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Commit 7ae3aaf5 authored by David S. Miller's avatar David S. Miller
Browse files

sparc64: Convert NGcopy_{from,to}_user to accurate exception reporting. 



Report the exact number of bytes which have not been successfully
copied when an exception occurs, using the running remaining length.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 95707704

arch/sparc/lib/NGcopy_from_user.S

+2 −2
Original line number Diff line number Diff line
@@ -3,11 +3,11 @@ 
 * Copyright (C) 2006, 2007 David S. Miller (davem@davemloft.net)

 */



#define EX_LD(x)		\

#define EX_LD(x,y)		\

98:	x;			\

	.section __ex_table,"a";\

	.align 4;		\

	.word 98b, __ret_mone_asi;\

	.word 98b, y;		\

	.text;			\

	.align 4;

arch/sparc/lib/NGcopy_to_user.S

+2 −2
Original line number Diff line number Diff line
@@ -3,11 +3,11 @@ 
 * Copyright (C) 2006, 2007 David S. Miller (davem@davemloft.net)

 */



#define EX_ST(x)		\

#define EX_ST(x,y)		\

98:	x;			\

	.section __ex_table,"a";\

	.align 4;		\

	.word 98b, __ret_mone_asi;\

	.word 98b, y;		\

	.text;			\

	.align 4;

arch/sparc/lib/NGmemcpy.S

+158 −75
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ 
 */



#ifdef __KERNEL__

#include <linux/linkage.h>

#include <asm/asi.h>

#include <asm/thread_info.h>

#define GLOBAL_SPARE	%g7
@@ -27,15 +28,11 @@ 
#endif



#ifndef EX_LD

#define EX_LD(x)	x

#define EX_LD(x,y)	x

#endif



#ifndef EX_ST

#define EX_ST(x)	x

#endif



#ifndef EX_RETVAL

#define EX_RETVAL(x)	x

#define EX_ST(x,y)	x

#endif



#ifndef LOAD
@@ -79,6 +76,92 @@ 
	.register	%g3,#scratch



	.text

#ifndef EX_RETVAL

#define EX_RETVAL(x)	x

__restore_asi:

	ret

	wr	%g0, ASI_AIUS, %asi

	 restore

ENTRY(NG_ret_i2_plus_i4_plus_1)

	ba,pt	%xcc, __restore_asi

	 add	%i2, %i5, %i0

ENDPROC(NG_ret_i2_plus_i4_plus_1)

ENTRY(NG_ret_i2_plus_g1)

	ba,pt	%xcc, __restore_asi

	 add	%i2, %g1, %i0

ENDPROC(NG_ret_i2_plus_g1)

ENTRY(NG_ret_i2_plus_g1_minus_8)

	sub	%g1, 8, %g1

	ba,pt	%xcc, __restore_asi

	 add	%i2, %g1, %i0

ENDPROC(NG_ret_i2_plus_g1_minus_8)

ENTRY(NG_ret_i2_plus_g1_minus_16)

	sub	%g1, 16, %g1

	ba,pt	%xcc, __restore_asi

	 add	%i2, %g1, %i0

ENDPROC(NG_ret_i2_plus_g1_minus_16)

ENTRY(NG_ret_i2_plus_g1_minus_24)

	sub	%g1, 24, %g1

	ba,pt	%xcc, __restore_asi

	 add	%i2, %g1, %i0

ENDPROC(NG_ret_i2_plus_g1_minus_24)

ENTRY(NG_ret_i2_plus_g1_minus_32)

	sub	%g1, 32, %g1

	ba,pt	%xcc, __restore_asi

	 add	%i2, %g1, %i0

ENDPROC(NG_ret_i2_plus_g1_minus_32)

ENTRY(NG_ret_i2_plus_g1_minus_40)

	sub	%g1, 40, %g1

	ba,pt	%xcc, __restore_asi

	 add	%i2, %g1, %i0

ENDPROC(NG_ret_i2_plus_g1_minus_40)

ENTRY(NG_ret_i2_plus_g1_minus_48)

	sub	%g1, 48, %g1

	ba,pt	%xcc, __restore_asi

	 add	%i2, %g1, %i0

ENDPROC(NG_ret_i2_plus_g1_minus_48)

ENTRY(NG_ret_i2_plus_g1_minus_56)

	sub	%g1, 56, %g1

	ba,pt	%xcc, __restore_asi

	 add	%i2, %g1, %i0

ENDPROC(NG_ret_i2_plus_g1_minus_56)

ENTRY(NG_ret_i2_plus_i4)

	ba,pt	%xcc, __restore_asi

	 add	%i2, %i4, %i0

ENDPROC(NG_ret_i2_plus_i4)

ENTRY(NG_ret_i2_plus_i4_minus_8)

	sub	%i4, 8, %i4

	ba,pt	%xcc, __restore_asi

	 add	%i2, %i4, %i0

ENDPROC(NG_ret_i2_plus_i4_minus_8)

ENTRY(NG_ret_i2_plus_8)

	ba,pt	%xcc, __restore_asi

	 add	%i2, 8, %i0

ENDPROC(NG_ret_i2_plus_8)

ENTRY(NG_ret_i2_plus_4)

	ba,pt	%xcc, __restore_asi

	 add	%i2, 4, %i0

ENDPROC(NG_ret_i2_plus_4)

ENTRY(NG_ret_i2_plus_1)

	ba,pt	%xcc, __restore_asi

	 add	%i2, 1, %i0

ENDPROC(NG_ret_i2_plus_1)

ENTRY(NG_ret_i2_plus_g1_plus_1)

	add	%g1, 1, %g1

	ba,pt	%xcc, __restore_asi

	 add	%i2, %g1, %i0

ENDPROC(NG_ret_i2_plus_g1_plus_1)

ENTRY(NG_ret_i2)

	ba,pt	%xcc, __restore_asi

	 mov	%i2, %i0

ENDPROC(NG_ret_i2)

ENTRY(NG_ret_i2_and_7_plus_i4)

	and	%i2, 7, %i2

	ba,pt	%xcc, __restore_asi

	 add	%i2, %i4, %i0

ENDPROC(NG_ret_i2_and_7_plus_i4)

#endif



	.align		64



	.globl	FUNC_NAME
@@ -126,8 +209,8 @@ FUNC_NAME: /* %i0=dst, %i1=src, %i2=len */ 
	sub		%g0, %i4, %i4	! bytes to align dst

	sub		%i2, %i4, %i2

1:	subcc		%i4, 1, %i4

	EX_LD(LOAD(ldub, %i1, %g1))

	EX_ST(STORE(stb, %g1, %o0))

	EX_LD(LOAD(ldub, %i1, %g1), NG_ret_i2_plus_i4_plus_1)

	EX_ST(STORE(stb, %g1, %o0), NG_ret_i2_plus_i4_plus_1)

	add		%i1, 1, %i1

	bne,pt		%XCC, 1b

	add		%o0, 1, %o0
@@ -160,7 +243,7 @@ FUNC_NAME: /* %i0=dst, %i1=src, %i2=len */ 
	and		%i4, 0x7, GLOBAL_SPARE

	sll		GLOBAL_SPARE, 3, GLOBAL_SPARE

	mov		64, %i5

	EX_LD(LOAD_TWIN(%i1, %g2, %g3))

	EX_LD(LOAD_TWIN(%i1, %g2, %g3), NG_ret_i2_plus_g1)

	sub		%i5, GLOBAL_SPARE, %i5

	mov		16, %o4

	mov		32, %o5
@@ -178,31 +261,31 @@ FUNC_NAME: /* %i0=dst, %i1=src, %i2=len */ 
	srlx		WORD3, PRE_SHIFT, TMP; \

	or		WORD2, TMP, WORD2;



8:	EX_LD(LOAD_TWIN(%i1 + %o4, %o2, %o3))

8:	EX_LD(LOAD_TWIN(%i1 + %o4, %o2, %o3), NG_ret_i2_plus_g1)

	MIX_THREE_WORDS(%g2, %g3, %o2, %i5, GLOBAL_SPARE, %o1)

	LOAD(prefetch, %i1 + %i3, #one_read)



	EX_ST(STORE_INIT(%g2, %o0 + 0x00))

	EX_ST(STORE_INIT(%g3, %o0 + 0x08))

	EX_ST(STORE_INIT(%g2, %o0 + 0x00), NG_ret_i2_plus_g1)

	EX_ST(STORE_INIT(%g3, %o0 + 0x08), NG_ret_i2_plus_g1_minus_8)



	EX_LD(LOAD_TWIN(%i1 + %o5, %g2, %g3))

	EX_LD(LOAD_TWIN(%i1 + %o5, %g2, %g3), NG_ret_i2_plus_g1_minus_16)

	MIX_THREE_WORDS(%o2, %o3, %g2, %i5, GLOBAL_SPARE, %o1)



	EX_ST(STORE_INIT(%o2, %o0 + 0x10))

	EX_ST(STORE_INIT(%o3, %o0 + 0x18))

	EX_ST(STORE_INIT(%o2, %o0 + 0x10), NG_ret_i2_plus_g1_minus_16)

	EX_ST(STORE_INIT(%o3, %o0 + 0x18), NG_ret_i2_plus_g1_minus_24)



	EX_LD(LOAD_TWIN(%i1 + %o7, %o2, %o3))

	EX_LD(LOAD_TWIN(%i1 + %o7, %o2, %o3), NG_ret_i2_plus_g1_minus_32)

	MIX_THREE_WORDS(%g2, %g3, %o2, %i5, GLOBAL_SPARE, %o1)



	EX_ST(STORE_INIT(%g2, %o0 + 0x20))

	EX_ST(STORE_INIT(%g3, %o0 + 0x28))

	EX_ST(STORE_INIT(%g2, %o0 + 0x20), NG_ret_i2_plus_g1_minus_32)

	EX_ST(STORE_INIT(%g3, %o0 + 0x28), NG_ret_i2_plus_g1_minus_40)



	EX_LD(LOAD_TWIN(%i1 + %i3, %g2, %g3))

	EX_LD(LOAD_TWIN(%i1 + %i3, %g2, %g3), NG_ret_i2_plus_g1_minus_48)

	add		%i1, 64, %i1

	MIX_THREE_WORDS(%o2, %o3, %g2, %i5, GLOBAL_SPARE, %o1)



	EX_ST(STORE_INIT(%o2, %o0 + 0x30))

	EX_ST(STORE_INIT(%o3, %o0 + 0x38))

	EX_ST(STORE_INIT(%o2, %o0 + 0x30), NG_ret_i2_plus_g1_minus_48)

	EX_ST(STORE_INIT(%o3, %o0 + 0x38), NG_ret_i2_plus_g1_minus_56)



	subcc		%g1, 64, %g1

	bne,pt		%XCC, 8b
@@ -211,31 +294,31 @@ FUNC_NAME: /* %i0=dst, %i1=src, %i2=len */ 
	ba,pt		%XCC, 60f

	 add		%i1, %i4, %i1



9:	EX_LD(LOAD_TWIN(%i1 + %o4, %o2, %o3))

9:	EX_LD(LOAD_TWIN(%i1 + %o4, %o2, %o3), NG_ret_i2_plus_g1)

	MIX_THREE_WORDS(%g3, %o2, %o3, %i5, GLOBAL_SPARE, %o1)

	LOAD(prefetch, %i1 + %i3, #one_read)



	EX_ST(STORE_INIT(%g3, %o0 + 0x00))

	EX_ST(STORE_INIT(%o2, %o0 + 0x08))

	EX_ST(STORE_INIT(%g3, %o0 + 0x00), NG_ret_i2_plus_g1)

	EX_ST(STORE_INIT(%o2, %o0 + 0x08), NG_ret_i2_plus_g1_minus_8)



	EX_LD(LOAD_TWIN(%i1 + %o5, %g2, %g3))

	EX_LD(LOAD_TWIN(%i1 + %o5, %g2, %g3), NG_ret_i2_plus_g1_minus_16)

	MIX_THREE_WORDS(%o3, %g2, %g3, %i5, GLOBAL_SPARE, %o1)



	EX_ST(STORE_INIT(%o3, %o0 + 0x10))

	EX_ST(STORE_INIT(%g2, %o0 + 0x18))

	EX_ST(STORE_INIT(%o3, %o0 + 0x10), NG_ret_i2_plus_g1_minus_16)

	EX_ST(STORE_INIT(%g2, %o0 + 0x18), NG_ret_i2_plus_g1_minus_24)



	EX_LD(LOAD_TWIN(%i1 + %o7, %o2, %o3))

	EX_LD(LOAD_TWIN(%i1 + %o7, %o2, %o3), NG_ret_i2_plus_g1_minus_32)

	MIX_THREE_WORDS(%g3, %o2, %o3, %i5, GLOBAL_SPARE, %o1)



	EX_ST(STORE_INIT(%g3, %o0 + 0x20))

	EX_ST(STORE_INIT(%o2, %o0 + 0x28))

	EX_ST(STORE_INIT(%g3, %o0 + 0x20), NG_ret_i2_plus_g1_minus_32)

	EX_ST(STORE_INIT(%o2, %o0 + 0x28), NG_ret_i2_plus_g1_minus_40)



	EX_LD(LOAD_TWIN(%i1 + %i3, %g2, %g3))

	EX_LD(LOAD_TWIN(%i1 + %i3, %g2, %g3), NG_ret_i2_plus_g1_minus_48)

	add		%i1, 64, %i1

	MIX_THREE_WORDS(%o3, %g2, %g3, %i5, GLOBAL_SPARE, %o1)



	EX_ST(STORE_INIT(%o3, %o0 + 0x30))

	EX_ST(STORE_INIT(%g2, %o0 + 0x38))

	EX_ST(STORE_INIT(%o3, %o0 + 0x30), NG_ret_i2_plus_g1_minus_48)

	EX_ST(STORE_INIT(%g2, %o0 + 0x38), NG_ret_i2_plus_g1_minus_56)



	subcc		%g1, 64, %g1

	bne,pt		%XCC, 9b
@@ -249,25 +332,25 @@ FUNC_NAME: /* %i0=dst, %i1=src, %i2=len */ 
	 * one twin load ahead, then add 8 back into source when

	 * we finish the loop.

	 */

	EX_LD(LOAD_TWIN(%i1, %o4, %o5))

	EX_LD(LOAD_TWIN(%i1, %o4, %o5), NG_ret_i2_plus_g1)

	mov	16, %o7

	mov	32, %g2

	mov	48, %g3

	mov	64, %o1

1:	EX_LD(LOAD_TWIN(%i1 + %o7, %o2, %o3))

1:	EX_LD(LOAD_TWIN(%i1 + %o7, %o2, %o3), NG_ret_i2_plus_g1)

	LOAD(prefetch, %i1 + %o1, #one_read)

	EX_ST(STORE_INIT(%o5, %o0 + 0x00))	! initializes cache line

	EX_ST(STORE_INIT(%o2, %o0 + 0x08))

	EX_LD(LOAD_TWIN(%i1 + %g2, %o4, %o5))

	EX_ST(STORE_INIT(%o3, %o0 + 0x10))

	EX_ST(STORE_INIT(%o4, %o0 + 0x18))

	EX_LD(LOAD_TWIN(%i1 + %g3, %o2, %o3))

	EX_ST(STORE_INIT(%o5, %o0 + 0x20))

	EX_ST(STORE_INIT(%o2, %o0 + 0x28))

	EX_LD(LOAD_TWIN(%i1 + %o1, %o4, %o5))

	EX_ST(STORE_INIT(%o5, %o0 + 0x00), NG_ret_i2_plus_g1)	! initializes cache line

	EX_ST(STORE_INIT(%o2, %o0 + 0x08), NG_ret_i2_plus_g1_minus_8)

	EX_LD(LOAD_TWIN(%i1 + %g2, %o4, %o5), NG_ret_i2_plus_g1_minus_16)

	EX_ST(STORE_INIT(%o3, %o0 + 0x10), NG_ret_i2_plus_g1_minus_16)

	EX_ST(STORE_INIT(%o4, %o0 + 0x18), NG_ret_i2_plus_g1_minus_24)

	EX_LD(LOAD_TWIN(%i1 + %g3, %o2, %o3), NG_ret_i2_plus_g1_minus_32)

	EX_ST(STORE_INIT(%o5, %o0 + 0x20), NG_ret_i2_plus_g1_minus_32)

	EX_ST(STORE_INIT(%o2, %o0 + 0x28), NG_ret_i2_plus_g1_minus_40)

	EX_LD(LOAD_TWIN(%i1 + %o1, %o4, %o5), NG_ret_i2_plus_g1_minus_48)

	add		%i1, 64, %i1

	EX_ST(STORE_INIT(%o3, %o0 + 0x30))

	EX_ST(STORE_INIT(%o4, %o0 + 0x38))

	EX_ST(STORE_INIT(%o3, %o0 + 0x30), NG_ret_i2_plus_g1_minus_48)

	EX_ST(STORE_INIT(%o4, %o0 + 0x38), NG_ret_i2_plus_g1_minus_56)

	subcc		%g1, 64, %g1

	bne,pt		%XCC, 1b

	 add		%o0, 64, %o0
@@ -282,20 +365,20 @@ FUNC_NAME: /* %i0=dst, %i1=src, %i2=len */ 
	mov	32, %g2

	mov	48, %g3

	mov	64, %o1

1:	EX_LD(LOAD_TWIN(%i1 + %g0, %o4, %o5))

	EX_LD(LOAD_TWIN(%i1 + %o7, %o2, %o3))

1:	EX_LD(LOAD_TWIN(%i1 + %g0, %o4, %o5), NG_ret_i2_plus_g1)

	EX_LD(LOAD_TWIN(%i1 + %o7, %o2, %o3), NG_ret_i2_plus_g1)

	LOAD(prefetch, %i1 + %o1, #one_read)

	EX_ST(STORE_INIT(%o4, %o0 + 0x00))	! initializes cache line

	EX_ST(STORE_INIT(%o5, %o0 + 0x08))

	EX_LD(LOAD_TWIN(%i1 + %g2, %o4, %o5))

	EX_ST(STORE_INIT(%o2, %o0 + 0x10))

	EX_ST(STORE_INIT(%o3, %o0 + 0x18))

	EX_LD(LOAD_TWIN(%i1 + %g3, %o2, %o3))

	EX_ST(STORE_INIT(%o4, %o0 + 0x00), NG_ret_i2_plus_g1)	! initializes cache line

	EX_ST(STORE_INIT(%o5, %o0 + 0x08), NG_ret_i2_plus_g1_minus_8)

	EX_LD(LOAD_TWIN(%i1 + %g2, %o4, %o5), NG_ret_i2_plus_g1_minus_16)

	EX_ST(STORE_INIT(%o2, %o0 + 0x10), NG_ret_i2_plus_g1_minus_16)

	EX_ST(STORE_INIT(%o3, %o0 + 0x18), NG_ret_i2_plus_g1_minus_24)

	EX_LD(LOAD_TWIN(%i1 + %g3, %o2, %o3), NG_ret_i2_plus_g1_minus_32)

	add	%i1, 64, %i1

	EX_ST(STORE_INIT(%o4, %o0 + 0x20))

	EX_ST(STORE_INIT(%o5, %o0 + 0x28))

	EX_ST(STORE_INIT(%o2, %o0 + 0x30))

	EX_ST(STORE_INIT(%o3, %o0 + 0x38))

	EX_ST(STORE_INIT(%o4, %o0 + 0x20), NG_ret_i2_plus_g1_minus_32)

	EX_ST(STORE_INIT(%o5, %o0 + 0x28), NG_ret_i2_plus_g1_minus_40)

	EX_ST(STORE_INIT(%o2, %o0 + 0x30), NG_ret_i2_plus_g1_minus_48)

	EX_ST(STORE_INIT(%o3, %o0 + 0x38), NG_ret_i2_plus_g1_minus_56)

	subcc	%g1, 64, %g1

	bne,pt	%XCC, 1b

	 add	%o0, 64, %o0
@@ -321,28 +404,28 @@ FUNC_NAME: /* %i0=dst, %i1=src, %i2=len */ 
	andn		%i2, 0xf, %i4

	and		%i2, 0xf, %i2

1:	subcc		%i4, 0x10, %i4

	EX_LD(LOAD(ldx, %i1, %o4))

	EX_LD(LOAD(ldx, %i1, %o4), NG_ret_i2_plus_i4)

	add		%i1, 0x08, %i1

	EX_LD(LOAD(ldx, %i1, %g1))

	EX_LD(LOAD(ldx, %i1, %g1), NG_ret_i2_plus_i4)

	sub		%i1, 0x08, %i1

	EX_ST(STORE(stx, %o4, %i1 + %i3))

	EX_ST(STORE(stx, %o4, %i1 + %i3), NG_ret_i2_plus_i4)

	add		%i1, 0x8, %i1

	EX_ST(STORE(stx, %g1, %i1 + %i3))

	EX_ST(STORE(stx, %g1, %i1 + %i3), NG_ret_i2_plus_i4_minus_8)

	bgu,pt		%XCC, 1b

	 add		%i1, 0x8, %i1

73:	andcc		%i2, 0x8, %g0

	be,pt		%XCC, 1f

	 nop

	sub		%i2, 0x8, %i2

	EX_LD(LOAD(ldx, %i1, %o4))

	EX_ST(STORE(stx, %o4, %i1 + %i3))

	EX_LD(LOAD(ldx, %i1, %o4), NG_ret_i2_plus_8)

	EX_ST(STORE(stx, %o4, %i1 + %i3), NG_ret_i2_plus_8)

	add		%i1, 0x8, %i1

1:	andcc		%i2, 0x4, %g0

	be,pt		%XCC, 1f

	 nop

	sub		%i2, 0x4, %i2

	EX_LD(LOAD(lduw, %i1, %i5))

	EX_ST(STORE(stw, %i5, %i1 + %i3))

	EX_LD(LOAD(lduw, %i1, %i5), NG_ret_i2_plus_4)

	EX_ST(STORE(stw, %i5, %i1 + %i3), NG_ret_i2_plus_4)

	add		%i1, 0x4, %i1

1:	cmp		%i2, 0

	be,pt		%XCC, 85f
@@ -358,8 +441,8 @@ FUNC_NAME: /* %i0=dst, %i1=src, %i2=len */ 
	sub		%i2, %g1, %i2



1:	subcc		%g1, 1, %g1

	EX_LD(LOAD(ldub, %i1, %i5))

	EX_ST(STORE(stb, %i5, %i1 + %i3))

	EX_LD(LOAD(ldub, %i1, %i5), NG_ret_i2_plus_g1_plus_1)

	EX_ST(STORE(stb, %i5, %i1 + %i3), NG_ret_i2_plus_g1_plus_1)

	bgu,pt		%icc, 1b

	 add		%i1, 1, %i1
@@ -375,16 +458,16 @@ FUNC_NAME: /* %i0=dst, %i1=src, %i2=len */ 


8:	mov		64, %i3

	andn		%i1, 0x7, %i1

	EX_LD(LOAD(ldx, %i1, %g2))

	EX_LD(LOAD(ldx, %i1, %g2), NG_ret_i2)

	sub		%i3, %g1, %i3

	andn		%i2, 0x7, %i4

	sllx		%g2, %g1, %g2

1:	add		%i1, 0x8, %i1

	EX_LD(LOAD(ldx, %i1, %g3))

	EX_LD(LOAD(ldx, %i1, %g3), NG_ret_i2_and_7_plus_i4)

	subcc		%i4, 0x8, %i4

	srlx		%g3, %i3, %i5

	or		%i5, %g2, %i5

	EX_ST(STORE(stx, %i5, %o0))

	EX_ST(STORE(stx, %i5, %o0), NG_ret_i2_and_7_plus_i4)

	add		%o0, 0x8, %o0

	bgu,pt		%icc, 1b

	 sllx		%g3, %g1, %g2
@@ -404,8 +487,8 @@ FUNC_NAME: /* %i0=dst, %i1=src, %i2=len */ 


1:

	subcc		%i2, 4, %i2

	EX_LD(LOAD(lduw, %i1, %g1))

	EX_ST(STORE(stw, %g1, %i1 + %i3))

	EX_LD(LOAD(lduw, %i1, %g1), NG_ret_i2_plus_4)

	EX_ST(STORE(stw, %g1, %i1 + %i3), NG_ret_i2_plus_4)

	bgu,pt		%XCC, 1b

	 add		%i1, 4, %i1
@@ -415,8 +498,8 @@ FUNC_NAME: /* %i0=dst, %i1=src, %i2=len */ 
	.align		32

90:

	subcc		%i2, 1, %i2

	EX_LD(LOAD(ldub, %i1, %g1))

	EX_ST(STORE(stb, %g1, %i1 + %i3))

	EX_LD(LOAD(ldub, %i1, %g1), NG_ret_i2_plus_1)

	EX_ST(STORE(stb, %g1, %i1 + %i3), NG_ret_i2_plus_1)

	bgu,pt		%XCC, 90b

	 add		%i1, 1, %i1

	ret