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96 lines
2.9 KiB
96 lines
2.9 KiB
14 years ago
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/* Copyright (C) 2002 Jean-Marc Valin
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File: ltp.c
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Lont-Term Prediction functions
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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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- Neither the name of the Xiph.org Foundation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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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 FOUNDATION OR
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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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static float inner_prod(float *a, float *b, int len)
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{
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float sum;
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__asm__ __volatile__ (
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"\tpush %%eax\n"
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"\tpush %%edi\n"
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"\tpush %%ecx\n"
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"\txorps %%xmm3, %%xmm3\n"
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"\txorps %%xmm4, %%xmm4\n"
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"\tsub $20, %%ecx\n"
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".mul20_loop%=:\n"
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"\tmovups (%%eax), %%xmm0\n"
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"\tmovups (%%edi), %%xmm1\n"
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"\tmulps %%xmm0, %%xmm1\n"
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"\tmovups 16(%%eax), %%xmm5\n"
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"\tmovups 16(%%edi), %%xmm6\n"
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"\tmulps %%xmm5, %%xmm6\n"
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"\taddps %%xmm1, %%xmm3\n"
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"\tmovups 32(%%eax), %%xmm0\n"
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"\tmovups 32(%%edi), %%xmm1\n"
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"\tmulps %%xmm0, %%xmm1\n"
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"\taddps %%xmm6, %%xmm4\n"
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"\tmovups 48(%%eax), %%xmm5\n"
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"\tmovups 48(%%edi), %%xmm6\n"
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"\tmulps %%xmm5, %%xmm6\n"
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"\taddps %%xmm1, %%xmm3\n"
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"\tmovups 64(%%eax), %%xmm0\n"
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"\tmovups 64(%%edi), %%xmm1\n"
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"\tmulps %%xmm0, %%xmm1\n"
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"\taddps %%xmm6, %%xmm4\n"
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"\taddps %%xmm1, %%xmm3\n"
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"\tadd $80, %%eax\n"
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"\tadd $80, %%edi\n"
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"\tsub $20, %%ecx\n"
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"\tjae .mul20_loop%=\n"
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"\taddps %%xmm4, %%xmm3\n"
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"\tmovhlps %%xmm3, %%xmm4\n"
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"\taddps %%xmm4, %%xmm3\n"
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"\tmovaps %%xmm3, %%xmm4\n"
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"\tshufps $0x55, %%xmm4, %%xmm4\n"
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"\taddss %%xmm4, %%xmm3\n"
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"\tmovss %%xmm3, (%%edx)\n"
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"\tpop %%ecx\n"
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"\tpop %%edi\n"
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"\tpop %%eax\n"
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: : "a" (a), "D" (b), "c" (len), "d" (&sum) : "memory");
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return sum;
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}
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