diff options
Diffstat (limited to 'gmp-6.3.0/mpn/arm/v5/gcd_11.asm')
| -rw-r--r-- | gmp-6.3.0/mpn/arm/v5/gcd_11.asm | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/gmp-6.3.0/mpn/arm/v5/gcd_11.asm b/gmp-6.3.0/mpn/arm/v5/gcd_11.asm new file mode 100644 index 0000000..3c2b48f --- /dev/null +++ b/gmp-6.3.0/mpn/arm/v5/gcd_11.asm @@ -0,0 +1,70 @@ +dnl ARM v5 mpn_gcd_11. + +dnl Based on the K7 gcd_1.asm, by Kevin Ryde. Rehacked for ARM by Torbjörn +dnl Granlund. + +dnl Copyright 2000-2002, 2005, 2009, 2011, 2012 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 cycles/bit (approx) +C StrongARM - +C XScale ? +C Cortex-A5 6.45 obsolete +C Cortex-A7 6.41 obsolete +C Cortex-A8 5.0 obsolete +C Cortex-A9 5.9 obsolete +C Cortex-A15 4.40 obsolete +C Cortex-A17 5.68 obsolete +C Cortex-A53 4.37 obsolete +C Numbers measured with: speed -CD -s8-32 -t24 mpn_gcd_1 + +define(`u0', `r0') +define(`v0', `r1') + +ASM_START() + TEXT + ALIGN(16) +PROLOGUE(mpn_gcd_11) + subs r3, u0, v0 C 0 + beq L(end) C + + ALIGN(16) +L(top): sub r2, v0, u0 C 0,5 + and r12, r2, r3 C 1 + clz r12, r12 C 2 + rsb r12, r12, #31 C 3 + rsbcc r3, r3, #0 C v = abs(u-v), even 1 + movcs u0, v0 C u = min(u,v) 1 + lsr v0, r3, r12 C 4 + subs r3, u0, v0 C 5 + bne L(top) C + +L(end): bx lr +EPILOGUE() |