213 lines
7.9 KiB
C
213 lines
7.9 KiB
C
/***************************************************************************
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Copyright (c) 2020, 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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#include "common.h"
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#include <math.h>
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#include <float.h>
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#if defined(DOUBLE)
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#define ABS fabs
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#define RVV_EFLOAT RVV_E64
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#define RVV_M RVV_M8
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#define FLOAT_V_T float64xm8_t
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#define VLEV_FLOAT vlev_float64xm8
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#define VLSEV_FLOAT vlsev_float64xm8
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#define VFREDMINVS_FLOAT vfredminvs_float64xm8
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#define MASK_T e64xm8_t
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#define VMFLTVV_FLOAT vmfltvv_e64xm8_float64xm8
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#define VFMVVF_FLOAT vfmvvf_float64xm8
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#define VFMINVV_FLOAT vfminvv_float64xm8
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#define VMFLEVF_FLOAT vmflevf_e64xm8_float64xm8
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#define VMFIRSTM vmfirstm_e64xm8
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#define UINT_V_T uint64xm8_t
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#define VIDV_MASK_UINT vidv_mask_uint64xm8
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#define VIDV_UINT vidv_uint64xm8
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#define VADDVX_MASK_UINT vaddvx_mask_uint64xm8
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#define VADDVX_UINT vaddvx_uint64xm8
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#define VMVVX_UINT vmvvx_uint64xm8
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#else
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#define ABS fabsf
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#define RVV_EFLOAT RVV_E32
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#define RVV_M RVV_M8
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#define FLOAT_V_T float32xm8_t
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#define VLEV_FLOAT vlev_float32xm8
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#define VLSEV_FLOAT vlsev_float32xm8
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#define VFREDMINVS_FLOAT vfredminvs_float32xm8
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#define MASK_T e32xm8_t
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#define VMFLTVV_FLOAT vmfltvv_e32xm8_float32xm8
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#define VFMVVF_FLOAT vfmvvf_float32xm8
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#define VFMINVV_FLOAT vfminvv_float32xm8
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#define VMFLEVF_FLOAT vmflevf_e32xm8_float32xm8
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#define VMFIRSTM vmfirstm_e32xm8
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#define UINT_V_T uint32xm8_t
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#define VIDV_MASK_UINT vidv_mask_uint32xm8
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#define VIDV_UINT vidv_uint32xm8
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#define VADDVX_MASK_UINT vaddvx_mask_uint32xm8
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#define VADDVX_UINT vaddvx_uint32xm8
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#define VMVVX_UINT vmvvx_uint32xm8
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#endif
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BLASLONG CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x)
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{
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BLASLONG i=0, j=0;
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FLOAT minf=FLT_MAX;
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unsigned int min_index = 0;
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if (n <= 0 || inc_x <= 0) return(min_index);
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FLOAT_V_T vx, v_min;
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UINT_V_T v_min_index;
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MASK_T mask;
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unsigned int gvl = 0;
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if(inc_x == 1){
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gvl = vsetvli(n, RVV_EFLOAT, RVV_M);
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v_min = VFMVVF_FLOAT(FLT_MAX, gvl);
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v_min_index = VMVVX_UINT(0, gvl);
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for(i=0,j=0; i < n/gvl; i++){
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vx = VLEV_FLOAT(&x[j], gvl);
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//index where element less than v_min
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mask = VMFLTVV_FLOAT(vx, v_min, gvl);
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v_min_index = VIDV_MASK_UINT(v_min_index, mask, gvl);
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/*
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#if defined(DOUBLE)
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asm volatile(
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"vor.vv v0, %1, %1 \n\t"
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"vsetvli x0, %2, e64,m8 \n\t"
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"vid.v %0, v0.t \n\t"
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:"+v"(v_min_index)
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:"v"(mask), "r"(gvl)
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:"v0");
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#else
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asm volatile(
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"vor.vv v0, %1, %1 \n\t"
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"vsetvli x0, %2, e32,m8 \n\t"
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"vid.v %0, v0.t \n\t"
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:"+v"(v_min_index)
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:"v"(mask), "r"(gvl)
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:"v0");
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#endif
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*/
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v_min_index = VADDVX_MASK_UINT(v_min_index, v_min_index, j, mask, gvl);
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//update v_min and start_index j
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v_min = VFMINVV_FLOAT(v_min, vx, gvl);
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j += gvl;
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}
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vx = VFMVVF_FLOAT(FLT_MAX, gvl);
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vx = VFREDMINVS_FLOAT(v_min, vx, gvl);
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minf = vx[0];
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mask = VMFLEVF_FLOAT(v_min, minf, gvl);
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min_index = VMFIRSTM(mask,gvl);
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min_index = v_min_index[min_index];
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if(j < n){
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gvl = vsetvli(n-j, RVV_EFLOAT, RVV_M);
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v_min = VLEV_FLOAT(&x[j], gvl);
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vx = VFMVVF_FLOAT(FLT_MAX, gvl);
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vx = VFREDMINVS_FLOAT(v_min, vx, gvl);
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FLOAT cur_minf = vx[0];
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if(cur_minf < minf){
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//tail index
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v_min_index = VIDV_UINT(gvl);
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v_min_index = VADDVX_UINT(v_min_index, j, gvl);
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mask = VMFLEVF_FLOAT(v_min, cur_minf, gvl);
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min_index = VMFIRSTM(mask,gvl);
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min_index = v_min_index[min_index];
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}
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}
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}else{
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gvl = vsetvli(n, RVV_EFLOAT, RVV_M);
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unsigned int stride_x = inc_x * sizeof(FLOAT);
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unsigned int idx = 0, inc_v = gvl * inc_x;
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v_min = VFMVVF_FLOAT(FLT_MAX, gvl);
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v_min_index = VMVVX_UINT(0, gvl);
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for(i=0,j=0; i < n/gvl; i++){
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vx = VLSEV_FLOAT(&x[idx], stride_x, gvl);
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//index where element less than v_min
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mask = VMFLTVV_FLOAT(vx, v_min, gvl);
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v_min_index = VIDV_MASK_UINT(v_min_index, mask, gvl);
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/*
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#if defined(DOUBLE)
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asm volatile(
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"vor.vv v0, %1, %1 \n\t"
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"vsetvli x0, %2, e64,m8 \n\t"
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"vid.v %0, v0.t \n\t"
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:"+v"(v_min_index)
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:"v"(mask), "r"(gvl)
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:"v0");
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#else
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asm volatile(
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"vor.vv v0, %1, %1 \n\t"
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"vsetvli x0, %2, e32,m8 \n\t"
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"vid.v %0, v0.t \n\t"
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:"+v"(v_min_index)
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:"v"(mask), "r"(gvl)
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:"v0");
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#endif
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*/
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v_min_index = VADDVX_MASK_UINT(v_min_index, v_min_index, j, mask, gvl);
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//update v_min and start_index j
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v_min = VFMINVV_FLOAT(v_min, vx, gvl);
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j += gvl;
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idx += inc_v;
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}
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vx = VFMVVF_FLOAT(FLT_MAX, gvl);
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vx = VFREDMINVS_FLOAT(v_min, vx, gvl);
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minf = vx[0];
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mask = VMFLEVF_FLOAT(v_min, minf, gvl);
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min_index = VMFIRSTM(mask,gvl);
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min_index = v_min_index[min_index];
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if(j < n){
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gvl = vsetvli(n-j, RVV_EFLOAT, RVV_M);
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v_min = VLSEV_FLOAT(&x[idx], stride_x, gvl);
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vx = VFMVVF_FLOAT(FLT_MAX, gvl);
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vx = VFREDMINVS_FLOAT(v_min, vx, gvl);
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FLOAT cur_minf = vx[0];
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if(cur_minf < minf){
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//tail index
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v_min_index = VIDV_UINT(gvl);
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v_min_index = VADDVX_UINT(v_min_index, j, gvl);
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mask = VMFLEVF_FLOAT(v_min, cur_minf, gvl);
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min_index = VMFIRSTM(mask,gvl);
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min_index = v_min_index[min_index];
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}
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}
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}
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return(min_index+1);
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}
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