diff options
Diffstat (limited to 'libbb/hash_md5_sha_x86-64.S.sh')
| -rwxr-xr-x | libbb/hash_md5_sha_x86-64.S.sh | 33 |
1 files changed, 20 insertions, 13 deletions
diff --git a/libbb/hash_md5_sha_x86-64.S.sh b/libbb/hash_md5_sha_x86-64.S.sh index 5f09546..c5f0ef5 100755 --- a/libbb/hash_md5_sha_x86-64.S.sh +++ b/libbb/hash_md5_sha_x86-64.S.sh @@ -74,22 +74,24 @@ test "$1" -ge 8 && echo "%r${1}d" RD1A() { local a=$1;local b=$2;local c=$3;local d=$4;local e=$5 local n=$(($6)) -echo "# $n" -test $n = 0 && echo " +local n0=$(((n+0) & 15)) +echo " +# $n +";test $n0 = 0 && echo " # W[0], already in %esi -";test $n != 0 && test $n -lt 8 && echo " - movl `W32 $n`, %esi # W[n] -";test $n -ge 8 && echo " - # W[n], in %r$n +";test $n0 != 0 && test $n0 -lt 8 && echo " + movl `W32 $n0`, %esi # W[n] +";test $n0 -ge 8 && echo " + # W[n], in %r$n0 ";echo " movl %e$c, %edi # c xorl %e$d, %edi # ^d andl %e$b, %edi # &b xorl %e$d, %edi # (((c ^ d) & b) ^ d) -";test $n -lt 8 && echo " - leal $RCONST(%r$e,%rsi),%e$e # e += RCONST + W[n] -";test $n -ge 8 && echo " - leal $RCONST(%r$e,%r$n),%e$e # e += RCONST + W[n] +";test $n0 -lt 8 && echo " + leal $RCONST(%r$e,%rsi), %e$e # e += RCONST + W[n] +";test $n0 -ge 8 && echo " + leal $RCONST(%r$e,%r$n0), %e$e # e += RCONST + W[n] ";echo " addl %edi, %e$e # e += (((c ^ d) & b) ^ d) movl %e$a, %esi # @@ -119,7 +121,7 @@ echo " xorl `W32 $n8`, `W32 $n0` # ^W[(n+8) & 15] xorl `W32 $n2`, `W32 $n0` # ^W[(n+2) & 15] roll `W32 $n0` # -"; echo " +";echo " movl %e$c, %edi # c xorl %e$d, %edi # ^d andl %e$b, %edi # &b @@ -165,7 +167,7 @@ echo " xorl `W32 $n8`, `W32 $n0` # ^W[(n+8) & 15] xorl `W32 $n2`, `W32 $n0` # ^W[(n+2) & 15] roll `W32 $n0` # -"; echo " +";echo " movl %e$c, %edi # c xorl %e$d, %edi # ^d xorl %e$b, %edi # ^b @@ -216,7 +218,7 @@ echo " xorl `W32 $n8`, `W32 $n0` # ^W[(n+8) & 15] xorl `W32 $n2`, `W32 $n0` # ^W[(n+2) & 15] roll `W32 $n0` # -"; echo " +";echo " addl %edi, %e$e # += ((b | c) & d) | (b & c) ";test $n0 -lt 8 && echo " leal $RCONST(%r$e,%rsi), %e$e # e += RCONST + W[n & 15] @@ -246,6 +248,11 @@ RD2 ax bx cx dx bp 60; RD2 bp ax bx cx dx 61; RD2 dx bp ax bx cx 62; RD2 cx dx b RD2 ax bx cx dx bp 65; RD2 bp ax bx cx dx 66; RD2 dx bp ax bx cx 67; RD2 cx dx bp ax bx 68; RD2 bx cx dx bp ax 69 RD2 ax bx cx dx bp 70; RD2 bp ax bx cx dx 71; RD2 dx bp ax bx cx 72; RD2 cx dx bp ax bx 73; RD2 bx cx dx bp ax 74 RD2 ax bx cx dx bp 75; RD2 bp ax bx cx dx 76; RD2 dx bp ax bx cx 77; RD2 cx dx bp ax bx 78; RD2 bx cx dx bp ax 79 +# Note: new W[n&15] values generated in last 3 iterations +# (W[13,14,15]) are unused after each of these iterations. +# Since we use r8..r15 for W[8..15], this does not matter. +# If we switch to e.g. using r8..r15 for W[0..7], then saving of W[13,14,15] +# (the "movl %esi, `W32 $n0`" insn) is a dead store and can be removed. } | grep -v '^$' echo " |