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|
.set noreorder
.set POLYG4_tag, 0
.set POLYG4_rgb0, 4
.set POLYG4_xy0, 8
.set POLYG4_rgb1, 12
.set POLYG4_xy1, 16
.set POLYG4_rgb2, 20
.set POLYG4_xy2, 24
.set POLYG4_rgb3, 28
.set POLYG4_xy3, 32
.set POLYG4_len, 36
# a0 - Plasma output
# a1 - Counter
.global genPlasma
.type genPlasma, @function
genPlasma:
move $t1, $0
.gn_y_loop: move $t0, $0
.gn_x_loop: la $v0, plasma_sin1
sll $v1, $t0, 1
addu $v1, $v0
lh $v0, 0($v1)
la $a2, plasma_sin2
sll $v1, $t1, 1
addu $v1, $a2
lh $v1, 0($v1)
nop
add $v0, $v1
add $v1, $t0, $t1
add $v1, $a1
divu $v1, 90
la $a2, plasma_sin3
mfhi $v1
sll $v1, 1
addu $v1, $a2
lh $v1, 0($v1)
nop
add $v0, $v1
andi $v0, 0xff
sb $v0, 0($a0)
addu $a0, 1
addiu $t0, 1
blt $t0, 41, .gn_x_loop
nop
addiu $t1, 1
blt $t1, 31, .gn_y_loop
nop
jr $ra
nop
# a0 - OT entry
# a1 - Primitive address
# a2 - Plasma map source
.global sortPlasma
.type sortPlasma, @function
sortPlasma:
move $t1, $0
.y_loop:
move $t0, $0
.x_loop:
lbu $v0, 0($a2)
addiu $a2, 1
la $a3, plasma_colors
sll $v0, 2
addu $v0, $a3
lw $v0, 0($v0)
lui $v1, 0x3800
or $v0, $v1
sw $v0, POLYG4_rgb0($a1)
lbu $v0, 0($a2)
nop
sll $v0, 2
addu $v0, $a3
lw $v0, 0($v0)
nop
sw $v0, POLYG4_rgb1($a1)
lbu $v0, 40($a2)
nop
sll $v0, 2
addu $v0, $a3
lw $v0, 0($v0)
nop
sw $v0, POLYG4_rgb2($a1)
lbu $v0, 41($a2)
nop
sll $v0, 2
addu $v0, $a3
lw $v0, 0($v0)
nop
sw $v0, POLYG4_rgb3($a1)
sll $v0, $t0, 4
andi $v0, 0xffff
sll $v1, $t1, 20
or $v0, $v1
sw $v0, POLYG4_xy0($a1)
sll $v0, $t0, 4
andi $v0, 0xffff
addi $v0, 16
sll $v1, $t1, 20
or $v0, $v1
sw $v0, POLYG4_xy1($a1)
sll $v0, $t0, 4
andi $v0, 0xffff
sll $v1, $t1, 4
addi $v1, 16
sll $v1, 16
or $v0, $v1
sw $v0, POLYG4_xy2($a1)
sll $v0, $t0, 4
andi $v0, 0xffff
addi $v0, 16
sll $v1, $t1, 4
addi $v1, 16
sll $v1, 16
or $v0, $v1
sw $v0, POLYG4_xy3($a1)
.set noat
lui $v1, 0x0800
lw $v0, 0($a0)
lui $at, 0xff00
and $v1, $at
lui $at, 0x00ff
or $at, 0xffff
and $v0, $at
or $v1, $v0
sw $v1, 0($a1)
lw $v0, 0($a0)
and $a1, $at
lui $at, 0xff00
and $v0, $at
or $v0, $a1
sw $v0, 0($a0)
.set at
lui $v0, 0x8000
or $a1, $v0
addiu $a1, POLYG4_len
addiu $t0, 1
blt $t0, 40, .x_loop
nop
addiu $a2, 1
addiu $t1, 1
blt $t1, 30, .y_loop
nop
jr $ra
move $v0, $a1
|
