Optimized amax kernels for CORTEXA57

Co-Authored-By: Ralph Campbell <ralph.campbell@broadcom.com>

kernel/arm64/KERNEL.CORTEXA57

@@ -1,2 +1,6 @@
 include $(KERNELDIR)/KERNEL.ARMV8
 
+SAMAXKERNEL  = amax.S
+DAMAXKERNEL  = amax.S
+CAMAXKERNEL  = zamax.S
+ZAMAXKERNEL  = zamax.S

kernel/arm64/amax.S

@@ -0,0 +1,249 @@
+/*******************************************************************************
+Copyright (c) 2015, 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.
+*******************************************************************************/
+
+#define ASSEMBLER
+#include "common.h"
+
+#define	N	x0	/* vector length */
+#define	X	x1	/* X vector address */
+#define	INC_X	x2	/* X stride */
+#define I	x5	/* loop variable */
+
+/*******************************************************************************
+* Macro definitions
+*******************************************************************************/
+
+#if defined(USE_MIN)
+#define COND	le
+#else
+#define COND	ge
+#endif
+
+#if !defined(DOUBLE)
+#define REG0	wzr
+#define MAXF	s0
+#define TMPF	s1
+#define TMPVF	{v1.s}[0]
+#define SZ	4
+#else
+#define REG0	xzr
+#define MAXF	d0
+#define TMPF	d1
+#define TMPVF	{v1.d}[0]
+#define SZ	8
+#endif
+
+/******************************************************************************/
+
+.macro INIT_F1
+	ldr	MAXF, [X], #SZ
+#if defined(USE_ABS)
+	fabs	MAXF, MAXF
+#endif
+.endm
+
+.macro KERNEL_F1
+	ldr	TMPF, [X], #SZ
+#if defined(USE_ABS)
+	fabs	TMPF, TMPF
+#endif
+	fcmp	MAXF, TMPF
+	fcsel	MAXF, MAXF, TMPF, COND
+.endm
+
+.macro INIT_F4
+#if !defined(DOUBLE)
+	ld1	{v0.4s}, [X], #16
+#if defined(USE_ABS)
+	fabs	v0.4s, v0.4s
+#endif
+#if defined(USE_MIN)
+	fminv	MAXF, v0.4s
+#else
+	fmaxv	MAXF, v0.4s
+#endif
+#else // DOUBLE
+	ld2	{v0.2d,v1.2d}, [X], #32
+#if defined(USE_ABS)
+	fabs	v0.2d, v0.2d
+	fabs	v1.2d, v1.2d
+#endif
+#if defined(USE_MIN)
+	fmin	v0.2d, v0.2d, v1.2d
+	fminp	MAXF, v0.2d
+#else
+	fmax	v0.2d, v0.2d, v1.2d
+	fmaxp	MAXF, v0.2d
+#endif
+#endif
+.endm
+
+.macro KERNEL_F4
+#if !defined(DOUBLE)
+	ld1	{v1.4s}, [X], #16
+#if defined(USE_ABS)
+	fabs	v1.4s, v1.4s
+#endif
+#if defined(USE_MIN)
+	fminv	TMPF, v1.4s
+#else
+	fmaxv	TMPF, v1.4s
+#endif
+#else // DOUBLE
+	ld2	{v1.2d,v2.2d}, [X], #32
+#if defined(USE_ABS)
+	fabs	v1.2d, v1.2d
+	fabs	v2.2d, v2.2d
+#endif
+#if defined(USE_MIN)
+	fmin	v1.2d, v1.2d, v2.2d
+	fminp	TMPF, v1.2d
+#else
+	fmax	v1.2d, v1.2d, v2.2d
+	fmaxp	TMPF, v1.2d
+#endif
+#endif
+	fcmp	MAXF, TMPF
+	fcsel	MAXF, MAXF, TMPF, COND
+.endm
+
+.macro INIT_S
+#if !defined(DOUBLE)
+	lsl	INC_X, INC_X, #2
+	ld1	{v0.s}[0], [X], INC_X
+#else
+	lsl	INC_X, INC_X, #3
+	ld1	{v0.d}[0], [X], INC_X
+#endif
+#if defined(USE_ABS)
+	fabs	MAXF, MAXF
+#endif
+.endm
+
+.macro KERNEL_S1
+	ld1	TMPVF, [X], INC_X
+#if defined(USE_ABS)
+	fabs	TMPF, TMPF
+#endif
+	fcmp	MAXF, TMPF
+	fcsel	MAXF, MAXF, TMPF, COND
+.endm
+
+/*******************************************************************************
+* End of macro definitions
+*******************************************************************************/
+
+	PROLOGUE
+
+	cmp	N, xzr
+	ble	amax_kernel_zero
+	cmp	INC_X, xzr
+	ble	amax_kernel_zero
+
+	cmp	INC_X, #1
+	bne	amax_kernel_S_BEGIN
+
+amax_kernel_F_BEGIN:
+
+	asr	I, N, #2
+	cmp	I, xzr
+	beq	amax_kernel_F1_INIT
+
+	INIT_F4
+	subs	I, I, #1
+	beq	amax_kernel_F1
+
+amax_kernel_F4:
+
+	KERNEL_F4
+
+	subs	I, I, #1
+	bne	amax_kernel_F4
+
+amax_kernel_F1:
+
+	ands	I, N, #3
+	ble	amax_kernel_L999
+
+amax_kernel_F10:
+
+	KERNEL_F1
+
+	subs    I, I, #1
+        bne     amax_kernel_F10
+
+	ret
+
+amax_kernel_F1_INIT:
+
+	INIT_F1
+	subs	N, N, #1
+	b	amax_kernel_F1
+
+amax_kernel_S_BEGIN:
+
+	INIT_S
+
+	subs	N, N, #1
+	ble	amax_kernel_L999
+
+	asr	I, N, #2
+	cmp	I, xzr
+	ble	amax_kernel_S1
+
+amax_kernel_S4:
+
+	KERNEL_S1
+	KERNEL_S1
+	KERNEL_S1
+	KERNEL_S1
+
+	subs	I, I, #1
+	bne	amax_kernel_S4
+
+amax_kernel_S1:
+
+	ands	I, N, #3
+	ble	amax_kernel_L999
+
+amax_kernel_S10:
+
+	KERNEL_S1
+
+	subs    I, I, #1
+        bne     amax_kernel_S10
+
+amax_kernel_L999:
+
+	ret
+
+amax_kernel_zero:
+
+	fmov	MAXF, REG0
+	ret
+
+	EPILOGUE

kernel/arm64/zamax.S

@@ -0,0 +1,273 @@
+/*******************************************************************************
+Copyright (c) 2015, 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.
+*******************************************************************************/
+
+#define ASSEMBLER
+#include "common.h"
+
+#define	N	x0	/* vector length */
+#define	X	x1	/* X vector address */
+#define	INC_X	x2	/* X stride */
+#define I	x5	/* loop variable */
+
+/*******************************************************************************
+* Macro definitions
+*******************************************************************************/
+
+#if defined(USE_MIN)
+#define COND	le
+#else
+#define COND	ge
+#endif
+
+#if !defined(DOUBLE)
+#define REG0	wzr
+#define MAXF	s0
+#define TMPF	s1
+#define TMPVF	{v1.s}[0]
+#define SZ	4
+#else
+#define REG0	xzr
+#define MAXF	d0
+#define TMPF	d1
+#define TMPVF	{v1.d}[0]
+#define SZ	8
+#endif
+
+/******************************************************************************/
+
+.macro INIT_F1
+#if !defined(DOUBLE)
+	ld1	{v0.2s}, [X], #8
+	fabs	v0.2s, v0.2s
+	ext	v1.8b, v0.8b, v0.8b, #4
+	fadd	MAXF, s0, s1
+#else
+	ld1	{v0.2d}, [X], #16
+	fabs	v0.2d, v0.2d
+	faddp	MAXF, v0.2d
+#endif
+.endm
+
+.macro KERNEL_F1
+#if !defined(DOUBLE)
+	ld1	{v1.2s}, [X], #8
+	fabs	v1.2s, v1.2s
+	ext	v2.8b, v1.8b, v1.8b, #4
+	fadd	TMPF, s1, s2
+#else
+	ld1	{v1.2d}, [X], #16
+	fabs	v1.2d, v1.2d
+	faddp	TMPF, v1.2d
+#endif
+	fcmp	MAXF, TMPF
+	fcsel	MAXF, MAXF, TMPF, COND
+.endm
+
+.macro INIT_F4
+#if !defined(DOUBLE)
+	ld2	{v0.4s,v1.4s}, [X], #32
+	fabs	v0.4s, v0.4s			// [X6, X4, X2, X0]
+	fabs	v1.4s, v1.4s			// [X7, X5, X3, X1]
+	fadd	v0.4s, v0.4s, v1.4s		// [X7+X6, X5+X4, X3+X2, X1+X0]
+#if defined(USE_MIN)
+	fminv	MAXF, v0.4s
+#else
+	fmaxv	MAXF, v0.4s
+#endif
+#else // DOUBLE
+	ld4	{v0.2d,v1.2d,v2.2d,v3.2d}, [X], #64
+	fabs	v0.2d, v0.2d
+	fabs	v1.2d, v1.2d
+	fabs	v2.2d, v2.2d
+	fabs	v3.2d, v3.2d
+	fadd	v0.2d, v0.2d, v1.2d
+	fadd	v2.2d, v2.2d, v3.2d
+#if defined(USE_MIN)
+	fmin	v0.2d, v0.2d, v2.2d
+	fminp	MAXF, v0.2d
+#else
+	fmax	v0.2d, v0.2d, v2.2d
+	fmaxp	MAXF, v0.2d
+#endif
+#endif
+.endm
+
+.macro KERNEL_F4
+#if !defined(DOUBLE)
+	ld2	{v1.4s,v2.4s}, [X], #32
+	fabs	v1.4s, v1.4s			// [X6, X4, X2, X0]
+	fabs	v2.4s, v2.4s			// [X7, X5, X3, X1]
+	fadd	v1.4s, v1.4s, v2.4s		// [X7+X6, X5+X4, X3+X2, X1+X0]
+#if defined(USE_MIN)
+	fminv	TMPF, v1.4s
+#else
+	fmaxv	TMPF, v1.4s
+#endif
+#else // DOUBLE
+	ld4	{v1.2d,v2.2d,v3.2d,v4.2d}, [X], #64
+	fabs	v1.2d, v1.2d
+	fabs	v2.2d, v2.2d
+	fabs	v3.2d, v3.2d
+	fabs	v4.2d, v4.2d
+	fadd	v1.2d, v1.2d, v2.2d
+	fadd	v3.2d, v3.2d, v4.2d
+#if defined(USE_MIN)
+	fmin	v1.2d, v1.2d, v3.2d
+	fminp	MAXF, v1.2d
+#else
+	fmax	v1.2d, v1.2d, v3.2d
+	fmaxp	MAXF, v1.2d
+#endif
+#endif
+	fcmp	MAXF, TMPF
+	fcsel	MAXF, MAXF, TMPF, COND
+.endm
+
+.macro INIT_S
+#if !defined(DOUBLE)
+	lsl	INC_X, INC_X, #3
+	ld1	{v0.2s}, [X], INC_X
+	fabs	v0.2s, v0.2s
+	ext	v1.8b, v0.8b, v0.8b, #4
+	fadd	MAXF, s0, s1
+#else
+	lsl	INC_X, INC_X, #4
+	ld1	{v0.2d}, [X], INC_X
+	fabs	v0.2d, v0.2d
+	faddp	MAXF, v0.2d
+#endif
+.endm
+
+.macro KERNEL_S1
+#if !defined(DOUBLE)
+	ld1	{v1.2s}, [X], INC_X
+	fabs	v1.2s, v1.2s
+	ext	v2.8b, v1.8b, v1.8b, #4
+	fadd	TMPF, s1, s2
+#else
+	ld1	{v1.2d}, [X], INC_X
+	fabs	v1.2d, v1.2d
+	faddp	TMPF, v1.2d
+#endif
+	fcmp	MAXF, TMPF
+	fcsel	MAXF, MAXF, TMPF, COND
+.endm
+
+/*******************************************************************************
+* End of macro definitions
+*******************************************************************************/
+
+	PROLOGUE
+
+	cmp	N, xzr
+	ble	amax_kernel_zero
+	cmp	INC_X, xzr
+	ble	amax_kernel_zero
+
+	cmp	INC_X, #1
+	bne	amax_kernel_S_BEGIN
+
+amax_kernel_F_BEGIN:
+
+	asr	I, N, #2
+	cmp	I, xzr
+	beq	amax_kernel_F1_INIT
+
+	INIT_F4
+	subs	I, I, #1
+	beq	amax_kernel_F1
+
+amax_kernel_F4:
+
+	KERNEL_F4
+
+	subs	I, I, #1
+	bne	amax_kernel_F4
+
+amax_kernel_F1:
+
+	ands	I, N, #3
+	ble	amax_kernel_L999
+
+amax_kernel_F10:
+
+	KERNEL_F1
+
+	subs    I, I, #1
+        bne     amax_kernel_F10
+
+	ret
+
+amax_kernel_F1_INIT:
+
+	INIT_F1
+	subs	N, N, #1
+	b	amax_kernel_F1
+
+amax_kernel_S_BEGIN:
+
+	INIT_S
+
+	subs	N, N, #1
+	ble	amax_kernel_L999
+
+	asr	I, N, #2
+	cmp	I, xzr
+	ble	amax_kernel_S1
+
+amax_kernel_S4:
+
+	KERNEL_S1
+	KERNEL_S1
+	KERNEL_S1
+	KERNEL_S1
+
+	subs	I, I, #1
+	bne	amax_kernel_S4
+
+amax_kernel_S1:
+
+	ands	I, N, #3
+	ble	amax_kernel_L999
+
+amax_kernel_S10:
+
+	KERNEL_S1
+
+	subs    I, I, #1
+        bne     amax_kernel_S10
+
+amax_kernel_L999:
+
+	ret
+
+amax_kernel_zero:
+
+	fmov	MAXF, REG0
+	ret
+
+	EPILOGUE