diff options
Diffstat (limited to 'gmp/mpn/x86_64/core2/gcd_1.asm')
| -rw-r--r-- | gmp/mpn/x86_64/core2/gcd_1.asm | 144 |
1 files changed, 0 insertions, 144 deletions
diff --git a/gmp/mpn/x86_64/core2/gcd_1.asm b/gmp/mpn/x86_64/core2/gcd_1.asm deleted file mode 100644 index e0cab9b4e4..0000000000 --- a/gmp/mpn/x86_64/core2/gcd_1.asm +++ /dev/null @@ -1,144 +0,0 @@ -dnl AMD64 mpn_gcd_1 optimised for Intel C2, NHM, SBR and AMD K10, BD. - -dnl Based on the K7 gcd_1.asm, by Kevin Ryde. Rehacked for AMD64 by Torbjorn -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 AMD K8,K9 8.50 -C AMD K10 4.30 -C AMD bd1 5.00 -C AMD bobcat 10.0 -C Intel P4 18.6 -C Intel core2 3.83 -C Intel NHM 5.17 -C Intel SBR 4.69 -C Intel atom 17.0 -C VIA nano 5.44 -C Numbers measured with: speed -CD -s16-64 -t48 mpn_gcd_1 - -C TODO -C * Optimise inner-loop for specific CPUs. -C * Use DIV for 1-by-1 reductions, at least for some CPUs. - -C Threshold of when to call bmod when U is one limb. Should be about -C (time_in_cycles(bmod_1,1) + call_overhead) / (cycles/bit). -define(`BMOD_THRES_LOG2', 6) - -C INPUT PARAMETERS -define(`up', `%rdi') -define(`n', `%rsi') -define(`v0', `%rdx') - -ABI_SUPPORT(DOS64) -ABI_SUPPORT(STD64) - -IFDOS(`define(`STACK_ALLOC', 40)') -IFSTD(`define(`STACK_ALLOC', 8)') - -C Undo some configure cleverness. -C The problem is that C only defines the '1c' variant, and that configure -C therefore considers modexact_1c to be the base function. It then adds a -C special fat rule for mpn_modexact_1_odd, messing up things when a cpudep -C gcd_1 exists without a corresponding cpudep mode1o. -ifdef(`WANT_FAT_BINARY', ` - define(`mpn_modexact_1_odd', `MPN_PREFIX`modexact_1_odd_x86_64'')') - - -ASM_START() - TEXT - ALIGN(16) -PROLOGUE(mpn_gcd_1) - FUNC_ENTRY(3) - mov (up), %rax C U low limb - or v0, %rax - bsf %rax, %rax C min(ctz(u0),ctz(v0)) - - bsf v0, %rcx - shr R8(%rcx), v0 - - push %rax C preserve common twos over call - push v0 C preserve v0 argument over call - sub $STACK_ALLOC, %rsp C maintain ABI required rsp alignment - - cmp $1, n - jnz L(reduce_nby1) - -C Both U and V are single limbs, reduce with bmod if u0 >> v0. - mov (up), %r8 - mov %r8, %rax - shr $BMOD_THRES_LOG2, %r8 - cmp %r8, v0 - ja L(reduced) - jmp L(bmod) - -L(reduce_nby1): - cmp $BMOD_1_TO_MOD_1_THRESHOLD, n - jl L(bmod) -IFDOS(` mov %rdx, %r8 ') -IFDOS(` mov %rsi, %rdx ') -IFDOS(` mov %rdi, %rcx ') - CALL( mpn_mod_1) - jmp L(reduced) -L(bmod): -IFDOS(` mov %rdx, %r8 ') -IFDOS(` mov %rsi, %rdx ') -IFDOS(` mov %rdi, %rcx ') - CALL( mpn_modexact_1_odd) -L(reduced): - - add $STACK_ALLOC, %rsp - pop %rdx - - bsf %rax, %rcx -C test %rax, %rax C FIXME: does this lower latency? - jnz L(mid) - jmp L(end) - - ALIGN(16) C K10 BD C2 NHM SBR -L(top): cmovc %r10, %rax C if x-y < 0 0,3 0,3 0,6 0,5 0,5 - cmovc %r9, %rdx C use x,y-x 0,3 0,3 2,8 1,7 1,7 -L(mid): shr R8(%rcx), %rax C 1,7 1,6 2,8 2,8 2,8 - mov %rdx, %r10 C 1 1 4 3 3 - sub %rax, %r10 C 2 2 5 4 4 - bsf %r10, %rcx C 3 3 6 5 5 - mov %rax, %r9 C 2 2 3 3 4 - sub %rdx, %rax C 2 2 4 3 4 - jnz L(top) C - -L(end): pop %rcx - mov %rdx, %rax - shl R8(%rcx), %rax - FUNC_EXIT() - ret -EPILOGUE() |