Commit 4eeb750d authored by Andy Polyakov's avatar Andy Polyakov
Browse files

bn/asm/x86_64-mont.pl: minor optimization [for Decoded ICache].

parent ed77017b

crypto/bn/asm/x86_64-mont.pl

+151 −138
Original line number Diff line number Diff line
@@ -1685,6 +1685,7 @@ bn_mulx4x_mont: 
	push	%r15



	shl	\$3,${num}d		# convert $num to bytes

	.byte	0x67

	xor	%r10,%r10

	mov	%rsp,%r11		# put aside %rsp

	sub	$num,%r10		# -$num
@@ -1725,15 +1726,14 @@ $code.=<<___; 
	mov	($bp),%rdx		# b[0], $bp==%rdx actually

	lea	64+32(%rsp),$tptr

	mov	%rdx,$bi

	xor	$zero,$zero		# of=0,cf=0



	mulx	0*8($aptr),$mi,%rax	# a[0]*b[0]

	mulx	1*8($aptr),%r11,%r14	# a[1]*b[0]

	adcx	%rax,%r11

	add	%rax,%r11

	mov	$bptr,8(%rsp)		# off-load &b[i]

	mulx	2*8($aptr),%r12,%r13	# ...

	adcx	%r14,%r12

	adcx	$zero,%r13

	adc	%r14,%r12

	adc	\$0,%r13



	mov	$mi,$bptr		# borrow $bptr

	imulq	24(%rsp),$mi		# "t[0]"*n0
@@ -1751,13 +1751,12 @@ $code.=<<___; 
	mulx	1*8($nptr),%rax,%r11

	adcx	%rax,%r10

	adox	%r12,%r11

	mulx	2*8($nptr),%rax,%r12

	.byte	0xc4,0x62,0xfb,0xf6,0xa1,0x10,0x00,0x00,0x00	# mulx	2*8($nptr),%rax,%r12

	mov	48(%rsp),$bptr		# counter value

	mov	%r10,-4*8($tptr)

	adcx	%rax,%r11

	adox	%r13,%r12

	mulx	3*8($nptr),%rax,%r15

	 .byte	0x66,0x66

	 mov	$bi,%rdx

	mov	%r11,-3*8($tptr)

	adcx	%rax,%r12
@@ -1765,7 +1764,7 @@ $code.=<<___; 
	lea	4*8($nptr),$nptr

	mov	%r12,-2*8($tptr)



	#jmp	.Lmulx4x_1st

	jmp	.Lmulx4x_1st



.align	32

.Lmulx4x_1st:
@@ -1863,7 +1862,6 @@ $code.=<<___; 
	adox	%r12,%r11

	mulx	2*8($nptr),%rax,%r12

	mov	%r10,-4*8($tptr)

	mov	0*8($tptr),%r10

	adcx	%rax,%r11

	adox	%r13,%r12

	mulx	3*8($nptr),%rax,%r15
@@ -1872,23 +1870,22 @@ $code.=<<___; 
	adcx	%rax,%r12

	adox	$zero,%r15		# of=0

	mov	48(%rsp),$bptr		# counter value

	.byte	0x66,0x3e

	mov	%r12,-2*8($tptr)

	.byte	0x66

	lea	4*8($nptr),$nptr



	jmp	.Lmulx4x_inner

	#jmp	.Lmulx4x_inner



.align	32

.Lmulx4x_inner:

	adcx	$zero,%r15		# cf=0, modulo-scheduled

	adox	%r10,%r14

	adox	0*8($tptr),%r14

	mulx	0*8($aptr),%r10,%rax	# a[4]*b[i]

	mov	1*8($tptr),%r13

	adcx	%r14,%r10

	mulx	1*8($aptr),%r11,%r14	# a[5]*b[i]

	adox	%rax,%r11

	mulx	2*8($aptr),%r12,%rax	# ...

	adcx	%r13,%r11

	adcx	1*8($tptr),%r11

	adox	%r14,%r12

	mulx	3*8($aptr),%r13,%r14

	 mov	$mi,%rdx
@@ -1896,8 +1893,8 @@ $code.=<<___; 
	adox	%rax,%r13

	adcx	3*8($tptr),%r13

	adox	$zero,%r14		# of=0

	.byte	0x48,0x8d,0xb6,0x20,0x00,0x00,0x00	# lea	4*8($aptr),$aptr

	.byte	0x48,0x8d,0x9b,0x20,0x00,0x00,0x00	# lea	4*8($tptr),$tptr

	lea	4*8($aptr),$aptr

	lea	4*8($tptr),$tptr

	adcx	$zero,%r14		# cf=0



	adox	%r15,%r10
@@ -1909,7 +1906,6 @@ $code.=<<___; 
	adox	%r15,%r12

	mulx	2*8($nptr),%rax,%r15

	mov	%r10,-5*8($tptr)

	mov	0*8($tptr),%r10

	adcx	%rax,%r12

	adox	%r15,%r13

	mulx	3*8($nptr),%rax,%r15
@@ -1927,7 +1923,7 @@ $code.=<<___; 
	mov	0(%rsp),$num		# load num

	mov	8(%rsp),$bptr		# re-load &b[i]

	adc	$zero,%r15		# modulo-scheduled

	sub	%r10,$zero		# pull top-most carry

	sub	0*8($tptr),$zero	# pull top-most carry

	adc	%r15,%r14

	sbb	%r15,%r15		# top-most carry

	mov	%r14,-1*8($tptr)
@@ -1936,10 +1932,10 @@ $code.=<<___; 
	jne	.Lmulx4x_outer



	neg	$num

	xor	%rdx,%rdx

	mov	32(%rsp),$rptr		# restore rp

	lea	64(%rsp),$tptr



	xor	%rdx,%rdx

	pxor	%xmm0,%xmm0

	mov	0*8($nptr,$num),%r8

	mov	1*8($nptr,$num),%r9
@@ -2022,6 +2018,7 @@ bn_sqrx8x_mont: 
	push	%r15



	shl	\$3,${num}d		# convert $num to bytes

	.byte	0x67

	xor	%r10,%r10

	mov	%rsp,%r11		# put aside %rsp

	sub	$num,%r10		# -$num
@@ -2043,6 +2040,12 @@ bn_sqrx8x_mont: 
	movq	%r10, %xmm3		# -$num

	movq	%r11, %xmm4		# save original %rsp

	mov	$n0,  32(%rsp)

___

$code.=<<___ if ($win64);

	jmp	.Lsqrx8x_body

.align	32

___

$code.=<<___;

.Lsqrx8x_body:

	##################################################################

	# Squaring part:
@@ -2096,12 +2099,15 @@ $code.=<<___; 
	mov	$aaptr,8(%rsp)		# save end of $aptr

	jmp	.Lsqr8x_zero_start



.align	32

.byte	0x66,0x66,0x66,0x2e,0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00

.Lsqrx8x_zero:

	.byte	0x3e

	movdqa	%xmm0,0*8($tptr)

	movdqa	%xmm0,2*8($tptr)

	movdqa	%xmm0,4*8($tptr)

	movdqa	%xmm0,6*8($tptr)

.Lsqr8x_zero_start:

.Lsqr8x_zero_start:			# aligned at 32

	movdqa	%xmm0,8*8($tptr)

	movdqa	%xmm0,10*8($tptr)

	movdqa	%xmm0,12*8($tptr)
@@ -2111,47 +2117,47 @@ $code.=<<___; 
	jnz	.Lsqrx8x_zero



	mov	0*8($aptr),%rdx		# a[0], modulo-scheduled

	xor	%r8,%r8

	xor	%r9,%r9

	#xor	%r9,%r9			# t[1], ex-$num, zero already

	xor	%r10,%r10

	xor	%r11,%r11

	xor	%r12,%r12

	xor	%r13,%r13

	xor	%r14,%r14

	xor	%r15,%r15

	lea	48(%rsp),$tptr

	xor	$zero,$zero		# cf=0, cf=0

	jmp	.Lsqrx8x_outer_loop



.align	32

.Lsqrx8x_outer_loop:

	mulx	1*8($aptr),%rax,%rbx	# a[1]*a[0]

	adcx	%rax,%r8		# a[1]*a[0]+=t[1]

	adox	%rbx,%r9

	mulx	2*8($aptr),%rax,%rbx	# a[2]*a[0]

	adcx	%rax,%r9

	adox	%rbx,%r10

	.byte	0xc4,0xe2,0xfb,0xf6,0x9e,0x18,0x00,0x00,0x00	# mulx	3*8($aptr),%rax,%rbx	# ...

	adcx	%rax,%r10

	adox	%rbx,%r11

	.byte	0xc4,0xe2,0xfb,0xf6,0x9e,0x20,0x00,0x00,0x00	# mulx	4*8($aptr),%rax,%rbx

	adcx	%rax,%r11

	adox	%rbx,%r12

	mulx	5*8($aptr),%rax,%rbx

	adcx	%rax,%r12

	adox	%rbx,%r13

	mulx	6*8($aptr),%rax,%rbx

	adcx	%rax,%r13

	adox	%rbx,%r14

	mulx	7*8($aptr),%rax,%r15

	mulx	1*8($aptr),%r8,%rax	# a[1]*a[0]

	adcx	%r9,%r8			# a[1]*a[0]+=t[1]

	adox	%rax,%r10

	mulx	2*8($aptr),%r9,%rax	# a[2]*a[0]

	adcx	%r10,%r9

	adox	%rax,%r11

	.byte	0xc4,0xe2,0xab,0xf6,0x86,0x18,0x00,0x00,0x00	# mulx	3*8($aptr),%r10,%rax	# ...

	adcx	%r11,%r10

	adox	%rax,%r12

	.byte	0xc4,0xe2,0xa3,0xf6,0x86,0x20,0x00,0x00,0x00	# mulx	4*8($aptr),%r11,%rax

	adcx	%r12,%r11

	adox	%rax,%r13

	mulx	5*8($aptr),%r12,%rax

	adcx	%r13,%r12

	adox	%rax,%r14

	mulx	6*8($aptr),%r13,%rax

	adcx	%r14,%r13

	adox	%r15,%rax

	mulx	7*8($aptr),%r14,%r15

	 mov	1*8($aptr),%rdx		# a[1]

	adcx	%rax,%r14

	adox	$zero,%r15

	adc	8*8($tptr),%r15

	mov	%r8,1*8($tptr)		# t[1]

	mov	%r9,2*8($tptr)		# t[2]

	sbb	$carry,$carry		# mov %cf,$carry

	xor	$zero,$zero		# cf=0, of=0



	mov	%r8,1*8($tptr)		# t[1]

	mov	%r9,2*8($tptr)		# t[2]



	mulx	2*8($aptr),%r8,%rbx	# a[2]*a[1]

	mulx	3*8($aptr),%r9,%rax	# a[3]*a[1]
@@ -2193,13 +2199,12 @@ $code.=<<___; 
	adcx	%rbx,%r11

	adox	%rax,%r12

	adcx	%r14,%r12

	adox	$zero,%r13		# of=0

	adcx	$zero,%r13		# cf=0



	mov	%r8,5*8($tptr)		# t[5]

	mov	%r9,6*8($tptr)		# t[6]



	 mulx	4*8($aptr),%r8,%rax	# a[4]*a[3]

	adox	$zero,%r13		# of=0

	adcx	$zero,%r13		# cf=0



	mulx	5*8($aptr),%r9,%rbx	# a[5]*a[3]

	adcx	%r10,%r8

	adox	%rax,%r9
@@ -2239,9 +2244,9 @@ $code.=<<___; 
	adcx	%r14,%r11

	adox	%rbx,%r12

	adcx	%rax,%r12

	.byte	0x66,0x66

	adox	$zero,%r13



	.byte	0x67,0x67

	mulx	%r8,%r8,%r14		# a[7]*a[6]

	adcx	%r8,%r13

	adcx	$zero,%r14
@@ -2250,26 +2255,26 @@ $code.=<<___; 
	je	.Lsqrx8x_outer_break



	neg	$carry			# mov $carry,%cf

	mov	\$-8,%rcx

	mov	$zero,%r15

	mov	8*8($tptr),%r8

	adc	9*8($tptr),%r9		# +=t[9]

	adc	10*8($tptr),%r10	# ...

	adc	11*8($tptr),%r11

	adcx	9*8($tptr),%r9		# +=t[9]

	adcx	10*8($tptr),%r10	# ...

	adcx	11*8($tptr),%r11

	adc	12*8($tptr),%r12

	adc	13*8($tptr),%r13

	adc	14*8($tptr),%r14

	adc	15*8($tptr),%r15

	lea	8*8($tptr),$tptr

	sbb	$carry,$carry		# mov %cf,$carry

	lea	($aptr),$aaptr

	lea	2*8*8($tptr),$tptr

	sbb	%rax,%rax		# mov %cf,$carry



	mov	-64($aptr),%rdx		# a[0]

	lea	($aptr),$aaptr

	mov	$carry,16(%rsp)		# offload $carry

	mov	%rax,16(%rsp)		# offload $carry

	mov	$tptr,24(%rsp)



	lea	8*8($tptr),$tptr

	#lea	8*8($tptr),$tptr	# see 2*8*8($tptr) above

	xor	%eax,%eax		# cf=0, of=0

	mov	\$-8,%rcx

	jmp	.Lsqrx8x_loop



.align	32
@@ -2311,17 +2316,20 @@ $code.=<<___; 
	adox	%rbx,%r15		# %rbx is 0, of=0

	adcx	%rbx,%r15		# cf=0



	.byte	0x67

	inc	%rcx			# of=0

	jnz	.Lsqrx8x_loop



	lea	8*8($aaptr),$aaptr

	mov	\$-8,%rcx

	cmp	8(%rsp),$aaptr		# done?

	je	.Lsqrx8x_break



	sub	16(%rsp),%rbx		# mov 16(%rsp),%cf

	.byte	0x66

	mov	-64($aptr),%rdx

	adc	0*8($tptr),%r8

	adc	1*8($tptr),%r9

	adcx	0*8($tptr),%r8

	adcx	1*8($tptr),%r9

	adc	2*8($tptr),%r10

	adc	3*8($tptr),%r11

	adc	4*8($tptr),%r12
@@ -2329,35 +2337,37 @@ $code.=<<___; 
	adc	6*8($tptr),%r14

	adc	7*8($tptr),%r15

	lea	8*8($tptr),$tptr

	sbb	%rbx,%rbx		# mov %cf,%rbx

	xor	%eax,%eax		# cf=0, of=0

	mov	%rbx,16(%rsp)		# offload carry

	mov	\$-8,%rcx

	.byte	0x67

	sbb	%rax,%rax		# mov %cf,%rax

	xor	%ebx,%ebx		# cf=0, of=0

	mov	%rax,16(%rsp)		# offload carry

	jmp	.Lsqrx8x_loop



.align	32

.Lsqrx8x_break:

	sub	16(%rsp),%r8		# consume last carry

	mov	24(%rsp),$aaptr		# initial $tptr

	mov	24(%rsp),$carry		# initial $tptr, borrow $carry

	mov	0*8($aptr),%rdx		# a[8], modulo-scheduled

	xor	%ebp,%ebp		# xor	$zero,$zero

	mov	%r8,0*8($tptr)

	lea	8*8($aaptr),$aaptr

	cmp	$carry,$tptr		# cf=0, of=0

	je	.Lsqrx8x_outer_loop



	mov	%r9,1*8($tptr)

	 mov	1*8($aaptr),%r8		# potentially forwarded store

	 mov	1*8($carry),%r9

	mov	%r10,2*8($tptr)

	 mov	2*8($aaptr),%r9		# ...

	 mov	2*8($carry),%r10

	mov	%r11,3*8($tptr)

	 mov	3*8($aaptr),%r10

	 mov	3*8($carry),%r11

	mov	%r12,4*8($tptr)

	 mov	4*8($aaptr),%r11

	 mov	4*8($carry),%r12

	mov	%r13,5*8($tptr)

	 mov	5*8($aaptr),%r12

	 mov	5*8($carry),%r13

	mov	%r14,6*8($tptr)

	 mov	6*8($aaptr),%r13

	 mov	6*8($carry),%r14

	mov	%r15,7*8($tptr)

	 mov	7*8($aaptr),%r14

	mov	$aaptr,$tptr

	xor	$zero,$zero		# cf=0, cf=0

	 mov	7*8($carry),%r15

	mov	$carry,$tptr

	jmp	.Lsqrx8x_outer_loop



.align	32
@@ -2373,13 +2383,12 @@ ___ 
}{

my $i="%rcx";

$code.=<<___;

	mov	(%rsp),$num		# restore $num



	lea	48(%rsp),$tptr

	mov	($aptr,$i),%rdx		# a[0]



	mov	8($tptr),$A0[1]		# t[1]

	xor	$A0[0],$A0[0]		# t[0], of=0, cf=0

	mov	(%rsp),$num		# restore $num

	adox	$A0[1],$A0[1]

	 mov	16($tptr),$A1[0]	# t[2]	# prefetch

	 mov	24($tptr),$A1[1]	# t[3]	# prefetch
@@ -2440,9 +2449,9 @@ $code.=<<___; 
.align	32

.Lsqrx4x_shift_n_add_break:

	adcx	$A1[1],%rbx

	.byte	0x48,0x89,0x87,0x30,0x00,0x00,0x00	# mov	%rax,48($tptr)

	.byte	0x48,0x89,0x9f,0x38,0x00,0x00,0x00	# mov	%rbx,56($tptr)

	.byte	0x48,0x8d,0xbf,0x40,0x00,0x00,0x00	# lea	64($tptr),$tptr

	mov	%rax,48($tptr)

	mov	%rbx,56($tptr)

	lea	64($tptr),$tptr		# end of t[] buffer

___

}

######################################################################
@@ -2456,17 +2465,16 @@ my ($nptr,$carry,$m0)=("%rbp","%rsi","%rdx"); 


$code.=<<___;

	movq	%xmm2,$nptr

	xor	%eax,%eax		# initial top-most carry bit

	mov	32(%rsp),%rbx		# n0

	mov	48(%rsp),%rdx		# "%r8", 8*0($tptr)

	lea	($nptr,$num),%rax	# end of n[]

	lea	-64($nptr,$num),%rcx	# end of n[]

	#lea	48(%rsp,$num,2),$tptr	# end of t[] buffer

	mov	%rax, 0(%rsp)		# save end of n[]

	mov	%rcx, 0(%rsp)		# save end of n[]

	mov	$tptr,8(%rsp)		# save end of t[]



	lea	48(%rsp),$tptr		# initial t[] window

	xor	%rax,%rax

	nop

	#jmp	.Lsqrx8x_reduction_loop

	jmp	.Lsqrx8x_reduction_loop



.align	32

.Lsqrx8x_reduction_loop:
@@ -2529,29 +2537,31 @@ $code.=<<___; 
	adox	$carry,%r15		# $carry is 0

	adcx	$carry,%r15		# cf=0



	.byte	0x67

	inc	%rcx			# of=0

	jnz	.Lsqrx8x_reduce



	lea	8*8($nptr),$nptr

	xor	%rax,%rax

	.byte	0x66,0x67

	mov	$carry,%rax		# xor	%rax,%rax

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

	jae	.Lsqrx8x_no_tail



	mov	48(%rsp),%rdx		# pull n0*a[0]

	add	8*0($tptr),%r8

	adcx	8*1($tptr),%r9

	adcx	8*2($tptr),%r10

	adcx	8*3($tptr),%r11

	adcx	8*4($tptr),%r12

	adcx	8*5($tptr),%r13

	adcx	8*6($tptr),%r14

	adcx	8*7($tptr),%r15

	lea	8*8($nptr),$nptr

	mov	\$-8,%rcx

	adc	8*1($tptr),%r9

	adc	8*2($tptr),%r10

	adc	8*3($tptr),%r11

	adc	8*4($tptr),%r12

	adc	8*5($tptr),%r13

	adc	8*6($tptr),%r14

	adc	8*7($tptr),%r15

	lea	8*8($tptr),$tptr

	sbb	$carry,$carry		# top carry

	sbb	%rax,%rax		# top carry



	mov	\$-8,%rcx

	mov	$carry,16(%rsp)

	xor	$carry,$carry		# of=0, cf=0

	mov	%rax,16(%rsp)

	jmp	.Lsqrx8x_tail



.align	32
@@ -2588,7 +2598,7 @@ $code.=<<___; 
	mulx	8*7($nptr),%rax,%r15

	 mov	48+72(%rsp,%rcx,8),%rdx	# pull n0*a[i]

	adcx	%rax,%r14

	.byte	0x66

	.byte	0x67

	adox	$carry,%r15

	 mov	%rbx,($tptr,%rcx,8)	# save result

	 mov	%r8,%rbx
@@ -2597,35 +2607,35 @@ $code.=<<___; 
	inc	%rcx			# of=0

	jnz	.Lsqrx8x_tail



	lea	8*8($nptr),$nptr

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

	jae	.Lsqrx8x_tail_done	# break out of loop



	sub	16(%rsp),$carry		# neg	$carry

	sub	16(%rsp),$carry		# mov 16(%rsp),%cf

	 mov	48(%rsp),%rdx		# pull n0*a[0]

	adcx	8*0($tptr),%r8

	adcx	8*1($tptr),%r9

	adcx	8*2($tptr),%r10

	adcx	8*3($tptr),%r11

	adcx	8*4($tptr),%r12

	adcx	8*5($tptr),%r13

	adcx	8*6($tptr),%r14

	adcx	8*7($tptr),%r15

	 lea	8*8($nptr),$nptr

	adc	8*0($tptr),%r8

	adc	8*1($tptr),%r9

	adc	8*2($tptr),%r10

	adc	8*3($tptr),%r11

	adc	8*4($tptr),%r12

	adc	8*5($tptr),%r13

	adc	8*6($tptr),%r14

	adc	8*7($tptr),%r15

	lea	8*8($tptr),$tptr

	sbb	$carry,$carry



	mov	\$-8,%rcx

	mov	$carry,16(%rsp)

	sbb	%rax,%rax



	xor	$carry,$carry		# of=0, cf=0

	mov	%rax,16(%rsp)

	jmp	.Lsqrx8x_tail



.align	32

.Lsqrx8x_tail_done:

	add	24(%rsp),%r8		# can this overflow?

	xor	%rax,%rax

	mov	$carry,%rax		# xor	%rax,%rax



	sub	16(%rsp),$carry		# neg $carry

.Lsqrx8x_no_tail:			# carry flag is 0

	sub	16(%rsp),$carry		# mov 16(%rsp),%cf

.Lsqrx8x_no_tail:			# %cf is 0 if jumped here

	adc	8*0($tptr),%r8

	 movq	%xmm3,%rcx

	adc	8*1($tptr),%r9
@@ -2639,24 +2649,24 @@ $code.=<<___; 
	adc	8*7($tptr),%r15

	adc	%rax,%rax		# top-most carry



	cmp	8(%rsp),$carry		# end of t[]?

	mov	32(%rsp),%rbx		# n0

	mov	8*8($tptr,%rcx),%rdx	# modulo-scheduled "%r8"



	lea	8*8($tptr,%rcx),$tptr	# start of current t[] window

	mov	%r8,-8*8($carry)	# store top 512 bits

	mov	%r9,-8*7($carry)

	mov	%r10,-8*6($carry)

	mov	%r11,-8*5($carry)

	mov	%r12,-8*4($carry)

	mov	%r13,-8*3($carry)

	mov	%r14,-8*2($carry)

	mov	%r15,-8*1($carry)

	mov	%r8,8*0($tptr)		# store top 512 bits

	mov	%r9,8*1($tptr)

	mov	%r10,8*2($tptr)

	mov	%r11,8*3($tptr)

	mov	%r12,8*4($tptr)

	mov	%r13,8*5($tptr)

	mov	%r14,8*6($tptr)

	mov	%r15,8*7($tptr)



	lea	8*8($tptr,%rcx),$tptr	# start of current t[] window

	cmp	8(%rsp),$carry		# end of t[]?

	jb	.Lsqrx8x_reduction_loop



	mov	%rcx,$num

	neg	$num			# restore $num

	mov	%rcx,%rdx		# -$num

	jmp	.Lsqrx8x_post

___

}

##############################################################
@@ -2667,24 +2677,28 @@ my ($rptr,$nptr,$lptr,$i)=($aptr,"%rbp","%rbx","%rcx"); 
my @ri=map("%r$_",(10..13));

my @ni=map("%r$_",(14..15));

$code.=<<___;

	lea	($nptr,$num),$nptr	# end of $nptr

	lea	48(%rsp,$num),$lptr	# end of lower half of t[2*num]

	lea	48(%rsp,$num),$tptr

.align	32

.Lsqrx8x_post:

	neg	%rdx			# restore $num

	neg	%rax			# top-most carry as mask

	mov	0*8($nptr),%r8

	mov	1*8($nptr),%r9

	lea	($nptr,%rdx),$nptr	# end of $nptr

	lea	48(%rsp,%rdx),$lptr	# end of lower half of t[2*num]

	lea	48(%rsp,%rdx),$tptr

	.byte	0x67

	xor	%rdx,%rdx

	movq	%xmm1,$rptr		# restore $rptr



	mov	0*8($nptr,$i),%r8

	mov	1*8($nptr,$i),%r9

	neg	%r8

	jmp	.Lsqrx8x_sub_entry



.align	32

.byte	0x66,0x66,0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00

.Lsqrx8x_sub:

	mov	0*8($nptr,$i),%r8

	mov	1*8($nptr,$i),%r9

	not	%r8

.Lsqrx8x_sub_entry:

.Lsqrx8x_sub_entry:			# aligned at 32

	mov	2*8($nptr,$i),%r10

	not	%r9

	and	%rax,%r8
@@ -2709,28 +2723,27 @@ $code.=<<___; 
	movdqa	%xmm0,2*8($lptr,$i)

	and	%rax,%r15



	neg	%rdx			# mov %rdx,%cf

	neg	%edx			# mov %edx,%cf

	movdqa	%xmm0,4*8($lptr,$i)

	adc	0*8($tptr),%r8

	mov	%r8,0*8($rptr)		# result

	adc	1*8($tptr),%r9

	movdqa	%xmm0,6*8($lptr,$i)

	adc	2*8($tptr),%r10

	mov	%r9,1*8($rptr)

	adc	3*8($tptr),%r11

	movdqa	%xmm0,0*8($tptr)	# zap upper half

	adc	4*8($tptr),%r12

	mov	%r10,2*8($rptr)

	adc	5*8($tptr),%r13

	movdqa	%xmm0,2*8($tptr)

	adc	6*8($tptr),%r14

	mov	%r11,3*8($rptr)

	adc	7*8($tptr),%r15

	sbb	%edx,%edx		# mov %cf,%edx

	movdqa	%xmm0,4*8($tptr)

	sbb	%rdx,%rdx		# mov %cf,%rdx

	movdqa	%xmm0,6*8($tptr)

	lea	8*8($tptr),$tptr



	mov	%r8,0*8($rptr)

	mov	%r9,1*8($rptr)

	mov	%r10,2*8($rptr)

	mov	%r11,3*8($rptr)

	mov	%r12,4*8($rptr)

	mov	%r13,5*8($rptr)

	mov	%r14,6*8($rptr)