From: Andy Polyakov Date: Wed, 4 Dec 2013 21:37:49 +0000 (+0100) Subject: bn/asm/armv4-mont.pl: add NEON code path. X-Git-Tag: master-post-reformat~1054 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=d1671f4f1a39d938499c67efe5d4a14c34c09b31;p=oweals%2Fopenssl.git bn/asm/armv4-mont.pl: add NEON code path. --- diff --git a/crypto/bn/asm/armv4-mont.pl b/crypto/bn/asm/armv4-mont.pl index f78a8b5f0f..fe81f9b6f6 100644 --- a/crypto/bn/asm/armv4-mont.pl +++ b/crypto/bn/asm/armv4-mont.pl @@ -1,7 +1,7 @@ #!/usr/bin/env perl # ==================================================================== -# Written by Andy Polyakov for the OpenSSL +# Written by Andy Polyakov 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/. @@ -23,6 +23,21 @@ # than 1/2KB. Windows CE port would be trivial, as it's exclusively # about decorations, ABI and instruction syntax are identical. +# November 2013 +# +# Add NEON code path, which handles lengths divisible by 8. RSA/DSA +# performance improvement on Cortex-A8 is ~45-100% depending on key +# length, more for longer keys. On Cortex-A15 the span is ~10-105%. +# On Snapdragon S4 improvement was measured to vary from ~70% to +# incredible ~380%, yes, 4.8x faster, for RSA4096 sign. But this is +# rather because original integer-only code seems to perform +# suboptimally on S4. Situation on Cortex-A9 is unfortunately +# different. It's being looked into, but the trouble is that +# performance for vectors longer than 256 bits is actually couple +# of percent worse than for integer-only code. The code is chosen +# for execution on all NEON-capable processors, because gain on +# others outweighs the marginal loss on Cortex-A9. + while (($output=shift) && ($output!~/^\w[\w\-]*\.\w+$/)) {} open STDOUT,">$output"; @@ -52,16 +67,40 @@ $_n0="$num,#14*4"; $_num="$num,#15*4"; $_bpend=$_num; $code=<<___; +#include "arm_arch.h" + .text +.code 32 + +#if __ARM_ARCH__>=7 +.align 5 +.LOPENSSL_armcap: +.word OPENSSL_armcap_P-bn_mul_mont +#endif .global bn_mul_mont .type bn_mul_mont,%function -.align 2 +.align 5 bn_mul_mont: + ldr ip,[sp,#4] @ load num stmdb sp!,{r0,r2} @ sp points at argument block - ldr $num,[sp,#3*4] @ load num - cmp $num,#2 +#if __ARM_ARCH__>=7 + tst ip,#7 + bne .Lialu + adr r0,bn_mul_mont + ldr r2,.LOPENSSL_armcap + ldr r0,[r0,r2] + tst r0,#1 @ NEON available? + ldmia sp, {r0,r2} + beq .Lialu + add sp,sp,#8 + b bn_mul8x_mont_neon +.align 4 +.Lialu: +#endif + cmp ip,#2 + mov $num,ip @ load num movlt r0,#0 addlt sp,sp,#2*4 blt .Labrt @@ -195,10 +234,436 @@ bn_mul_mont: moveq pc,lr @ be binary compatible with V4, yet bx lr @ interoperable with Thumb ISA:-) .size bn_mul_mont,.-bn_mul_mont -.asciz "Montgomery multiplication for ARMv4, CRYPTOGAMS by " +___ +{ +sub Dlo() { shift=~m|q([1]?[0-9])|?"d".($1*2):""; } +sub Dhi() { shift=~m|q([1]?[0-9])|?"d".($1*2+1):""; } + +my ($A0,$A1,$A2,$A3)=map("d$_",(0..3)); +my ($N0,$N1,$N2,$N3)=map("d$_",(4..7)); +my ($Z,$Temp)=("q4","q5"); +my ($A0xB,$A1xB,$A2xB,$A3xB,$A4xB,$A5xB,$A6xB,$A7xB)=map("q$_",(6..13)); +my ($Bi,$Ni,$M0)=map("d$_",(28..31)); +my $zero=&Dlo($Z); +my $temp=&Dlo($Temp); + +my ($rptr,$aptr,$bptr,$nptr,$n0,$num)=map("r$_",(0..5)); +my ($tinptr,$toutptr,$inner,$outer)=map("r$_",(6..9)); + +$code.=<<___; +#if __ARM_ARCH__>=7 +.fpu neon + +.type bn_mul8x_mont_neon,%function +.align 5 +bn_mul8x_mont_neon: + mov ip,sp + stmdb sp!,{r4-r11} + vstmdb sp!,{d8-d15} @ ABI specification says so + ldmia ip,{r4-r5} @ load rest of parameter block + + sub $toutptr,sp,#16 + vld1.32 {${Bi}[0]}, [$bptr,:32]! + sub $toutptr,$toutptr,$num,lsl#4 + vld1.32 {$A0-$A3}, [$aptr]! @ can't specify :32 :-( + and $toutptr,$toutptr,#-64 + vld1.32 {${M0}[0]}, [$n0,:32] + mov sp,$toutptr @ alloca + veor $zero,$zero,$zero + subs $inner,$num,#8 + vzip.16 $Bi,$zero + + vmull.u32 $A0xB,$Bi,${A0}[0] + vmull.u32 $A1xB,$Bi,${A0}[1] + vmull.u32 $A2xB,$Bi,${A1}[0] + vshl.i64 $temp,`&Dhi("$A0xB")`,#16 + vmull.u32 $A3xB,$Bi,${A1}[1] + + vadd.u64 $temp,$temp,`&Dlo("$A0xB")` + veor $zero,$zero,$zero + vmul.u32 $Ni,$temp,$M0 + + vmull.u32 $A4xB,$Bi,${A2}[0] + vld1.32 {$N0-$N3}, [$nptr]! + vmull.u32 $A5xB,$Bi,${A2}[1] + vmull.u32 $A6xB,$Bi,${A3}[0] + vzip.16 $Ni,$zero + vmull.u32 $A7xB,$Bi,${A3}[1] + + bne .LNEON_1st + + @ special case for num=8, everything is in register bank... + + vmlal.u32 $A0xB,$Ni,${N0}[0] + sub $outer,$num,#1 + vmlal.u32 $A1xB,$Ni,${N0}[1] + vmlal.u32 $A2xB,$Ni,${N1}[0] + vmlal.u32 $A3xB,$Ni,${N1}[1] + + vmlal.u32 $A4xB,$Ni,${N2}[0] + vmov $Temp,$A0xB + vmlal.u32 $A5xB,$Ni,${N2}[1] + vmov $A0xB,$A1xB + vmlal.u32 $A6xB,$Ni,${N3}[0] + vmov $A1xB,$A2xB + vmlal.u32 $A7xB,$Ni,${N3}[1] + vmov $A2xB,$A3xB + vmov $A3xB,$A4xB + vshr.u64 $temp,$temp,#16 + vmov $A4xB,$A5xB + vmov $A5xB,$A6xB + vadd.u64 $temp,$temp,`&Dhi("$Temp")` + vmov $A6xB,$A7xB + veor $A7xB,$A7xB + vshr.u64 $temp,$temp,#16 + + b .LNEON_outer8 + +.align 4 +.LNEON_outer8: + vld1.32 {${Bi}[0]}, [$bptr,:32]! + veor $zero,$zero,$zero + vzip.16 $Bi,$zero + vadd.u64 `&Dlo("$A0xB")`,`&Dlo("$A0xB")`,$temp + + vmlal.u32 $A0xB,$Bi,${A0}[0] + vmlal.u32 $A1xB,$Bi,${A0}[1] + vmlal.u32 $A2xB,$Bi,${A1}[0] + vshl.i64 $temp,`&Dhi("$A0xB")`,#16 + vmlal.u32 $A3xB,$Bi,${A1}[1] + + vadd.u64 $temp,$temp,`&Dlo("$A0xB")` + veor $zero,$zero,$zero + subs $outer,$outer,#1 + vmul.u32 $Ni,$temp,$M0 + + vmlal.u32 $A4xB,$Bi,${A2}[0] + vmlal.u32 $A5xB,$Bi,${A2}[1] + vmlal.u32 $A6xB,$Bi,${A3}[0] + vzip.16 $Ni,$zero + vmlal.u32 $A7xB,$Bi,${A3}[1] + + vmlal.u32 $A0xB,$Ni,${N0}[0] + vmlal.u32 $A1xB,$Ni,${N0}[1] + vmlal.u32 $A2xB,$Ni,${N1}[0] + vmlal.u32 $A3xB,$Ni,${N1}[1] + + vmlal.u32 $A4xB,$Ni,${N2}[0] + vmov $Temp,$A0xB + vmlal.u32 $A5xB,$Ni,${N2}[1] + vmov $A0xB,$A1xB + vmlal.u32 $A6xB,$Ni,${N3}[0] + vmov $A1xB,$A2xB + vmlal.u32 $A7xB,$Ni,${N3}[1] + vmov $A2xB,$A3xB + vmov $A3xB,$A4xB + vshr.u64 $temp,$temp,#16 + vmov $A4xB,$A5xB + vmov $A5xB,$A6xB + vadd.u64 $temp,$temp,`&Dhi("$Temp")` + vmov $A6xB,$A7xB + veor $A7xB,$A7xB + vshr.u64 $temp,$temp,#16 + + bne .LNEON_outer8 + + vadd.u64 `&Dlo("$A0xB")`,`&Dlo("$A0xB")`,$temp + mov $toutptr,sp + vshr.u64 $temp,`&Dlo("$A0xB")`,#16 + mov $inner,$num + vadd.u64 `&Dhi("$A0xB")`,`&Dhi("$A0xB")`,$temp + add $tinptr,sp,#16 + vshr.u64 $temp,`&Dhi("$A0xB")`,#16 + vzip.16 `&Dlo("$A0xB")`,`&Dhi("$A0xB")` + + b .LNEON_tail2 + +.align 4 +.LNEON_1st: + vmlal.u32 $A0xB,$Ni,${N0}[0] + vld1.32 {$A0-$A3}, [$aptr]! + vmlal.u32 $A1xB,$Ni,${N0}[1] + subs $inner,$inner,#8 + vmlal.u32 $A2xB,$Ni,${N1}[0] + vmlal.u32 $A3xB,$Ni,${N1}[1] + + vmlal.u32 $A4xB,$Ni,${N2}[0] + vld1.32 {$N0-$N1}, [$nptr]! + vmlal.u32 $A5xB,$Ni,${N2}[1] + vst1.64 {$A0xB-$A1xB}, [$toutptr,:256]! + vmlal.u32 $A6xB,$Ni,${N3}[0] + vmlal.u32 $A7xB,$Ni,${N3}[1] + vst1.64 {$A2xB-$A3xB}, [$toutptr,:256]! + + vmull.u32 $A0xB,$Bi,${A0}[0] + vld1.32 {$N2-$N3}, [$nptr]! + vmull.u32 $A1xB,$Bi,${A0}[1] + vst1.64 {$A4xB-$A5xB}, [$toutptr,:256]! + vmull.u32 $A2xB,$Bi,${A1}[0] + vmull.u32 $A3xB,$Bi,${A1}[1] + vst1.64 {$A6xB-$A7xB}, [$toutptr,:256]! + + vmull.u32 $A4xB,$Bi,${A2}[0] + vmull.u32 $A5xB,$Bi,${A2}[1] + vmull.u32 $A6xB,$Bi,${A3}[0] + vmull.u32 $A7xB,$Bi,${A3}[1] + + bne .LNEON_1st + + vmlal.u32 $A0xB,$Ni,${N0}[0] + add $tinptr,sp,#16 + vmlal.u32 $A1xB,$Ni,${N0}[1] + sub $aptr,$aptr,$num,lsl#2 @ rewind $aptr + vmlal.u32 $A2xB,$Ni,${N1}[0] + vld1.64 {$Temp}, [sp,:128] + vmlal.u32 $A3xB,$Ni,${N1}[1] + sub $outer,$num,#1 + + vmlal.u32 $A4xB,$Ni,${N2}[0] + vst1.64 {$A0xB-$A1xB}, [$toutptr,:256]! + vmlal.u32 $A5xB,$Ni,${N2}[1] + vshr.u64 $temp,$temp,#16 + vld1.64 {$A0xB}, [$tinptr, :128]! + vmlal.u32 $A6xB,$Ni,${N3}[0] + vst1.64 {$A2xB-$A3xB}, [$toutptr,:256]! + vmlal.u32 $A7xB,$Ni,${N3}[1] + + vst1.64 {$A4xB-$A5xB}, [$toutptr,:256]! + vadd.u64 $temp,$temp,`&Dhi("$Temp")` + veor $Z,$Z,$Z + vst1.64 {$A6xB-$A7xB}, [$toutptr,:256]! + vld1.64 {$A1xB-$A2xB}, [$tinptr, :256]! + vst1.64 {$Z}, [$toutptr,:128] + vshr.u64 $temp,$temp,#16 + + b .LNEON_outer + +.align 4 +.LNEON_outer: + vld1.32 {${Bi}[0]}, [$bptr,:32]! + sub $nptr,$nptr,$num,lsl#2 @ rewind $nptr + vld1.32 {$A0-$A3}, [$aptr]! + veor $zero,$zero,$zero + mov $toutptr,sp + vzip.16 $Bi,$zero + sub $inner,$num,#8 + vadd.u64 `&Dlo("$A0xB")`,`&Dlo("$A0xB")`,$temp + + vmlal.u32 $A0xB,$Bi,${A0}[0] + vld1.64 {$A3xB-$A4xB},[$tinptr,:256]! + vmlal.u32 $A1xB,$Bi,${A0}[1] + vmlal.u32 $A2xB,$Bi,${A1}[0] + vld1.64 {$A5xB-$A6xB},[$tinptr,:256]! + vmlal.u32 $A3xB,$Bi,${A1}[1] + + vshl.i64 $temp,`&Dhi("$A0xB")`,#16 + veor $zero,$zero,$zero + vadd.u64 $temp,$temp,`&Dlo("$A0xB")` + vld1.64 {$A7xB},[$tinptr,:128]! + vmul.u32 $Ni,$temp,$M0 + + vmlal.u32 $A4xB,$Bi,${A2}[0] + vld1.32 {$N0-$N3}, [$nptr]! + vmlal.u32 $A5xB,$Bi,${A2}[1] + vmlal.u32 $A6xB,$Bi,${A3}[0] + vzip.16 $Ni,$zero + vmlal.u32 $A7xB,$Bi,${A3}[1] + +.LNEON_inner: + vmlal.u32 $A0xB,$Ni,${N0}[0] + vld1.32 {$A0-$A3}, [$aptr]! + vmlal.u32 $A1xB,$Ni,${N0}[1] + subs $inner,$inner,#8 + vmlal.u32 $A2xB,$Ni,${N1}[0] + vmlal.u32 $A3xB,$Ni,${N1}[1] + vst1.64 {$A0xB-$A1xB}, [$toutptr,:256]! + + vmlal.u32 $A4xB,$Ni,${N2}[0] + vld1.64 {$A0xB}, [$tinptr, :128]! + vmlal.u32 $A5xB,$Ni,${N2}[1] + vst1.64 {$A2xB-$A3xB}, [$toutptr,:256]! + vmlal.u32 $A6xB,$Ni,${N3}[0] + vld1.64 {$A1xB-$A2xB}, [$tinptr, :256]! + vmlal.u32 $A7xB,$Ni,${N3}[1] + vst1.64 {$A4xB-$A5xB}, [$toutptr,:256]! + + vmlal.u32 $A0xB,$Bi,${A0}[0] + vld1.64 {$A3xB-$A4xB}, [$tinptr, :256]! + vmlal.u32 $A1xB,$Bi,${A0}[1] + vst1.64 {$A6xB-$A7xB}, [$toutptr,:256]! + vmlal.u32 $A2xB,$Bi,${A1}[0] + vld1.64 {$A5xB-$A6xB}, [$tinptr, :256]! + vmlal.u32 $A3xB,$Bi,${A1}[1] + vld1.32 {$N0-$N3}, [$nptr]! + + vmlal.u32 $A4xB,$Bi,${A2}[0] + vld1.64 {$A7xB}, [$tinptr, :128]! + vmlal.u32 $A5xB,$Bi,${A2}[1] + vmlal.u32 $A6xB,$Bi,${A3}[0] + vmlal.u32 $A7xB,$Bi,${A3}[1] + + bne .LNEON_inner + + vmlal.u32 $A0xB,$Ni,${N0}[0] + add $tinptr,sp,#16 + vmlal.u32 $A1xB,$Ni,${N0}[1] + sub $aptr,$aptr,$num,lsl#2 @ rewind $aptr + vmlal.u32 $A2xB,$Ni,${N1}[0] + vld1.64 {$Temp}, [sp,:128] + vmlal.u32 $A3xB,$Ni,${N1}[1] + subs $outer,$outer,#1 + + vmlal.u32 $A4xB,$Ni,${N2}[0] + vst1.64 {$A0xB-$A1xB}, [$toutptr,:256]! + vmlal.u32 $A5xB,$Ni,${N2}[1] + vld1.64 {$A0xB}, [$tinptr, :128]! + vshr.u64 $temp,$temp,#16 + vst1.64 {$A2xB-$A3xB}, [$toutptr,:256]! + vmlal.u32 $A6xB,$Ni,${N3}[0] + vld1.64 {$A1xB-$A2xB}, [$tinptr, :256]! + vmlal.u32 $A7xB,$Ni,${N3}[1] + + vst1.64 {$A4xB-$A5xB}, [$toutptr,:256]! + vadd.u64 $temp,$temp,`&Dhi("$Temp")` + vst1.64 {$A6xB-$A7xB}, [$toutptr,:256]! + vshr.u64 $temp,$temp,#16 + + bne .LNEON_outer + + mov $toutptr,sp + mov $inner,$num + +.LNEON_tail: + vadd.u64 `&Dlo("$A0xB")`,`&Dlo("$A0xB")`,$temp + vld1.64 {$A3xB-$A4xB}, [$tinptr, :256]! + vshr.u64 $temp,`&Dlo("$A0xB")`,#16 + vadd.u64 `&Dhi("$A0xB")`,`&Dhi("$A0xB")`,$temp + vld1.64 {$A5xB-$A6xB}, [$tinptr, :256]! + vshr.u64 $temp,`&Dhi("$A0xB")`,#16 + vld1.64 {$A7xB}, [$tinptr, :128]! + vzip.16 `&Dlo("$A0xB")`,`&Dhi("$A0xB")` + +.LNEON_tail2: + vadd.u64 `&Dlo("$A1xB")`,`&Dlo("$A1xB")`,$temp + vst1.32 {`&Dlo("$A0xB")`[0]}, [$toutptr, :32]! + vshr.u64 $temp,`&Dlo("$A1xB")`,#16 + vadd.u64 `&Dhi("$A1xB")`,`&Dhi("$A1xB")`,$temp + vshr.u64 $temp,`&Dhi("$A1xB")`,#16 + vzip.16 `&Dlo("$A1xB")`,`&Dhi("$A1xB")` + + vadd.u64 `&Dlo("$A2xB")`,`&Dlo("$A2xB")`,$temp + vst1.32 {`&Dlo("$A1xB")`[0]}, [$toutptr, :32]! + vshr.u64 $temp,`&Dlo("$A2xB")`,#16 + vadd.u64 `&Dhi("$A2xB")`,`&Dhi("$A2xB")`,$temp + vshr.u64 $temp,`&Dhi("$A2xB")`,#16 + vzip.16 `&Dlo("$A2xB")`,`&Dhi("$A2xB")` + + vadd.u64 `&Dlo("$A3xB")`,`&Dlo("$A3xB")`,$temp + vst1.32 {`&Dlo("$A2xB")`[0]}, [$toutptr, :32]! + vshr.u64 $temp,`&Dlo("$A3xB")`,#16 + vadd.u64 `&Dhi("$A3xB")`,`&Dhi("$A3xB")`,$temp + vshr.u64 $temp,`&Dhi("$A3xB")`,#16 + vzip.16 `&Dlo("$A3xB")`,`&Dhi("$A3xB")` + + vadd.u64 `&Dlo("$A4xB")`,`&Dlo("$A4xB")`,$temp + vst1.32 {`&Dlo("$A3xB")`[0]}, [$toutptr, :32]! + vshr.u64 $temp,`&Dlo("$A4xB")`,#16 + vadd.u64 `&Dhi("$A4xB")`,`&Dhi("$A4xB")`,$temp + vshr.u64 $temp,`&Dhi("$A4xB")`,#16 + vzip.16 `&Dlo("$A4xB")`,`&Dhi("$A4xB")` + + vadd.u64 `&Dlo("$A5xB")`,`&Dlo("$A5xB")`,$temp + vst1.32 {`&Dlo("$A4xB")`[0]}, [$toutptr, :32]! + vshr.u64 $temp,`&Dlo("$A5xB")`,#16 + vadd.u64 `&Dhi("$A5xB")`,`&Dhi("$A5xB")`,$temp + vshr.u64 $temp,`&Dhi("$A5xB")`,#16 + vzip.16 `&Dlo("$A5xB")`,`&Dhi("$A5xB")` + + vadd.u64 `&Dlo("$A6xB")`,`&Dlo("$A6xB")`,$temp + vst1.32 {`&Dlo("$A5xB")`[0]}, [$toutptr, :32]! + vshr.u64 $temp,`&Dlo("$A6xB")`,#16 + vadd.u64 `&Dhi("$A6xB")`,`&Dhi("$A6xB")`,$temp + vld1.64 {$A0xB}, [$tinptr, :128]! + vshr.u64 $temp,`&Dhi("$A6xB")`,#16 + vzip.16 `&Dlo("$A6xB")`,`&Dhi("$A6xB")` + + vadd.u64 `&Dlo("$A7xB")`,`&Dlo("$A7xB")`,$temp + vst1.32 {`&Dlo("$A6xB")`[0]}, [$toutptr, :32]! + vshr.u64 $temp,`&Dlo("$A7xB")`,#16 + vadd.u64 `&Dhi("$A7xB")`,`&Dhi("$A7xB")`,$temp + vld1.64 {$A1xB-$A2xB}, [$tinptr, :256]! + vshr.u64 $temp,`&Dhi("$A7xB")`,#16 + vzip.16 `&Dlo("$A7xB")`,`&Dhi("$A7xB")` + subs $inner,$inner,#8 + vst1.32 {`&Dlo("$A7xB")`[0]}, [$toutptr, :32]! + + bne .LNEON_tail + + vst1.32 {${temp}[0]}, [$toutptr, :32] @ top-most bit + sub $nptr,$nptr,$num,lsl#2 @ rewind $nptr + subs $aptr,sp,#0 @ clear carry flag + add $bptr,sp,$num,lsl#2 + +.LNEON_sub: + ldmia $aptr!, {r4-r7} + ldmia $nptr!, {r8-r11} + sbcs r8, r4,r8 + sbcs r9, r5,r9 + sbcs r10,r6,r10 + sbcs r11,r7,r11 + teq $aptr,$bptr @ preserves carry + stmia $rptr!, {r8-r11} + bne .LNEON_sub + + ldr r10, [$aptr] @ load top-most bit + veor q0,q0,q0 + sub r11,$bptr,sp @ this is num*4 + veor q1,q1,q1 + mov $aptr,sp + sub $rptr,$rptr,r11 @ rewind $rptr + mov $nptr,$bptr @ second 3/4th of frame + sbcs r10,r10,#0 @ result is carry flag + +.LNEON_copy_n_zap: + ldmia $aptr!, {r4-r7} + ldmia $rptr, {r8-r11} + movcc r8, r4 + vst1.64 {q0-q1}, [$nptr,:256]! @ wipe + movcc r9, r5 + movcc r10,r6 + vst1.64 {q0-q1}, [$nptr,:256]! @ wipe + movcc r11,r7 + ldmia $aptr, {r4-r7} + stmia $rptr!, {r8-r11} + sub $aptr,$aptr,#16 + ldmia $rptr, {r8-r11} + movcc r8, r4 + vst1.64 {q0-q1}, [$aptr,:256]! @ wipe + movcc r9, r5 + movcc r10,r6 + vst1.64 {q0-q1}, [$nptr,:256]! @ wipe + movcc r11,r7 + teq $aptr,$bptr @ preserves carry + stmia $rptr!, {r8-r11} + bne .LNEON_copy_n_zap + + sub sp,ip,#96 + vldmia sp!,{d8-d15} + ldmia sp!,{r4-r11} + bx lr +.size bn_mul8x_mont_neon,.-bn_mul8x_mont_neon +#endif +___ +} +$code.=<<___; +.asciz "Montgomery multiplication for ARMv4/NEON, CRYPTOGAMS by " .align 2 +#if __ARM_ARCH__>=7 +.comm OPENSSL_armcap_P,4,4 +#endif ___ +$code =~ s/\`([^\`]*)\`/eval $1/gem; $code =~ s/\bbx\s+lr\b/.word\t0xe12fff1e/gm; # make it possible to compile with -march=armv4 print $code; close STDOUT;