diff options
Diffstat (limited to 'examples/demos/n00bdemo/plasmagen.S')
| -rw-r--r-- | examples/demos/n00bdemo/plasmagen.S | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/examples/demos/n00bdemo/plasmagen.S b/examples/demos/n00bdemo/plasmagen.S new file mode 100644 index 0000000..07b3f48 --- /dev/null +++ b/examples/demos/n00bdemo/plasmagen.S @@ -0,0 +1,181 @@ +.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
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