ppc: add const where needed in scalarproduct_int16_altivec()

[ffmpeg] / libavcodec / ppc / int_altivec.c

diff --git a/libavcodec/ppc/int_altivec.c b/libavcodec/ppc/int_altivec.c
index d76a2200480992fd268b0cd65e6546974ea28c2e..3c8b852298b2a3839dc25f7d30b9f1bd8b6ec83a 100644 (file)
--- a/libavcodec/ppc/int_altivec.c
+++ b/libavcodec/ppc/int_altivec.c
@@ -1,25 +1,25 @@
 /*
  * Copyright (c) 2007 Luca Barbato <lu_zero@gentoo.org>
  *
- * This file is part of FFmpeg.
+ * This file is part of Libav.
  *
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 /**
- ** @file libavcodec/ppc/int_altivec.c
+ ** @file
  ** integer misc ops.
  **/
 
@@ -79,55 +79,20 @@ static int ssd_int8_vs_int16_altivec(const int8_t *pix1, const int16_t *pix2,
     return u.score[3];
 }
 
-static void add_int16_altivec(int16_t * v1, int16_t * v2, int order)
-{
-    int i;
-    register vec_s16 vec, *pv;
-
-    for(i = 0; i < order; i += 8){
-        pv = (vec_s16*)v2;
-        vec = vec_perm(pv[0], pv[1], vec_lvsl(0, v2));
-        vec_st(vec_add(vec_ld(0, v1), vec), 0, v1);
-        v1 += 8;
-        v2 += 8;
-    }
-}
-
-static void sub_int16_altivec(int16_t * v1, int16_t * v2, int order)
-{
-    int i;
-    register vec_s16 vec, *pv;
-
-    for(i = 0; i < order; i += 8){
-        pv = (vec_s16*)v2;
-        vec = vec_perm(pv[0], pv[1], vec_lvsl(0, v2));
-        vec_st(vec_sub(vec_ld(0, v1), vec), 0, v1);
-        v1 += 8;
-        v2 += 8;
-    }
-}
-
-static int32_t scalarproduct_int16_altivec(int16_t * v1, int16_t * v2, int order, const int shift)
+static int32_t scalarproduct_int16_altivec(const int16_t *v1, const int16_t *v2,
+                                           int order)
 {
     int i;
     LOAD_ZERO;
-    register vec_s16 vec1, *pv;
+    const vec_s16 *pv;
+    register vec_s16 vec1;
     register vec_s32 res = vec_splat_s32(0), t;
-    register vec_u32 shifts;
     int32_t ires;
 
-    shifts = zero_u32v;
-    if(shift & 0x10) shifts = vec_add(shifts, vec_sl(vec_splat_u32(0x08), vec_splat_u32(0x1)));
-    if(shift & 0x08) shifts = vec_add(shifts, vec_splat_u32(0x08));
-    if(shift & 0x04) shifts = vec_add(shifts, vec_splat_u32(0x04));
-    if(shift & 0x02) shifts = vec_add(shifts, vec_splat_u32(0x02));
-    if(shift & 0x01) shifts = vec_add(shifts, vec_splat_u32(0x01));
-
     for(i = 0; i < order; i += 8){
-        pv = (vec_s16*)v1;
+        pv = (const vec_s16*)v1;
         vec1 = vec_perm(pv[0], pv[1], vec_lvsl(0, v1));
         t = vec_msum(vec1, vec_ld(0, v2), zero_s32v);
-        t = vec_sr(t, shifts);
         res = vec_sums(t, res);
         v1 += 8;
         v2 += 8;
@@ -137,10 +102,44 @@ static int32_t scalarproduct_int16_altivec(int16_t * v1, int16_t * v2, int order
     return ires;
 }
 
-void int_init_altivec(DSPContext* c, AVCodecContext *avctx)
+static int32_t scalarproduct_and_madd_int16_altivec(int16_t *v1, const int16_t *v2, const int16_t *v3, int order, int mul)
+{
+    LOAD_ZERO;
+    vec_s16 *pv1 = (vec_s16*)v1;
+    register vec_s16 muls = {mul,mul,mul,mul,mul,mul,mul,mul};
+    register vec_s16 t0, t1, i0, i1, i4;
+    register vec_s16 i2 = vec_ld(0, v2), i3 = vec_ld(0, v3);
+    register vec_s32 res = zero_s32v;
+    register vec_u8 align = vec_lvsl(0, v2);
+    int32_t ires;
+    order >>= 4;
+    do {
+        i1 = vec_ld(16, v2);
+        t0 = vec_perm(i2, i1, align);
+        i2 = vec_ld(32, v2);
+        t1 = vec_perm(i1, i2, align);
+        i0 = pv1[0];
+        i1 = pv1[1];
+        res = vec_msum(t0, i0, res);
+        res = vec_msum(t1, i1, res);
+        i4 = vec_ld(16, v3);
+        t0 = vec_perm(i3, i4, align);
+        i3 = vec_ld(32, v3);
+        t1 = vec_perm(i4, i3, align);
+        pv1[0] = vec_mladd(t0, muls, i0);
+        pv1[1] = vec_mladd(t1, muls, i1);
+        pv1 += 2;
+        v2  += 8;
+        v3  += 8;
+    } while(--order);
+    res = vec_splat(vec_sums(res, zero_s32v), 3);
+    vec_ste(res, 0, &ires);
+    return ires;
+}
+
+void ff_int_init_altivec(DSPContext* c, AVCodecContext *avctx)
 {
     c->ssd_int8_vs_int16 = ssd_int8_vs_int16_altivec;
-    c->add_int16 = add_int16_altivec;
-    c->sub_int16 = sub_int16_altivec;
     c->scalarproduct_int16 = scalarproduct_int16_altivec;
+    c->scalarproduct_and_madd_int16 = scalarproduct_and_madd_int16_altivec;
 }