Commit 81ee80ab authored by Andy Polyakov's avatar Andy Polyakov
Browse files

+45% RC4 performance boost on Intel EM64T core. Unrolled loop providing 

further +35% will follow...

Submitted by: Zou Nanhai
parent 7d727231

crypto/rc4/asm/rc4-amd64.pl

+4 −4
Original line number Diff line number Diff line
@@ -181,7 +181,7 @@ $code.=<<___; 


.align	16

.LRC4_CHAR:

	inc	$XX#b

	add	\$1,$XX#b

	movzb	`&PTR("BYTE:[$dat+$XX]")`,$TX#d

	add	$TX#b,$YY#b

	movzb	`&PTR("BYTE:[$dat+$YY]")`,$TY#d
@@ -191,9 +191,9 @@ $code.=<<___; 
	movzb	`&PTR("BYTE:[$dat+$TY]")`,$TY#d

	xorb	`&PTR("BYTE:[$inp]")`,$TY#b

	movb	$TY#b,`&PTR("BYTE:[$out]")`

	inc	$inp

	inc	$out

	dec	$len

	lea	1($inp),$inp

	lea	1($out),$out

	sub	\$1,$len

	jnz	.LRC4_CHAR

	jmp	.Lexit

___