394 lines
9.9 KiB
C
394 lines
9.9 KiB
C
/***************************************************************************
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Copyright (c) 2013-2019, The OpenBLAS Project
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All rights reserved.
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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 are
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met:
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1. 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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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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3. Neither the name of the OpenBLAS project nor the names of
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its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBLAS PROJECT OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*****************************************************************************/
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/*
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* Avoid contraction of floating point operations, specifically fused
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* multiply-add, because they can cause unexpected results in complex
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* multiplication.
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*/
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#if defined(__GNUC__) && !defined(__clang__)
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#pragma GCC optimize ("fp-contract=off")
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#endif
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#if defined(__clang__)
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#pragma clang fp contract(off)
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#endif
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#include "common.h"
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#include "vector-common.h"
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static void cscal_kernel_16(BLASLONG n, FLOAT da_r, FLOAT da_i, FLOAT *x) {
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vector_float da_r_vec = vec_splats(da_r);
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vector_float da_i_vec = { -da_i, da_i, -da_i, da_i };
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vector_float *x_vec_ptr = (vector_float *)x;
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#pragma GCC unroll 16
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for (size_t i = 0; i < n/2; i++) {
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vector_float x_vec = vec_load_hinted(x + i * VLEN_FLOATS);
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vector_float x_swapped = {x_vec[1], x_vec[0], x_vec[3], x_vec[2]};
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x_vec_ptr[i] = x_vec * da_r_vec + x_swapped * da_i_vec;
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}
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}
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static void cscal_kernel_16_zero_r(BLASLONG n, FLOAT *alpha, FLOAT *x) {
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__asm__("vlef %%v0,4(%[alpha]),0\n\t"
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"vlef %%v0,4(%[alpha]),2\n\t"
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"vflcsb %%v0,%%v0\n\t"
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"vlef %%v0,4(%[alpha]),1\n\t"
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"vlef %%v0,4(%[alpha]),3\n\t"
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"srlg %[n],%[n],4\n\t"
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"xgr %%r1,%%r1\n\t"
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"0:\n\t"
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"pfd 2, 1024(%%r1,%[x])\n\t"
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"vl %%v16,0(%%r1,%[x])\n\t"
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"vl %%v17,16(%%r1,%[x])\n\t"
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"vl %%v18,32(%%r1,%[x])\n\t"
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"vl %%v19,48(%%r1,%[x])\n\t"
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"vl %%v20,64(%%r1,%[x])\n\t"
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"vl %%v21,80(%%r1,%[x])\n\t"
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"vl %%v22,96(%%r1,%[x])\n\t"
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"vl %%v23,112(%%r1,%[x])\n\t"
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"verllg %%v16,%%v16,32\n\t"
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"verllg %%v17,%%v17,32\n\t"
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"verllg %%v18,%%v18,32\n\t"
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"verllg %%v19,%%v19,32\n\t"
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"verllg %%v20,%%v20,32\n\t"
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"verllg %%v21,%%v21,32\n\t"
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"verllg %%v22,%%v22,32\n\t"
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"verllg %%v23,%%v23,32\n\t"
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"vfmsb %%v16,%%v16,%%v0\n\t"
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"vfmsb %%v17,%%v17,%%v0\n\t"
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"vfmsb %%v18,%%v18,%%v0\n\t"
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"vfmsb %%v19,%%v19,%%v0\n\t"
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"vfmsb %%v20,%%v20,%%v0\n\t"
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"vfmsb %%v21,%%v21,%%v0\n\t"
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"vfmsb %%v22,%%v22,%%v0\n\t"
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"vfmsb %%v23,%%v23,%%v0\n\t"
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"vst %%v16,0(%%r1,%[x])\n\t"
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"vst %%v17,16(%%r1,%[x])\n\t"
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"vst %%v18,32(%%r1,%[x])\n\t"
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"vst %%v19,48(%%r1,%[x])\n\t"
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"vst %%v20,64(%%r1,%[x])\n\t"
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"vst %%v21,80(%%r1,%[x])\n\t"
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"vst %%v22,96(%%r1,%[x])\n\t"
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"vst %%v23,112(%%r1,%[x])\n\t"
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"agfi %%r1,128\n\t"
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"brctg %[n],0b"
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: "+m"(*(FLOAT (*)[n * 2]) x),[n] "+&r"(n)
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: [x] "a"(x), "m"(*(const FLOAT (*)[2]) alpha),
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[alpha] "a"(alpha)
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: "cc", "r1", "v0", "v16", "v17", "v18", "v19", "v20", "v21", "v22",
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"v23");
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}
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static void cscal_kernel_16_zero_i(BLASLONG n, FLOAT *alpha, FLOAT *x) {
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__asm__("vlrepf %%v0,0(%[alpha])\n\t"
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"srlg %[n],%[n],4\n\t"
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"xgr %%r1,%%r1\n\t"
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"0:\n\t"
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"pfd 2, 1024(%%r1,%[x])\n\t"
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"vl %%v16,0(%%r1,%[x])\n\t"
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"vl %%v17,16(%%r1,%[x])\n\t"
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"vl %%v18,32(%%r1,%[x])\n\t"
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"vl %%v19,48(%%r1,%[x])\n\t"
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"vl %%v20,64(%%r1,%[x])\n\t"
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"vl %%v21,80(%%r1,%[x])\n\t"
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"vl %%v22,96(%%r1,%[x])\n\t"
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"vl %%v23,112(%%r1,%[x])\n\t"
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"vfmsb %%v16,%%v16,%%v0\n\t"
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"vfmsb %%v17,%%v17,%%v0\n\t"
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"vfmsb %%v18,%%v18,%%v0\n\t"
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"vfmsb %%v19,%%v19,%%v0\n\t"
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"vfmsb %%v20,%%v20,%%v0\n\t"
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"vfmsb %%v21,%%v21,%%v0\n\t"
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"vfmsb %%v22,%%v22,%%v0\n\t"
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"vfmsb %%v23,%%v23,%%v0\n\t"
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"vst %%v16,0(%%r1,%[x])\n\t"
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"vst %%v17,16(%%r1,%[x])\n\t"
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"vst %%v18,32(%%r1,%[x])\n\t"
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"vst %%v19,48(%%r1,%[x])\n\t"
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"vst %%v20,64(%%r1,%[x])\n\t"
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"vst %%v21,80(%%r1,%[x])\n\t"
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"vst %%v22,96(%%r1,%[x])\n\t"
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"vst %%v23,112(%%r1,%[x])\n\t"
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"agfi %%r1,128\n\t"
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"brctg %[n],0b"
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: "+m"(*(FLOAT (*)[n * 2]) x),[n] "+&r"(n)
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: [x] "a"(x), "m"(*(const FLOAT (*)[2]) alpha),
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[alpha] "a"(alpha)
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: "cc", "r1", "v0", "v16", "v17", "v18", "v19", "v20", "v21", "v22",
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"v23");
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}
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static void cscal_kernel_16_zero(BLASLONG n, FLOAT *x) {
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__asm__("vzero %%v0\n\t"
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"srlg %[n],%[n],4\n\t"
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"xgr %%r1,%%r1\n\t"
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"0:\n\t"
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"pfd 2, 1024(%%r1,%[x])\n\t"
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"vst %%v0,0(%%r1,%[x])\n\t"
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"vst %%v0,16(%%r1,%[x])\n\t"
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"vst %%v0,32(%%r1,%[x])\n\t"
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"vst %%v0,48(%%r1,%[x])\n\t"
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"vst %%v0,64(%%r1,%[x])\n\t"
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"vst %%v0,80(%%r1,%[x])\n\t"
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"vst %%v0,96(%%r1,%[x])\n\t"
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"vst %%v0,112(%%r1,%[x])\n\t"
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"agfi %%r1,128\n\t"
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"brctg %[n],0b"
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: "=m"(*(FLOAT (*)[n * 2]) x),[n] "+&r"(n)
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: [x] "a"(x)
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: "cc", "r1", "v0");
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}
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static void cscal_kernel_inc_8(BLASLONG n, FLOAT da_r, FLOAT da_i, FLOAT *x,
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BLASLONG inc_x) {
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BLASLONG i;
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BLASLONG inc_x2 = 2 * inc_x;
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BLASLONG inc_x3 = inc_x2 + inc_x;
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FLOAT t0, t1, t2, t3;
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for (i = 0; i < n; i += 4) {
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t0 = da_r * x[0] - da_i * x[1];
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t1 = da_r * x[inc_x] - da_i * x[inc_x + 1];
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t2 = da_r * x[inc_x2] - da_i * x[inc_x2 + 1];
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t3 = da_r * x[inc_x3] - da_i * x[inc_x3 + 1];
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x[1] = da_i * x[0] + da_r * x[1];
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x[inc_x + 1] = da_i * x[inc_x] + da_r * x[inc_x + 1];
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x[inc_x2 + 1] = da_i * x[inc_x2] + da_r * x[inc_x2 + 1];
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x[inc_x3 + 1] = da_i * x[inc_x3] + da_r * x[inc_x3 + 1];
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x[0] = t0;
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x[inc_x] = t1;
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x[inc_x2] = t2;
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x[inc_x3] = t3;
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x += 4 * inc_x;
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}
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}
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int CNAME(BLASLONG n, BLASLONG dummy0, BLASLONG dummy1, FLOAT da_r, FLOAT da_i,
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FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y, FLOAT *dummy,
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BLASLONG dummy2) {
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BLASLONG i = 0, j = 0;
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FLOAT temp0;
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FLOAT temp1;
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FLOAT alpha[2] __attribute__ ((aligned(16)));
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if (inc_x != 1) {
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inc_x <<= 1;
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if (da_r == 0.0) {
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BLASLONG n1 = n & -2;
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if (da_i == 0.0) {
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while (j < n1) {
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x[i] = 0.0;
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x[i + 1] = 0.0;
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x[i + inc_x] = 0.0;
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x[i + 1 + inc_x] = 0.0;
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i += 2 * inc_x;
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j += 2;
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}
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while (j < n) {
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x[i] = 0.0;
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x[i + 1] = 0.0;
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i += inc_x;
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j++;
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}
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} else {
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while (j < n1) {
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temp0 = -da_i * x[i + 1];
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x[i + 1] = da_i * x[i];
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x[i] = temp0;
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temp1 = -da_i * x[i + 1 + inc_x];
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x[i + 1 + inc_x] = da_i * x[i + inc_x];
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x[i + inc_x] = temp1;
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i += 2 * inc_x;
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j += 2;
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}
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while (j < n) {
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temp0 = -da_i * x[i + 1];
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x[i + 1] = da_i * x[i];
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x[i] = temp0;
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i += inc_x;
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j++;
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}
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}
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} else {
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if (da_i == 0.0) {
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BLASLONG n1 = n & -2;
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while (j < n1) {
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temp0 = da_r * x[i];
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x[i + 1] = da_r * x[i + 1];
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x[i] = temp0;
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temp1 = da_r * x[i + inc_x];
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x[i + 1 + inc_x] = da_r * x[i + 1 + inc_x];
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x[i + inc_x] = temp1;
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i += 2 * inc_x;
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j += 2;
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}
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while (j < n) {
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temp0 = da_r * x[i];
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x[i + 1] = da_r * x[i + 1];
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x[i] = temp0;
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i += inc_x;
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j++;
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}
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} else {
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BLASLONG n1 = n & -8;
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if (n1 > 0) {
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cscal_kernel_inc_8(n1, da_r, da_i, x, inc_x);
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j = n1;
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i = n1 * inc_x;
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}
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while (j < n) {
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temp0 = da_r * x[i] - da_i * x[i + 1];
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x[i + 1] = da_r * x[i + 1] + da_i * x[i];
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x[i] = temp0;
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i += inc_x;
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j++;
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}
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}
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}
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return (0);
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}
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BLASLONG n1 = n & -16;
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if (n1 > 0) {
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alpha[0] = da_r;
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alpha[1] = da_i;
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if (da_r == 0.0)
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if (da_i == 0)
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cscal_kernel_16_zero(n1, x);
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else
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cscal_kernel_16_zero_r(n1, alpha, x);
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else if (da_i == 0)
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cscal_kernel_16_zero_i(n1, alpha, x);
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else
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cscal_kernel_16(n1, da_r, da_i, x);
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i = n1 << 1;
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j = n1;
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}
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if (da_r == 0.0) {
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if (da_i == 0.0) {
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while (j < n) {
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x[i] = 0.0;
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x[i + 1] = 0.0;
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i += 2;
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j++;
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}
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} else {
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while (j < n) {
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temp0 = -da_i * x[i + 1];
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x[i + 1] = da_i * x[i];
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x[i] = temp0;
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i += 2;
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j++;
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}
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}
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} else {
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if (da_i == 0.0) {
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while (j < n) {
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temp0 = da_r * x[i];
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x[i + 1] = da_r * x[i + 1];
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x[i] = temp0;
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i += 2;
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j++;
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}
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} else {
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while (j < n) {
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temp0 = da_r * x[i] - da_i * x[i + 1];
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x[i + 1] = da_r * x[i + 1] + da_i * x[i];
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x[i] = temp0;
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i += 2;
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j++;
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}
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}
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}
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return (0);
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}
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