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/mpn/sparc64/gcd_11.asm | |
Initial commit.
Diffstat (limited to 'gmp-6.3.0/mpn/sparc64/gcd_11.asm')
| -rw-r--r-- | gmp-6.3.0/mpn/sparc64/gcd_11.asm | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/gmp-6.3.0/mpn/sparc64/gcd_11.asm b/gmp-6.3.0/mpn/sparc64/gcd_11.asm new file mode 100644 index 0000000..2dd200d --- /dev/null +++ b/gmp-6.3.0/mpn/sparc64/gcd_11.asm @@ -0,0 +1,87 @@ +dnl SPARC64 mpn_gcd_11. + +dnl Based on the K7 gcd_1.asm, by Kevin Ryde. Rehacked for SPARC by Torbjörn +dnl Granlund. + +dnl Copyright 2000-2002, 2005, 2009, 2011-2013, 2021 Free Software Foundation, +dnl 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 UltraSPARC 1&2: 5.1 +C UltraSPARC 3: 5.0 +C UltraSPARC T1: 11.4 +C UltraSPARC T3: 10 +C UltraSPARC T4: 6 +C Numbers measured with: speed -CD -s32-64 -t32 mpn_gcd_1 + +C ctz_table[n] is the number of trailing zeros on n, or MAXSHIFT if n==0. + +deflit(MAXSHIFT, 7) +deflit(MASK, eval((m4_lshift(1,MAXSHIFT))-1)) + + RODATA + TYPE(ctz_table,object) +ctz_table: + .byte MAXSHIFT +forloop(i,1,MASK, +` .byte m4_count_trailing_zeros(i) +') + SIZE(ctz_table,.-ctz_table) + +define(`u0', `%o0') +define(`v0', `%o1') + +ASM_START() +PROLOGUE(mpn_gcd_11) + LEA64(ctz_table, o5, g4) + b L(odd) + mov u0, %o4 + + ALIGN(16) +L(top): movcc %xcc, %o4, v0 C v = min(u,v) + movcc %xcc, %o2, %o0 C u = |v - u] +L(mid): ldub [%o5+%g1], %g5 C + brz,pn %g1, L(shift_alot) C + srlx %o0, %g5, %o4 C new u, odd +L(odd): subcc v0, %o4, %o2 C v - u, set flags for branch and movcc + sub %o4, v0, %o0 C u - v + bnz,pt %xcc, L(top) C + and %o2, MASK, %g1 C extract low MAXSHIFT bits from (v-u) + + retl + mov v0, %o0 + +L(shift_alot): + mov %o4, %o0 + b L(mid) + and %o4, MASK, %g1 C +EPILOGUE() |