Chris@69: /* Copyright (C) 2007-2009 Xiph.Org Foundation
Chris@69:    Copyright (C) 2003-2008 Jean-Marc Valin
Chris@69:    Copyright (C) 2007-2008 CSIRO */
Chris@69: /**
Chris@69:    @file fixed_generic.h
Chris@69:    @brief Generic fixed-point operations
Chris@69: */
Chris@69: /*
Chris@69:    Redistribution and use in source and binary forms, with or without
Chris@69:    modification, are permitted provided that the following conditions
Chris@69:    are met:
Chris@69: 
Chris@69:    - Redistributions of source code must retain the above copyright
Chris@69:    notice, this list of conditions and the following disclaimer.
Chris@69: 
Chris@69:    - Redistributions in binary form must reproduce the above copyright
Chris@69:    notice, this list of conditions and the following disclaimer in the
Chris@69:    documentation and/or other materials provided with the distribution.
Chris@69: 
Chris@69:    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
Chris@69:    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
Chris@69:    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
Chris@69:    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
Chris@69:    OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
Chris@69:    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
Chris@69:    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
Chris@69:    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
Chris@69:    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
Chris@69:    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
Chris@69:    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Chris@69: */
Chris@69: 
Chris@69: #ifndef CELT_FIXED_GENERIC_MIPSR1_H
Chris@69: #define CELT_FIXED_GENERIC_MIPSR1_H
Chris@69: 
Chris@69: #undef MULT16_32_Q15_ADD
Chris@69: static inline int MULT16_32_Q15_ADD(int a, int b, int c, int d) {
Chris@69:     int m;
Chris@69:     asm volatile("MULT $ac1, %0, %1" : : "r" ((int)a), "r" ((int)b));
Chris@69:     asm volatile("madd $ac1, %0, %1" : : "r" ((int)c), "r" ((int)d));
Chris@69:     asm volatile("EXTR.W %0,$ac1, %1" : "=r" (m): "i" (15));
Chris@69:     return m;
Chris@69: }
Chris@69: 
Chris@69: #undef MULT16_32_Q15_SUB
Chris@69: static inline int MULT16_32_Q15_SUB(int a, int b, int c, int d) {
Chris@69:     int m;
Chris@69:     asm volatile("MULT $ac1, %0, %1" : : "r" ((int)a), "r" ((int)b));
Chris@69:     asm volatile("msub $ac1, %0, %1" : : "r" ((int)c), "r" ((int)d));
Chris@69:     asm volatile("EXTR.W %0,$ac1, %1" : "=r" (m): "i" (15));
Chris@69:     return m;
Chris@69: }
Chris@69: 
Chris@69: #undef MULT16_16_Q15_ADD
Chris@69: static inline int MULT16_16_Q15_ADD(int a, int b, int c, int d) {
Chris@69:     int m;
Chris@69:     asm volatile("MULT $ac1, %0, %1" : : "r" ((int)a), "r" ((int)b));
Chris@69:     asm volatile("madd $ac1, %0, %1" : : "r" ((int)c), "r" ((int)d));
Chris@69:     asm volatile("EXTR.W %0,$ac1, %1" : "=r" (m): "i" (15));
Chris@69:     return m;
Chris@69: }
Chris@69: 
Chris@69: #undef MULT16_16_Q15_SUB
Chris@69: static inline int MULT16_16_Q15_SUB(int a, int b, int c, int d) {
Chris@69:     int m;
Chris@69:     asm volatile("MULT $ac1, %0, %1" : : "r" ((int)a), "r" ((int)b));
Chris@69:     asm volatile("msub $ac1, %0, %1" : : "r" ((int)c), "r" ((int)d));
Chris@69:     asm volatile("EXTR.W %0,$ac1, %1" : "=r" (m): "i" (15));
Chris@69:     return m;
Chris@69: }
Chris@69: 
Chris@69: 
Chris@69: #undef MULT16_32_Q16
Chris@69: static inline int MULT16_32_Q16(int a, int b)
Chris@69: {
Chris@69:     int c;
Chris@69:     asm volatile("MULT $ac1,%0, %1" : : "r" (a), "r" (b));
Chris@69:     asm volatile("EXTR.W %0,$ac1, %1" : "=r" (c): "i" (16));
Chris@69:     return c;
Chris@69: }
Chris@69: 
Chris@69: #undef MULT16_32_P16
Chris@69: static inline int MULT16_32_P16(int a, int b)
Chris@69: {
Chris@69:     int c;
Chris@69:     asm volatile("MULT $ac1, %0, %1" : : "r" (a), "r" (b));
Chris@69:     asm volatile("EXTR_R.W %0,$ac1, %1" : "=r" (c): "i" (16));
Chris@69:     return c;
Chris@69: }
Chris@69: 
Chris@69: #undef MULT16_32_Q15
Chris@69: static inline int MULT16_32_Q15(int a, int b)
Chris@69: {
Chris@69:     int c;
Chris@69:     asm volatile("MULT $ac1, %0, %1" : : "r" (a), "r" (b));
Chris@69:     asm volatile("EXTR.W %0,$ac1, %1" : "=r" (c): "i" (15));
Chris@69:     return c;
Chris@69: }
Chris@69: 
Chris@69: #undef MULT32_32_Q31
Chris@69: static inline int MULT32_32_Q31(int a, int b)
Chris@69: {
Chris@69:     int r;
Chris@69:     asm volatile("MULT $ac1, %0, %1" : : "r" (a), "r" (b));
Chris@69:     asm volatile("EXTR.W %0,$ac1, %1" : "=r" (r): "i" (31));
Chris@69:     return r;
Chris@69: }
Chris@69: 
Chris@69: #undef PSHR32
Chris@69: static inline int PSHR32(int a, int shift)
Chris@69: {
Chris@69:     int r;
Chris@69:     asm volatile ("SHRAV_R.W %0, %1, %2" :"=r" (r): "r" (a), "r" (shift));
Chris@69:     return r;
Chris@69: }
Chris@69: 
Chris@69: #undef MULT16_16_P15
Chris@69: static inline int MULT16_16_P15(int a, int b)
Chris@69: {
Chris@69:     int r;
Chris@69:     asm volatile ("mul %0, %1, %2" :"=r" (r): "r" (a), "r" (b));
Chris@69:     asm volatile ("SHRA_R.W %0, %1, %2" : "+r" (r):  "0" (r), "i"(15));
Chris@69:     return r;
Chris@69: }
Chris@69: 
Chris@69: #endif /* CELT_FIXED_GENERIC_MIPSR1_H */