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openssl/crypto/bn/asm/mips1.s
Ralf S. Engelschall dfeab0689f Import of old SSLeay release: SSLeay 0.9.1b (unreleased)
1998-12-21 11:00:56 +00:00

540 lines
7.8 KiB
ArmAsm
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/* This assember is for R2000/R3000 machines, or higher ones that do
* no want to do any 64 bit arithmatic.
* Make sure that the SSLeay bignum library is compiled with
* THIRTY_TWO_BIT set.
* This must either be compiled with the system CC, or, if you use GNU gas,
* cc -E mips1.s|gas -o mips1.o
*/
.set reorder
.set noat
#define R1 $1
#define CC $2
#define R2 $3
#define R3 $8
#define R4 $9
#define L1 $10
#define L2 $11
#define L3 $12
#define L4 $13
#define H1 $14
#define H2 $15
#define H3 $24
#define H4 $25
#define P1 $4
#define P2 $5
#define P3 $6
#define P4 $7
.align 2
.ent bn_mul_add_words
.globl bn_mul_add_words
.text
bn_mul_add_words:
.frame $sp,0,$31
.mask 0x00000000,0
.fmask 0x00000000,0
#blt P3,4,$lab34
subu R1,P3,4
move CC,$0
bltz R1,$lab34
$lab2:
lw R1,0(P1)
lw L1,0(P2)
lw R2,4(P1)
lw L2,4(P2)
lw R3,8(P1)
lw L3,8(P2)
lw R4,12(P1)
lw L4,12(P2)
multu L1,P4
addu R1,R1,CC
mflo L1
sltu CC,R1,CC
addu R1,R1,L1
mfhi H1
sltu L1,R1,L1
sw R1,0(P1)
addu CC,CC,L1
multu L2,P4
addu CC,H1,CC
mflo L2
addu R2,R2,CC
sltu CC,R2,CC
mfhi H2
addu R2,R2,L2
addu P2,P2,16
sltu L2,R2,L2
sw R2,4(P1)
addu CC,CC,L2
multu L3,P4
addu CC,H2,CC
mflo L3
addu R3,R3,CC
sltu CC,R3,CC
mfhi H3
addu R3,R3,L3
addu P1,P1,16
sltu L3,R3,L3
sw R3,-8(P1)
addu CC,CC,L3
multu L4,P4
addu CC,H3,CC
mflo L4
addu R4,R4,CC
sltu CC,R4,CC
mfhi H4
addu R4,R4,L4
subu P3,P3,4
sltu L4,R4,L4
addu CC,CC,L4
addu CC,H4,CC
subu R1,P3,4
sw R4,-4(P1) # delay slot
bgez R1,$lab2
bleu P3,0,$lab3
.align 2
$lab33:
lw L1,0(P2)
lw R1,0(P1)
multu L1,P4
addu R1,R1,CC
sltu CC,R1,CC
addu P1,P1,4
mflo L1
mfhi H1
addu R1,R1,L1
addu P2,P2,4
sltu L1,R1,L1
subu P3,P3,1
addu CC,CC,L1
sw R1,-4(P1)
addu CC,H1,CC
bgtz P3,$lab33
j $31
.align 2
$lab3:
j $31
.align 2
$lab34:
bgt P3,0,$lab33
j $31
.end bn_mul_add_words
.align 2
# Program Unit: bn_mul_words
.ent bn_mul_words
.globl bn_mul_words
.text
bn_mul_words:
.frame $sp,0,$31
.mask 0x00000000,0
.fmask 0x00000000,0
subu P3,P3,4
move CC,$0
bltz P3,$lab45
$lab44:
lw L1,0(P2)
lw L2,4(P2)
lw L3,8(P2)
lw L4,12(P2)
multu L1,P4
subu P3,P3,4
mflo L1
mfhi H1
addu L1,L1,CC
multu L2,P4
sltu CC,L1,CC
sw L1,0(P1)
addu CC,H1,CC
mflo L2
mfhi H2
addu L2,L2,CC
multu L3,P4
sltu CC,L2,CC
sw L2,4(P1)
addu CC,H2,CC
mflo L3
mfhi H3
addu L3,L3,CC
multu L4,P4
sltu CC,L3,CC
sw L3,8(P1)
addu CC,H3,CC
mflo L4
mfhi H4
addu L4,L4,CC
addu P1,P1,16
sltu CC,L4,CC
addu P2,P2,16
addu CC,H4,CC
sw L4,-4(P1)
bgez P3,$lab44
b $lab45
$lab46:
lw L1,0(P2)
addu P1,P1,4
multu L1,P4
addu P2,P2,4
mflo L1
mfhi H1
addu L1,L1,CC
subu P3,P3,1
sltu CC,L1,CC
sw L1,-4(P1)
addu CC,H1,CC
bgtz P3,$lab46
j $31
$lab45:
addu P3,P3,4
bgtz P3,$lab46
j $31
.align 2
.end bn_mul_words
# Program Unit: bn_sqr_words
.ent bn_sqr_words
.globl bn_sqr_words
.text
bn_sqr_words:
.frame $sp,0,$31
.mask 0x00000000,0
.fmask 0x00000000,0
subu P3,P3,4
bltz P3,$lab55
$lab54:
lw L1,0(P2)
lw L2,4(P2)
lw L3,8(P2)
lw L4,12(P2)
multu L1,L1
subu P3,P3,4
mflo L1
mfhi H1
sw L1,0(P1)
sw H1,4(P1)
multu L2,L2
addu P1,P1,32
mflo L2
mfhi H2
sw L2,-24(P1)
sw H2,-20(P1)
multu L3,L3
addu P2,P2,16
mflo L3
mfhi H3
sw L3,-16(P1)
sw H3,-12(P1)
multu L4,L4
mflo L4
mfhi H4
sw L4,-8(P1)
sw H4,-4(P1)
bgtz P3,$lab54
b $lab55
$lab56:
lw L1,0(P2)
addu P1,P1,8
multu L1,L1
addu P2,P2,4
subu P3,P3,1
mflo L1
mfhi H1
sw L1,-8(P1)
sw H1,-4(P1)
bgtz P3,$lab56
j $31
$lab55:
addu P3,P3,4
bgtz P3,$lab56
j $31
.align 2
.end bn_sqr_words
# Program Unit: bn_add_words
.ent bn_add_words
.globl bn_add_words
.text
bn_add_words: # 0x590
.frame $sp,0,$31
.mask 0x00000000,0
.fmask 0x00000000,0
subu P4,P4,4
move CC,$0
bltz P4,$lab65
$lab64:
lw L1,0(P2)
lw R1,0(P3)
lw L2,4(P2)
lw R2,4(P3)
addu L1,L1,CC
lw L3,8(P2)
sltu CC,L1,CC
addu L1,L1,R1
sltu R1,L1,R1
lw R3,8(P3)
addu CC,CC,R1
lw L4,12(P2)
addu L2,L2,CC
lw R4,12(P3)
sltu CC,L2,CC
addu L2,L2,R2
sltu R2,L2,R2
sw L1,0(P1)
addu CC,CC,R2
addu P1,P1,16
addu L3,L3,CC
sw L2,-12(P1)
sltu CC,L3,CC
addu L3,L3,R3
sltu R3,L3,R3
addu P2,P2,16
addu CC,CC,R3
addu L4,L4,CC
addu P3,P3,16
sltu CC,L4,CC
addu L4,L4,R4
subu P4,P4,4
sltu R4,L4,R4
sw L3,-8(P1)
addu CC,CC,R4
sw L4,-4(P1)
bgtz P4,$lab64
b $lab65
$lab66:
lw L1,0(P2)
lw R1,0(P3)
addu L1,L1,CC
addu P1,P1,4
sltu CC,L1,CC
addu P2,P2,4
addu P3,P3,4
addu L1,L1,R1
subu P4,P4,1
sltu R1,L1,R1
sw L1,-4(P1)
addu CC,CC,R1
bgtz P4,$lab66
j $31
$lab65:
addu P4,P4,4
bgtz P4,$lab66
j $31
.end bn_add_words
# Program Unit: bn_div64
.set at
.set reorder
.text
.align 2
.globl bn_div64
# 321 {
.ent bn_div64 2
bn_div64:
subu $sp, 64
sw $31, 56($sp)
sw $16, 48($sp)
.mask 0x80010000, -56
.frame $sp, 64, $31
move $9, $4
move $12, $5
move $16, $6
# 322 BN_ULONG dh,dl,q,ret=0,th,tl,t;
move $31, $0
# 323 int i,count=2;
li $13, 2
# 324
# 325 if (d == 0) return(BN_MASK2);
bne $16, 0, $80
li $2, -1
b $93
$80:
# 326
# 327 i=BN_num_bits_word(d);
move $4, $16
sw $31, 16($sp)
sw $9, 24($sp)
sw $12, 32($sp)
sw $13, 40($sp)
.livereg 0x800ff0e,0xfff
jal BN_num_bits_word
li $4, 32
lw $31, 16($sp)
lw $9, 24($sp)
lw $12, 32($sp)
lw $13, 40($sp)
move $3, $2
# 328 if ((i != BN_BITS2) && (h > (BN_ULONG)1<<i))
beq $2, $4, $81
li $14, 1
sll $15, $14, $2
bleu $9, $15, $81
# 329 {
# 330 #if !defined(NO_STDIO) && !defined(WIN16)
# 331 fprintf(stderr,"Division would overflow (%d)\n",i);
# 332 #endif
# 333 abort();
sw $3, 8($sp)
sw $9, 24($sp)
sw $12, 32($sp)
sw $13, 40($sp)
sw $31, 26($sp)
.livereg 0xff0e,0xfff
jal abort
lw $3, 8($sp)
li $4, 32
lw $9, 24($sp)
lw $12, 32($sp)
lw $13, 40($sp)
lw $31, 26($sp)
# 334 }
$81:
# 335 i=BN_BITS2-i;
subu $3, $4, $3
# 336 if (h >= d) h-=d;
bltu $9, $16, $82
subu $9, $9, $16
$82:
# 337
# 338 if (i)
beq $3, 0, $83
# 339 {
# 340 d<<=i;
sll $16, $16, $3
# 341 h=(h<<i)|(l>>(BN_BITS2-i));
sll $24, $9, $3
subu $25, $4, $3
srl $14, $12, $25
or $9, $24, $14
# 342 l<<=i;
sll $12, $12, $3
# 343 }
$83:
# 344 dh=(d&BN_MASK2h)>>BN_BITS4;
# 345 dl=(d&BN_MASK2l);
and $8, $16, -65536
srl $8, $8, 16
and $10, $16, 65535
li $6, -65536
$84:
# 346 for (;;)
# 347 {
# 348 if ((h>>BN_BITS4) == dh)
srl $15, $9, 16
bne $8, $15, $85
# 349 q=BN_MASK2l;
li $5, 65535
b $86
$85:
# 350 else
# 351 q=h/dh;
divu $5, $9, $8
$86:
# 352
# 353 for (;;)
# 354 {
# 355 t=(h-q*dh);
mul $4, $5, $8
subu $2, $9, $4
move $3, $2
# 356 if ((t&BN_MASK2h) ||
# 357 ((dl*q) <= (
# 358 (t<<BN_BITS4)+
# 359 ((l&BN_MASK2h)>>BN_BITS4))))
and $25, $2, $6
bne $25, $0, $87
mul $24, $10, $5
sll $14, $3, 16
and $15, $12, $6
srl $25, $15, 16
addu $15, $14, $25
bgtu $24, $15, $88
$87:
# 360 break;
mul $3, $10, $5
b $89
$88:
# 361 q--;
addu $5, $5, -1
# 362 }
b $86
$89:
# 363 th=q*dh;
# 364 tl=q*dl;
# 365 t=(tl>>BN_BITS4);
# 366 tl=(tl<<BN_BITS4)&BN_MASK2h;
sll $14, $3, 16
and $2, $14, $6
move $11, $2
# 367 th+=t;
srl $25, $3, 16
addu $7, $4, $25
# 368
# 369 if (l < tl) th++;
bgeu $12, $2, $90
addu $7, $7, 1
$90:
# 370 l-=tl;
subu $12, $12, $11
# 371 if (h < th)
bgeu $9, $7, $91
# 372 {
# 373 h+=d;
addu $9, $9, $16
# 374 q--;
addu $5, $5, -1
# 375 }
$91:
# 376 h-=th;
subu $9, $9, $7
# 377
# 378 if (--count == 0) break;
addu $13, $13, -1
beq $13, 0, $92
# 379
# 380 ret=q<<BN_BITS4;
sll $31, $5, 16
# 381 h=((h<<BN_BITS4)|(l>>BN_BITS4))&BN_MASK2;
sll $24, $9, 16
srl $15, $12, 16
or $9, $24, $15
# 382 l=(l&BN_MASK2l)<<BN_BITS4;
and $12, $12, 65535
sll $12, $12, 16
# 383 }
b $84
$92:
# 384 ret|=q;
or $31, $31, $5
# 385 return(ret);
move $2, $31
$93:
lw $16, 48($sp)
lw $31, 56($sp)
addu $sp, 64
j $31
.end bn_div64
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