mirror of
https://github.com/pineappleEA/pineapple-src.git
synced 2024-11-29 18:18:28 -05:00
149 lines
3.2 KiB
ArmAsm
149 lines
3.2 KiB
ArmAsm
|
.text
|
|||
|
|
|
|||
|
|
.global bn_mul_mont
|
|||
|
|
.type bn_mul_mont,%function
|
|||
|
|
|
|||
|
|
.align 2
|
|||
|
|
bn_mul_mont:
|
|||
|
|
stmdb sp!,{r0,r2} @ sp points at argument block
|
|||
|
|
ldr r0,[sp,#3*4] @ load num
|
|||
|
|
cmp r0,#2
|
|||
|
|
movlt r0,#0
|
|||
|
|
addlt sp,sp,#2*4
|
|||
|
|
blt .Labrt
|
|||
|
|
|
|||
|
|
stmdb sp!,{r4-r12,lr} @ save 10 registers
|
|||
|
|
|
|||
|
|
mov r0,r0,lsl#2 @ rescale r0 for byte count
|
|||
|
|
sub sp,sp,r0 @ alloca(4*num)
|
|||
|
|
sub sp,sp,#4 @ +extra dword
|
|||
|
|
sub r0,r0,#4 @ "num=num-1"
|
|||
|
|
add r4,r2,r0 @ &bp[num-1]
|
|||
|
|
|
|||
|
|
add r0,sp,r0 @ r0 to point at &tp[num-1]
|
|||
|
|
ldr r8,[r0,#14*4] @ &n0
|
|||
|
|
ldr r2,[r2] @ bp[0]
|
|||
|
|
ldr r5,[r1],#4 @ ap[0],ap++
|
|||
|
|
ldr r6,[r3],#4 @ np[0],np++
|
|||
|
|
ldr r8,[r8] @ *n0
|
|||
|
|
str r4,[r0,#15*4] @ save &bp[num]
|
|||
|
|
|
|||
|
|
umull r10,r11,r5,r2 @ ap[0]*bp[0]
|
|||
|
|
str r8,[r0,#14*4] @ save n0 value
|
|||
|
|
mul r8,r10,r8 @ "tp[0]"*n0
|
|||
|
|
mov r12,#0
|
|||
|
|
umlal r10,r12,r6,r8 @ np[0]*n0+"t[0]"
|
|||
|
|
mov r4,sp
|
|||
|
|
|
|||
|
|
.L1st:
|
|||
|
|
ldr r5,[r1],#4 @ ap[j],ap++
|
|||
|
|
mov r10,r11
|
|||
|
|
ldr r6,[r3],#4 @ np[j],np++
|
|||
|
|
mov r11,#0
|
|||
|
|
umlal r10,r11,r5,r2 @ ap[j]*bp[0]
|
|||
|
|
mov r14,#0
|
|||
|
|
umlal r12,r14,r6,r8 @ np[j]*n0
|
|||
|
|
adds r12,r12,r10
|
|||
|
|
str r12,[r4],#4 @ tp[j-1]=,tp++
|
|||
|
|
adc r12,r14,#0
|
|||
|
|
cmp r4,r0
|
|||
|
|
bne .L1st
|
|||
|
|
|
|||
|
|
adds r12,r12,r11
|
|||
|
|
ldr r4,[r0,#13*4] @ restore bp
|
|||
|
|
mov r14,#0
|
|||
|
|
ldr r8,[r0,#14*4] @ restore n0
|
|||
|
|
adc r14,r14,#0
|
|||
|
|
str r12,[r0] @ tp[num-1]=
|
|||
|
|
str r14,[r0,#4] @ tp[num]=
|
|||
|
|
|
|||
|
|
.Louter:
|
|||
|
|
sub r7,r0,sp @ "original" r0-1 value
|
|||
|
|
sub r1,r1,r7 @ "rewind" ap to &ap[1]
|
|||
|
|
ldr r2,[r4,#4]! @ *(++bp)
|
|||
|
|
sub r3,r3,r7 @ "rewind" np to &np[1]
|
|||
|
|
ldr r5,[r1,#-4] @ ap[0]
|
|||
|
|
ldr r10,[sp] @ tp[0]
|
|||
|
|
ldr r6,[r3,#-4] @ np[0]
|
|||
|
|
ldr r7,[sp,#4] @ tp[1]
|
|||
|
|
|
|||
|
|
mov r11,#0
|
|||
|
|
umlal r10,r11,r5,r2 @ ap[0]*bp[i]+tp[0]
|
|||
|
|
str r4,[r0,#13*4] @ save bp
|
|||
|
|
mul r8,r10,r8
|
|||
|
|
mov r12,#0
|
|||
|
|
umlal r10,r12,r6,r8 @ np[0]*n0+"tp[0]"
|
|||
|
|
mov r4,sp
|
|||
|
|
|
|||
|
|
.Linner:
|
|||
|
|
ldr r5,[r1],#4 @ ap[j],ap++
|
|||
|
|
adds r10,r11,r7 @ +=tp[j]
|
|||
|
|
ldr r6,[r3],#4 @ np[j],np++
|
|||
|
|
mov r11,#0
|
|||
|
|
umlal r10,r11,r5,r2 @ ap[j]*bp[i]
|
|||
|
|
mov r14,#0
|
|||
|
|
umlal r12,r14,r6,r8 @ np[j]*n0
|
|||
|
|
adc r11,r11,#0
|
|||
|
|
ldr r7,[r4,#8] @ tp[j+1]
|
|||
|
|
adds r12,r12,r10
|
|||
|
|
str r12,[r4],#4 @ tp[j-1]=,tp++
|
|||
|
|
adc r12,r14,#0
|
|||
|
|
cmp r4,r0
|
|||
|
|
bne .Linner
|
|||
|
|
|
|||
|
|
adds r12,r12,r11
|
|||
|
|
mov r14,#0
|
|||
|
|
ldr r4,[r0,#13*4] @ restore bp
|
|||
|
|
adc r14,r14,#0
|
|||
|
|
ldr r8,[r0,#14*4] @ restore n0
|
|||
|
|
adds r12,r12,r7
|
|||
|
|
ldr r7,[r0,#15*4] @ restore &bp[num]
|
|||
|
|
adc r14,r14,#0
|
|||
|
|
str r12,[r0] @ tp[num-1]=
|
|||
|
|
str r14,[r0,#4] @ tp[num]=
|
|||
|
|
|
|||
|
|
cmp r4,r7
|
|||
|
|
bne .Louter
|
|||
|
|
|
|||
|
|
ldr r2,[r0,#12*4] @ pull rp
|
|||
|
|
add r0,r0,#4 @ r0 to point at &tp[num]
|
|||
|
|
sub r5,r0,sp @ "original" num value
|
|||
|
|
mov r4,sp @ "rewind" r4
|
|||
|
|
mov r1,r4 @ "borrow" r1
|
|||
|
|
sub r3,r3,r5 @ "rewind" r3 to &np[0]
|
|||
|
|
|
|||
|
|
subs r7,r7,r7 @ "clear" carry flag
|
|||
|
|
.Lsub: ldr r7,[r4],#4
|
|||
|
|
ldr r6,[r3],#4
|
|||
|
|
sbcs r7,r7,r6 @ tp[j]-np[j]
|
|||
|
|
str r7,[r2],#4 @ rp[j]=
|
|||
|
|
teq r4,r0 @ preserve carry
|
|||
|
|
bne .Lsub
|
|||
|
|
sbcs r14,r14,#0 @ upmost carry
|
|||
|
|
mov r4,sp @ "rewind" r4
|
|||
|
|
sub r2,r2,r5 @ "rewind" r2
|
|||
|
|
|
|||
|
|
and r1,r4,r14
|
|||
|
|
bic r3,r2,r14
|
|||
|
|
orr r1,r1,r3 @ ap=borrow?tp:rp
|
|||
|
|
|
|||
|
|
.Lcopy: ldr r7,[r1],#4 @ copy or in-place refresh
|
|||
|
|
str sp,[r4],#4 @ zap tp
|
|||
|
|
str r7,[r2],#4
|
|||
|
|
cmp r4,r0
|
|||
|
|
bne .Lcopy
|
|||
|
|
|
|||
|
|
add sp,r0,#4 @ skip over tp[num+1]
|
|||
|
|
ldmia sp!,{r4-r12,lr} @ restore registers
|
|||
|
|
add sp,sp,#2*4 @ skip over {r0,r2}
|
|||
|
|
mov r0,#1
|
|||
|
|
.Labrt: tst lr,#1
|
|||
|
|
moveq pc,lr @ be binary compatible with V4, yet
|
|||
|
|
.word 0xe12fff1e @ interoperable with Thumb ISA:-)
|
|||
|
|
.size bn_mul_mont,.-bn_mul_mont
|
|||
|
|
.asciz "Montgomery multiplication for ARMv4, CRYPTOGAMS by <appro@openssl.org>"
|
|||
|
|
.align 2
|
|||
|
|
#if defined(HAVE_GNU_STACK)
|
|||
|
|
.section .note.GNU-stack,"",%progbits
|
|||
|
|
#endif
|