1 files changed, 176 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc64/multiarch/memcpy-power8-cached.S b/sysdeps/powerpc/powerpc64/multiarch/memcpy-power8-cached.S
new file mode 100644
index 0000000000..e8bea91ca6
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/memcpy-power8-cached.S
@@ -0,0 +1,176 @@
+/* Optimized memcpy implementation for cached memory on PowerPC64/POWER8.
+   Copyright (C) 2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+
+
+/* __ptr_t [r3] memcpy (__ptr_t dst [r3], __ptr_t src [r4], size_t len [r5]);
+   Returns 'dst'.  */
+
+	.machine power8
+ENTRY_TOCLESS (__memcpy_power8_cached, 5)
+	CALL_MCOUNT 3
+
+	cmpldi	cr7,r5,15
+	bgt	cr7,L(ge_16)
+	andi.	r9,r5,0x1
+	mr	r9,r3
+	beq	cr0,1f
+	lbz	r10,0(r4)
+	addi	r9,r3,1
+	addi	r4,r4,1
+	stb	r10,0(r3)
+1:
+	andi.	r10,r5,0x2
+	beq	cr0,2f
+	lhz	r10,0(r4)
+	addi	r9,r9,2
+	addi	r4,r4,2
+	sth	r10,-2(r9)
+2:
+	andi.	r10,r5,0x4
+	beq	cr0,3f
+	lwz	r10,0(r4)
+	addi	r9,9,4
+	addi	r4,4,4
+	stw	r10,-4(r9)
+3:
+	andi.	r10,r5,0x8
+	beqlr	cr0
+	ld	r10,0(r4)
+	std	r10,0(r9)
+	blr
+
+	.align 4
+L(ge_16):
+	cmpldi	cr7,r5,32
+	ble	cr7,L(ge_16_le_32)
+	cmpldi	cr7,r5,64
+	ble	cr7,L(gt_32_le_64)
+
+	/* Align dst to 16 bytes.  */
+	andi.	r9,r3,0xf
+	mr	r12,r3
+	beq	cr0,L(dst_is_align_16)
+	lxvd2x	v0,0,r4
+	subfic	r12,r9,16
+	subf	r5,r12,r5
+	add	r4,r4,r12
+	add	r12,r3,r12
+	stxvd2x	v0,0,r3
+L(dst_is_align_16):
+	cmpldi	cr7,r5,127
+	ble	cr7,L(tail_copy)
+	mr	r9,r12
+	srdi	r10,r5,7
+	li	r11,16
+	li	r6,32
+	li	r7,48
+	mtctr	r10
+	clrrdi	r0,r5,7
+
+	/* Main loop, copy 128 bytes each time.  */
+	.align 4
+L(copy_128):
+	lxvd2x	v10,0,r4
+	lxvd2x	v11,r4,r11
+	addi	r8,r4,64
+	addi	r10,r9,64
+	lxvd2x	v12,r4,r6
+	lxvd2x	v0,r4,r7
+	addi	r4,r4,128
+	stxvd2x v10,0,r9
+	stxvd2x v11,r9,r11
+	stxvd2x v12,r9,r6
+	stxvd2x v0,r9,r7
+	addi	r9,r9,128
+	lxvd2x	v10,0,r8
+	lxvd2x	v11,r8,r11
+	lxvd2x	v12,r8,r6
+	lxvd2x	v0,r8,r7
+	stxvd2x v10,0,r10
+	stxvd2x v11,r10,r11
+	stxvd2x v12,r10,r6
+	stxvd2x v0,r10,r7
+	bdnz	L(copy_128)
+
+	add	r12,r12,r0
+	rldicl 	r5,r5,0,57
+L(tail_copy):
+	cmpldi	cr7,r5,63
+	ble	cr7,L(tail_le_64)
+	li	r8,16
+	li	r10,32
+	lxvd2x	v10,0,r4
+	li	r9,48
+	addi	r5,r5,-64
+	lxvd2x	v11,r4,r8
+	lxvd2x	v12,r4,r10
+	lxvd2x	v0,r4,r9
+	addi	r4,r4,64
+	stxvd2x	v10,0,r12
+	stxvd2x	v11,r12,r8
+	stxvd2x	v12,r12,r10
+	stxvd2x	v0,r12,9
+	addi	r12,r12,64
+
+L(tail_le_64):
+	cmpldi	cr7,r5,32
+	bgt	cr7,L(tail_gt_32_le_64)
+	cmpdi	cr7,r5,0
+	beqlr	cr7
+	addi	r5,r5,-32
+	li	r9,16
+	add	r8,r4,r5
+	add	r10,r12,r5
+	lxvd2x	v12,r4,r5
+	lxvd2x	v0,r8,r9
+	stxvd2x	v12,r12,r5
+	stxvd2x	v0,r10,r9
+	blr
+
+	.align 4
+L(ge_16_le_32):
+	addi	r5,r5,-16
+	lxvd2x	v0,0,r4
+	lxvd2x	v1,r4,r5
+	stxvd2x	v0,0,r3
+	stxvd2x	v1,r3,r5
+	blr
+
+	.align 4
+L(gt_32_le_64):
+	mr	r12,r3
+
+	.align 4
+L(tail_gt_32_le_64):
+	li	r9,16
+	lxvd2x	v0,0,r4
+	addi	r5,r5,-32
+	lxvd2x	v1,r4,r9
+	add	r8,r4,r5
+	lxvd2x	v2,r4,r5
+	add	r10,r12,r5
+	lxvd2x	v3,r8,r9
+	stxvd2x	v0,0,r12
+	stxvd2x	v1,r12,r9
+	stxvd2x	v2,r12,r5
+	stxvd2x	v3,r10,r9
+	blr
+
+END_GEN_TB (__memcpy_power8_cached,TB_TOCLESS)