diff options
Diffstat (limited to 'gmp-6.3.0/mpn/x86/k7/gcd_11.asm')
| -rw-r--r-- | gmp-6.3.0/mpn/x86/k7/gcd_11.asm | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/gmp-6.3.0/mpn/x86/k7/gcd_11.asm b/gmp-6.3.0/mpn/x86/k7/gcd_11.asm new file mode 100644 index 0000000..2648dfd --- /dev/null +++ b/gmp-6.3.0/mpn/x86/k7/gcd_11.asm @@ -0,0 +1,107 @@ +dnl x86 mpn_gcd_11 optimised for AMD K7. + +dnl Contributed to the GNU project by by Kevin Ryde. Rehacked by Torbjorn +dnl Granlund. + +dnl Copyright 2000-2002, 2005, 2009, 2011, 2012, 2014, 2015 Free Software +dnl 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/bit (approx) +C AMD K7 5.31 +C AMD K8,K9 5.33 +C AMD K10 5.30 +C AMD bd1 ? +C AMD bobcat 7.02 +C Intel P4-2 10.1 +C Intel P4-3/4 10.0 +C Intel P6/13 5.88 +C Intel core2 6.26 +C Intel NHM 6.83 +C Intel SBR 8.50 +C Intel atom 8.90 +C VIA nano ? +C Numbers measured with: speed -CD -s16-32 -t16 mpn_gcd_1 + + +C ctz_table[n] is the number of trailing zeros on n, or MAXSHIFT if n==0. + +deflit(MAXSHIFT, 6) +deflit(MASK, eval((m4_lshift(1,MAXSHIFT))-1)) + +DEF_OBJECT(ctz_table,64) + .byte MAXSHIFT +forloop(i,1,MASK, +` .byte m4_count_trailing_zeros(i) +') +END_OBJECT(ctz_table) + + +define(`u0', `%eax') +define(`v0', `%edx') + +ASM_START() + TEXT + ALIGN(16) +PROLOGUE(mpn_gcd_11) + push %edi + push %esi + + mov 12(%esp), %eax + mov 16(%esp), %edx + + LEAL( ctz_table, %esi) + jmp L(odd) + + ALIGN(16) C +L(top): cmovc( %ecx, %eax) C u = |v - u| + cmovc( %edi, %edx) C v = min(u,v) +L(mid): and $MASK, %ecx C + movzbl (%esi,%ecx), %ecx C + jz L(shift_alot) C + shr %cl, %eax C +L(odd): mov %eax, %edi C + mov %edx, %ecx C + sub %eax, %ecx C + sub %edx, %eax C + jnz L(top) C + +L(end): mov %edx, %eax + pop %esi + pop %edi + ret + +L(shift_alot): + shr $MAXSHIFT, %eax + mov %eax, %ecx + jmp L(mid) +EPILOGUE() +ASM_END() |