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dnl PowerPC-64 mpn_mod_1s_4p
dnl Copyright 2010, 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 cycles/limb
C POWER3/PPC630 ?
C POWER4/PPC970 9
C POWER5 9
C POWER6 13
C POWER7 3.5
C TODO
C * Optimise, in particular the cps function. This was compiler-generated and
C then hand optimised.
C INPUT PARAMETERS
define(`ap', `r3')
define(`n', `r4')
define(`d', `r5')
define(`cps', `r6')
ASM_START()
EXTERN_FUNC(mpn_invert_limb)
PROLOGUE(mpn_mod_1s_4p)
std r23, -72(r1)
ld r23, 48(cps)
std r24, -64(r1)
std r25, -56(r1)
ld r24, 32(cps)
ld r25, 24(cps)
std r26, -48(r1)
std r27, -40(r1)
ld r26, 16(cps)
std r28, -32(r1)
std r29, -24(r1)
std r30, -16(r1)
std r31, -8(r1)
ld r30, 40(cps)
rldicl. r0, n, 0,62
sldi r31, n, 3
add ap, ap, r31 C make ap point at end of operand
cmpdi cr7, r0, 2
beq cr0, L(b00)
blt cr7, L(b01)
beq cr7, L(b10)
L(b11): ld r11, -16(ap)
ld r9, -8(ap)
ld r0, -24(ap)
mulhdu r27, r11, r26
mulld r8, r11, r26
mulhdu r11, r9, r25
mulld r9, r9, r25
addc r31, r8, r0
addze r10, r27
addc r0, r9, r31
adde r9, r11, r10
addi ap, ap, -40
b L(6)
ALIGN(16)
L(b00): ld r11, -24(ap)
ld r10, -16(ap)
ld r9, -8(ap)
ld r0, -32(ap)
mulld r8, r11, r26
mulhdu r7, r10, r25
mulhdu r27, r11, r26
mulhdu r11, r9, r24
mulld r10, r10, r25
mulld r9, r9, r24
addc r31, r8, r0
addze r0, r27
addc r8, r31, r10
adde r10, r0, r7
addc r0, r9, r8
adde r9, r11, r10
addi ap, ap, -48
b L(6)
ALIGN(16)
L(b01): li r9, 0
ld r0, -8(ap)
addi ap, ap, -24
b L(6)
ALIGN(16)
L(b10): ld r9, -8(ap)
ld r0, -16(ap)
addi ap, ap, -32
ALIGN(16)
L(6): addi r10, n, 3
srdi r7, r10, 2
mtctr r7
bdz L(end)
ALIGN(16)
L(top): ld r31, -16(ap)
ld r10, -8(ap)
ld r11, 8(ap)
ld r12, 0(ap)
mulld r29, r0, r30 C rl * B4modb
mulhdu r0, r0, r30 C rl * B4modb
mulhdu r27, r10, r26
mulld r10, r10, r26
mulhdu r7, r9, r23 C rh * B5modb
mulld r9, r9, r23 C rh * B5modb
mulhdu r28, r11, r24
mulld r11, r11, r24
mulhdu r4, r12, r25
mulld r12, r12, r25
addc r8, r10, r31
addze r10, r27
addi ap, ap, -32
addc r27, r8, r12
adde r12, r10, r4
addc r11, r27, r11
adde r31, r12, r28
addc r12, r11, r29
adde r4, r31, r0
addc r0, r9, r12
adde r9, r7, r4
bdnz L(top)
L(end):
ifdef(`HAVE_LIMB_LITTLE_ENDIAN',
` lwz r3, 8(cps)',
` lwz r3, 12(cps)')
mulld r10, r9, r26
mulhdu r9, r9, r26
addc r11, r0, r10
addze r9, r9
ld r10, 0(cps)
subfic r8, r3, 64
sld r9, r9, r3
srd r8, r11, r8
sld r11, r11, r3
or r9, r8, r9
mulld r0, r9, r10
mulhdu r10, r9, r10
addi r9, r9, 1
addc r8, r0, r11
adde r0, r10, r9
mulld r0, r0, d
subf r0, r0, r11
cmpld cr7, r8, r0
bge cr7, L(9)
add r0, r0, d
L(9): cmpld cr7, r0, d
bge- cr7, L(16)
L(10): srd r3, r0, r3
ld r23, -72(r1)
ld r24, -64(r1)
ld r25, -56(r1)
ld r26, -48(r1)
ld r27, -40(r1)
ld r28, -32(r1)
ld r29, -24(r1)
ld r30, -16(r1)
ld r31, -8(r1)
blr
L(16): subf r0, d, r0
b L(10)
EPILOGUE()
PROLOGUE(mpn_mod_1s_4p_cps,toc)
mflr r0
std r29, -24(r1)
std r30, -16(r1)
mr r29, r3
std r0, 16(r1)
std r31, -8(r1)
stdu r1, -144(r1)
cntlzd r31, r4
sld r30, r4, r31
mr r3, r30
CALL( mpn_invert_limb)
subfic r9, r31, 64
li r10, 1
sld r10, r10, r31
srd r9, r3, r9
neg r0, r30
or r10, r10, r9
mulld r10, r10, r0
mulhdu r11, r10, r3
nor r11, r11, r11
subf r11, r10, r11
mulld r11, r11, r30
mulld r0, r10, r3
cmpld cr7, r0, r11
bge cr7, L(18)
add r11, r11, r30
L(18): mulhdu r9, r11, r3
add r9, r11, r9
nor r9, r9, r9
mulld r9, r9, r30
mulld r0, r11, r3
cmpld cr7, r0, r9
bge cr7, L(19)
add r9, r9, r30
L(19): mulhdu r0, r9, r3
add r0, r9, r0
nor r0, r0, r0
mulld r0, r0, r30
mulld r8, r9, r3
cmpld cr7, r8, r0
bge cr7, L(20)
add r0, r0, r30
L(20): mulhdu r8, r0, r3
add r8, r0, r8
nor r8, r8, r8
mulld r8, r8, r30
mulld r7, r0, r3
cmpld cr7, r7, r8
bge cr7, L(21)
add r8, r8, r30
L(21): srd r0, r0, r31
addi r1, r1, 144
srd r8, r8, r31
srd r10, r10, r31
srd r11, r11, r31
std r0, 40(r29)
std r31, 8(r29)
srd r9, r9, r31
ld r0, 16(r1)
ld r30, -16(r1)
std r8, 48(r29)
std r3, 0(r29)
mtlr r0
ld r31, -8(r1)
std r10, 16(r29)
std r11, 24(r29)
std r9, 32(r29)
ld r29, -24(r1)
blr
EPILOGUE()
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