X-Git-Url: https://oss.titaniummirror.com/gitweb?a=blobdiff_plain;f=gmp%2Ftune%2Fpentium.asm;fp=gmp%2Ftune%2Fpentium.asm;h=369a8ea76fd458f69323c50a000cb95b2346aa1a;hb=6fed43773c9b0ce596dca5686f37ac3fc0fa11c0;hp=0000000000000000000000000000000000000000;hpb=27b11d56b743098deb193d510b337ba22dc52e5c;p=msp430-gcc.git diff --git a/gmp/tune/pentium.asm b/gmp/tune/pentium.asm new file mode 100644 index 00000000..369a8ea7 --- /dev/null +++ b/gmp/tune/pentium.asm @@ -0,0 +1,49 @@ +dnl x86 pentium time stamp counter access routine. + +dnl Copyright 1999, 2000, 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. + + .text + ALIGN(8) + +defframe(PARAM_P,4) + +PROLOGUE(speed_cyclecounter) +deflit(`FRAME',0) + pushl %ebx +FRAME_pushl() + xorl %eax, %eax + cpuid + rdtsc + movl PARAM_P, %ebx + movl %eax, (%ebx) + movl %edx, 4(%ebx) + popl %ebx + ret +EPILOGUE()