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comparison: media/libopus/celt/arm/fixed_armv4.h
media/libopus/celt/arm/fixed_armv4.h
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| 1 /* Copyright (C) 2013 Xiph.Org Foundation and contributors */ | |
| 2 /* | |
| 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 | |
| 7 - Redistributions of source code must retain the above copyright | |
| 8 notice, this list of conditions and the following disclaimer. | |
| 9 | |
| 10 - Redistributions in binary form must reproduce the above copyright | |
| 11 notice, this list of conditions and the following disclaimer in the | |
| 12 documentation and/or other materials provided with the distribution. | |
| 13 | |
| 14 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 15 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 16 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 17 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER | |
| 18 OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 19 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 20 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 21 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
| 22 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
| 23 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
| 24 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 25 */ | |
| 26 | |
| 27 #ifndef FIXED_ARMv4_H | |
| 28 #define FIXED_ARMv4_H | |
| 29 | |
| 30 /** 16x32 multiplication, followed by a 16-bit shift right. Results fits in 32 bits */ | |
| 31 #undef MULT16_32_Q16 | |
| 32 static OPUS_INLINE opus_val32 MULT16_32_Q16_armv4(opus_val16 a, opus_val32 b) | |
| 33 { | |
| 34 unsigned rd_lo; | |
| 35 int rd_hi; | |
| 36 __asm__( | |
| 37 "#MULT16_32_Q16\n\t" | |
| 38 "smull %0, %1, %2, %3\n\t" | |
| 39 : "=&r"(rd_lo), "=&r"(rd_hi) | |
| 40 : "%r"(b),"r"(a<<16) | |
| 41 ); | |
| 42 return rd_hi; | |
| 43 } | |
| 44 #define MULT16_32_Q16(a, b) (MULT16_32_Q16_armv4(a, b)) | |
| 45 | |
| 46 | |
| 47 /** 16x32 multiplication, followed by a 15-bit shift right. Results fits in 32 bits */ | |
| 48 #undef MULT16_32_Q15 | |
| 49 static OPUS_INLINE opus_val32 MULT16_32_Q15_armv4(opus_val16 a, opus_val32 b) | |
| 50 { | |
| 51 unsigned rd_lo; | |
| 52 int rd_hi; | |
| 53 __asm__( | |
| 54 "#MULT16_32_Q15\n\t" | |
| 55 "smull %0, %1, %2, %3\n\t" | |
| 56 : "=&r"(rd_lo), "=&r"(rd_hi) | |
| 57 : "%r"(b), "r"(a<<16) | |
| 58 ); | |
| 59 /*We intentionally don't OR in the high bit of rd_lo for speed.*/ | |
| 60 return rd_hi<<1; | |
| 61 } | |
| 62 #define MULT16_32_Q15(a, b) (MULT16_32_Q15_armv4(a, b)) | |
| 63 | |
| 64 | |
| 65 /** 16x32 multiply, followed by a 15-bit shift right and 32-bit add. | |
| 66 b must fit in 31 bits. | |
| 67 Result fits in 32 bits. */ | |
| 68 #undef MAC16_32_Q15 | |
| 69 #define MAC16_32_Q15(c, a, b) ADD32(c, MULT16_32_Q15(a, b)) | |
| 70 | |
| 71 | |
| 72 /** 32x32 multiplication, followed by a 31-bit shift right. Results fits in 32 bits */ | |
| 73 #undef MULT32_32_Q31 | |
| 74 #define MULT32_32_Q31(a,b) (opus_val32)((((opus_int64)(a)) * ((opus_int64)(b)))>>31) | |
| 75 | |
| 76 #endif |
