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46ae64cd60
This reverts commit e00426c512.
The way we handle platform-specific intrinsics is not good, so the
current state will not compile on armv8. This commit also requires
SSE4.1 support, which is likely not a good idea for portable binaries.
We'll have to redo this with more caution after 3.2 is released, or
we might simply drop opus as we're only using it as dependency for
theora right now.
Fixes #33606.
81 lines
2.9 KiB
C++
81 lines
2.9 KiB
C++
/* 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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