2 * Copyright (c) 2007 Luca Barbato <lu_zero@gentoo.org>
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 ** @file int_altivec.c
26 #include "libavcodec/dsputil.h"
28 #include "gcc_fixes.h"
30 #include "dsputil_altivec.h"
32 #include "types_altivec.h"
34 static int ssd_int8_vs_int16_altivec(const int8_t *pix1
, const int16_t *pix2
,
37 vector
signed char vpix1
;
38 vector
signed short vpix2
, vdiff
, vpix1l
,vpix1h
;
39 union { vector
signed int vscore
;
42 u
.vscore
= vec_splat_s32(0);
44 //XXX lazy way, fix it later
46 #define vec_unaligned_load(b) \
47 vec_perm(vec_ld(0,b),vec_ld(15,b),vec_lvsl(0, b));
51 // score += (pix1[i]-pix2[i])*(pix1[i]-pix2[i]);
52 //load pix1 and the first batch of pix2
54 vpix1
= vec_unaligned_load(pix1
);
55 vpix2
= vec_unaligned_load(pix2
);
58 vpix1h
= vec_unpackh(vpix1
);
59 vdiff
= vec_sub(vpix1h
, vpix2
);
60 vpix1l
= vec_unpackl(vpix1
);
61 // load another batch from pix2
62 vpix2
= vec_unaligned_load(pix2
);
63 u
.vscore
= vec_msum(vdiff
, vdiff
, u
.vscore
);
64 vdiff
= vec_sub(vpix1l
, vpix2
);
65 u
.vscore
= vec_msum(vdiff
, vdiff
, u
.vscore
);
70 u
.vscore
= vec_sums(u
.vscore
, vec_splat_s32(0));
73 for (i
= 0; i
< size
; i
++) {
74 u
.score
[3] += (pix1
[i
]-pix2
[i
])*(pix1
[i
]-pix2
[i
]);
79 static void add_int16_altivec(int16_t * v1
, int16_t * v2
, int order
)
82 register vec_s16_t vec
, *pv
;
84 for(i
= 0; i
< order
; i
+= 8){
86 vec
= vec_perm(pv
[0], pv
[1], vec_lvsl(0, v2
));
87 vec_st(vec_add(vec_ld(0, v1
), vec
), 0, v1
);
93 static void sub_int16_altivec(int16_t * v1
, int16_t * v2
, int order
)
96 register vec_s16_t vec
, *pv
;
98 for(i
= 0; i
< order
; i
+= 8){
100 vec
= vec_perm(pv
[0], pv
[1], vec_lvsl(0, v2
));
101 vec_st(vec_sub(vec_ld(0, v1
), vec
), 0, v1
);
107 static int32_t scalarproduct_int16_altivec(int16_t * v1
, int16_t * v2
, int order
, const int shift
)
111 register vec_s16_t vec1
, *pv
;
112 register vec_s32_t res
= vec_splat_s32(0), t
;
113 register vec_u32_t shifts
;
114 DECLARE_ALIGNED_16(int32_t, ires
);
117 if(shift
& 0x10) shifts
= vec_add(shifts
, vec_sl(vec_splat_u32(0x08), vec_splat_u32(0x1)));
118 if(shift
& 0x08) shifts
= vec_add(shifts
, vec_splat_u32(0x08));
119 if(shift
& 0x04) shifts
= vec_add(shifts
, vec_splat_u32(0x04));
120 if(shift
& 0x02) shifts
= vec_add(shifts
, vec_splat_u32(0x02));
121 if(shift
& 0x01) shifts
= vec_add(shifts
, vec_splat_u32(0x01));
123 for(i
= 0; i
< order
; i
+= 8){
125 vec1
= vec_perm(pv
[0], pv
[1], vec_lvsl(0, v1
));
126 t
= vec_msum(vec1
, vec_ld(0, v2
), zero_s32v
);
127 t
= vec_sr(t
, shifts
);
128 res
= vec_sums(t
, res
);
132 res
= vec_splat(res
, 3);
133 vec_ste(res
, 0, &ires
);
137 void int_init_altivec(DSPContext
* c
, AVCodecContext
*avctx
)
139 c
->ssd_int8_vs_int16
= ssd_int8_vs_int16_altivec
;
140 c
->add_int16
= add_int16_altivec
;
141 c
->sub_int16
= sub_int16_altivec
;
142 c
->scalarproduct_int16
= scalarproduct_int16_altivec
;