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sha512-armv4.pl: optimize NEON code path by utilizing vbsl, bitwise select.

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This commit is contained in:
Andy Polyakov 2012-03-29 18:20:11 +00:00
parent ee743dca53
commit 482a7d80cf
1 changed files with 12 additions and 15 deletions
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27
crypto/sha/asm/sha512-armv4.pl
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@ -26,7 +26,7 @@
# March 2011.
#
# Add NEON implementation. On Cortex A8 it was measured to process
# one byte in 25.5 cycles or 47% faster than integer-only code.
# one byte in 23.3 cycles or ~60% faster than integer-only code.
# Byte order [in]dependence. =========================================
#
@ -463,31 +463,28 @@ $code.=<<___;
vld1.64 {$K},[$Ktbl,:64]! @ K[i++]
vsli.64 $t0,$e,#`64-@Sigma1[0]`
vsli.64 $t1,$e,#`64-@Sigma1[1]`
vmov $Ch,$e
vsli.64 $t2,$e,#`64-@Sigma1[2]`
#if $i<16 && defined(__ARMEL__)
vrev64.8 @X[$i],@X[$i]
#endif
vadd.i64 $T1,$K,$h
veor $Ch,$f,$g
veor $t0,$t1
vand $Ch,$e
veor $t0,$t2 @ Sigma1(e)
veor $Ch,$g @ Ch(e,f,g)
vadd.i64 $T1,$t0
vbsl $Ch,$f,$g @ Ch(e,f,g)
veor $t1,$t0
vshr.u64 $t0,$a,#@Sigma0[0]
vadd.i64 $T1,$Ch
veor $t2,$t1 @ Sigma1(e)
vshr.u64 $t1,$a,#@Sigma0[1]
vadd.i64 $T1,$h,$t2
vshr.u64 $t2,$a,#@Sigma0[2]
vadd.i64 $T1,$Ch
vsli.64 $t0,$a,#`64-@Sigma0[0]`
vsli.64 $t1,$a,#`64-@Sigma0[1]`
vsli.64 $t2,$a,#`64-@Sigma0[2]`
vadd.i64 $T1,@X[$i%16]
vorr $Maj,$a,$c
vand $Ch,$a,$c
vsli.64 $t1,$a,#`64-@Sigma0[1]`
vadd.i64 $T1,$K
vsli.64 $t2,$a,#`64-@Sigma0[2]`
veor $h,$t0,$t1
vand $Maj,$b
veor $Maj,$a,$b
veor $h,$t2 @ Sigma0(a)
vorr $Maj,$Ch @ Maj(a,b,c)
vbsl $Maj,$c,$b @ Maj(a,b,c)
vadd.i64 $h,$T1
vadd.i64 $d,$T1
vadd.i64 $h,$Maj