cannam@154: /* Copyright (C) 2007-2009 Xiph.Org Foundation
cannam@154:    Copyright (C) 2003-2008 Jean-Marc Valin
cannam@154:    Copyright (C) 2007-2008 CSIRO */
cannam@154: /**
cannam@154:    @file fixed_generic.h
cannam@154:    @brief Generic fixed-point operations
cannam@154: */
cannam@154: /*
cannam@154:    Redistribution and use in source and binary forms, with or without
cannam@154:    modification, are permitted provided that the following conditions
cannam@154:    are met:
cannam@154: 
cannam@154:    - Redistributions of source code must retain the above copyright
cannam@154:    notice, this list of conditions and the following disclaimer.
cannam@154: 
cannam@154:    - Redistributions in binary form must reproduce the above copyright
cannam@154:    notice, this list of conditions and the following disclaimer in the
cannam@154:    documentation and/or other materials provided with the distribution.
cannam@154: 
cannam@154:    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
cannam@154:    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
cannam@154:    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
cannam@154:    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
cannam@154:    OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
cannam@154:    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
cannam@154:    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
cannam@154:    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
cannam@154:    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
cannam@154:    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
cannam@154:    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
cannam@154: */
cannam@154: 
cannam@154: #ifndef CELT_FIXED_GENERIC_MIPSR1_H
cannam@154: #define CELT_FIXED_GENERIC_MIPSR1_H
cannam@154: 
cannam@154: #undef MULT16_32_Q15_ADD
cannam@154: static inline int MULT16_32_Q15_ADD(int a, int b, int c, int d) {
cannam@154:     int m;
cannam@154:     asm volatile("MULT $ac1, %0, %1" : : "r" ((int)a), "r" ((int)b));
cannam@154:     asm volatile("madd $ac1, %0, %1" : : "r" ((int)c), "r" ((int)d));
cannam@154:     asm volatile("EXTR.W %0,$ac1, %1" : "=r" (m): "i" (15));
cannam@154:     return m;
cannam@154: }
cannam@154: 
cannam@154: #undef MULT16_32_Q15_SUB
cannam@154: static inline int MULT16_32_Q15_SUB(int a, int b, int c, int d) {
cannam@154:     int m;
cannam@154:     asm volatile("MULT $ac1, %0, %1" : : "r" ((int)a), "r" ((int)b));
cannam@154:     asm volatile("msub $ac1, %0, %1" : : "r" ((int)c), "r" ((int)d));
cannam@154:     asm volatile("EXTR.W %0,$ac1, %1" : "=r" (m): "i" (15));
cannam@154:     return m;
cannam@154: }
cannam@154: 
cannam@154: #undef MULT16_16_Q15_ADD
cannam@154: static inline int MULT16_16_Q15_ADD(int a, int b, int c, int d) {
cannam@154:     int m;
cannam@154:     asm volatile("MULT $ac1, %0, %1" : : "r" ((int)a), "r" ((int)b));
cannam@154:     asm volatile("madd $ac1, %0, %1" : : "r" ((int)c), "r" ((int)d));
cannam@154:     asm volatile("EXTR.W %0,$ac1, %1" : "=r" (m): "i" (15));
cannam@154:     return m;
cannam@154: }
cannam@154: 
cannam@154: #undef MULT16_16_Q15_SUB
cannam@154: static inline int MULT16_16_Q15_SUB(int a, int b, int c, int d) {
cannam@154:     int m;
cannam@154:     asm volatile("MULT $ac1, %0, %1" : : "r" ((int)a), "r" ((int)b));
cannam@154:     asm volatile("msub $ac1, %0, %1" : : "r" ((int)c), "r" ((int)d));
cannam@154:     asm volatile("EXTR.W %0,$ac1, %1" : "=r" (m): "i" (15));
cannam@154:     return m;
cannam@154: }
cannam@154: 
cannam@154: 
cannam@154: #undef MULT16_32_Q16
cannam@154: static inline int MULT16_32_Q16(int a, int b)
cannam@154: {
cannam@154:     int c;
cannam@154:     asm volatile("MULT $ac1,%0, %1" : : "r" (a), "r" (b));
cannam@154:     asm volatile("EXTR.W %0,$ac1, %1" : "=r" (c): "i" (16));
cannam@154:     return c;
cannam@154: }
cannam@154: 
cannam@154: #undef MULT16_32_P16
cannam@154: static inline int MULT16_32_P16(int a, int b)
cannam@154: {
cannam@154:     int c;
cannam@154:     asm volatile("MULT $ac1, %0, %1" : : "r" (a), "r" (b));
cannam@154:     asm volatile("EXTR_R.W %0,$ac1, %1" : "=r" (c): "i" (16));
cannam@154:     return c;
cannam@154: }
cannam@154: 
cannam@154: #undef MULT16_32_Q15
cannam@154: static inline int MULT16_32_Q15(int a, int b)
cannam@154: {
cannam@154:     int c;
cannam@154:     asm volatile("MULT $ac1, %0, %1" : : "r" (a), "r" (b));
cannam@154:     asm volatile("EXTR.W %0,$ac1, %1" : "=r" (c): "i" (15));
cannam@154:     return c;
cannam@154: }
cannam@154: 
cannam@154: #undef MULT32_32_Q31
cannam@154: static inline int MULT32_32_Q31(int a, int b)
cannam@154: {
cannam@154:     int r;
cannam@154:     asm volatile("MULT $ac1, %0, %1" : : "r" (a), "r" (b));
cannam@154:     asm volatile("EXTR.W %0,$ac1, %1" : "=r" (r): "i" (31));
cannam@154:     return r;
cannam@154: }
cannam@154: 
cannam@154: #undef PSHR32
cannam@154: static inline int PSHR32(int a, int shift)
cannam@154: {
cannam@154:     int r;
cannam@154:     asm volatile ("SHRAV_R.W %0, %1, %2" :"=r" (r): "r" (a), "r" (shift));
cannam@154:     return r;
cannam@154: }
cannam@154: 
cannam@154: #undef MULT16_16_P15
cannam@154: static inline int MULT16_16_P15(int a, int b)
cannam@154: {
cannam@154:     int r;
cannam@154:     asm volatile ("mul %0, %1, %2" :"=r" (r): "r" (a), "r" (b));
cannam@154:     asm volatile ("SHRA_R.W %0, %1, %2" : "+r" (r):  "0" (r), "i"(15));
cannam@154:     return r;
cannam@154: }
cannam@154: 
cannam@154: #endif /* CELT_FIXED_GENERIC_MIPSR1_H */