about summary refs log tree commit diff
path: root/sysdeps/x86_64/addmul_1.S
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/x86_64/addmul_1.S')
-rw-r--r--sysdeps/x86_64/addmul_1.S46
1 files changed, 46 insertions, 0 deletions
diff --git a/sysdeps/x86_64/addmul_1.S b/sysdeps/x86_64/addmul_1.S
new file mode 100644
index 0000000000..bdb5226a33
--- /dev/null
+++ b/sysdeps/x86_64/addmul_1.S
@@ -0,0 +1,46 @@
+/* AMD64 __mpn_addmul_1 -- Multiply a limb vector with a limb and add
+   the result to a second limb vector.
+   Copyright (C) 2004 Free Software Foundation, Inc.
+   This file is part of the GNU MP Library.
+
+   The GNU MP 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 MP 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 MP Library; see the file COPYING.LIB.  If not, write to
+   the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+   MA 02111-1307, USA. */
+
+#include "sysdep.h"
+#include "asm-syntax.h"
+
+	.text
+ENTRY (__mpn_addmul_1)
+	movq	%rdx, %r11
+	leaq	(%rsi,%rdx,8), %rsi
+	leaq	(%rdi,%rdx,8), %rdi
+	negq	%r11
+	xorl	%r8d, %r8d
+	xorl	%r10d, %r10d
+	.p2align 2
+L(loop):
+	movq	(%rsi,%r11,8), %rax
+	mulq	%rcx
+	addq	(%rdi,%r11,8), %rax
+	adcq	%r10, %rdx
+	addq	%r8, %rax
+	movq	%r10, %r8
+	movq	%rax, (%rdi,%r11,8)
+	adcq	%rdx, %r8
+	incq	%r11
+	jne	L(loop)
+	movq	%r8, %rax
+	ret
+END (__mpn_addmul_1)