Commit 08853158 authored by Andy Polyakov's avatar Andy Polyakov
Browse files

crypto/bn/asm/x86_64-mont.pl: minor optimization. 

(cherry picked from commit 72a15870)
parent 74e01876

crypto/bn/asm/x86_64-mont.pl

+3 −13
Original line number Diff line number Diff line
@@ -1378,7 +1378,6 @@ $code.=<<___; 
	lea	8*8($nptr),$nptr

	xor	%rax,%rax

	mov	8(%rsp),%rdx		# pull end of t[]

	xor	$carry,$carry

	cmp	0(%rsp),$nptr		# end of n[]?

	jae	.L8x_no_tail
@@ -1491,17 +1490,10 @@ $code.=<<___; 
.align	32

.L8x_tail_done:

	add	(%rdx),%r8		# can this overflow?

	adc	\$0,%r9

	adc	\$0,%r10

	adc	\$0,%r11

	adc	\$0,%r12

	adc	\$0,%r13

	adc	\$0,%r14

	adc	\$0,%r15

	sbb	%rax,%rax

	xor	%rax,%rax



.L8x_no_tail:

	neg	$carry

.L8x_no_tail:

	adc	8*0($tptr),%r8

	adc	8*1($tptr),%r9

	adc	8*2($tptr),%r10
@@ -1510,9 +1502,7 @@ $code.=<<___; 
	adc	8*5($tptr),%r13

	adc	8*6($tptr),%r14

	adc	8*7($tptr),%r15

	sbb	$carry,$carry

	neg	%rax

	sub	$carry,%rax		# top-most carry

	adc	\$0,%rax		# top-most carry



	mov	40(%rsp),$nptr		# restore $nptr