cannam@154: /***********************************************************************
cannam@154: Copyright (C) 2013 Xiph.Org Foundation and contributors.
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: - Redistributions of source code must retain the above copyright notice,
cannam@154: this list of conditions and the following disclaimer.
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: - Neither the name of Internet Society, IETF or IETF Trust, nor the
cannam@154: names of specific contributors, may be used to endorse or promote
cannam@154: products derived from this software without specific prior written
cannam@154: permission.
cannam@154: THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
cannam@154: AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
cannam@154: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
cannam@154: ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
cannam@154: LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
cannam@154: CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
cannam@154: SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
cannam@154: INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
cannam@154: CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
cannam@154: ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
cannam@154: POSSIBILITY OF SUCH DAMAGE.
cannam@154: ***********************************************************************/
cannam@154: 
cannam@154: #ifndef SILK_MACROS_ARMv4_H
cannam@154: #define SILK_MACROS_ARMv4_H
cannam@154: 
cannam@154: /* This macro only avoids the undefined behaviour from a left shift of
cannam@154:    a negative value. It should only be used in macros that can't include
cannam@154:    SigProc_FIX.h. In other cases, use silk_LSHIFT32(). */
cannam@154: #define SAFE_SHL(a,b) ((opus_int32)((opus_uint32)(a) << (b)))
cannam@154: 
cannam@154: /* (a32 * (opus_int32)((opus_int16)(b32))) >> 16 output have to be 32bit int */
cannam@154: #undef silk_SMULWB
cannam@154: static OPUS_INLINE opus_int32 silk_SMULWB_armv4(opus_int32 a, opus_int16 b)
cannam@154: {
cannam@154:   unsigned rd_lo;
cannam@154:   int rd_hi;
cannam@154:   __asm__(
cannam@154:       "#silk_SMULWB\n\t"
cannam@154:       "smull %0, %1, %2, %3\n\t"
cannam@154:       : "=&r"(rd_lo), "=&r"(rd_hi)
cannam@154:       : "%r"(a), "r"(SAFE_SHL(b,16))
cannam@154:   );
cannam@154:   return rd_hi;
cannam@154: }
cannam@154: #define silk_SMULWB(a, b) (silk_SMULWB_armv4(a, b))
cannam@154: 
cannam@154: /* a32 + (b32 * (opus_int32)((opus_int16)(c32))) >> 16 output have to be 32bit int */
cannam@154: #undef silk_SMLAWB
cannam@154: #define silk_SMLAWB(a, b, c) ((a) + silk_SMULWB(b, c))
cannam@154: 
cannam@154: /* (a32 * (b32 >> 16)) >> 16 */
cannam@154: #undef silk_SMULWT
cannam@154: static OPUS_INLINE opus_int32 silk_SMULWT_armv4(opus_int32 a, opus_int32 b)
cannam@154: {
cannam@154:   unsigned rd_lo;
cannam@154:   int rd_hi;
cannam@154:   __asm__(
cannam@154:       "#silk_SMULWT\n\t"
cannam@154:       "smull %0, %1, %2, %3\n\t"
cannam@154:       : "=&r"(rd_lo), "=&r"(rd_hi)
cannam@154:       : "%r"(a), "r"(b&~0xFFFF)
cannam@154:   );
cannam@154:   return rd_hi;
cannam@154: }
cannam@154: #define silk_SMULWT(a, b) (silk_SMULWT_armv4(a, b))
cannam@154: 
cannam@154: /* a32 + (b32 * (c32 >> 16)) >> 16 */
cannam@154: #undef silk_SMLAWT
cannam@154: #define silk_SMLAWT(a, b, c) ((a) + silk_SMULWT(b, c))
cannam@154: 
cannam@154: /* (a32 * b32) >> 16 */
cannam@154: #undef silk_SMULWW
cannam@154: static OPUS_INLINE opus_int32 silk_SMULWW_armv4(opus_int32 a, opus_int32 b)
cannam@154: {
cannam@154:   unsigned rd_lo;
cannam@154:   int rd_hi;
cannam@154:   __asm__(
cannam@154:     "#silk_SMULWW\n\t"
cannam@154:     "smull %0, %1, %2, %3\n\t"
cannam@154:     : "=&r"(rd_lo), "=&r"(rd_hi)
cannam@154:     : "%r"(a), "r"(b)
cannam@154:   );
cannam@154:   return SAFE_SHL(rd_hi,16)+(rd_lo>>16);
cannam@154: }
cannam@154: #define silk_SMULWW(a, b) (silk_SMULWW_armv4(a, b))
cannam@154: 
cannam@154: #undef silk_SMLAWW
cannam@154: static OPUS_INLINE opus_int32 silk_SMLAWW_armv4(opus_int32 a, opus_int32 b,
cannam@154:  opus_int32 c)
cannam@154: {
cannam@154:   unsigned rd_lo;
cannam@154:   int rd_hi;
cannam@154:   __asm__(
cannam@154:     "#silk_SMLAWW\n\t"
cannam@154:     "smull %0, %1, %2, %3\n\t"
cannam@154:     : "=&r"(rd_lo), "=&r"(rd_hi)
cannam@154:     : "%r"(b), "r"(c)
cannam@154:   );
cannam@154:   return a+SAFE_SHL(rd_hi,16)+(rd_lo>>16);
cannam@154: }
cannam@154: #define silk_SMLAWW(a, b, c) (silk_SMLAWW_armv4(a, b, c))
cannam@154: 
cannam@154: #undef SAFE_SHL
cannam@154: 
cannam@154: #endif /* SILK_MACROS_ARMv4_H */