aboutsummaryrefslogtreecommitdiff
path: root/openssl/crypto/rc5/asm/rc5-586.pl
diff options
context:
space:
mode:
Diffstat (limited to 'openssl/crypto/rc5/asm/rc5-586.pl')
-rw-r--r--openssl/crypto/rc5/asm/rc5-586.pl109
1 files changed, 109 insertions, 0 deletions
diff --git a/openssl/crypto/rc5/asm/rc5-586.pl b/openssl/crypto/rc5/asm/rc5-586.pl
new file mode 100644
index 000000000..edff1d1e6
--- /dev/null
+++ b/openssl/crypto/rc5/asm/rc5-586.pl
@@ -0,0 +1,109 @@
+#!/usr/local/bin/perl
+
+push(@INC,"perlasm","../../perlasm");
+require "x86asm.pl";
+require "cbc.pl";
+
+&asm_init($ARGV[0],"rc5-586.pl");
+
+$RC5_MAX_ROUNDS=16;
+$RC5_32_OFF=($RC5_MAX_ROUNDS+2)*4;
+$A="edi";
+$B="esi";
+$S="ebp";
+$tmp1="eax";
+$r="ebx";
+$tmpc="ecx";
+$tmp4="edx";
+
+&RC5_32_encrypt("RC5_32_encrypt",1);
+&RC5_32_encrypt("RC5_32_decrypt",0);
+&cbc("RC5_32_cbc_encrypt","RC5_32_encrypt","RC5_32_decrypt",0,4,5,3,-1,-1);
+&asm_finish();
+
+sub RC5_32_encrypt
+ {
+ local($name,$enc)=@_;
+
+ &function_begin_B($name,"");
+
+ &comment("");
+
+ &push("ebp");
+ &push("esi");
+ &push("edi");
+ &mov($tmp4,&wparam(0));
+ &mov($S,&wparam(1));
+
+ &comment("Load the 2 words");
+ &mov($A,&DWP(0,$tmp4,"",0));
+ &mov($B,&DWP(4,$tmp4,"",0));
+
+ &push($r);
+ &mov($r, &DWP(0,$S,"",0));
+
+ # encrypting part
+
+ if ($enc)
+ {
+ &add($A, &DWP(4+0,$S,"",0));
+ &add($B, &DWP(4+4,$S,"",0));
+
+ for ($i=0; $i<$RC5_MAX_ROUNDS; $i++)
+ {
+ &xor($A, $B);
+ &mov($tmp1, &DWP(12+$i*8,$S,"",0));
+ &mov($tmpc, $B);
+ &rotl($A, &LB("ecx"));
+ &add($A, $tmp1);
+
+ &xor($B, $A);
+ &mov($tmp1, &DWP(16+$i*8,$S,"",0));
+ &mov($tmpc, $A);
+ &rotl($B, &LB("ecx"));
+ &add($B, $tmp1);
+ if (($i == 7) || ($i == 11))
+ {
+ &cmp($r, $i+1);
+ &je(&label("rc5_exit"));
+ }
+ }
+ }
+ else
+ {
+ &cmp($r, 12);
+ &je(&label("rc5_dec_12"));
+ &cmp($r, 8);
+ &je(&label("rc5_dec_8"));
+ for ($i=$RC5_MAX_ROUNDS; $i > 0; $i--)
+ {
+ &set_label("rc5_dec_$i") if ($i == 12) || ($i == 8);
+ &mov($tmp1, &DWP($i*8+8,$S,"",0));
+ &sub($B, $tmp1);
+ &mov($tmpc, $A);
+ &rotr($B, &LB("ecx"));
+ &xor($B, $A);
+
+ &mov($tmp1, &DWP($i*8+4,$S,"",0));
+ &sub($A, $tmp1);
+ &mov($tmpc, $B);
+ &rotr($A, &LB("ecx"));
+ &xor($A, $B);
+ }
+ &sub($B, &DWP(4+4,$S,"",0));
+ &sub($A, &DWP(4+0,$S,"",0));
+ }
+
+ &set_label("rc5_exit");
+ &mov(&DWP(0,$tmp4,"",0),$A);
+ &mov(&DWP(4,$tmp4,"",0),$B);
+
+ &pop("ebx");
+ &pop("edi");
+ &pop("esi");
+ &pop("ebp");
+ &ret();
+ &function_end_B($name);
+ }
+
+