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 norm unorm frac
C AMD K8,K9 15 15 12
C AMD K10 15 15 12
C Intel P4 44 44 43
C Intel core2 24 24 19.5
C Intel corei 19 19 18
C Intel atom 51 51 36
C VIA nano 46 44 22.5
C mp_limb_t
C mpn_divrem_1 (mp_ptr qp, mp_size_t fn,
C mp_srcptr np, mp_size_t nn, mp_limb_t d)
C mp_limb_t
C mpn_preinv_divrem_1 (mp_ptr qp, mp_size_t fn,
C mp_srcptr np, mp_size_t nn, mp_limb_t d,
C mp_limb_t dinv, int cnt)
C INPUT PARAMETERS
define(`qp', `%rdi')
define(`fn_param', `%rsi')
define(`up_param', `%rdx')
define(`un_param', `%rcx')
define(`d', `%r8')
define(`dinv', `%r9') C only for mpn_preinv_divrem_1
C shift passed on stack C only for mpn_preinv_divrem_1
L(unnormalized):
test un, un je L(44) mov -8(up,un,8), %rax cmp d, %rax
jae L(44) mov %rbp, (qp) mov %rax, %rbp lea -8(qp), qp je L(ret) dec un
L(44):
bsr d, %rcx
not R32(%rcx)
sal R8(%rcx), d
sal R8(%rcx), %rbp
push %rcx
IFSTD(` push %rdi ')
IFSTD(` push %rsi ') push %r8
IFSTD(` sub $8, %rsp ')
IFSTD(` mov d, %rdi ')
IFDOS(` sub $40, %rsp ')
IFDOS(` mov d, %rcx ')
ASSERT(nz, `test $15, %rsp') CALL( mpn_invert_limb)
IFSTD(` add $8, %rsp ')
IFDOS(` add $40, %rsp ') pop %r8
IFSTD(` pop %rsi ')
IFSTD(` pop %rdi ') pop %rcx
mov %rax, dinv mov %rbp, %rax
test un, un je L(frac)
L(ent): mov -8(up,un,8), %rbp shr R8(%rcx), %rax
shld R8(%rcx), %rbp, %rax sub $2, un
js L(end)
L(ufx): sub d, %rax inc %r11 jmp L(uok)
L(efx): sub d, %rax inc %r13 jmp L(eok)
L(frac):mov d, %rbp neg %rbp jmp L(fent)
ALIGN(16) C K8-K10 P6-CNR P6-NHM P4
L(ftop):mul dinv C 0,12 0,17 0,17 add %r11, %rdx C 5 8 10 mov %rax, %r11 C 4 8 3 mov %rdx, %r13 C 6 9 11
imul %rbp, %rdx C 6 9 11 mov d, %rax C add %rdx, %rax C 10 14 14 cmp %r11, %rdx C 10 14 14
cmovc %rdx, %rax C 11 15 15 adc $-1, %r13 C mov %r13, (qp) C sub $8, qp C
L(fent):lea 1(%rax), %r11 C dec fn C
jns L(ftop) C
shr R8(%rcx), %rax
L(ret): pop %rbx pop %rbp pop %r12 pop %r13
FUNC_EXIT() ret
EPILOGUE()
Messung V0.5
¤ Dauer der Verarbeitung: 0.1 Sekunden
(vorverarbeitet)
¤
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