u-boot mem compare function diff

1r_cmp.S

.Lquad_loop_s:
	NOP;
	R0 = [P0++];
	R1 = [I0++];
	CC = R0 == R1;
	IF !CC JUMP .Lquad_different;

2t_cmp.S

.Lquad_loop_s:
#if ANOMALY_05000202
	R0 = [P0++];
	R1 = [I0++];
#else
	MNOP || R0 = [P0++] || R1 = [I0++];
#endif
	CC = R0 == R1;
	IF !CC JUMP .Lquad_different;

renesas.S

.align 2


.globl _memcmp;
.type _memcmp, STT_FUNC;
_memcmp:
	I1 = P3;
	P0 = R0;			/* P0 = s1 address */
	P3 = R1;			/* P3 = s2 Address  */
	P2 = R2 ;			/* P2 = count */
	CC = R2 <= 7(IU);
	IF CC JUMP .Ltoo_small;
	I0 = R1;			/* s2 */
	R1 = R1 | R0;		/* OR addresses together */
	R1 <<= 30;		/* check bottom two bits */
	CC =  AZ;			/* AZ set if zero. */
	IF !CC JUMP .Lbytes ;	/* Jump if addrs not aligned. */

	P1 = P2 >> 2;		/* count = n/4 */
	R3 =  3;
	R2 = R2 & R3;		/* remainder */
	P2 = R2;			/* set remainder */

	LSETUP (.Lquad_loop_s, .Lquad_loop_e) LC0=P1;
.Lquad_loop_s:
	NOP;
	R0 = [P0++];
	R1 = [I0++];
	CC = R0 == R1;
	IF !CC JUMP .Lquad_different;
.Lquad_loop_e:
	NOP;

	P3 = I0;			/* s2 */
.Ltoo_small:
	CC = P2 == 0;		/* Check zero count*/
	IF CC JUMP .Lfinished;	/* very unlikely*/

.Lbytes:
	LSETUP (.Lbyte_loop_s, .Lbyte_loop_e) LC0=P2;
.Lbyte_loop_s:
	R1 = B[P3++](Z);	/* *s2 */
	R0 = B[P0++](Z);	/* *s1 */
	CC = R0 == R1;
	IF !CC JUMP .Ldifferent;
.Lbyte_loop_e:
	NOP;

.Ldifferent:
	R0 = R0 - R1;
	P3 = I1;
	RTS;

.Lquad_different:
	P0 += -4;		/* back up to the start of the */
	P3 = I0;		/* quads, and increase the*/
	P2 += 4;		/* remainder count*/
	P3 += -4;
	JUMP .Lbytes;

.Lfinished:
	R0 = 0;
	P3 = I1;
	RTS;

.size _memcmp, .-_memcmp

torvalds.S

#include <linux/linkage.h>

.text

.align 2

ENTRY(_memcmp)
	I1 = P3;
	P0 = R0;			/* P0 = s1 address */
	P3 = R1;			/* P3 = s2 Address  */
	P2 = R2 ;			/* P2 = count */
	CC = R2 <= 7(IU);
	IF CC JUMP .Ltoo_small;
	I0 = R1;			/* s2 */
	R1 = R1 | R0;		/* OR addresses together */
	R1 <<= 30;		/* check bottom two bits */
	CC =  AZ;			/* AZ set if zero. */
	IF !CC JUMP .Lbytes ;	/* Jump if addrs not aligned. */

	P1 = P2 >> 2;		/* count = n/4 */
	R3 =  3;
	R2 = R2 & R3;		/* remainder */
	P2 = R2;			/* set remainder */

	LSETUP (.Lquad_loop_s, .Lquad_loop_e) LC0=P1;
.Lquad_loop_s:
#if ANOMALY_05000202
	R0 = [P0++];
	R1 = [I0++];
#else
	MNOP || R0 = [P0++] || R1 = [I0++];
#endif
	CC = R0 == R1;
	IF !CC JUMP .Lquad_different;
.Lquad_loop_e:
	NOP;

	P3 = I0;			/* s2 */
.Ltoo_small:
	CC = P2 == 0;		/* Check zero count*/
	IF CC JUMP .Lfinished;	/* very unlikely*/

.Lbytes:
	LSETUP (.Lbyte_loop_s, .Lbyte_loop_e) LC0=P2;
.Lbyte_loop_s:
	R1 = B[P3++](Z);	/* *s2 */
	R0 = B[P0++](Z);	/* *s1 */
	CC = R0 == R1;
	IF !CC JUMP .Ldifferent;
.Lbyte_loop_e:
	NOP;

.Ldifferent:
	R0 = R0 - R1;
	P3 = I1;
	RTS;

.Lquad_different:
	P0 += -4;		/* back up to the start of the */
	P3 = I0;		/* quads, and increase the*/
	P2 += 4;		/* remainder count*/
	P3 += -4;
	JUMP .Lbytes;

.Lfinished:
	R0 = 0;
	P3 = I1;
	RTS;

ENDPROC(_memcmp)