2 * Copyright (c) 2002 Brian Foley
3 * Copyright (c) 2002 Dieter Shirley
4 * Copyright (c) 2003-2004 Romain Dolbeau <romain@dolbeau.org>
6 * This library 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 of the License, or (at your option) any later version.
11 * This library 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 this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #ifndef _DSPUTIL_ALTIVEC_
22 #define _DSPUTIL_ALTIVEC_
24 #include "dsputil_ppc.h"
28 extern int has_altivec(void);
30 // used to build registers permutation vectors (vcprm)
31 // the 's' are for words in the _s_econd vector
32 #define WORD_0 0x00,0x01,0x02,0x03
33 #define WORD_1 0x04,0x05,0x06,0x07
34 #define WORD_2 0x08,0x09,0x0a,0x0b
35 #define WORD_3 0x0c,0x0d,0x0e,0x0f
36 #define WORD_s0 0x10,0x11,0x12,0x13
37 #define WORD_s1 0x14,0x15,0x16,0x17
38 #define WORD_s2 0x18,0x19,0x1a,0x1b
39 #define WORD_s3 0x1c,0x1d,0x1e,0x1f
42 #define vcprm(a,b,c,d) (const vector unsigned char)(WORD_ ## a, WORD_ ## b, WORD_ ## c, WORD_ ## d)
44 #define vcprm(a,b,c,d) (const vector unsigned char){WORD_ ## a, WORD_ ## b, WORD_ ## c, WORD_ ## d}
47 // vcprmle is used to keep the same index as in the SSE version.
48 // it's the same as vcprm, with the index inversed
49 // ('le' is Little Endian)
50 #define vcprmle(a,b,c,d) vcprm(d,c,b,a)
52 // used to build inverse/identity vectors (vcii)
53 // n is _n_egative, p is _p_ositive
59 #define vcii(a,b,c,d) (const vector float)(FLOAT_ ## a, FLOAT_ ## b, FLOAT_ ## c, FLOAT_ ## d)
61 #define vcii(a,b,c,d) (const vector float){FLOAT_ ## a, FLOAT_ ## b, FLOAT_ ## c, FLOAT_ ## d}
64 #else /* HAVE_ALTIVEC */
65 #ifdef ALTIVEC_USE_REFERENCE_C_CODE
66 #error "I can't use ALTIVEC_USE_REFERENCE_C_CODE if I don't use HAVE_ALTIVEC"
67 #endif /* ALTIVEC_USE_REFERENCE_C_CODE */
68 #endif /* HAVE_ALTIVEC */
70 #endif /* _DSPUTIL_ALTIVEC_ */