Remove PPC perf counter support
[libav.git] / libavcodec / ppc / gmc_altivec.c
1 /*
2 * GMC (Global Motion Compensation)
3 * AltiVec-enabled
4 * Copyright (c) 2003 Romain Dolbeau <romain@dolbeau.org>
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 #include "libavcodec/dsputil.h"
24 #include "util_altivec.h"
25 #include "types_altivec.h"
26 #include "dsputil_altivec.h"
27
28 /*
29 altivec-enhanced gmc1. ATM this code assume stride is a multiple of 8,
30 to preserve proper dst alignment.
31 */
32 void gmc1_altivec(uint8_t *dst /* align 8 */, uint8_t *src /* align1 */, int stride, int h, int x16, int y16, int rounder)
33 {
34 const DECLARE_ALIGNED(16, unsigned short, rounder_a) = rounder;
35 const DECLARE_ALIGNED(16, unsigned short, ABCD)[8] =
36 {
37 (16-x16)*(16-y16), /* A */
38 ( x16)*(16-y16), /* B */
39 (16-x16)*( y16), /* C */
40 ( x16)*( y16), /* D */
41 0, 0, 0, 0 /* padding */
42 };
43 register const vector unsigned char vczero = (const vector unsigned char)vec_splat_u8(0);
44 register const vector unsigned short vcsr8 = (const vector unsigned short)vec_splat_u16(8);
45 register vector unsigned char dstv, dstv2, src_0, src_1, srcvA, srcvB, srcvC, srcvD;
46 register vector unsigned short Av, Bv, Cv, Dv, rounderV, tempA, tempB, tempC, tempD;
47 int i;
48 unsigned long dst_odd = (unsigned long)dst & 0x0000000F;
49 unsigned long src_really_odd = (unsigned long)src & 0x0000000F;
50
51 tempA = vec_ld(0, (unsigned short*)ABCD);
52 Av = vec_splat(tempA, 0);
53 Bv = vec_splat(tempA, 1);
54 Cv = vec_splat(tempA, 2);
55 Dv = vec_splat(tempA, 3);
56
57 rounderV = vec_splat((vec_u16)vec_lde(0, &rounder_a), 0);
58
59 // we'll be able to pick-up our 9 char elements
60 // at src from those 32 bytes
61 // we load the first batch here, as inside the loop
62 // we can re-use 'src+stride' from one iteration
63 // as the 'src' of the next.
64 src_0 = vec_ld(0, src);
65 src_1 = vec_ld(16, src);
66 srcvA = vec_perm(src_0, src_1, vec_lvsl(0, src));
67
68 if (src_really_odd != 0x0000000F) {
69 // if src & 0xF == 0xF, then (src+1) is properly aligned
70 // on the second vector.
71 srcvB = vec_perm(src_0, src_1, vec_lvsl(1, src));
72 } else {
73 srcvB = src_1;
74 }
75 srcvA = vec_mergeh(vczero, srcvA);
76 srcvB = vec_mergeh(vczero, srcvB);
77
78 for(i=0; i<h; i++) {
79 dst_odd = (unsigned long)dst & 0x0000000F;
80 src_really_odd = (((unsigned long)src) + stride) & 0x0000000F;
81
82 dstv = vec_ld(0, dst);
83
84 // we we'll be able to pick-up our 9 char elements
85 // at src + stride from those 32 bytes
86 // then reuse the resulting 2 vectors srvcC and srcvD
87 // as the next srcvA and srcvB
88 src_0 = vec_ld(stride + 0, src);
89 src_1 = vec_ld(stride + 16, src);
90 srcvC = vec_perm(src_0, src_1, vec_lvsl(stride + 0, src));
91
92 if (src_really_odd != 0x0000000F) {
93 // if src & 0xF == 0xF, then (src+1) is properly aligned
94 // on the second vector.
95 srcvD = vec_perm(src_0, src_1, vec_lvsl(stride + 1, src));
96 } else {
97 srcvD = src_1;
98 }
99
100 srcvC = vec_mergeh(vczero, srcvC);
101 srcvD = vec_mergeh(vczero, srcvD);
102
103
104 // OK, now we (finally) do the math :-)
105 // those four instructions replaces 32 int muls & 32 int adds.
106 // isn't AltiVec nice ?
107 tempA = vec_mladd((vector unsigned short)srcvA, Av, rounderV);
108 tempB = vec_mladd((vector unsigned short)srcvB, Bv, tempA);
109 tempC = vec_mladd((vector unsigned short)srcvC, Cv, tempB);
110 tempD = vec_mladd((vector unsigned short)srcvD, Dv, tempC);
111
112 srcvA = srcvC;
113 srcvB = srcvD;
114
115 tempD = vec_sr(tempD, vcsr8);
116
117 dstv2 = vec_pack(tempD, (vector unsigned short)vczero);
118
119 if (dst_odd) {
120 dstv2 = vec_perm(dstv, dstv2, vcprm(0,1,s0,s1));
121 } else {
122 dstv2 = vec_perm(dstv, dstv2, vcprm(s0,s1,2,3));
123 }
124
125 vec_st(dstv2, 0, dst);
126
127 dst += stride;
128 src += stride;
129 }
130 }