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80 lines
2.9 KiB
80 lines
2.9 KiB
/* Copyright (C) 2013 Xiph.Org Foundation and contributors */ |
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/* |
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Redistribution and use in source and binary forms, with or without |
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modification, are permitted provided that the following conditions |
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are met: |
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- Redistributions of source code must retain the above copyright |
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notice, this list of conditions and the following disclaimer. |
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- Redistributions in binary form must reproduce the above copyright |
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notice, this list of conditions and the following disclaimer in the |
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documentation and/or other materials provided with the distribution. |
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER |
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OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#ifndef FIXED_ARMv4_H |
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#define FIXED_ARMv4_H |
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/** 16x32 multiplication, followed by a 16-bit shift right. Results fits in 32 bits */ |
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#undef MULT16_32_Q16 |
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static OPUS_INLINE opus_val32 MULT16_32_Q16_armv4(opus_val16 a, opus_val32 b) |
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{ |
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unsigned rd_lo; |
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int rd_hi; |
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__asm__( |
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"#MULT16_32_Q16\n\t" |
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"smull %0, %1, %2, %3\n\t" |
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: "=&r"(rd_lo), "=&r"(rd_hi) |
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: "%r"(b),"r"(a<<16) |
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); |
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return rd_hi; |
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} |
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#define MULT16_32_Q16(a, b) (MULT16_32_Q16_armv4(a, b)) |
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/** 16x32 multiplication, followed by a 15-bit shift right. Results fits in 32 bits */ |
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#undef MULT16_32_Q15 |
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static OPUS_INLINE opus_val32 MULT16_32_Q15_armv4(opus_val16 a, opus_val32 b) |
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{ |
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unsigned rd_lo; |
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int rd_hi; |
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__asm__( |
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"#MULT16_32_Q15\n\t" |
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"smull %0, %1, %2, %3\n\t" |
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: "=&r"(rd_lo), "=&r"(rd_hi) |
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: "%r"(b), "r"(a<<16) |
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); |
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/*We intentionally don't OR in the high bit of rd_lo for speed.*/ |
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return rd_hi<<1; |
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} |
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#define MULT16_32_Q15(a, b) (MULT16_32_Q15_armv4(a, b)) |
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/** 16x32 multiply, followed by a 15-bit shift right and 32-bit add. |
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b must fit in 31 bits. |
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Result fits in 32 bits. */ |
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#undef MAC16_32_Q15 |
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#define MAC16_32_Q15(c, a, b) ADD32(c, MULT16_32_Q15(a, b)) |
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/** 16x32 multiply, followed by a 16-bit shift right and 32-bit add. |
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Result fits in 32 bits. */ |
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#undef MAC16_32_Q16 |
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#define MAC16_32_Q16(c, a, b) ADD32(c, MULT16_32_Q16(a, b)) |
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/** 32x32 multiplication, followed by a 31-bit shift right. Results fits in 32 bits */ |
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#undef MULT32_32_Q31 |
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#define MULT32_32_Q31(a,b) (opus_val32)((((opus_int64)(a)) * ((opus_int64)(b)))>>31) |
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#endif
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