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microblaze: Speedup code copy

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Remove one instruction in the loop which speedup
code copying.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Michal Simek 2015-01-27 15:10:37 +01:00
parent e945f6dc28
commit 7c4dd54255
1 changed files with 7 additions and 5 deletions
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12
arch/microblaze/cpu/start.S
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@ -212,12 +212,14 @@ relocate_code:
/* Relocate text and data - r12 temp value */ /* Relocate text and data - r12 temp value */
addi r21, r0, _start addi r21, r0, _start
addi r22, r0, __end - 4 /* Include BSS too */ addi r22, r0, __end - 4 /* Include BSS too */
1: lwi r12, r21, 0 /* Load u-boot data */
swi r12, r23, 0 /* Write zero to loc */ rsub r6, r21, r22
addi r21, r21, 4 /* Increment to next loc - origin code */ or r5, r0, r0
cmp r12, r21, r22 /* Check if we have reach the end */ 1: lw r12, r21, r5 /* Load u-boot data */
sw r12, r23, r5 /* Write zero to loc */
cmp r12, r5, r6 /* Check if we have reach the end */
bneid r12, 1b bneid r12, 1b
addi r23, r23, 4 /* Increment to next loc - relocate code */ addi r5, r5, 4 /* Increment to next loc - relocate code */
/* R23 points to the base address. */ /* R23 points to the base address. */
add r23, r0, r7 /* Move reloc addr to r23 */ add r23, r0, r7 /* Move reloc addr to r23 */