                 \
+      /* we're in the 8x8 function, we only care for the first 8 */     \
+      srcV =                                                            \
+        (vector signed short)vec_mergeh((vector signed char)vzero,      \
+        (vector signed char)srcO);                                      \
+      dstV =                                                            \
+        (vector signed short)vec_mergeh((vector signed char)vzero,      \
+        (vector signed char)dstO);                                      \
+      /* substractions inside the first butterfly */                    \
+      but0 = vec_sub(srcV, dstV);                                       \
+      op1 = vec_perm(but0, but0, perm1);                                \
+      but1 = vec_mladd(but0, vprod1, op1);                              \
+      op2 = vec_perm(but1, but1, perm2);                                \
+      but2 = vec_mladd(but1, vprod2, op2);                              \
+      op3 = vec_perm(but2, but2, perm3);                                \
+      res = vec_mladd(but2, vprod3, op3);                               \
+    }
+    ONEITERBUTTERFLY(0, temp0);
+    ONEITERBUTTERFLY(1, temp1);
+    ONEITERBUTTERFLY(2, temp2);
+    ONEITERBUTTERFLY(3, temp3);
+    ONEITERBUTTERFLY(4, temp4);
+    ONEITERBUTTERFLY(5, temp5);
+    ONEITERBUTTERFLY(6, temp6);
+    ONEITERBUTTERFLY(7, temp7);
+  }
+#undef ONEITERBUTTERFLY
+  {
+    register vector signed int vsum;
+    register vector signed short line0 = vec_add(temp0, temp1);
+    register vector signed short line1 = vec_sub(temp0, temp1);
+    register vector signed short line2 = vec_add(temp2, temp3);
+    register vector signed short line3 = vec_sub(temp2, temp3);
+    register vector signed short line4 = vec_add(temp4, temp5);
+    register vector signed short line5 = vec_sub(temp4, temp5);
+    register vector signed short line6 = vec_add(temp6, temp7);
+    register vector signed short line7 = vec_sub(temp6, temp7);
+
+    register vector signed short line0B = vec_add(line0, line2);
+    register vector signed short line2B = vec_sub(line0, line2);
+    register vector signed short line1B = vec_add(line1, line3);
+    register vector signed short line3B = vec_sub(line1, line3);
+    register vector signed short line4B = vec_add(line4, line6);
+    register vector signed short line6B = vec_sub(line4, line6);
+    register vector signed short line5B = vec_add(line5, line7);
+    register vector signed short line7B = vec_sub(line5, line7);
+
+    register vector signed short line0C = vec_add(line0B, line4B);
+    register vector signed short line4C = vec_sub(line0B, line4B);
+    register vector signed short line1C = vec_add(line1B, line5B);
+    register vector signed short line5C = vec_sub(line1B, line5B);
+    register vector signed short line2C = vec_add(line2B, line6B);
+    register vector signed short line6C = vec_sub(line2B, line6B);
+    register vector signed short line3C = vec_add(line3B, line7B);
+    register vector signed short line7C = vec_sub(line3B, line7B);
+
+    vsum = vec_sum4s(vec_abs(line0C), vec_splat_s32(0));
+    vsum = vec_sum4s(vec_abs(line1C), vsum);
+    vsum = vec_sum4s(vec_abs(line2C), vsum);
+    vsum = vec_sum4s(vec_abs(line3C), vsum);
+    vsum = vec_sum4s(vec_abs(line4C), vsum);
+    vsum = vec_sum4s(vec_abs(line5C), vsum);
+    vsum = vec_sum4s(vec_abs(line6C), vsum);
+    vsum = vec_sum4s(vec_abs(line7C), vsum);
+    vsum = vec_sums(vsum, (vector signed int)vzero);
+    vsum = vec_splat(vsum, 3);
+    vec_ste(vsum, 0, &sum);
+  }
+POWERPC_PERF_STOP_COUNT(altivec_hadamard8_diff8x8_num, 1);
+  return sum;
+}
+
+/*
+  16x8 works with 16 elements ; it allows to avoid replicating
+  loads, and give the compiler more rooms for scheduling.
+  It's only used from inside hadamard8_diff16_altivec.
+
+  Unfortunately, it seems gcc-3.3 is a bit dumb, and
+  the compiled code has a LOT of spill code, it seems
+  gcc (unlike xlc) cannot keep everything in registers
+  by itself. The following code include hand-made
+  registers allocation. It's not clean, but on
+  a 7450 the resulting code is much faster (best case
+  fall from 700+ cycles to 550).
+
+  xlc doesn't add spill code, but it doesn't know how to
+  schedule for the 7450, and its code isn't much faster than
+  gcc-3.3 on the 7450 (but uses 25% less instructions...)
+
+  On the 970, the hand-made RA is still a win (arount 690
+  vs. around 780), but xlc goes to around 660 on the
+  regular C code...
+*/
+
+static int hadamard8_diff16x8_altivec(/*MpegEncContext*/ void *s, uint8_t *dst, uint8_t *src, int stride, int h) {
+    int sum;
+    register vector signed short
+        temp0 REG_v(v0),
+        temp1 REG_v(v1),
+        temp2 REG_v(v2),
+        temp3 REG_v(v3),
+        temp4 REG_v(v4),
+        temp5 REG_v(v5),
+        temp6 REG_v(v6),
+        temp7 REG_v(v7);
+    register vector signed short
+        temp0S REG_v(v8),
+        temp1S REG_v(v9),
+        temp2S REG_v(v10),
+        temp3S REG_v(v11),
+        temp4S REG_v(v12),
+        temp5S REG_v(v13),
+        temp6S REG_v(v14),
+        temp7S REG_v(v15);
+    register const_vector unsigned char vzero REG_v(v31)=
+        (const_vector unsigned char)vec_splat_u8(0);
+  {
+    register const_vector signed short vprod1 REG_v(v16)=
+        (const_vector signed short)AVV( 1,-1, 1,-1, 1,-1, 1,-1);
+    register const_vector signed short vprod2 REG_v(v17)=
+        (const_vector signed short)AVV( 1, 1,-1,-1, 1, 1,-1,-1);
+    register const_vector signed short vprod3 REG_v(v18)=
+        (const_vector signed short)AVV( 1, 1, 1, 1,-1,-1,-1,-1);
+    register const_vector unsigned char perm1 REG_v(v19)=
+        (const_vector unsigned char)
+        AVV(0x02, 0x03, 0x00, 0x01, 0x06, 0x07, 0x04, 0x05,
+            0x0A, 0x0B, 0x08, 0x09, 0x0E, 0x0F, 0x0C, 0x0D);
+    register const_vector unsigned char perm2 REG_v(v20)=
+        (const_vector unsigned char)
+        AVV(0x04, 0x05, 0x06, 0x07, 0x00, 0x01, 0x02, 0x03,
+            0x0C, 0x0D, 0x0E, 0x0F, 0x08, 0x09, 0x0A, 0x0B);
+    register const_vector unsigned char perm3 REG_v(v21)=
+        (const_vector unsigned char)
+        AVV(0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
+            0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07);
+
+#define ONEITERBUTTERFLY(i, res1, res2)                                 \
+    {                                                                   \
+      register vector unsigned char src1 REG_v(v22),                    \
+                                    src2 REG_v(v23),                    \
+                                    dst1 REG_v(v24),                    \
+                                    dst2 REG_v(v25),                    \
+                                    srcO REG_v(v22),                    \
+                                    dstO REG_v(v23);                    \
+                                                                        \
+      register vector signed short  srcV REG_v(v24),                    \
+                                    dstV REG_v(v25),                    \
+                                    srcW REG_v(v26),                    \
+                                    dstW REG_v(v27),                    \
+                                    but0 REG_v(v28),                    \
+                                    but0S REG_v(v29),                   \
+                                    op1 REG_v(v30),                     \
+                                    but1 REG_v(v22),                    \
+                                    op1S REG_v(v23),                    \
+                                    but1S REG_v(v24),                   \
+                                    op2 REG_v(v25),                     \
+                                    but2 REG_v(v26),                    \
+                                    op2S REG_v(v27),                    \
+                                    but2S REG_v(v28),                   \
+                                    op3 REG_v(v29),                     \
+                                    op3S REG_v(v30);                    \
+                                                                        \
+      src1 = vec_ld(stride * i, src);                                   \
+      src2 = vec_ld((stride * i) + 16, src);                            \
+      srcO = vec_perm(src1, src2, vec_lvsl(stride * i, src));           \
+      dst1 = vec_ld(stride * i, dst);                                   \
+      dst2 = vec_ld((stride * i) + 16, dst);                            \
+      dstO = vec_perm(dst1, dst2, vec_lvsl(stride * i, dst));           \
+      /* promote the unsigned chars to signed shorts */                 \
+      srcV =                                                            \
+        (vector signed short)vec_mergeh((vector signed char)vzero,      \
+        (vector signed char)srcO);                                      \
+      dstV =                                                            \
+        (vector signed short)vec_mergeh((vector signed char)vzero,      \
+        (vector signed char)dstO);                                      \
+      srcW =                                                            \
+        (vector signed short)vec_mergel((vector signed char)vzero,      \
+        (vector signed char)srcO);                                      \
+      dstW =                                                            \
+        (vector signed short)vec_mergel((vector signed char)vzero,      \
+        (vector signed char)dstO);                                      \
+      /* substractions inside the first butterfly */                    \
+      but0 = vec_sub(srcV, dstV);                                       \
+      but0S = vec_sub(srcW, dstW);                                      \
+      op1 = vec_perm(but0, but0, perm1);                                \
+      but1 = vec_mladd(but0, vprod1, op1);                              \
+      op1S = vec_perm(but0S, but0S, perm1);                             \
+      but1S = vec_mladd(but0S, vprod1, op1S);                           \
+      op2 = vec_perm(but1, but1, perm2);                                \
+      but2 = vec_mladd(but1, vprod2, op2);                              \
+      op2S = vec_perm(but1S, but1S, perm2);                             \
+      but2S = vec_mladd(but1S, vprod2, op2S);                           \
+      op3 = vec_perm(but2, but2, perm3);                                \
+      res1 = vec_mladd(but2, vprod3, op3);                              \
+      op3S = vec_perm(but2S, but2S, perm3);                             \
+      res2 = vec_mladd(but2S, vprod3, op3S);                            \
+    }
+    ONEITERBUTTERFLY(0, temp0, temp0S);
+    ONEITERBUTTERFLY(1, temp1, temp1S);
+    ONEITERBUTTERFLY(2, temp2, temp2S);
+    ONEITERBUTTERFLY(3, temp3, temp3S);
+    ONEITERBUTTERFLY(4, temp4, temp4S);
+    ONEITERBUTTERFLY(5, temp5, temp5S);
+    ONEITERBUTTERFLY(6, temp6, temp6S);
+    ONEITERBUTTERFLY(7, temp7, temp7S);
+  }
+#undef ONEITERBUTTERFLY
+  {
+    register vector signed int vsum;
+    register vector signed short line0S, line1S, line2S, line3S, line4S,
+                                 line5S, line6S, line7S, line0BS,line2BS,
+                                 line1BS,line3BS,line4BS,line6BS,line5BS,
+                                 line7BS,line0CS,line4CS,line1CS,line5CS,
+                                 line2CS,line6CS,line3CS,line7CS;
+
+    register vector signed short line0 = vec_add(temp0, temp1);
+    register vector signed short line1 = vec_sub(temp0, temp1);
+    register vector signed short line2 = vec_add(temp2, temp3);
+    register vector signed short line3 = vec_sub(temp2, temp3);
+    register vector signed short line4 = vec_add(temp4, temp5);
+    register vector signed short line5 = vec_sub(temp4, temp5);
+    register vector signed short line6 = vec_add(temp6, temp7);
+    register vector signed short line7 = vec_sub(temp6, temp7);
+
+    register vector signed short line0B = vec_add(line0, line2);
+    register vector signed short line2B = vec_sub(line0, line2);
+    register vector signed short line1B = vec_add(line1, line3);
+    register vector signed short line3B = vec_sub(line1, line3);
+    register vector signed short line4B = vec_add(line4, line6);
+    register vector signed short line6B = vec_sub(line4, line6);
+    register vector signed short line5B = vec_add(line5, line7);
+    register vector signed short line7B = vec_sub(line5, line7);
+
+    register vector signed short line0C = vec_add(line0B, line4B);
+    register vector signed short line4C = vec_sub(line0B, line4B);
+    register vector signed short line1C = vec_add(line1B, line5B);
+    register vector signed short line5C = vec_sub(line1B, line5B);
+    register vector signed short line2C = vec_add(line2B, line6B);
+    register vector signed short line6C = vec_sub(line2B, line6B);
+    register vector signed short line3C = vec_add(line3B, line7B);
+    register vector signed short line7C = vec_sub(line3B, line7B);
+
+    vsum = vec_sum4s(vec_abs(line0C), vec_splat_s32(0));
+    vsum = vec_sum4s(vec_abs(line1C), vsum);
+    vsum = vec_sum4s(vec_abs(line2C), vsum);
+    vsum = vec_sum4s(vec_abs(line3C), vsum);
+    vsum = vec_sum4s(vec_abs(line4C), vsum);
+    vsum = vec_sum4s(vec_abs(line5C), vsum);
+    vsum = vec_sum4s(vec_abs(line6C), vsum);
+    vsum = vec_sum4s(vec_abs(line7C), vsum);
+
+    line0S = vec_add(temp0S, temp1S);
+    line1S = vec_sub(temp0S, temp1S);
+    line2S = vec_add(temp2S, temp3S);
+    line3S = vec_sub(temp2S, temp3S);
+    line4S = vec_add(temp4S, temp5S);
+    line5S = vec_sub(temp4S, temp5S);
+    line6S = vec_add(temp6S, temp7S);
+    line7S = vec_sub(temp6S, temp7S);
+
+    line0BS = vec_add(line0S, line2S);
+    line2BS = vec_sub(line0S, line2S);
+    line1BS = vec_add(line1S, line3S);
+    line3BS = vec_sub(line1S, line3S);
+    line4BS = vec_add(line4S, line6S);
+    line6BS = vec_sub(line4S, line6S);
+    line5BS = vec_add(line5S, line7S);
+    line7BS = vec_sub(line5S, line7S);
+
+    line0CS = vec_add(line0BS, line4BS);
+    line4CS = vec_sub(line0BS, line4BS);
+    line1CS = vec_add(line1BS, line5BS);
+    line5CS = vec_sub(line1BS, line5BS);
+    line2CS = vec_add(line2BS, line6BS);
+    line6CS = vec_sub(line2BS, line6BS);
+    line3CS = vec_add(line3BS, line7BS);
+    line7CS = vec_sub(line3BS, line7BS);
+
+    vsum = vec_sum4s(vec_abs(line0CS), vsum);
+    vsum = vec_sum4s(vec_abs(line1CS), vsum);
+    vsum = vec_sum4s(vec_abs(line2CS), vsum);
+    vsum = vec_sum4s(vec_abs(line3CS), vsum);
+    vsum = vec_sum4s(vec_abs(line4CS), vsum);
+    vsum = vec_sum4s(vec_abs(line5CS), vsum);
+    vsum = vec_sum4s(vec_abs(line6CS), vsum);
+    vsum = vec_sum4s(vec_abs(line7CS), vsum);
+    vsum = vec_sums(vsum, (vector signed int)vzero);
+    vsum = vec_splat(vsum, 3);
+    vec_ste(vsum, 0, &sum);
+  }
+  return sum;
+}
+
+int hadamard8_diff16_altivec(/*MpegEncContext*/ void *s, uint8_t *dst, uint8_t *src, int stride, int h){
+POWERPC_PERF_DECLARE(altivec_hadamard8_diff16_num, 1);
+    int score;
+POWERPC_PERF_START_COUNT(altivec_hadamard8_diff16_num, 1);
+    score = hadamard8_diff16x8_altivec(s, dst, src, stride, 8);
+    if (h==16) {
+        dst += 8*stride;
+        src += 8*stride;
+        score += hadamard8_diff16x8_altivec(s, dst, src, stride, 8);
+    }
+POWERPC_PERF_STOP_COUNT(altivec_hadamard8_diff16_num, 1);
+    return score;
+}
+
+int has_altivec(void)
+{
+#ifdef __AMIGAOS4__
+    ULONG result = 0;
+    extern struct ExecIFace *IExec;
+
+    IExec->GetCPUInfoTags(GCIT_VectorUnit, &result, TAG_DONE);
+    if (result == VECTORTYPE_ALTIVEC) return 1;
+    return 0;
+#else /* __AMIGAOS4__ */
+
+#ifdef CONFIG_DARWIN
+    int sels[2] = {CTL_HW, HW_VECTORUNIT};
+    int has_vu = 0;
+    size_t len = sizeof(has_vu);
+    int err;
+
+    err = sysctl(sels, 2, &has_vu, &len, NULL, 0);
+
+    if (err == 0) return (has_vu != 0);
+#else /* CONFIG_DARWIN */
+/* no Darwin, do it the brute-force way */
+/* this is borrowed from the libmpeg2 library */
+    {
+      signal (SIGILL, sigill_handler);
+      if (sigsetjmp (jmpbuf, 1)) {
+        signal (SIGILL, SIG_DFL);
+      } else {
+        canjump = 1;
+
+        asm volatile ("mtspr 256, %0\n\t"
+                      "vand %%v0, %%v0, %%v0"
+                      :
+                      : "r" (-1));
+
+        signal (SIGILL, SIG_DFL);
+        return 1;
+      }
+    }
+#endif /* CONFIG_DARWIN */
+    return 0;
+#endif /* __AMIGAOS4__ */
+}
+
+static void vorbis_inverse_coupling_altivec(float *mag, float *ang,
+                                            int blocksize)
+{
+    int i;
+    vector float m, a;
+    vector bool int t0, t1;
+    const vector unsigned int v_31 = //XXX
+        vec_add(vec_add(vec_splat_u32(15),vec_splat_u32(15)),vec_splat_u32(1));
+    for(i=0; i<blocksize; i+=4) {
+        m = vec_ld(0, mag+i);
+        a = vec_ld(0, ang+i);
+        t0 = vec_cmple(m, (vector float)vec_splat_u32(0));
+        t1 = vec_cmple(a, (vector float)vec_splat_u32(0));
+        a = vec_xor(a, (vector float) vec_sl((vector unsigned int)t0, v_31));
+        t0 = (vector bool int)vec_and(a, t1);
+        t1 = (vector bool int)vec_andc(a, t1);
+        a = vec_sub(m, (vector float)t1);
+        m = vec_add(m, (vector float)t0);
+        vec_stl(a, 0, ang+i);
+        vec_stl(m, 0, mag+i);
+    }
+}
+
+/* next one assumes that ((line_size % 8) == 0) */
+void avg_pixels8_xy2_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)
+{
+POWERPC_PERF_DECLARE(altivec_avg_pixels8_xy2_num, 1);
+    register int i;
+    register vector unsigned char pixelsv1, pixelsv2, pixelsavg;
+    register vector unsigned char blockv, temp1, temp2, blocktemp;
+    register vector unsigned short pixelssum1, pixelssum2, temp3;
+
+    register const_vector unsigned char vczero = (const_vector unsigned char)
+                                        vec_splat_u8(0);
+    register const_vector unsigned short vctwo = (const_vector unsigned short)
+                                        vec_splat_u16(2);
+
+    temp1 = vec_ld(0, pixels);
+    temp2 = vec_ld(16, pixels);
+    pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(0, pixels));
+    if ((((unsigned long)pixels) & 0x0000000F) ==  0x0000000F) {
+        pixelsv2 = temp2;
+    } else {
+        pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(1, pixels));
+    }
+    pixelsv1 = vec_mergeh(vczero, pixelsv1);
+    pixelsv2 = vec_mergeh(vczero, pixelsv2);
+    pixelssum1 = vec_add((vector unsigned short)pixelsv1,
+                         (vector unsigned short)pixelsv2);
+    pixelssum1 = vec_add(pixelssum1, vctwo);
+
+POWERPC_PERF_START_COUNT(altivec_avg_pixels8_xy2_num, 1);
+    for (i = 0; i < h ; i++) {
+        int rightside = ((unsigned long)block & 0x0000000F);
+        blockv = vec_ld(0, block);
+
+        temp1 = vec_ld(line_size, pixels);
+        temp2 = vec_ld(line_size + 16, pixels);
+        pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(line_size, pixels));
+        if (((((unsigned long)pixels) + line_size) & 0x0000000F) ==  0x0000000F)
+        {
+            pixelsv2 = temp2;
+        } else {
+            pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(line_size + 1, pixels));
+        }
+
+        pixelsv1 = vec_mergeh(vczero, pixelsv1);
+        pixelsv2 = vec_mergeh(vczero, pixelsv2);
+        pixelssum2 = vec_add((vector unsigned short)pixelsv1,
+                             (vector unsigned short)pixelsv2);
+        temp3 = vec_add(pixelssum1, pixelssum2);
+        temp3 = vec_sra(temp3, vctwo);
+        pixelssum1 = vec_add(pixelssum2, vctwo);
+        pixelsavg = vec_packsu(temp3, (vector unsigned short) vczero);
+
+        if (rightside) {
+            blocktemp = vec_perm(blockv, pixelsavg, vcprm(0, 1, s0, s1));
+        } else {
+            blocktemp = vec_perm(blockv, pixelsavg, vcprm(s0, s1, 2, 3));
+        }
+
+        blockv = vec_avg(blocktemp, blockv);
+        vec_st(blockv, 0, block);
+
+        block += line_size;
+        pixels += line_size;
+    }
+
+POWERPC_PERF_STOP_COUNT(altivec_avg_pixels8_xy2_num, 1);
+}
+
+void dsputil_init_altivec(DSPContext* c, AVCodecContext *avctx)
+{
+    c->pix_abs[0][1] = sad16_x2_altivec;
+    c->pix_abs[0][2] = sad16_y2_altivec;
+    c->pix_abs[0][3] = sad16_xy2_altivec;
+    c->pix_abs[0][0] = sad16_altivec;
+    c->pix_abs[1][0] = sad8_altivec;
+    c->sad[0]= sad16_altivec;
+    c->sad[1]= sad8_altivec;
+    c->pix_norm1 = pix_norm1_altivec;
+    c->sse[1]= sse8_altivec;
+    c->sse[0]= sse16_altivec;
+    c->pix_sum = pix_sum_altivec;
+    c->diff_pixels = diff_pixels_altivec;
+    c->get_pixels = get_pixels_altivec;
+    c->add_bytes= add_bytes_altivec;
+    c->put_pixels_tab[0][0] = put_pixels16_altivec;
+    /* the two functions do the same thing, so use the same code */
+    c->put_no_rnd_pixels_tab[0][0] = put_pixels16_altivec;
+    c->avg_pixels_tab[0][0] = avg_pixels16_altivec;
+    c->avg_pixels_tab[1][0] = avg_pixels8_altivec;
+    c->avg_pixels_tab[1][3] = avg_pixels8_xy2_altivec;
+    c->put_pixels_tab[1][3] = put_pixels8_xy2_altivec;
+    c->put_no_rnd_pixels_tab[1][3] = put_no_rnd_pixels8_xy2_altivec;
+    c->put_pixels_tab[0][3] = put_pixels16_xy2_altivec;
+    c->put_no_rnd_pixels_tab[0][3] = put_no_rnd_pixels16_xy2_altivec;
+
+    c->hadamard8_diff[0] = hadamard8_diff16_altivec;
+    c->hadamard8_diff[1] = hadamard8_diff8x8_altivec;
+#ifdef CONFIG_VORBIS_DECODER
+    c->vorbis_inverse_coupling = vorbis_inverse_coupling_altivec;
+#endif
+}