--- /dev/null
+/***************************************************************************
+Copyright (c) 2017, The OpenBLAS Project
+All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+1. Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in
+the documentation and/or other materials provided with the
+distribution.
+3. Neither the name of the OpenBLAS project nor the names of
+its contributors may be used to endorse or promote products
+derived from this software without specific prior written permission.
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBLAS PROJECT OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*****************************************************************************/
+
+
+#include "common.h"
+
+#include <arm_neon.h>
+
+#define N "x0" /* vector length */
+#define X "x1" /* "X" vector address */
+#define INC_X "x2" /* "X" stride */
+#define Y "x3" /* "Y" vector address */
+#define INC_Y "x4" /* "Y" stride */
+#define J "x5" /* loop variable */
+
+#define REG0 "xzr"
+#define DOTF "d0"
+#define TMPX "d16"
+#define LD1VX "{v16.d}[0]"
+#define TMPY "d24"
+#define LD1VY "{v24.d}[0]"
+#define SZ "8"
+
+extern int blas_level1_thread_with_return_value(int mode, BLASLONG m, BLASLONG n,
+ BLASLONG k, void *alpha, void *a, BLASLONG lda, void *b, BLASLONG ldb,
+ void *c, BLASLONG ldc, int (*function)(), int nthreads);
+
+
+static FLOAT ddot_compute(BLASLONG n, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y)
+{
+ FLOAT dot = 0.0 ;
+
+ if ( n < 0 ) return(dot);
+
+ __asm__ __volatile__ (
+ " mov "N", %[N_] \n"
+ " mov "X", %[X_] \n"
+ " mov "INC_X", %[INCX_] \n"
+ " mov "Y", %[Y_] \n"
+ " mov "INC_Y", %[INCY_] \n"
+ " fmov "DOTF", "REG0" \n"
+ " fmov d1, "REG0" \n"
+ " fmov d2, "REG0" \n"
+ " fmov d3, "REG0" \n"
+ " fmov d4, "REG0" \n"
+ " fmov d5, "REG0" \n"
+ " fmov d6, "REG0" \n"
+ " fmov d7, "REG0" \n"
+
+ " cmp "N", xzr \n"
+ " ble 9f //dot_kernel_L999 \n"
+
+ " cmp "INC_X", #1 \n"
+ " bne 5f //dot_kernel_S_BEGIN \n"
+ " cmp "INC_Y", #1 \n"
+ " bne 5f //dot_kernel_S_BEGIN \n"
+
+ "1: //dot_kernel_F_BEGIN \n"
+ " asr "J", "N", #5 \n"
+ " cmp "J", xzr \n"
+ " beq 3f //dot_kernel_F1 \n"
+
+ " .align 5 \n"
+ "2: //dot_kernel_F32 \n"
+ " ldp q16, q17, ["X"] \n"
+ " ldp q24, q25, ["Y"] \n"
+ " ldp q18, q19, ["X", #32] \n"
+ " ldp q26, q27, ["Y", #32] \n"
+ " fmla v0.2d, v16.2d, v24.2d \n"
+ " fmla v1.2d, v17.2d, v25.2d \n"
+ " ldp q20, q21, ["X", #64] \n"
+ " ldp q28, q29, ["Y", #64] \n"
+ " fmla v2.2d, v18.2d, v26.2d \n"
+ " fmla v3.2d, v19.2d, v27.2d \n"
+ " ldp q22, q23, ["X", #96] \n"
+ " ldp q30, q31, ["Y", #96] \n"
+ " add "Y", "Y", #128 \n"
+ " add "X", "X", #128 \n"
+ " fmla v4.2d, v20.2d, v28.2d \n"
+ " fmla v5.2d, v21.2d, v29.2d \n"
+ " PRFM PLDL1KEEP, ["X", #896] \n"
+ " PRFM PLDL1KEEP, ["Y", #896] \n"
+ " PRFM PLDL1KEEP, ["X", #896+64] \n"
+ " PRFM PLDL1KEEP, ["Y", #896+64] \n"
+ " fmla v6.2d, v22.2d, v30.2d \n"
+ " fmla v7.2d, v23.2d, v31.2d \n"
+
+ " ldp q16, q17, ["X"] \n"
+ " ldp q24, q25, ["Y"] \n"
+ " ldp q18, q19, ["X", #32] \n"
+ " ldp q26, q27, ["Y", #32] \n"
+ " fmla v0.2d, v16.2d, v24.2d \n"
+ " fmla v1.2d, v17.2d, v25.2d \n"
+ " ldp q20, q21, ["X", #64] \n"
+ " ldp q28, q29, ["Y", #64] \n"
+ " fmla v2.2d, v18.2d, v26.2d \n"
+ " fmla v3.2d, v19.2d, v27.2d \n"
+ " ldp q22, q23, ["X", #96] \n"
+ " ldp q30, q31, ["Y", #96] \n"
+ " add "Y", "Y", #128 \n"
+ " add "X", "X", #128 \n"
+ " fmla v4.2d, v20.2d, v28.2d \n"
+ " fmla v5.2d, v21.2d, v29.2d \n"
+ " PRFM PLDL1KEEP, ["X", #896] \n"
+ " PRFM PLDL1KEEP, ["Y", #896] \n"
+ " PRFM PLDL1KEEP, ["X", #896+64] \n"
+ " PRFM PLDL1KEEP, ["Y", #896+64] \n"
+ " fmla v6.2d, v22.2d, v30.2d \n"
+ " fmla v7.2d, v23.2d, v31.2d \n"
+
+ " subs "J", "J", #1 \n"
+ " bne 2b //dot_kernel_F32 \n"
+
+ " fadd v0.2d, v0.2d, v1.2d \n"
+ " fadd v2.2d, v2.2d, v3.2d \n"
+ " fadd v4.2d, v4.2d, v5.2d \n"
+ " fadd v6.2d, v6.2d, v7.2d \n"
+ " fadd v0.2d, v0.2d, v2.2d \n"
+ " fadd v4.2d, v4.2d, v6.2d \n"
+ " fadd v0.2d, v0.2d, v4.2d \n"
+ " faddp "DOTF", v0.2d \n"
+
+ "3: //dot_kernel_F1 \n"
+ " ands "J", "N", #31 \n"
+ " ble 9f //dot_kernel_L999 \n"
+
+ "4: //dot_kernel_F10 \n"
+ " ldr "TMPX", ["X"] \n"
+ " ldr "TMPY", ["Y"] \n"
+ " add "X", "X", #"SZ" \n"
+ " add "Y", "Y", #"SZ" \n"
+ " fmadd "DOTF", "TMPX", "TMPY", "DOTF" \n"
+
+ " subs "J", "J", #1 \n"
+ " bne 4b //dot_kernel_F10 \n"
+
+ " b 9f //dot_kernel_L999 \n"
+
+ "5: //dot_kernel_S_BEGIN \n"
+ " lsl "INC_X", "INC_X", #3 \n"
+ " lsl "INC_Y", "INC_Y", #3 \n"
+ " asr "J", "N", #2 \n"
+ " cmp "J", xzr \n"
+ " ble 7f //dot_kernel_S1 \n"
+
+ "6: //dot_kernel_S4: \n"
+ " ld1 "LD1VX", ["X"], "INC_X" \n"
+ " ld1 "LD1VY", ["Y"], "INC_Y" \n"
+ " fmadd "DOTF", "TMPX", "TMPY", "DOTF" \n"
+ " ld1 "LD1VX", ["X"], "INC_X" \n"
+ " ld1 "LD1VY", ["Y"], "INC_Y" \n"
+ " fmadd "DOTF", "TMPX", "TMPY", "DOTF" \n"
+ " ld1 "LD1VX", ["X"], "INC_X" \n"
+ " ld1 "LD1VY", ["Y"], "INC_Y" \n"
+ " fmadd "DOTF", "TMPX", "TMPY", "DOTF" \n"
+ " ld1 "LD1VX", ["X"], "INC_X" \n"
+ " ld1 "LD1VY", ["Y"], "INC_Y" \n"
+ " fmadd "DOTF", "TMPX", "TMPY", "DOTF" \n"
+ " subs "J", "J", #1 \n"
+ " bne 6b //dot_kernel_S4 \n"
+
+ "7: //dot_kernel_S1: \n"
+ " ands "J", "N", #3 \n"
+ " ble 9f //dot_kernel_L999 \n"
+
+ "8: //dot_kernel_S10 \n"
+ " ld1 "LD1VX", ["X"], "INC_X" \n"
+ " ld1 "LD1VY", ["Y"], "INC_Y" \n"
+ " fmadd "DOTF", "TMPX", "TMPY", "DOTF" \n"
+ " subs "J", "J", #1 \n"
+ " bne 8b //dot_kernel_S10 \n"
+
+ "9: //dot_kernel_L999 \n"
+ " fmov %[DOT_], "DOTF" \n"
+ : [DOT_] "=r" (dot) //%0
+ : [N_] "r" (n), //%1
+ [X_] "r" (x), //%2
+ [INCX_] "r" (inc_x), //%3
+ [Y_] "r" (y), //%4
+ [INCY_] "r" (inc_y) //%5
+ : "cc",
+ "memory",
+ "x0", "x1", "x2", "x3", "x4", "x5",
+ "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7"
+ );
+
+ return(dot);
+}
+
+static int ddot_thread_function(BLASLONG n, BLASLONG dummy0,
+ BLASLONG dummy1, FLOAT dummy2, FLOAT *x, BLASLONG inc_x, FLOAT *y,
+ BLASLONG inc_y, FLOAT *result, BLASLONG dummy3)
+{
+ *result = ddot_compute(n, x, inc_x, y, inc_y);
+
+ return 0;
+}
+
+FLOAT CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y)
+{
+ int nthreads;
+ FLOAT dot = 0.0;
+ FLOAT dummy_alpha;
+
+ nthreads = num_cpu_avail(1);
+
+ if (inc_x == 0 || inc_y == 0)
+ nthreads = 1;
+
+ if (n <= 10000)
+ nthreads = 1;
+
+ if (nthreads == 1) {
+ dot = ddot_compute(n, x, inc_x, y, inc_y);
+ } else {
+ int mode, i;
+ char result[MAX_CPU_NUMBER * sizeof(double) * 2];
+ FLOAT *ptr;
+
+ mode = BLAS_DOUBLE | BLAS_REAL;
+
+ blas_level1_thread_with_return_value(mode, n, 0, 0, &dummy_alpha,
+ x, inc_x, y, inc_y, result, 0,
+ ( void *)ddot_thread_function, nthreads);
+
+ ptr = (FLOAT *)result;
+ for (i = 0; i < nthreads; i++) {
+ dot = dot + (*ptr);
+ ptr = (FLOAT *)(((char *)ptr) + sizeof(double) * 2);
+ }
+ }
+
+ return dot;
+}
projects / platform / upstream / openblas.git / commitdiff