Imported gcc-4.4.3

[msp430-gcc.git] / gmp / tune / x86_64.asm

diff --git a/gmp/tune/x86_64.asm b/gmp/tune/x86_64.asm
new file mode 100644 (file)
index 0000000..5099090
--- /dev/null
+++ b/gmp/tune/x86_64.asm
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+dnl  x86 pentium time stamp counter access routine.
+
+dnl  Copyright 1999, 2000, 2003, 2004, 2005 Free Software Foundation, Inc.
+dnl
+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
+dnl  modify it under the terms of the GNU Lesser General Public License as
+dnl  published by the Free Software Foundation; either version 3 of the
+dnl  License, or (at your option) any later version.
+dnl
+dnl  The GNU MP Library is distributed in the hope that it will be useful,
+dnl  but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+dnl  Lesser General Public License for more details.
+dnl
+dnl  You should have received a copy of the GNU Lesser General Public License
+dnl  along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.
+
+
+include(`../config.m4')
+
+
+C void speed_cyclecounter (unsigned p[2]);
+C
+C Get the pentium rdtsc cycle counter, storing the least significant word in
+C p[0] and the most significant in p[1].
+C
+C cpuid is used to serialize execution.  On big measurements this won't be
+C significant but it may help make small single measurements more accurate.
+
+PROLOGUE(speed_cyclecounter)
+
+       C rdi   p
+
+       movq    %rbx, %r10
+       xorl    %eax, %eax
+       cpuid
+       rdtsc
+       movl    %eax, (%rdi)
+       movl    %edx, 4(%rdi)
+       movq    %r10, %rbx
+       ret
+EPILOGUE()