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Diffstat (limited to 'openssl/crypto/bn/asm/armv4-gf2m.pl')
| -rw-r--r-- | openssl/crypto/bn/asm/armv4-gf2m.pl | 278 |
1 files changed, 278 insertions, 0 deletions
diff --git a/openssl/crypto/bn/asm/armv4-gf2m.pl b/openssl/crypto/bn/asm/armv4-gf2m.pl new file mode 100644 index 000000000..c52e0b75b --- /dev/null +++ b/openssl/crypto/bn/asm/armv4-gf2m.pl @@ -0,0 +1,278 @@ +#!/usr/bin/env perl +# +# ==================================================================== +# Written by Andy Polyakov <appro@openssl.org> 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/. +# ==================================================================== +# +# May 2011 +# +# The module implements bn_GF2m_mul_2x2 polynomial multiplication +# used in bn_gf2m.c. It's kind of low-hanging mechanical port from +# C for the time being... Except that it has two code paths: pure +# integer code suitable for any ARMv4 and later CPU and NEON code +# suitable for ARMv7. Pure integer 1x1 multiplication subroutine runs +# in ~45 cycles on dual-issue core such as Cortex A8, which is ~50% +# faster than compiler-generated code. For ECDH and ECDSA verify (but +# not for ECDSA sign) it means 25%-45% improvement depending on key +# length, more for longer keys. Even though NEON 1x1 multiplication +# runs in even less cycles, ~30, improvement is measurable only on +# longer keys. One has to optimize code elsewhere to get NEON glow... + +while (($output=shift) && ($output!~/^\w[\w\-]*\.\w+$/)) {} +open STDOUT,">$output"; + +sub Dlo() { shift=~m|q([1]?[0-9])|?"d".($1*2):""; } +sub Dhi() { shift=~m|q([1]?[0-9])|?"d".($1*2+1):""; } +sub Q() { shift=~m|d([1-3]?[02468])|?"q".($1/2):""; } + +$code=<<___; +#include "arm_arch.h" + +.text +.code 32 + +#if __ARM_ARCH__>=7 +.fpu neon + +.type mul_1x1_neon,%function +.align 5 +mul_1x1_neon: + vshl.u64 `&Dlo("q1")`,d16,#8 @ q1-q3 are slided $a + vmull.p8 `&Q("d0")`,d16,d17 @ a·bb + vshl.u64 `&Dlo("q2")`,d16,#16 + vmull.p8 q1,`&Dlo("q1")`,d17 @ a<<8·bb + vshl.u64 `&Dlo("q3")`,d16,#24 + vmull.p8 q2,`&Dlo("q2")`,d17 @ a<<16·bb + vshr.u64 `&Dlo("q1")`,#8 + vmull.p8 q3,`&Dlo("q3")`,d17 @ a<<24·bb + vshl.u64 `&Dhi("q1")`,#24 + veor d0,`&Dlo("q1")` + vshr.u64 `&Dlo("q2")`,#16 + veor d0,`&Dhi("q1")` + vshl.u64 `&Dhi("q2")`,#16 + veor d0,`&Dlo("q2")` + vshr.u64 `&Dlo("q3")`,#24 + veor d0,`&Dhi("q2")` + vshl.u64 `&Dhi("q3")`,#8 + veor d0,`&Dlo("q3")` + veor d0,`&Dhi("q3")` + bx lr +.size mul_1x1_neon,.-mul_1x1_neon +#endif +___ +################ +# private interface to mul_1x1_ialu +# +$a="r1"; +$b="r0"; + +($a0,$a1,$a2,$a12,$a4,$a14)= +($hi,$lo,$t0,$t1, $i0,$i1 )=map("r$_",(4..9),12); + +$mask="r12"; + +$code.=<<___; +.type mul_1x1_ialu,%function +.align 5 +mul_1x1_ialu: + mov $a0,#0 + bic $a1,$a,#3<<30 @ a1=a&0x3fffffff + str $a0,[sp,#0] @ tab[0]=0 + add $a2,$a1,$a1 @ a2=a1<<1 + str $a1,[sp,#4] @ tab[1]=a1 + eor $a12,$a1,$a2 @ a1^a2 + str $a2,[sp,#8] @ tab[2]=a2 + mov $a4,$a1,lsl#2 @ a4=a1<<2 + str $a12,[sp,#12] @ tab[3]=a1^a2 + eor $a14,$a1,$a4 @ a1^a4 + str $a4,[sp,#16] @ tab[4]=a4 + eor $a0,$a2,$a4 @ a2^a4 + str $a14,[sp,#20] @ tab[5]=a1^a4 + eor $a12,$a12,$a4 @ a1^a2^a4 + str $a0,[sp,#24] @ tab[6]=a2^a4 + and $i0,$mask,$b,lsl#2 + str $a12,[sp,#28] @ tab[7]=a1^a2^a4 + + and $i1,$mask,$b,lsr#1 + ldr $lo,[sp,$i0] @ tab[b & 0x7] + and $i0,$mask,$b,lsr#4 + ldr $t1,[sp,$i1] @ tab[b >> 3 & 0x7] + and $i1,$mask,$b,lsr#7 + ldr $t0,[sp,$i0] @ tab[b >> 6 & 0x7] + eor $lo,$lo,$t1,lsl#3 @ stall + mov $hi,$t1,lsr#29 + ldr $t1,[sp,$i1] @ tab[b >> 9 & 0x7] + + and $i0,$mask,$b,lsr#10 + eor $lo,$lo,$t0,lsl#6 + eor $hi,$hi,$t0,lsr#26 + ldr $t0,[sp,$i0] @ tab[b >> 12 & 0x7] + + and $i1,$mask,$b,lsr#13 + eor $lo,$lo,$t1,lsl#9 + eor $hi,$hi,$t1,lsr#23 + ldr $t1,[sp,$i1] @ tab[b >> 15 & 0x7] + + and $i0,$mask,$b,lsr#16 + eor $lo,$lo,$t0,lsl#12 + eor $hi,$hi,$t0,lsr#20 + ldr $t0,[sp,$i0] @ tab[b >> 18 & 0x7] + + and $i1,$mask,$b,lsr#19 + eor $lo,$lo,$t1,lsl#15 + eor $hi,$hi,$t1,lsr#17 + ldr $t1,[sp,$i1] @ tab[b >> 21 & 0x7] + + and $i0,$mask,$b,lsr#22 + eor $lo,$lo,$t0,lsl#18 + eor $hi,$hi,$t0,lsr#14 + ldr $t0,[sp,$i0] @ tab[b >> 24 & 0x7] + + and $i1,$mask,$b,lsr#25 + eor $lo,$lo,$t1,lsl#21 + eor $hi,$hi,$t1,lsr#11 + ldr $t1,[sp,$i1] @ tab[b >> 27 & 0x7] + + tst $a,#1<<30 + and $i0,$mask,$b,lsr#28 + eor $lo,$lo,$t0,lsl#24 + eor $hi,$hi,$t0,lsr#8 + ldr $t0,[sp,$i0] @ tab[b >> 30 ] + + eorne $lo,$lo,$b,lsl#30 + eorne $hi,$hi,$b,lsr#2 + tst $a,#1<<31 + eor $lo,$lo,$t1,lsl#27 + eor $hi,$hi,$t1,lsr#5 + eorne $lo,$lo,$b,lsl#31 + eorne $hi,$hi,$b,lsr#1 + eor $lo,$lo,$t0,lsl#30 + eor $hi,$hi,$t0,lsr#2 + + mov pc,lr +.size mul_1x1_ialu,.-mul_1x1_ialu +___ +################ +# void bn_GF2m_mul_2x2(BN_ULONG *r, +# BN_ULONG a1,BN_ULONG a0, +# BN_ULONG b1,BN_ULONG b0); # r[3..0]=a1a0·b1b0 + +($A1,$B1,$A0,$B0,$A1B1,$A0B0)=map("d$_",(18..23)); + +$code.=<<___; +.global bn_GF2m_mul_2x2 +.type bn_GF2m_mul_2x2,%function +.align 5 +bn_GF2m_mul_2x2: +#if __ARM_ARCH__>=7 + ldr r12,.LOPENSSL_armcap +.Lpic: ldr r12,[pc,r12] + tst r12,#1 + beq .Lialu + + veor $A1,$A1 + vmov.32 $B1,r3,r3 @ two copies of b1 + vmov.32 ${A1}[0],r1 @ a1 + + veor $A0,$A0 + vld1.32 ${B0}[],[sp,:32] @ two copies of b0 + vmov.32 ${A0}[0],r2 @ a0 + mov r12,lr + + vmov d16,$A1 + vmov d17,$B1 + bl mul_1x1_neon @ a1·b1 + vmov $A1B1,d0 + + vmov d16,$A0 + vmov d17,$B0 + bl mul_1x1_neon @ a0·b0 + vmov $A0B0,d0 + + veor d16,$A0,$A1 + veor d17,$B0,$B1 + veor $A0,$A0B0,$A1B1 + bl mul_1x1_neon @ (a0+a1)·(b0+b1) + + veor d0,$A0 @ (a0+a1)·(b0+b1)-a0·b0-a1·b1 + vshl.u64 d1,d0,#32 + vshr.u64 d0,d0,#32 + veor $A0B0,d1 + veor $A1B1,d0 + vst1.32 {${A0B0}[0]},[r0,:32]! + vst1.32 {${A0B0}[1]},[r0,:32]! + vst1.32 {${A1B1}[0]},[r0,:32]! + vst1.32 {${A1B1}[1]},[r0,:32] + bx r12 +.align 4 +.Lialu: +#endif +___ +$ret="r10"; # reassigned 1st argument +$code.=<<___; + stmdb sp!,{r4-r10,lr} + mov $ret,r0 @ reassign 1st argument + mov $b,r3 @ $b=b1 + ldr r3,[sp,#32] @ load b0 + mov $mask,#7<<2 + sub sp,sp,#32 @ allocate tab[8] + + bl mul_1x1_ialu @ a1·b1 + str $lo,[$ret,#8] + str $hi,[$ret,#12] + + eor $b,$b,r3 @ flip b0 and b1 + eor $a,$a,r2 @ flip a0 and a1 + eor r3,r3,$b + eor r2,r2,$a + eor $b,$b,r3 + eor $a,$a,r2 + bl mul_1x1_ialu @ a0·b0 + str $lo,[$ret] + str $hi,[$ret,#4] + + eor $a,$a,r2 + eor $b,$b,r3 + bl mul_1x1_ialu @ (a1+a0)·(b1+b0) +___ +@r=map("r$_",(6..9)); +$code.=<<___; + ldmia $ret,{@r[0]-@r[3]} + eor $lo,$lo,$hi + eor $hi,$hi,@r[1] + eor $lo,$lo,@r[0] + eor $hi,$hi,@r[2] + eor $lo,$lo,@r[3] + eor $hi,$hi,@r[3] + str $hi,[$ret,#8] + eor $lo,$lo,$hi + add sp,sp,#32 @ destroy tab[8] + str $lo,[$ret,#4] + +#if __ARM_ARCH__>=5 + ldmia sp!,{r4-r10,pc} +#else + ldmia sp!,{r4-r10,lr} + tst lr,#1 + moveq pc,lr @ be binary compatible with V4, yet + bx lr @ interoperable with Thumb ISA:-) +#endif +.size bn_GF2m_mul_2x2,.-bn_GF2m_mul_2x2 +#if __ARM_ARCH__>=7 +.align 5 +.LOPENSSL_armcap: +.word OPENSSL_armcap_P-(.Lpic+8) +#endif +.asciz "GF(2^m) Multiplication for ARMv4/NEON, CRYPTOGAMS by <appro\@openssl.org>" +.align 5 + +.comm OPENSSL_armcap_P,4,4 +___ + +$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; # enforce flush |