57 lines
2 KiB
C
57 lines
2 KiB
C
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/* Copyright (C) 2013 Nils Wallménius */
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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_CF_H
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#define FIXED_CF_H
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#undef MULT16_32_Q15
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static inline int32_t MULT16_32_Q15_cf(int32_t a, int32_t b)
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{
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int32_t r;
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asm volatile ("mac.l %[a], %[b], %%acc0;"
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"movclr.l %%acc0, %[r];"
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: [r] "=r" (r)
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: [a] "r" (a<<16), [b] "r" (b)
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: "cc");
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return r;
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}
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#define MULT16_32_Q15(a, b) (MULT16_32_Q15_cf(a, b))
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#undef MULT32_32_Q31
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static inline int32_t MULT32_32_Q31_cf(int32_t a, int32_t b)
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{
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int32_t r;
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asm volatile ("mac.l %[a], %[b], %%acc0;"
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"movclr.l %%acc0, %[r];"
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: [r] "=r" (r)
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: [a] "r" (a), [b] "r" (b)
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: "cc");
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return r;
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}
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#define MULT32_32_Q31(a, b) (MULT32_32_Q31_cf(a, b))
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#endif
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