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@@ -13,6 +13,29 @@
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# "cluster" Address Generation Interlocks, so that one pipeline stall
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# resolves several dependencies.
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# November 2010.
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#
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# Adapt for -m31 build. If kernel supports what's called "highgprs"
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# feature on Linux [see /proc/cpuinfo], it's possible to use 64-bit
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# instructions and achieve "64-bit" performance even in 31-bit legacy
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# application context. The feature is not specific to any particular
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# processor, as long as it's "z-CPU". Latter implies that the code
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# remains z/Architecture specific. On z990 it was measured to perform
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# 50% better than code generated by gcc 4.3.
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$flavour = shift;
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if ($flavour =~ /3[12]/) {
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$SIZE_T=4;
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$g="";
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} else {
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$SIZE_T=8;
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$g="g";
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}
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while (($output=shift) && ($output!~/^\w[\w\-]*\.\w+$/)) {}
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open STDOUT,">$output";
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$rp="%r14";
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$sp="%r15";
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$code=<<___;
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@@ -39,7 +62,12 @@ $code.=<<___;
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.type RC4,\@function
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.align 64
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RC4:
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stmg %r6,%r11,48($sp)
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stm${g} %r6,%r11,6*$SIZE_T($sp)
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___
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$code.=<<___ if ($flavour =~ /3[12]/);
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llgfr $len,$len
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___
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$code.=<<___;
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llgc $XX[0],0($key)
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llgc $YY,1($key)
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la $XX[0],1($XX[0])
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@@ -90,7 +118,7 @@ $code.=<<___;
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xgr $acc,$TX[1]
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stg $acc,0($out)
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la $out,8($out)
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brct $cnt,.Loop8
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brctg $cnt,.Loop8
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.Lshort:
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lghi $acc,7
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@@ -122,7 +150,7 @@ $code.=<<___;
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ahi $XX[0],-1
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stc $XX[0],0($key)
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stc $YY,1($key)
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lmg %r6,%r11,48($sp)
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lm${g} %r6,%r11,6*$SIZE_T($sp)
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br $rp
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.size RC4,.-RC4
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.string "RC4 for s390x, CRYPTOGAMS by <appro\@openssl.org>"
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@@ -143,11 +171,11 @@ $ikey="%r7";
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$iinp="%r8";
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$code.=<<___;
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.globl RC4_set_key
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.type RC4_set_key,\@function
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.globl private_RC4_set_key
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.type private_RC4_set_key,\@function
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.align 64
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RC4_set_key:
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stmg %r6,%r8,48($sp)
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private_RC4_set_key:
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stm${g} %r6,%r8,6*$SIZE_T($sp)
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lhi $cnt,256
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la $idx,0(%r0)
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sth $idx,0($key)
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@@ -180,9 +208,9 @@ RC4_set_key:
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la $iinp,0(%r0)
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j .L2ndloop
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.Ldone:
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lmg %r6,%r8,48($sp)
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lm${g} %r6,%r8,6*$SIZE_T($sp)
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br $rp
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.size RC4_set_key,.-RC4_set_key
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.size private_RC4_set_key,.-private_RC4_set_key
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___
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}
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@@ -203,3 +231,4 @@ RC4_options:
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___
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print $code;
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close STDOUT; # force flush
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