I've been compiling OpenSSL on a Windows machine using the default "nt.mak".
OpenSSL 0.9.7e compiled fine this way, but I'm having trouble with 0.9.7f:
nasmw -f win32 -o crypto\rc4\asm\r4_win32.obj
.\crypto\rc4\asm\r4_win32.asm
.\crypto\rc4\asm\r4_win32.asm:30: error: operation size not specified
.\crypto\rc4\asm\r4_win32.asm:265: error: operation size not specified
.\crypto\rc4\asm\r4_win32.asm:267: error: operation size not specified
.\crypto\rc4\asm\r4_win32.asm:271: error: operation size not specified
NMAKE : fatal error U1077: 'nasmw' : return code '0x1'
Stop.
When I use the previous version of /crypto/rc4/asm/rc4-586.pl, it compiles
fine. This was obviously triggered by the changes seen here:
http://cvs.openssl.org/filediff?f=openssl/crypto/rc4/asm/rc4-586.pl&v1=1.1.1
.1&v2=1.1.1.1.12.1.
I've included excerpts of the diff that show which parts of the script are
generating the compile errors.
Thanks in advance.
Matthias Miller
--------------------------------------------------------------------
&stack_push(3); # 3 temp variables
&add( $d, 8);
- &and( $x, 0xff);
+
+ # detect compressed schedule, see commentary section in
rc4_skey.c...
+ # in 0.9.7 context ~50 bytes below RC4_CHAR label remain redundant,
+ # as compressed key schedule is set up in 0.9.8 and later.
+ &cmp(&DWP(256,$d),-1);
+ &je(&label("RC4_CHAR"));
&lea( $ty, &DWP(-8,$ty,$in));
...
&RC4_loop(5,0,1);
&RC4_loop(6,1,1);
+ &jmp(&label("finished"));
+
+ &align(16);
+ # this is essentially Intel P4 specific codepath, see rc4_skey.c,
+ # and is engaged in 0.9.8 and later context...
+ &set_label("RC4_CHAR");
+
+ &lea ($ty,&DWP(0,$in,$ty));
+ &mov (&swtmp(2),$ty);
+
+ # strangely enough unrolled loop performs over 20% slower...
+ &set_label("RC4_CHAR_loop");
+ &movz ($tx,&BP(0,$d,$x));
+ &add (&LB($y),&LB($tx));
+ &movz ($ty,&BP(0,$d,$y));
+ &movb (&BP(0,$d,$y),&LB($tx));
+ &movb (&BP(0,$d,$x),&LB($ty));
+ &add (&LB($ty),&LB($tx));
+ &movz ($ty,&BP(0,$d,$ty));
+ &xorb (&LB($ty),&BP(0,$in));
+ &movb (&BP(0,$out),&LB($ty));
+ &inc (&LB($x));
+ &inc ($in);
+ &inc ($out);
+ &cmp ($in,&swtmp(2));
+ &jb (&label("RC4_CHAR_loop"));
+
&set_label("finished");
&dec( $x);
&stack_pop(3);
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