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psp code updated for latest base, black level

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@415 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2008-04-05 19:51:49 +00:00
parent 6c25471008
commit 6fc5714482
14 changed files with 367 additions and 180 deletions
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21
platform/psp/asm_utils.s
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@ -14,7 +14,7 @@
.byte 0, 2, 7, 12, 16, 21, 26, 31 # -3
.byte 0, 3, 7, 12, 17, 22, 26, 31 # -2
.byte 0, 4, 8, 13, 17, 22, 26, 31 # -1
gmtab:
pal_gmtab:
.byte 0, 5, 10, 15, 16, 21, 26, 31 # 0
.byte 0, 6, 10, 15, 19, 23, 27, 31
.byte 0, 7, 11, 15, 19, 23, 27, 31
@ -38,11 +38,13 @@ gmtab:
# bbbb bggg gggr rrrr
.global do_pal_convert # dest, src, gammaa_val
#.global pal_gmtab
.global do_pal_convert # dest, src, gammaa_val, black_lvl
do_pal_convert:
bnez $a2, dpc_gma
li $t0, 64/2
bnez $a3, dpc_gma
lui $t2, 0x00e
ori $t2, 0x00e
lui $t3, 0x006
@ -80,11 +82,22 @@ dpc_loop:
jr $ra
nop
# non-zero gamma
dpc_gma:
slt $t2, $a2, $0
sll $a2, 3
lui $t1, %hi(gmtab)
addiu $t1, %lo(gmtab)
lui $t1, %hi(pal_gmtab)
addiu $t1, %lo(pal_gmtab)
addu $a2, $t1
beqz $a3, dpc_gma_loop
sb $0, 0($a2) # black level 0
bnez $t2, dpc_gma_loop # gamma < 0, keep black at 0
addiu $a3, -2
slt $t2, $a3, $0 # t2 = a3_orig == 1 ? 1 : 0
lb $t1, 1($a2)
addiu $t1, -2
srlv $t1, $t1, $t2
sb $t1, 0($a2)
dpc_gma_loop:
lw $v0, 0($a1)