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|
dnl x86 mpn_mul_basecase -- Multiply two limb vectors and store the result in
dnl a third limb vector.
dnl Contributed to the GNU project by Torbjorn Granlund and Marco Bodrato.
dnl Copyright 2011 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 TODO
C * Check if 'jmp N(%esp)' is well-predicted enough to allow us to combine the
C 4 large loops into one; we could use it for the outer loop branch.
C * Optimise code outside of inner loops.
C * Write combined addmul_1 feed-in a wind-down code, and use when iterating
C outer each loop. ("Overlapping software pipelining")
C * Postpone push of ebx until we know vn > 1. Perhaps use caller-saves regs
C for inlined mul_1, allowing us to postpone all pushes.
C * Perhaps write special code for vn <= un < M, for some small M.
C void mpn_mul_basecase (mp_ptr wp,
C mp_srcptr xp, mp_size_t xn,
C mp_srcptr yp, mp_size_t yn);
C
define(`rp', `%edi')
define(`up', `%esi')
define(`un', `%ecx')
define(`vp', `%ebp')
define(`vn', `36(%esp)')
TEXT
ALIGN(16)
PROLOGUE(mpn_mul_basecase)
push %edi
push %esi
push %ebx
push %ebp
mov 20(%esp), rp
mov 24(%esp), up
mov 28(%esp), un
mov 32(%esp), vp
movd (up), %mm0
movd (vp), %mm7
pmuludq %mm7, %mm0
pxor %mm6, %mm6
mov un, %eax
and $3, %eax
jz L(of0)
cmp $2, %eax
jc L(of1)
jz L(of2)
C ================================================================
jmp L(m3)
ALIGN(16)
L(lm3): movd -4(up), %mm0
pmuludq %mm7, %mm0
psrlq $32, %mm6
lea 16(rp), rp
paddq %mm0, %mm6
movd (up), %mm0
pmuludq %mm7, %mm0
movd %mm6, -4(rp)
psrlq $32, %mm6
L(m3): paddq %mm0, %mm6
movd 4(up), %mm0
pmuludq %mm7, %mm0
movd %mm6, (rp)
psrlq $32, %mm6
paddq %mm0, %mm6
movd 8(up), %mm0
pmuludq %mm7, %mm0
movd %mm6, 4(rp)
psrlq $32, %mm6
paddq %mm0, %mm6
sub $4, un
movd %mm6, 8(rp)
lea 16(up), up
ja L(lm3)
psrlq $32, %mm6
movd %mm6, 12(rp)
decl vn
jz L(done)
lea -8(rp), rp
L(ol3): mov 28(%esp), un
neg un
lea 4(vp), vp
movd (vp), %mm7 C read next V limb
mov 24(%esp), up
lea 16(rp,un,4), rp
movd (up), %mm0
pmuludq %mm7, %mm0
sar $2, un
movd 4(up), %mm1
movd %mm0, %ebx
pmuludq %mm7, %mm1
lea -8(up), up
xor %edx, %edx C zero edx and CF
jmp L(a3)
L(la3): movd 4(up), %mm1
adc $0, %edx
add %eax, 12(rp)
movd %mm0, %ebx
pmuludq %mm7, %mm1
lea 16(rp), rp
psrlq $32, %mm0
adc %edx, %ebx
movd %mm0, %edx
movd %mm1, %eax
movd 8(up), %mm0
pmuludq %mm7, %mm0
adc $0, %edx
add %ebx, (rp)
psrlq $32, %mm1
adc %edx, %eax
movd %mm1, %edx
movd %mm0, %ebx
movd 12(up), %mm1
pmuludq %mm7, %mm1
adc $0, %edx
add %eax, 4(rp)
L(a3): psrlq $32, %mm0
adc %edx, %ebx
movd %mm0, %edx
movd %mm1, %eax
lea 16(up), up
movd (up), %mm0
adc $0, %edx
add %ebx, 8(rp)
psrlq $32, %mm1
adc %edx, %eax
movd %mm1, %edx
pmuludq %mm7, %mm0
inc un
jnz L(la3)
adc un, %edx C un is zero here
add %eax, 12(rp)
movd %mm0, %ebx
psrlq $32, %mm0
adc %edx, %ebx
movd %mm0, %eax
adc un, %eax
add %ebx, 16(rp)
adc un, %eax
mov %eax, 20(rp)
decl vn
jnz L(ol3)
jmp L(done)
C ================================================================
ALIGN(16)
L(lm0): movd (up), %mm0
pmuludq %mm7, %mm0
psrlq $32, %mm6
lea 16(rp), rp
L(of0): paddq %mm0, %mm6
movd 4(up), %mm0
pmuludq %mm7, %mm0
movd %mm6, (rp)
psrlq $32, %mm6
paddq %mm0, %mm6
movd 8(up), %mm0
pmuludq %mm7, %mm0
movd %mm6, 4(rp)
psrlq $32, %mm6
paddq %mm0, %mm6
movd 12(up), %mm0
pmuludq %mm7, %mm0
movd %mm6, 8(rp)
psrlq $32, %mm6
paddq %mm0, %mm6
sub $4, un
movd %mm6, 12(rp)
lea 16(up), up
ja L(lm0)
psrlq $32, %mm6
movd %mm6, 16(rp)
decl vn
jz L(done)
lea -4(rp), rp
L(ol0): mov 28(%esp), un
neg un
lea 4(vp), vp
movd (vp), %mm7 C read next V limb
mov 24(%esp), up
lea 20(rp,un,4), rp
movd (up), %mm1
pmuludq %mm7, %mm1
sar $2, un
movd 4(up), %mm0
lea -4(up), up
movd %mm1, %eax
pmuludq %mm7, %mm0
xor %edx, %edx C zero edx and CF
jmp L(a0)
L(la0): movd 4(up), %mm1
adc $0, %edx
add %eax, 12(rp)
movd %mm0, %ebx
pmuludq %mm7, %mm1
lea 16(rp), rp
psrlq $32, %mm0
adc %edx, %ebx
movd %mm0, %edx
movd %mm1, %eax
movd 8(up), %mm0
pmuludq %mm7, %mm0
adc $0, %edx
add %ebx, (rp)
L(a0): psrlq $32, %mm1
adc %edx, %eax
movd %mm1, %edx
movd %mm0, %ebx
movd 12(up), %mm1
pmuludq %mm7, %mm1
adc $0, %edx
add %eax, 4(rp)
psrlq $32, %mm0
adc %edx, %ebx
movd %mm0, %edx
movd %mm1, %eax
lea 16(up), up
movd (up), %mm0
adc $0, %edx
add %ebx, 8(rp)
psrlq $32, %mm1
adc %edx, %eax
movd %mm1, %edx
pmuludq %mm7, %mm0
inc un
jnz L(la0)
adc un, %edx C un is zero here
add %eax, 12(rp)
movd %mm0, %ebx
psrlq $32, %mm0
adc %edx, %ebx
movd %mm0, %eax
adc un, %eax
add %ebx, 16(rp)
adc un, %eax
mov %eax, 20(rp)
decl vn
jnz L(ol0)
jmp L(done)
C ================================================================
ALIGN(16)
L(lm1): movd -12(up), %mm0
pmuludq %mm7, %mm0
psrlq $32, %mm6
lea 16(rp), rp
paddq %mm0, %mm6
movd -8(up), %mm0
pmuludq %mm7, %mm0
movd %mm6, -12(rp)
psrlq $32, %mm6
paddq %mm0, %mm6
movd -4(up), %mm0
pmuludq %mm7, %mm0
movd %mm6, -8(rp)
psrlq $32, %mm6
paddq %mm0, %mm6
movd (up), %mm0
pmuludq %mm7, %mm0
movd %mm6, -4(rp)
psrlq $32, %mm6
L(of1): paddq %mm0, %mm6
sub $4, un
movd %mm6, (rp)
lea 16(up), up
ja L(lm1)
psrlq $32, %mm6
movd %mm6, 4(rp)
decl vn
jz L(done)
lea -16(rp), rp
L(ol1): mov 28(%esp), un
neg un
lea 4(vp), vp
movd (vp), %mm7 C read next V limb
mov 24(%esp), up
lea 24(rp,un,4), rp
movd (up), %mm0
pmuludq %mm7, %mm0
sar $2, un
movd %mm0, %ebx
movd 4(up), %mm1
pmuludq %mm7, %mm1
xor %edx, %edx C zero edx and CF
inc un
jmp L(a1)
L(la1): movd 4(up), %mm1
adc $0, %edx
add %eax, 12(rp)
movd %mm0, %ebx
pmuludq %mm7, %mm1
lea 16(rp), rp
L(a1): psrlq $32, %mm0
adc %edx, %ebx
movd %mm0, %edx
movd %mm1, %eax
movd 8(up), %mm0
pmuludq %mm7, %mm0
adc $0, %edx
add %ebx, (rp)
psrlq $32, %mm1
adc %edx, %eax
movd %mm1, %edx
movd %mm0, %ebx
movd 12(up), %mm1
pmuludq %mm7, %mm1
adc $0, %edx
add %eax, 4(rp)
psrlq $32, %mm0
adc %edx, %ebx
movd %mm0, %edx
movd %mm1, %eax
lea 16(up), up
movd (up), %mm0
adc $0, %edx
add %ebx, 8(rp)
psrlq $32, %mm1
adc %edx, %eax
movd %mm1, %edx
pmuludq %mm7, %mm0
inc un
jnz L(la1)
adc un, %edx C un is zero here
add %eax, 12(rp)
movd %mm0, %ebx
psrlq $32, %mm0
adc %edx, %ebx
movd %mm0, %eax
adc un, %eax
add %ebx, 16(rp)
adc un, %eax
mov %eax, 20(rp)
decl vn
jnz L(ol1)
jmp L(done)
C ================================================================
ALIGN(16)
L(lm2): movd -8(up), %mm0
pmuludq %mm7, %mm0
psrlq $32, %mm6
lea 16(rp), rp
paddq %mm0, %mm6
movd -4(up), %mm0
pmuludq %mm7, %mm0
movd %mm6, -8(rp)
psrlq $32, %mm6
paddq %mm0, %mm6
movd (up), %mm0
pmuludq %mm7, %mm0
movd %mm6, -4(rp)
psrlq $32, %mm6
L(of2): paddq %mm0, %mm6
movd 4(up), %mm0
pmuludq %mm7, %mm0
movd %mm6, (rp)
psrlq $32, %mm6
paddq %mm0, %mm6
sub $4, un
movd %mm6, 4(rp)
lea 16(up), up
ja L(lm2)
psrlq $32, %mm6
movd %mm6, 8(rp)
decl vn
jz L(done)
lea -12(rp), rp
L(ol2): mov 28(%esp), un
neg un
lea 4(vp), vp
movd (vp), %mm7 C read next V limb
mov 24(%esp), up
lea 12(rp,un,4), rp
movd (up), %mm1
pmuludq %mm7, %mm1
sar $2, un
movd 4(up), %mm0
lea 4(up), up
movd %mm1, %eax
xor %edx, %edx C zero edx and CF
jmp L(lo2)
L(la2): movd 4(up), %mm1
adc $0, %edx
add %eax, 12(rp)
movd %mm0, %ebx
pmuludq %mm7, %mm1
lea 16(rp), rp
psrlq $32, %mm0
adc %edx, %ebx
movd %mm0, %edx
movd %mm1, %eax
movd 8(up), %mm0
pmuludq %mm7, %mm0
adc $0, %edx
add %ebx, (rp)
psrlq $32, %mm1
adc %edx, %eax
movd %mm1, %edx
movd %mm0, %ebx
movd 12(up), %mm1
pmuludq %mm7, %mm1
adc $0, %edx
add %eax, 4(rp)
psrlq $32, %mm0
adc %edx, %ebx
movd %mm0, %edx
movd %mm1, %eax
lea 16(up), up
movd (up), %mm0
adc $0, %edx
add %ebx, 8(rp)
L(lo2): psrlq $32, %mm1
adc %edx, %eax
movd %mm1, %edx
pmuludq %mm7, %mm0
inc un
jnz L(la2)
adc un, %edx C un is zero here
add %eax, 12(rp)
movd %mm0, %ebx
psrlq $32, %mm0
adc %edx, %ebx
movd %mm0, %eax
adc un, %eax
add %ebx, 16(rp)
adc un, %eax
mov %eax, 20(rp)
decl vn
jnz L(ol2)
C jmp L(done)
C ================================================================
L(done):
emms
pop %ebp
pop %ebx
pop %esi
pop %edi
ret
EPILOGUE()
|
