summaryrefslogtreecommitdiff
path: root/Build/source/libs/gmp/gmp-6.0.0/mpn/x86_64/atom/lshift.asm
diff options
context:
space:
mode:
Diffstat (limited to 'Build/source/libs/gmp/gmp-6.0.0/mpn/x86_64/atom/lshift.asm')
-rw-r--r--Build/source/libs/gmp/gmp-6.0.0/mpn/x86_64/atom/lshift.asm123
1 files changed, 123 insertions, 0 deletions
diff --git a/Build/source/libs/gmp/gmp-6.0.0/mpn/x86_64/atom/lshift.asm b/Build/source/libs/gmp/gmp-6.0.0/mpn/x86_64/atom/lshift.asm
new file mode 100644
index 00000000000..1b37d5dccf9
--- /dev/null
+++ b/Build/source/libs/gmp/gmp-6.0.0/mpn/x86_64/atom/lshift.asm
@@ -0,0 +1,123 @@
+dnl AMD64 mpn_lshift -- mpn left shift, optimised for Atom.
+
+dnl Contributed to the GNU project by Torbjorn Granlund.
+
+dnl Copyright 2011, 2012 Free Software Foundation, Inc.
+
+dnl This file is part of the GNU MP Library.
+dnl
+dnl The GNU MP Library is free software; you can redistribute it and/or modify
+dnl it under the terms of either:
+dnl
+dnl * the GNU Lesser General Public License as published by the Free
+dnl Software Foundation; either version 3 of the License, or (at your
+dnl option) any later version.
+dnl
+dnl or
+dnl
+dnl * the GNU General Public License as published by the Free Software
+dnl Foundation; either version 2 of the License, or (at your option) any
+dnl later version.
+dnl
+dnl or both in parallel, as here.
+dnl
+dnl The GNU MP Library is distributed in the hope that it will be useful, but
+dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+dnl for more details.
+dnl
+dnl You should have received copies of the GNU General Public License and the
+dnl GNU Lesser General Public License along with the GNU MP Library. If not,
+dnl see https://www.gnu.org/licenses/.
+
+include(`../config.m4')
+
+C cycles/limb
+C AMD K8,K9 ?
+C AMD K10 ?
+C Intel P4 ?
+C Intel core2 ?
+C Intel NHM ?
+C Intel SBR ?
+C Intel atom 4.5
+C VIA nano ?
+
+C TODO
+C * Consider using 4-way unrolling. We reach 4 c/l, but the code is 2.5 times
+C larger.
+
+C INPUT PARAMETERS
+define(`rp', `%rdi')
+define(`up', `%rsi')
+define(`n', `%rdx')
+define(`cnt', `%rcx')
+
+ABI_SUPPORT(DOS64)
+ABI_SUPPORT(STD64)
+
+ASM_START()
+ TEXT
+ ALIGN(16)
+PROLOGUE(mpn_lshift)
+ FUNC_ENTRY(4)
+ lea -8(up,n,8), up
+ lea -8(rp,n,8), rp
+ shr R32(n)
+ mov (up), %rax
+ jnc L(evn)
+
+ mov %rax, %r11
+ shl R8(%rcx), %r11
+ neg R8(%rcx)
+ shr R8(%rcx), %rax
+ test n, n
+ jnz L(gt1)
+ mov %r11, (rp)
+ FUNC_EXIT()
+ ret
+
+L(gt1): mov -8(up), %r8
+ mov %r8, %r10
+ shr R8(%rcx), %r8
+ jmp L(lo1)
+
+L(evn): mov %rax, %r10
+ neg R8(%rcx)
+ shr R8(%rcx), %rax
+ mov -8(up), %r9
+ mov %r9, %r11
+ shr R8(%rcx), %r9
+ neg R8(%rcx)
+ dec n
+ lea 8(rp), rp
+ lea -8(up), up
+ jz L(end)
+
+ ALIGN(8)
+L(top): shl R8(%rcx), %r10
+ or %r10, %r9
+ shl R8(%rcx), %r11
+ neg R8(%rcx)
+ mov -8(up), %r8
+ mov %r8, %r10
+ mov %r9, -8(rp)
+ shr R8(%rcx), %r8
+ lea -16(rp), rp
+L(lo1): mov -16(up), %r9
+ or %r11, %r8
+ mov %r9, %r11
+ shr R8(%rcx), %r9
+ lea -16(up), up
+ neg R8(%rcx)
+ mov %r8, (rp)
+ dec n
+ jg L(top)
+
+L(end): shl R8(%rcx), %r10
+ or %r10, %r9
+ shl R8(%rcx), %r11
+ mov %r9, -8(rp)
+ mov %r11, -16(rp)
+ FUNC_EXIT()
+ ret
+EPILOGUE()