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/*
* mp32opt.powerpc.S
*
* Assembler optimized multiprecision integer routines for PowerPC
*
* Compile target is GNU Assembler
*
* Copyright (c) 2000, 2001 Virtual Unlimited B.V.
*
* Author: Bob Deblier <bob@virtualunlimited.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "beecrypt.gas.h"
.file "mp32opt.powerpc.S"
.text
#if !DARWIN
# define r0 %r0
# define r3 %r3
# define r4 %r4
# define r5 %r5
# define r6 %r6
# define r7 %r7
# define r8 %r8
# define r9 %r9
# define r10 %r10
# define r11 %r11
# define r12 %r12
#else
# define L(label) L##label
#endif
C_FUNCTION_BEGIN(mp32addw)
LABEL(mp32addw)
mtctr r3
slwi r0,r3,2
add r4,r4,r0
li r0,0
lwzu r6,-4(r4)
addc r6,r6,r5
stw r6,0(r4)
bdz LOCAL(mp32addw_skip)
LOCAL(mp32addw_loop):
lwzu r6,-4(r4)
adde r6,r0,r6
stw r6,0(r4)
bdnz LOCAL(mp32addw_loop)
LOCAL(mp32addw_skip):
/* return the carry */
addze r3,r0
blr
C_FUNCTION_END(mp32addw, LOCAL(mp32addw_size))
C_FUNCTION_BEGIN(mp32subw)
LABEL(mp32subw)
mtctr r3
slwi r0,r3,2
add r4,r4,r0
li r0,0
lwz r6,-4(r4)
subfc r6,r5,r6
stwu r6,-4(r4)
bdz LOCAL(mp32subw_skip)
LOCAL(mp32subw_loop):
lwz r6,-4(r4)
subfe r6,r0,r6
stwu r6, -4(r4)
bdnz LOCAL(mp32subw_loop)
LOCAL(mp32subw_skip):
/* return the carry */
subfe r3,r0,r0
neg r3,r3
blr
C_FUNCTION_END(mp32subw, LOCAL(mp32subw_size))
C_FUNCTION_BEGIN(mp32add)
LABEL(mp32add)
mtctr r3
slwi r0,r3,2
add r4,r4,r0
add r5,r5,r0
li r0,0
lwz r6,-4(r4)
lwzu r7,-4(r5)
addc r6,r7,r6
stwu r6,-4(r4)
bdz LOCAL(mp32add_skip)
LOCAL(mp32add_loop):
lwz r6,-4(r4)
lwzu r7,-4(r5)
adde r6,r7,r6
stwu r6,-4(r4)
bdnz LOCAL(mp32add_loop)
LOCAL(mp32add_skip):
/* return the carry */
addze r3,r0
blr
C_FUNCTION_END(mp32add, LOCAL(mp32add_size))
C_FUNCTION_BEGIN(mp32sub)
LABEL(mp32sub)
mtctr r3
slwi r0,r3,2
add r4,r4,r0
add r5,r5,r0
li r0,0
lwz r6,-4(r4)
lwzu r7,-4(r5)
subfc r6,r7,r6
stwu r6,-4(r4)
bdz LOCAL(mp32sub_skip)
LOCAL(mp32sub_loop):
lwz r6,-4(r4)
lwzu r7,-4(r5)
subfe r6,r7,r6
stwu r6,-4(r4)
bdnz LOCAL(mp32sub_loop)
LOCAL(mp32sub_skip):
/* return the carry */
subfe r3,r0,r0
neg r3,r3
blr
C_FUNCTION_END(mp32sub, LOCAL(mp32sub_size))
C_FUNCTION_BEGIN(mp32multwo)
LABEL(mp32multwo)
mtctr r3
slwi r0,r3,2
add r4,r4,r0
li r0,0
lwz r6,-4(r4)
addc r6,r6,r6
stwu r6,-4(r4)
bdz LOCAL(mp32multwo_skip)
LOCAL(mp32multwo_loop):
lwz r6,-4(r4)
adde r6,r6,r6
stwu r6,-4(r4)
bdnz LOCAL(mp32multwo_loop)
LOCAL(mp32multwo_skip):
/* return the carry */
addze r3,r0
blr
C_FUNCTION_END(mp32multwo, LOCAL(mp32multwo_size))
C_FUNCTION_BEGIN(mp32setmul)
LABEL(mp32setmul)
mtctr r3
slwi r0,r3,2
add r4,r4,r0
add r5,r5,r0
li r3,0
LOCAL(mp32setmul_loop):
lwzu r7,-4(r5)
mullw r8,r7,r6
addc r8,r8,r3
mulhwu r9,r7,r6
addze r3,r9
stwu r8,-4(r4)
bdnz LOCAL(mp32setmul_loop)
blr
C_FUNCTION_END(mp32setmul, LOCAL(mp32setmul_size))
C_FUNCTION_BEGIN(mp32addmul)
LABEL(mp32addmul)
mtctr r3
slwi r0,r3,2
add r4,r4,r0
add r5,r5,r0
li r3,0
LOCAL(mp32addmul_loop):
lwzu r8,-4(r5)
lwzu r7,-4(r4)
mullw r9,r8,r6
addc r9,r9,r3
mulhwu r10,r8,r6
addze r3,r10
addc r9,r9,r7
addze r3,r3
stw r9,0(r4)
bdnz LOCAL(mp32addmul_loop)
blr
C_FUNCTION_END(mp32addmul, LOCAL(mp32addmul_size))
C_FUNCTION_BEGIN(mp32addsqrtrc)
LABEL(mp32addsqrtrc)
mtctr r3
slwi r0,r3,2
add r4,r4,r0
add r5,r5,r0
add r4,r4,r0
li r3,0
LOCAL(mp32addsqrtrc_loop):
lwzu r0,-4(r5)
lwz r6,-8(r4)
lwz r7,-4(r4)
mullw r9,r0,r0
addc r9,r9,r3
mulhwu r8,r0,r0
addze r8,r8
li r3,0
addc r7,r7,r9
adde r6,r6,r8
addze r3,r3
stw r7,-4(r4)
stwu r6,-8(r4)
bdnz LOCAL(mp32addsqrtrc_loop)
blr
C_FUNCTION_END(mp32addsqrtrc, LOCAL(mp32addsqrtrc_size))
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