Created
June 18, 2016 22:39
-
-
Save simias/8929e113ce7f295ebb8030f09a8eea06 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* void load_blob(unsigned *load_addr, unsigned *blob, unsigned len_words) | |
* | |
* Load `len_words` 32bit words from `blob` and store them at `load_addr` | |
*/ | |
.type load_blob, function | |
load_blob: | |
addiu $sp, -24 | |
sw $ra, 20($sp) | |
sw $fp, 16($sp) | |
move $fp, $sp | |
/* Early exit if theres nothing to load */ | |
beqz $a2, 2f | |
/* Compute end address */ | |
addiu $t0, $a1, $a2 | |
1: /* Blob copy loop */ | |
lw $t1, 0($a1) | |
addiu $a1, 4 | |
sw $t1, 0($a0) | |
bne $a1, $t0, 1b | |
addiu $a0, 4 | |
2: /* Setup return stub right after the code */ | |
la $t0, return_stub | |
la $t1, return_stub_end | |
3: /* Stub copy loop */ | |
lw $t2, 0($t0) | |
addiu $t0, 4 | |
sw $t2, 0($a0) | |
bne $t0, $t1, 3b | |
addiu $a0, 4 | |
move $sp, $fp | |
lw $ra, 20($sp) | |
lw $fp, 16($sp) | |
jr $ra | |
addiu $sp, 24 | |
/* Stub code to return to main once the test has run. Copied at the | |
* end of the test. */ | |
return_stub: | |
j post_test | |
nop | |
return_stub_end: . |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment