1 /*********************************************************************** 2 Copyright (C) 2013 Xiph.Org Foundation and contributors. 3 Redistribution and use in source and binary forms, with or without 4 modification, are permitted provided that the following conditions 5 are met: 6 - Redistributions of source code must retain the above copyright notice, 7 this list of conditions and the following disclaimer. 8 - Redistributions in binary form must reproduce the above copyright 9 notice, this list of conditions and the following disclaimer in the 10 documentation and/or other materials provided with the distribution. 11 - Neither the name of Internet Society, IETF or IETF Trust, nor the 12 names of specific contributors, may be used to endorse or promote 13 products derived from this software without specific prior written 14 permission. 15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 16 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 19 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 POSSIBILITY OF SUCH DAMAGE. 26 ***********************************************************************/ 27 28 #ifndef SILK_MACROS_ARMv4_H 29 #define SILK_MACROS_ARMv4_H 30 31 /* This macro only avoids the undefined behaviour from a left shift of 32 a negative value. It should only be used in macros that can't include 33 SigProc_FIX.h. In other cases, use silk_LSHIFT32(). */ 34 #define SAFE_SHL(a,b) ((opus_int32)((opus_uint32)(a) << (b))) 35 36 /* (a32 * (opus_int32)((opus_int16)(b32))) >> 16 output have to be 32bit int */ 37 #undef silk_SMULWB 38 static OPUS_INLINE opus_int32 silk_SMULWB_armv4(opus_int32 a, opus_int16 b) 39 { 40 unsigned rd_lo; 41 int rd_hi; 42 __asm__( 43 "#silk_SMULWB\n\t" 44 "smull %0, %1, %2, %3\n\t" 45 : "=&r"(rd_lo), "=&r"(rd_hi) 46 : "%r"(a), "r"(SAFE_SHL(b,16)) 47 ); 48 return rd_hi; 49 } 50 #define silk_SMULWB(a, b) (silk_SMULWB_armv4(a, b)) 51 52 /* a32 + (b32 * (opus_int32)((opus_int16)(c32))) >> 16 output have to be 32bit int */ 53 #undef silk_SMLAWB 54 #define silk_SMLAWB(a, b, c) ((a) + silk_SMULWB(b, c)) 55 56 /* (a32 * (b32 >> 16)) >> 16 */ 57 #undef silk_SMULWT 58 static OPUS_INLINE opus_int32 silk_SMULWT_armv4(opus_int32 a, opus_int32 b) 59 { 60 unsigned rd_lo; 61 int rd_hi; 62 __asm__( 63 "#silk_SMULWT\n\t" 64 "smull %0, %1, %2, %3\n\t" 65 : "=&r"(rd_lo), "=&r"(rd_hi) 66 : "%r"(a), "r"(b&~0xFFFF) 67 ); 68 return rd_hi; 69 } 70 #define silk_SMULWT(a, b) (silk_SMULWT_armv4(a, b)) 71 72 /* a32 + (b32 * (c32 >> 16)) >> 16 */ 73 #undef silk_SMLAWT 74 #define silk_SMLAWT(a, b, c) ((a) + silk_SMULWT(b, c)) 75 76 /* (a32 * b32) >> 16 */ 77 #undef silk_SMULWW 78 static OPUS_INLINE opus_int32 silk_SMULWW_armv4(opus_int32 a, opus_int32 b) 79 { 80 unsigned rd_lo; 81 int rd_hi; 82 __asm__( 83 "#silk_SMULWW\n\t" 84 "smull %0, %1, %2, %3\n\t" 85 : "=&r"(rd_lo), "=&r"(rd_hi) 86 : "%r"(a), "r"(b) 87 ); 88 return SAFE_SHL(rd_hi,16)+(rd_lo>>16); 89 } 90 #define silk_SMULWW(a, b) (silk_SMULWW_armv4(a, b)) 91 92 #undef silk_SMLAWW 93 static OPUS_INLINE opus_int32 silk_SMLAWW_armv4(opus_int32 a, opus_int32 b, 94 opus_int32 c) 95 { 96 unsigned rd_lo; 97 int rd_hi; 98 __asm__( 99 "#silk_SMLAWW\n\t" 100 "smull %0, %1, %2, %3\n\t" 101 : "=&r"(rd_lo), "=&r"(rd_hi) 102 : "%r"(b), "r"(c) 103 ); 104 return a+SAFE_SHL(rd_hi,16)+(rd_lo>>16); 105 } 106 #define silk_SMLAWW(a, b, c) (silk_SMLAWW_armv4(a, b, c)) 107 108 #undef SAFE_SHL 109 110 #endif /* SILK_MACROS_ARMv4_H */ 111
