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| author | John Wilbert M. Villamor <lameguy64@gmail.com> | 2019-06-23 07:42:16 +0800 |
|---|---|---|
| committer | John Wilbert M. Villamor <lameguy64@gmail.com> | 2019-06-23 07:42:16 +0800 |
| commit | 7be9178c0f9b0e698a305ecc5c0c41fcc596a4fc (patch) | |
| tree | e98c627e1da5c764563774b89b0c06d7ac5ad0a4 /libpsn00b/libc/malloc.s | |
| parent | ae9e545c3ed33d39ce21ae13ceb8337fa34901b8 (diff) | |
| download | psn00bsdk-7be9178c0f9b0e698a305ecc5c0c41fcc596a4fc.tar.gz | |
LibPSn00b officially v0.10b, added psxsio library, better DrawSync() and VSync(), better reference manual.
Diffstat (limited to 'libpsn00b/libc/malloc.s')
| -rw-r--r-- | libpsn00b/libc/malloc.s | 46 |
1 files changed, 26 insertions, 20 deletions
diff --git a/libpsn00b/libc/malloc.s b/libpsn00b/libc/malloc.s index 20e5371..fdb196d 100644 --- a/libpsn00b/libc/malloc.s +++ b/libpsn00b/libc/malloc.s @@ -52,7 +52,7 @@ malloc: lw $a2, 0($a2) sll $a0, 2 -.find_next: +.Lfind_next: move $a1, $a2 @@ -61,16 +61,16 @@ malloc: subu $v0, $a2, $a1 # Compute space between current and next - beqz $v1, .empty_block # Occupy empty block (if size = 0) + beqz $v1, .Lempty_block # Occupy empty block (if size = 0) nop - beqz $a2, .new_block # Allocate a new block (if no next) + beqz $a2, .Lnew_block # Allocate a new block (if no next) nop addiu $v0, -(ND_HSIZ*2) # Compute remaining space of block subu $v0, $v1 - blt $v0, $a0, .find_next # Search for the next block if space is not big enough + blt $v0, $a0, .Lfind_next # Search for the next block if space is not big enough nop # Perform a block split using remaining space of current block @@ -88,19 +88,19 @@ malloc: jr $ra addiu $v0, ND_HSIZ -.empty_block: # Occupy an empty block +.Lempty_block: # Occupy an empty block - beqz $a2, .no_next # Skip size calculation if there's no next + beqz $a2, .Lno_next # Skip size calculation if there's no next nop addiu $v0, -ND_HSIZ - blt $v0, $a0, .find_next + blt $v0, $a0, .Lfind_next nop - b .skip_space_check + b .Lskip_space_check nop -.no_next: +.Lno_next: la $v1, _malloc_addr # Check if there's enough space for a block lw $v1, 0($v1) @@ -111,16 +111,16 @@ malloc: addu $v1, $a0 addiu $v1, ND_HSIZ - bgt $v1, $v0, .no_space + bgt $v1, $v0, .Lno_space nop -.skip_space_check: +.Lskip_space_check: sw $a0, ND_SIZE($a1) jr $ra # Return address addiu $v0, $a1, ND_HSIZ -.new_block: # Create a new block +.Lnew_block: # Create a new block addu $a2, $a1, $v1 # Compute address for new block addiu $a2, ND_HSIZ @@ -134,7 +134,7 @@ malloc: addu $v1, $a0 addiu $v1, ND_HSIZ - bgt $v1, $v0, .no_space # Reject if it exceeds specified size + bgt $v1, $v0, .Lno_space # Reject if it exceeds specified size nop sw $a1, ND_PREV($a2) @@ -146,7 +146,8 @@ malloc: jr $ra # Return address addiu $v0, $a2, ND_HSIZ -.no_space: # Return a null if no space can be found +.Lno_space: # Return a null if no space can be found + jr $ra move $v0, $0 @@ -168,10 +169,12 @@ calloc: move $a0, $v0 mflo $a1 -.clear_loop: + +.Lclear_loop: + sw $0 , 0($a0) addi $a1, 4 - bgtz $a1, .clear_loop + bgtz $a1, .Lclear_loop addiu $a0, 4 lw $ra, 0($sp) @@ -191,10 +194,10 @@ free: lw $a1, ND_PREV($a0) lw $a2, ND_NEXT($a0) - beqz $a1, .is_start # Check if block is a starting block + beqz $a1, .Lis_start # Check if block is a starting block nop - beqz $a2, .is_end + beqz $a2, .Lis_end nop # Unlink @@ -203,10 +206,13 @@ free: jr $ra sw $a1, ND_PREV($a2) -.is_end: # Unlinks the ending block +.Lis_end: # Unlinks the ending block + jr $ra sw $0 , ND_NEXT($a1) -.is_start: # Simply set size to 0 if starting block + +.Lis_start: # Simply set size to 0 if starting block + jr $ra sw $0 , ND_SIZE($a0) |