diff options
| author | Duncan Wilkie <antigravityd@gmail.com> | 2023-11-18 06:11:09 -0600 |
|---|---|---|
| committer | Duncan Wilkie <antigravityd@gmail.com> | 2023-11-18 06:11:09 -0600 |
| commit | 11da511c784eca003deb90c23570f0873954e0de (patch) | |
| tree | e14fdd3d5d6345956d67e79ae771d0633d28362b /gmp-6.3.0/tune/x86_64.asm | |
Initial commit.
Diffstat (limited to 'gmp-6.3.0/tune/x86_64.asm')
| -rw-r--r-- | gmp-6.3.0/tune/x86_64.asm | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/gmp-6.3.0/tune/x86_64.asm b/gmp-6.3.0/tune/x86_64.asm new file mode 100644 index 0000000..b7ec44c --- /dev/null +++ b/gmp-6.3.0/tune/x86_64.asm @@ -0,0 +1,55 @@ +dnl x86 pentium time stamp counter access routine. + +dnl Copyright 1999, 2000, 2003-2005 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 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() |