diff options
Diffstat (limited to 'openssl/crypto/sha/asm/sha1-thumb.pl')
| -rw-r--r-- | openssl/crypto/sha/asm/sha1-thumb.pl | 259 |
1 files changed, 259 insertions, 0 deletions
diff --git a/openssl/crypto/sha/asm/sha1-thumb.pl b/openssl/crypto/sha/asm/sha1-thumb.pl new file mode 100644 index 00000000..7c9ea9b0 --- /dev/null +++ b/openssl/crypto/sha/asm/sha1-thumb.pl @@ -0,0 +1,259 @@ +#!/usr/bin/env perl + +# ==================================================================== +# Written by Andy Polyakov <appro@fy.chalmers.se> for the OpenSSL +# project. The module is, however, dual licensed under OpenSSL and +# CRYPTOGAMS licenses depending on where you obtain it. For further +# details see http://www.openssl.org/~appro/cryptogams/. +# ==================================================================== + +# sha1_block for Thumb. +# +# January 2007. +# +# The code does not present direct interest to OpenSSL, because of low +# performance. Its purpose is to establish _size_ benchmark. Pretty +# useless one I must say, because 30% or 88 bytes larger ARMv4 code +# [avialable on demand] is almost _twice_ as fast. It should also be +# noted that in-lining of .Lcommon and .Lrotate improves performance +# by over 40%, while code increases by only 10% or 32 bytes. But once +# again, the goal was to establish _size_ benchmark, not performance. + +$output=shift; +open STDOUT,">$output"; + +$inline=0; +#$cheat_on_binutils=1; + +$t0="r0"; +$t1="r1"; +$t2="r2"; +$a="r3"; +$b="r4"; +$c="r5"; +$d="r6"; +$e="r7"; +$K="r8"; # "upper" registers can be used in add/sub and mov insns +$ctx="r9"; +$inp="r10"; +$len="r11"; +$Xi="r12"; + +sub common { +<<___; + sub $t0,#4 + ldr $t1,[$t0] + add $e,$K @ E+=K_xx_xx + lsl $t2,$a,#5 + add $t2,$e + lsr $e,$a,#27 + add $t2,$e @ E+=ROR(A,27) + add $t2,$t1 @ E+=X[i] +___ +} +sub rotate { +<<___; + mov $e,$d @ E=D + mov $d,$c @ D=C + lsl $c,$b,#30 + lsr $b,$b,#2 + orr $c,$b @ C=ROR(B,2) + mov $b,$a @ B=A + add $a,$t2,$t1 @ A=E+F_xx_xx(B,C,D) +___ +} + +sub BODY_00_19 { +$code.=$inline?&common():"\tbl .Lcommon\n"; +$code.=<<___; + mov $t1,$c + eor $t1,$d + and $t1,$b + eor $t1,$d @ F_00_19(B,C,D) +___ +$code.=$inline?&rotate():"\tbl .Lrotate\n"; +} + +sub BODY_20_39 { +$code.=$inline?&common():"\tbl .Lcommon\n"; +$code.=<<___; + mov $t1,$b + eor $t1,$c + eor $t1,$d @ F_20_39(B,C,D) +___ +$code.=$inline?&rotate():"\tbl .Lrotate\n"; +} + +sub BODY_40_59 { +$code.=$inline?&common():"\tbl .Lcommon\n"; +$code.=<<___; + mov $t1,$b + and $t1,$c + mov $e,$b + orr $e,$c + and $e,$d + orr $t1,$e @ F_40_59(B,C,D) +___ +$code.=$inline?&rotate():"\tbl .Lrotate\n"; +} + +$code=<<___; +.text +.code 16 + +.global sha1_block_data_order +.type sha1_block_data_order,%function + +.align 2 +sha1_block_data_order: +___ +if ($cheat_on_binutils) { +$code.=<<___; +.code 32 + add r3,pc,#1 + bx r3 @ switch to Thumb ISA +.code 16 +___ +} +$code.=<<___; + push {r4-r7} + mov r3,r8 + mov r4,r9 + mov r5,r10 + mov r6,r11 + mov r7,r12 + push {r3-r7,lr} + lsl r2,#6 + mov $ctx,r0 @ save context + mov $inp,r1 @ save inp + mov $len,r2 @ save len + add $len,$inp @ $len to point at inp end + +.Lloop: + mov $Xi,sp + mov $t2,sp + sub $t2,#16*4 @ [3] +.LXload: + ldrb $a,[$t1,#0] @ $t1 is r1 and holds inp + ldrb $b,[$t1,#1] + ldrb $c,[$t1,#2] + ldrb $d,[$t1,#3] + lsl $a,#24 + lsl $b,#16 + lsl $c,#8 + orr $a,$b + orr $a,$c + orr $a,$d + add $t1,#4 + push {$a} + cmp sp,$t2 + bne .LXload @ [+14*16] + + mov $inp,$t1 @ update $inp + sub $t2,#32*4 + sub $t2,#32*4 + mov $e,#31 @ [+4] +.LXupdate: + ldr $a,[sp,#15*4] + ldr $b,[sp,#13*4] + ldr $c,[sp,#7*4] + ldr $d,[sp,#2*4] + eor $a,$b + eor $a,$c + eor $a,$d + ror $a,$e + push {$a} + cmp sp,$t2 + bne .LXupdate @ [+(11+1)*64] + + ldmia $t0!,{$a,$b,$c,$d,$e} @ $t0 is r0 and holds ctx + mov $t0,$Xi + + ldr $t2,.LK_00_19 + mov $t1,$t0 + sub $t1,#20*4 + mov $Xi,$t1 + mov $K,$t2 @ [+7+4] +.L_00_19: +___ + &BODY_00_19(); +$code.=<<___; + cmp $Xi,$t0 + bne .L_00_19 @ [+(2+9+4+2+8+2)*20] + + ldr $t2,.LK_20_39 + mov $t1,$t0 + sub $t1,#20*4 + mov $Xi,$t1 + mov $K,$t2 @ [+5] +.L_20_39_or_60_79: +___ + &BODY_20_39(); +$code.=<<___; + cmp $Xi,$t0 + bne .L_20_39_or_60_79 @ [+(2+9+3+2+8+2)*20*2] + cmp sp,$t0 + beq .Ldone @ [+2] + + ldr $t2,.LK_40_59 + mov $t1,$t0 + sub $t1,#20*4 + mov $Xi,$t1 + mov $K,$t2 @ [+5] +.L_40_59: +___ + &BODY_40_59(); +$code.=<<___; + cmp $Xi,$t0 + bne .L_40_59 @ [+(2+9+6+2+8+2)*20] + + ldr $t2,.LK_60_79 + mov $Xi,sp + mov $K,$t2 + b .L_20_39_or_60_79 @ [+4] +.Ldone: + mov $t0,$ctx + ldr $t1,[$t0,#0] + ldr $t2,[$t0,#4] + add $a,$t1 + ldr $t1,[$t0,#8] + add $b,$t2 + ldr $t2,[$t0,#12] + add $c,$t1 + ldr $t1,[$t0,#16] + add $d,$t2 + add $e,$t1 + stmia $t0!,{$a,$b,$c,$d,$e} @ [+20] + + add sp,#80*4 @ deallocate stack frame + mov $t0,$ctx @ restore ctx + mov $t1,$inp @ restore inp + cmp $t1,$len + beq .Lexit + b .Lloop @ [+6] total 3212 cycles +.Lexit: + pop {r2-r7} + mov r8,r2 + mov r9,r3 + mov r10,r4 + mov r11,r5 + mov r12,r6 + mov lr,r7 + pop {r4-r7} + bx lr +.align 2 +___ +$code.=".Lcommon:\n".&common()."\tmov pc,lr\n" if (!$inline); +$code.=".Lrotate:\n".&rotate()."\tmov pc,lr\n" if (!$inline); +$code.=<<___; +.align 2 +.LK_00_19: .word 0x5a827999 +.LK_20_39: .word 0x6ed9eba1 +.LK_40_59: .word 0x8f1bbcdc +.LK_60_79: .word 0xca62c1d6 +.size sha1_block_data_order,.-sha1_block_data_order +.asciz "SHA1 block transform for Thumb, CRYPTOGAMS by <appro\@openssl.org>" +___ + +print $code; +close STDOUT; # enforce flush |