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sm64/rsp/fast3d.s

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2020-06-02 12:44:34 -04:00
.rsp
.include "rsp/rsp_defs.inc"
.include "rsp/gbi.inc"
// This file assumes DATA_FILE and CODE_FILE are set on the command line
.if version() < 110
.error "armips 0.11 or newer is required"
.endif
// Overlay table data member offsets
overlay_load equ 0x0000
overlay_len equ 0x0004
overlay_imem equ 0x0006
.macro OverlayEntry, loadStart, loadEnd, imemAddr
.dw loadStart
.dh (loadEnd - loadStart - 1) & 0xFFFF
.dh (imemAddr) & 0xFFFF
.endmacro
.macro jumpTableEntry, addr
.dh addr & 0xFFFF
.endmacro
// RSP DMEM
.create DATA_FILE, 0x0000
// 0x0000-0x0027: Overlay Table
overlayInfo0:
OverlayEntry orga(Overlay0Address), orga(Overlay0End), Overlay0Address
overlayInfo1:
OverlayEntry orga(Overlay1Address), orga(Overlay1End), Overlay1Address
overlayInfo2:
OverlayEntry orga(Overlay2Address), orga(Overlay2End), Overlay2Address
overlayInfo3:
OverlayEntry orga(Overlay3Address), orga(Overlay3End), Overlay3Address
overlayInfo4:
OverlayEntry orga(Overlay4Address), orga(Overlay4End), Overlay4Address
// 0x0028-0x009F: ??
.dw 0x0FFAF006
.dw 0x7FFF0000
.dw 0x00000001
.dw 0x0002FFFF
.dw 0x40000004
.dw 0x06330200
.dw 0x7FFFFFF8
.dw 0x00080040
.dw 0x00208000
.dw 0x01CCCCCC
.dw 0x0001FFFF
.dw 0x00010001
.dw 0x0001FFFF
.dw 0x00010001
.dw 0x00020002
.dw 0x00020002
// 0x0068
.dw 0x00020002
.dw 0x00020002
data0070:
.dw 0x00010000
// 0x0074
.dh 0x0000
// 0x0076
.dh 0x0001
// 0x0078
.dw 0x00000001
.dw 0x00000001
.dw 0x00010000
.dw 0x0000FFFF
.dw 0x00000001
.dw 0x0000FFFF
.dw 0x00000000
.dw 0x0001FFFF
.dw 0x00000000
.dw 0x00010001
// 0x00A0-0x00A1
lightEntry:
jumpTableEntry load_lighting
// 0x00A2-0x00A3: ??
.dh 0x7FFF
// 0x00A4-0x00B3: ??
.dw 0x571D3A0C
.dw 0x00010002
.dw 0x01000200
.dw 0x40000040
// 0x00B4
.dh 0x0000
// 0x00B6-0x00B7
taskDoneEntry:
jumpTableEntry overlay_4_entry
// 0x00B8
lower24Mask:
.dw 0x00FFFFFF
// 0x00BC: Operation Types
operationJumpTable:
jumpTableEntry dispatch_dma // cmds 0x00-0x3f
spNoopEntry:
jumpTableEntry SP_NOOP // cmds 0x40-0x7f
jumpTableEntry dispatch_imm // cmds 0x80-0xbf
jumpTableEntry dispatch_rdp // cmds 0xc0-0xff
// 0x00C4: DMA operations
dmaJumpTable:
jumpTableEntry SP_NOOP // 0x00
jumpTableEntry dma_MTX // 0x01
jumpTableEntry SP_NOOP // 0x02
jumpTableEntry dma_MOVEMEM // 0x03
jumpTableEntry dma_VTX // 0x04
jumpTableEntry SP_NOOP // 0x05
jumpTableEntry dma_DL // 0x06
jumpTableEntry SP_NOOP // 0x07
jumpTableEntry SP_NOOP // 0x08
jumpTableEntry SP_NOOP // 0x09
// 0x00D8: Immediate operations
immediateJumpTableBase equ (immediateJumpTable - ((0xB2 << 1) & 0xFE))
.ifdef F3D_OLD
jumpTableEntry imm_UNKNOWN
.endif
immediateJumpTable:
jumpTableEntry imm_RDPHALF_CONT // 0xB2
jumpTableEntry imm_RDPHALF_2 // 0xB3
jumpTableEntry imm_RDPHALF_1 // 0xB4
jumpTableEntry SP_NOOP // 0xB5?
jumpTableEntry imm_CLEARGEOMETRYMODE // 0xB6
jumpTableEntry imm_SETGEOMETRYMODE // 0xB7
jumpTableEntry imm_ENDDL // 0xB8
jumpTableEntry imm_SETOTHERMODE_L // 0xB9
jumpTableEntry imm_SETOTHERMODE_H // 0xBA
jumpTableEntry imm_TEXTURE // 0xBB
jumpTableEntry imm_MOVEWORD // 0xBC
jumpTableEntry imm_POPMTX // 0xBD
jumpTableEntry imm_CULLDL // 0xBE
jumpTableEntry imm_TRI1 // 0xBF
// 0x00F6: Label constants
labelLUT:
jumpTableEntry found_in
foundOutEntry:
jumpTableEntry found_out
jumpTableEntry found_first_in
jumpTableEntry found_first_out
clipDrawEntry:
jumpTableEntry clip_draw_loop
performClipEntry:
jumpTableEntry perform_clip
nextClipEntry:
jumpTableEntry next_clip
DMAWaitEntry:
jumpTableEntry dma_wait_dl
// 0x0106: ??
data0106:
.dh 0x0000
.ifdef F3D_NEW
.dh 0x0000
.endif
// 0x0108: DRAM pointer
dramPtr:
.dw 0x00000000
.dh 0x0000 // 0x10C: RDPHALF_2
.dh 0x0000
// 0x110: display list stack size
displayListStackSize:
.dh 0x0000
.dh 0xFFFF // 0x112: RDPHALF_1
.dw 0x00000000 // 0x114: geometrymode (bit 1 is texture ON)
.dw 0xEF080CFF // 0x118: othermode
.dw 0x00000000
.dw 0x00000000 // 0x120: texture max mipmap levels, tile descriptor enable/disable
.dh 0x0000 // 0x124: texture scaling factor S axis (horizontal) U16 fraction
.dh 0x0000 // 0x126: texture scaling factor T axis (vertical)
.dw 0x00000000 // 0x128: some dpc dma address state
numLights:
.dw 0x80000040 // 0x12c: num lights, bit 31 = needs init, bits 11:0 = (num_lights+1)*32
.dw 0x00000000 // 0x130: dram stack pointer 1
.dw 0x00000000 // 0x134: dram stack pointer modelview matrices
data0138:
.dw 0x40004000 // 0x138: txtatt (unused?)
.dw 0x00000000
.dw 0x00000000
.dw 0x00000000
.dw 0x00000000
.dw 0x00000000
.dw 0x00000000 // 0x150: output buffer
.dw 0x00000000 // 0x154: output buffer size
data0158:
.dh 0x0000 // 0x158: ??
.dh 0x0000
.dw 0x00000000 // 0x15c: dram stack end?
// 0x160-0x19f: RSP memory segment table
segmentTable:
.fill 0x40, 0
// 0x1a0: Lights
.dw 0x80000000
.dw 0x80000000
.dw 0x00000000
.dw 0x00000000
lookAtY: // 0x1b0: lookaty
.dw 0x00800000, 0x00800000, 0x7F000000, 0x00000000
.dw 0x00000000, 0x00000000, 0x00000000, 0x00000000
lookAtX: // 0x1d0: lookatx
.dw 0x00000000, 0x00000000, 0x007F0000, 0x00000000
.dw 0x00000000, 0x00000000, 0x00000000, 0x00000000
// 0x1f0: L0..L7 light info (32 bytes each)
lightInfo0: // 0x1f0
.dw 0x00000000, 0x00000000, 0x00000000, 0x00000000
.dw 0x00000000, 0x00000000, 0xE0011FFF, 0x00040000
lightInfo1: // 0x210
.dw 0xFF000000, 0xFF000000, 0x00000000, 0x00000000
.dw 0x00000000, 0x00000000, 0x00000000, 0x00000000
lightInfo2: // 0x230
.dw 0x00000000, 0x00000000, 0x00000000, 0x00000000
.dw 0x00000000, 0x00000000, 0x00000000, 0x00000000
lightInfo3: // 0x250
.dw 0x00000000, 0x00000000, 0x00000000, 0x00000000
.dw 0x00000000, 0x00000000, 0x00000000, 0x00000000
lightInfo4: // 0x270
// L4-L7 overlap with version string
.definelabel lightInfo5, lightInfo4 + 0x20 // 0x290
.definelabel lightInfo6, lightInfo5 + 0x20 // 0x2b0
.definelabel lightInfo7, lightInfo6 + 0x20 // 0x2d0
.if defined(F3D_OLD) || defined(VERSION_EU)
.asciiz "RSP SW Version: 2.0D, 04-01-96"
.elseif defined(F3D_NEW)
.asciiz "RSP SW Version: 2.0H, 02-12-97"
.endif
.asciiz "SGI U64 GFX SW TEAM: S Anderson, S Carr, H Cheng, K Luster, R Moore, N Pooley, A Srinivasan", 0x0A
.dw 0x00000000
// 0x2f0-0x31f: DMEM table
dmemTableOffset equ (dmemTable - 0x80)
dmemTable:
.dh viewport, lookAtY, lookAtX, lightInfo0, lightInfo1, lightInfo2, lightInfo3, lightInfo4
.dh lightInfo5, lightInfo6, lightInfo7, data0138, mpMatrix+0x10, mpMatrix+0x20, mpMatrix+0x30, mpMatrix
.dh numLights, data0070, segmentTable, fogFactors, lightInfo0, pointsBuffer
.ifdef F3D_NEW
.dh displayListStackSize, 0x0000
.else
.dh 0x0000, 0x0000
.endif
// 0x320: Viewport (0x010 bytes)
viewport:
.dw 0x00000000, 0x00000000, 0x00000000, 0x00000000
// 0x330: fog factors (three 16-bit integers: mul, add, min)
fogFactors:
.dh 0x0100, 0x0000, 0x00FF
// 0x336: display list stack (return addresses)
displayListStack: // this is not 4-byte aligned
.fill 0x2a, 0
// 0x360-0x39f: Modelview matrix top of stack (0x40 bytes)
modelViewMatrixStack:
.fill 0x40, 0
// 0x3a0-0x3df Projection Matrix top of stack (0x40 bytes)
projectionMatrixStack:
.fill 0x40, 0
// 0x3e0-0x41f: MP matrix (Modelview * Projection)
mpMatrix:
.fill 0x40, 0
// 0x420: Points buffer (0x280 bytes)
pointsBuffer:
.fill 0x280, 0
// 0x6a0-0x7df: input display list buffer
inputDisplayList:
.fill 0x140, 0
// 0x7E0-0x7ff: input data
inputData:
.fill (0x800 - 0x7E0), 0
.close // DATA_FILE
// uninitialized variables
.definelabel setupTemp, 0x08E0
.definelabel data08e4, 0x08E4
.definelabel data08e8, 0x08E8
.definelabel data08ec, 0x08EC
.definelabel data08f0, 0x08F0
.definelabel clipTemp, 0x0940
.definelabel data0942, 0x0942
.definelabel data0944, 0x0944
.definelabel data0946, 0x0946
.definelabel rdpOutput, 0x09E0
.definelabel scratchSpace, 0x0DE0
.definelabel data0DE4, 0x0DE4
.definelabel data0DE8, 0x0DE8
.create CODE_FILE, 0x04001080
// Overlay 0
Overlay0Address:
j f3d_04001780
addi $29, $zero, displayListStackSize
jal segmented_to_physical
add $19, $24, $zero
add $20, $zero, $22
jal dma_read_write
addi $17, $zero, 0x00
// $1 = most significant 2 bits of cmd byte << 1
// $25 = first command word
dispatch_task:
lh $2, (operationJumpTable)($1)
jr $2
srl $2, $25, 23 // $2 = MSbyte << 1
SP_NOOP:
mfc0 $2, SP_STATUS
andi $2, $2, 0x0080
bne $2, $zero, f3d_040010cc
lh $21, 0x26($zero)
f3d_040010b8:
bgtz $28, read_next_task_entry
nop
j load_display_list_dma
lh $ra, DMAWaitEntry
f3d_040010c8:
lh $21, taskDoneEntry
f3d_040010cc:
j load_overlay
ori $30, $zero, overlayInfo4
load_display_list_dma:
addi $28, $zero, 0x0140 // size of display list
add $21, $zero, $ra
addi $20, $zero, inputDisplayList
add $19, $zero, $26 // TASK_DATA_PTR
addi $18, $zero, 0x013f
jal dma_read_write
addi $17, $zero, 0x00
jr $21
addi $27, $zero, inputDisplayList // initial pointer
// load overlay into IMEM
// $30 = offset into overlay table
// $21 = return address
load_overlay_fcn:
add $21, $zero, $ra
load_overlay:
lw $19, overlay_load($30)
lh $18, overlay_len($30)
lh $20, overlay_imem($30)
jal dma_read_write
addi $17, $zero, 0x00
jal wait_while_dma_busy
nop
jr $21
segmented_to_physical:
lw $11, lower24Mask
srl $12, $19, 22
andi $12, $12, 0x3c
and $19, $19, $11
add $13, $zero, $12
lw $12, 0x0160($13)
jr $ra
add $19, $19, $12
// $20 = SP_MEM address
// $19 = DRAM address
// $18 = length - 1
// $17 = 1:write, 0:read
dma_read_write:
@@dma_full:
mfc0 $11, SP_DMA_FULL
bne $11, $zero, @@dma_full
nop
mtc0 $20, SP_MEM_ADDR
bgtz $17, @@dma_write
mtc0 $19, SP_DRAM_ADDR
jr $ra
mtc0 $18, SP_RD_LEN
@@dma_write:
jr $ra
mtc0 $18, SP_WR_LEN
wait_while_dma_busy:
mfc0 $11, SP_DMA_BUSY
bne $11, $zero, wait_while_dma_busy
nop
jr $ra
nop
f3d_04001178: // sends stuff to RDP
add $21, $zero, $ra
lw $19, 0x18($29)
addi $18, $23, -0x09e0
lw $23, 0x44($29)
blez $18, f3d_040011f4
add $20, $19, $18
sub $20, $23, $20
bgez $20, f3d_040011b8
f3d_04001198:
mfc0 $20, DPC_STATUS
andi $20, $20, DPC_STATUS_START_VALID
bne $20, $zero, f3d_04001198
f3d_040011a4:
mfc0 $23, DPC_CURRENT
lw $19, 0x40($29)
beq $23, $19, f3d_040011a4
nop
mtc0 $19, DPC_START
f3d_040011b8:
mfc0 $23, DPC_CURRENT
sub $20, $19, $23
bgez $20, f3d_040011d4
add $20, $19, $18
sub $20, $20, $23
bgez $20, f3d_040011b8
nop
f3d_040011d4:
add $23, $19, $18
addi $18, $18, -0x01
addi $20, $zero, rdpOutput // output to RDP
jal dma_read_write
addi $17, $zero, 0x01
jal wait_while_dma_busy
sw $23, 0x18($29)
mtc0 $23, DPC_END
f3d_040011f4:
jr $21
addi $23, $zero, rdpOutput
// codes 0x80-0xBF
// $2 = immediate cmd byte << 1
dispatch_imm:
andi $2, $2, 0x00fe
lh $2, (immediateJumpTableBase)($2) // data IMM offset
jr $2
lbu $1, -0x01($27)
imm_TRI1:
lbu $5, -0x04($27)
lbu $1, -0x03($27)
lbu $2, -0x02($27)
lbu $3, -0x01($27)
sll $5, $5, 2
sll $1, $1, 2
sll $2, $2, 2
sll $3, $3, 2
addi $1, $1, pointsBuffer
addi $2, $2, pointsBuffer
addi $3, $3, pointsBuffer
sw $1, scratchSpace
sw $2, data0DE4
sw $3, data0DE8
lw $4, (scratchSpace)($5)
j f3d_04001998
lh $30, spNoopEntry
imm_POPMTX:
.ifdef F3D_NEW
sbv $v31[6], 0x1c($29)
.endif
lw $19, 0x24($29)
lw $3, 0x4c($29)
addi $20, $zero, modelViewMatrixStack
addi $18, $zero, 0x3f
sub $3, $3, $19
addi $3, $3, -0x0280
bgez $3, SP_NOOP // stop if stack is empty
addi $19, $19, -0x40
jal dma_read_write // read new top from DRAM
addi $17, $zero, 0x00
jal wait_while_dma_busy
addi $3, $zero, mpMatrix // MP matrix (modelview * projection)
j f3d_04001444 // recompute MP matrix
sw $19, 0x24($29)
imm_MOVEWORD:
lbu $1, -0x05($27)
lhu $2, -0x07($27)
lh $5, 0x030e($1)
add $5, $5, $2
j SP_NOOP
sw $24, 0x00($5)
imm_TEXTURE:
sw $25, 0x10($29)
sw $24, 0x14($29)
lh $2, 0x06($29)
andi $2, $2, 0xfffd
andi $3, $25, 0x0001
sll $3, $3, 1
or $2, $2, $3
j SP_NOOP
sh $2, 0x06($29)
imm_SETOTHERMODE_H:
j @f3d_040012d0
addi $7, $29, 8
imm_SETOTHERMODE_L:
addi $7, $29, 0x0c
@f3d_040012d0:
lw $3, 0x00($7)
addi $8, $zero, -1
lbu $5, -0x05($27)
lbu $6, -0x06($27)
addi $2, $zero, 1
sllv $2, $2, $5
addi $2, $2, -1
sllv $2, $2, $6
xor $2, $2, $8
and $2, $2, $3
or $3, $2, $24
sw $3, 0x00($7)
lw $25, 0x08($29)
j f3d_040013a8
lw $24, 0x0c($29)
imm_CULLDL:
andi $25, $25, 0x03ff
.ifdef F3D_OLD
ori $2, $zero, 0xffff
.else
ori $2, $zero, 0x7070
.endif
@@f3d_04001314:
lh $3, 0x0444($25)
addi $25, $25, 0x28
bne $25, $24, @@f3d_04001314
and $2, $2, $3
beq $2, $zero, SP_NOOP
DL_STACK_SIZE_OFFSET equ (defined(F3D_OLD) ? 0x00 : 0x4A)
imm_ENDDL:
lb $2, (DL_STACK_SIZE_OFFSET)($29)
addi $2, $2, -4
bltz $2, f3d_040010c8
addi $3, $2, displayListStack
lw $26, 0x00($3)
sb $2, (DL_STACK_SIZE_OFFSET)($29)
j SP_NOOP
addi $28, $zero, 0
imm_SETGEOMETRYMODE:
lw $2, 0x04($29)
or $2, $2, $24
j SP_NOOP
sw $2, 0x04($29)
imm_CLEARGEOMETRYMODE:
lw $2, 0x04($29)
addi $3, $zero, -1
xor $3, $3, $24
and $2, $2, $3
j SP_NOOP
sw $2, 0x04($29)
.ifdef F3D_OLD
imm_RDPHALF_1:
j SP_NOOP
sh $24, 0x02($29)
imm_RDPHALF_2:
.else
imm_RDPHALF_1:
.endif
j f3d_040010b8
sw $24, -0x04($29)
.ifdef F3D_OLD
imm_UNKNOWN:
.else
imm_RDPHALF_CONT:
.endif
ori $2, $zero, 0x0000
.ifdef F3D_OLD
imm_RDPHALF_CONT:
.else
imm_RDPHALF_2:
.endif
j f3d_040013a8
lw $25, -0x04($29)
// codes 0xC0-0xFF
dispatch_rdp:
sra $2, $25, 24
addi $2, $2, 3
bltz $2, f3d_040013a8
addi $2, $2, 0x18
jal segmented_to_physical
add $19, $24, $zero
add $24, $19, $zero
f3d_040013a8:
sw $25, 0x00($23)
sw $24, 0x04($23)
jal f3d_04001178
addi $23, $23, 0x08
bgtz $2, SP_NOOP
nop
j f3d_040010b8
dispatch_dma:
andi $2, $2, 0x01fe
lh $2, (dmaJumpTable)($2)
jal wait_while_dma_busy
lbu $1, -0x07($27)
jr $2
andi $6, $1, 0x000f
dma_MTX:
sbv $v31[6], 0x1c($29) // lights need re-init
andi $8, $1, 0x0001 // 1=projection, 0=modelview
bne $8, $zero, f3d_04001454
andi $7, $1, 0x0002 // 1=load, 0=multiply
addi $20, $zero, modelViewMatrixStack
andi $8, $1, 0x0004 // 1=push, 0=no push
beq $8, $zero, f3d_04001420
lqv $v26[0], 0x30($22)
lw $19, 0x24($29) // DRAM stack pointer 2
lw $8, 0x4c($29) // DRAM stack end
addi $17, $zero, 1
addi $1, $19, 0x40
beq $19, $8, f3d_04001420
addi $12, $zero, 0x3f // BUG: wrong register, should be $18
jal dma_read_write
sw $1, 0x24($29)
jal wait_while_dma_busy
f3d_04001420:
lqv $v28[0], 0x10($22)
beq $7, $zero, f3d_04001460
lqv $v27[0], 0x20($22)
sqv $v26[0], 0x30($20)
lqv $v29[0], 0x00($22)
sqv $v28[0], 0x10($20)
f3d_04001438:
addi $3, $zero, mpMatrix
sqv $v27[0], 0x20($20)
sqv $v29[0], 0x00($20)
f3d_04001444:
addi $1, $zero, modelViewMatrixStack
addi $2, $zero, projectionMatrixStack
j f3d_04001484
lh $ra, spNoopEntry
f3d_04001454:
lqv $v26[0], 0x30($22)
j f3d_04001420
addi $20, $zero, projectionMatrixStack
f3d_04001460:
addiu $3, $zero, scratchSpace
addu $1, $zero, $22 // input matrix from user
jal f3d_04001484
addu $2, $zero, $20 // current P matrix or M top
sqv $v6[0], 0x30($20) // store result to P or M
sqv $v5[0], 0x10($20)
lqv $v27[0], 0x00($3)
j f3d_04001438
lqv $v29[0], -0x20($3)
f3d_04001484:
addi $19, $3, 0x10
f3d_04001488:
vmudh $v5, $v31, $v31[0] // clear accumulator and $v5
addi $18, $1, 8
f3d_04001490:
ldv $v3[0], 0x00($2)
ldv $v4[0], 0x20($2)
lqv $v1[0], 0x00($1)
lqv $v2[0], 0x20($1)
ldv $v3[8], 0x00($2)
ldv $v4[8], 0x20($2)
vmadl $v6, $v4, $v2[0h]
addi $1, $1, 2
vmadm $v6, $v3, $v2[0h]
addi $2, $2, 8
vmadn $v6, $v4, $v1[0h]
vmadh $v5, $v3, $v1[0h]
bne $1, $18, f3d_04001490
vmadn $v6, $v31, $v31[0]
addi $2, $2, -0x20
addi $1, $1, 8
sqv $v5[0], 0x00($3)
sqv $v6[0], 0x20($3)
bne $3, $19, f3d_04001488
addi $3, $3, 0x10
jr $ra
nop
f3d_040014e8:
addi $8, $zero, viewport
lqv $v3[0], 0x50($zero)
lsv $v19[0], 0x02($29) // RDPHALF_1, contains persp normalize
lh $3, 0x04($29) // geometrymode
ldv $v0[0], 0x00($8) // viewport scale
ldv $v1[0], 0x08($8) // viewport translate
ldv $v0[8], 0x00($8)
ldv $v1[8], 0x08($8)
jr $ra
vmudh $v0, $v0, $v3 // negate Y?
load_mp_matrix:
addi $8, $zero, mpMatrix
ldv $v11[0], 0x18($8) // load into $v8-v15, dup lower half and higher half
ldv $v11[8], 0x18($8) // $v8-v11 integer parts, $v12-v15 frac parts
ldv $v15[0], 0x38($8)
ldv $v15[8], 0x38($8)
f3d_04001524:
ldv $v8[0], 0x00($8)
ldv $v9[0], 0x08($8)
ldv $v10[0], 0x10($8)
ldv $v12[0], 0x20($8)
ldv $v13[0], 0x28($8)
ldv $v14[0], 0x30($8)
ldv $v8[8], 0x00($8)
ldv $v9[8], 0x08($8)
ldv $v10[8], 0x10($8)
ldv $v12[8], 0x20($8)
ldv $v13[8], 0x28($8)
jr $ra
ldv $v14[8], 0x30($8)
dma_MOVEMEM:
lqv $v0[0], 0x00($22)
lh $5, (dmemTableOffset)($1)
j SP_NOOP
sqv $v0[0], 0x00($5)
dma_VTX:
lh $8, spNoopEntry
sh $8, data0106
srl $1, $1, 4
addi $5, $1, 1 // num vertex
addi $9, $5, 0
ldv $v2[0], 0x00($22) // input data
ldv $v2[8], 0x10($22) // load 2nd vertex (assuming it exists)
addi $7, $zero, pointsBuffer
sll $8, $6, 5 // dest index
sll $6, $6, 3
add $8, $6, $8 // 40 bytes per vertex
jal f3d_040014e8
add $7, $7, $8
llv $v17[0], 0x14($29) // texture scaling
jal load_mp_matrix
llv $v17[8], 0x14($29)
@f3d_040015a8:
vmudn $v28, $v12, $v2[0h] // x * first row frac
llv $v18[0], 0x08($22)
vmadh $v28, $v8, $v2[0h] // x * first row int
lw $15, 0x0c($22) // XR, YG, ZB, AA
vmadn $v28, $v13, $v2[1h] // y * second row frac
lw $16, 0x1c($22)
vmadh $v28, $v9, $v2[1h] // y * second row int
andi $1, $3, G_LIGHTING_H
vmadn $v28, $v14, $v2[2h] // z * third row frac
vmadh $v28, $v10, $v2[2h] // z * third row int
vmadn $v28, $v15, $v31[1] // 1 * fourth row frac
llv $v18[8], 0x18($22)
vmadh $v29, $v11, $v31[1] // 1 * fourth row int
bne $1, $zero, load_lighting
addi $22, $22, 0x20 // next 2 vertices
@f3d_040015e4:
vmudm $v18, $v18, $v17 // U *= S scale, V *= T scale (result >> 16)
@f3d_040015e8:
lsv $v21[0], 0x76($zero)
vmudn $v20, $v28, $v21[0]
vmadh $v21, $v29, $v21[0]
vch $v3, $v29, $v29[3h] // do trivial clip rejection
vcl $v3, $v28, $v28[3h] // by comparing xyz with w
cfc2 $13, vcc
vch $v3, $v29, $v21[3h]
vcl $v3, $v28, $v20[3h]
andi $8, $13, 0x0707 // filter out xyz clip result for 1st vertex
andi $13, $13, 0x7070 // filter out xyz clip result for 2nd vertex
sll $8, $8, 4
sll $13, $13, 16
or $13, $13, $8
cfc2 $14, vcc
andi $8, $14, 0x0707
vadd $v21, $v29, $v31[0]
andi $14, $14, 0x7070
vadd $v20, $v28, $v31[0]
sll $14, $14, 12
vmudl $v28, $v28, $v19[0] // persp normalize, used to improve precision
or $8, $8, $14
vmadm $v29, $v29, $v19[0]
or $8, $8, $13
vmadn $v28, $v31, $v31[0]
sh $8, 0x24($7)
jal f3d_04001000 // compute 1/w
lh $13, -0x1a($22) // $13 unused?
vge $v6, $v27, $v31[0] // 1/w >= 0?
sdv $v21[0], 0x00($7) // store xyzw int
vmrg $v6, $v27, $v30[0]
sdv $v20[0], 0x08($7) // store xyzw frac
vmudl $v5, $v20, $v26[3h] // mul xyzw with 1/w
vmadm $v5, $v21, $v26[3h]
vmadn $v5, $v20, $v6[3h]
vmadh $v4, $v21, $v6[3h]
addi $9, $9, -1 // decrement vertex input count
vmudl $v5, $v5, $v19[0] // take away persp normalize factor
vmadm $v4, $v4, $v19[0]
vmadn $v5, $v31, $v31[0]
andi $12, $3, G_FOG_H
ldv $v2[0], 0x00($22) // pre-load next vertices from input
vmudh $v7, $v1, $v31[1] // viewport translate * 0001
ldv $v2[8], 0x10($22)
vmadn $v7, $v5, $v0 // viewport scale
ldv $v29[0], 0x28($zero)
vmadh $v6, $v4, $v0
ldv $v29[8], 0x28($zero)
vmadn $v7, $v31, $v31[0] // $v6$v7 contains vertex results after viewport
vge $v6, $v6, $v29[1q] // some saturating 0FFA-F006
sw $15, 0x10($7)
beq $12, $zero, @@f3d_040016e0 // skip fog?
vlt $v6, $v6, $v29[0q]
lqv $v3[0], 0x0330($zero)
vmudn $v5, $v5, $v3[0] // mul fog factor (default 1)
vmadh $v4, $v4, $v3[0]
vadd $v4, $v4, $v3[1] // add parameter (default 0)
vge $v4, $v4, $v31[0]
vlt $v4, $v4, $v3[2] // min parameter (default 0xff)
sbv $v4[5], 0x13($7) // high z for 1st vertex, store in AA
sw $16, 0x18($7)
sbv $v4[13], 0x1b($7) // high z for 2nd vertex, store in AA
lw $16, 0x18($7)
@@f3d_040016e0:
slv $v18[0], 0x14($7) // texture coordinates, 1st vertex
sdv $v6[0], 0x18($7) // xyz_int after viewport
ssv $v7[4], 0x1e($7) // z_frac after viewport
ssv $v27[6], 0x20($7) // 1/w
ssv $v26[6], 0x22($7)
blez $9, @@f3d_04001728
addi $9, $9, -1 // decrement vertex input counter again
sdv $v21[8], 0x28($7)
sdv $v20[8], 0x30($7)
slv $v18[8], 0x3c($7) // texture coordinates, 2nd vertex
sw $16, 0x38($7)
sdv $v6[8], 0x40($7)
ssv $v7[12], 0x46($7)
ssv $v27[14], 0x48($7)
ssv $v26[14], 0x4a($7)
sw $8, 0x4c($7) // puts high hword first
addi $7, $7, 0x50
bgtz $9, @f3d_040015a8
@@f3d_04001728:
lh $8, data0106
jr $8
nop
dma_DL:
bgtz $1, @@f3d_04001754 // 0=store ret addr, 1=end DL after branch
lb $2, (DL_STACK_SIZE_OFFSET)($29)
addi $4, $2, -0x24 // DL stack full?
bgtz $4, SP_NOOP
addi $3, $2, displayListStack
addi $2, $2, 4
sw $26, 0x00($3) // store return address on DL stack
sb $2, (DL_STACK_SIZE_OFFSET)($29)
@@f3d_04001754:
jal segmented_to_physical
add $19, $24, $zero
add $26, $19, $zero
j SP_NOOP
addi $28, $zero, 0x00
// Overlays 2-4 will overwrite the following code
.org 0x04001768
f3d_04001768:
ori $30, $zero, overlayInfo2
b load_overlay
lh $21, performClipEntry
load_lighting:
ori $30, $zero, overlayInfo3
b load_overlay
lh $21, lightEntry
f3d_04001780:
ori $2, $zero, 0x2800 // clear yielded, clear taskdone
mtc0 $2, SP_STATUS
lqv $v31[0], 0x30($zero)
lqv $v30[0], 0x40($zero)
lw $4, OSTask_addr + OSTask_flags
andi $4, $4, 0x0001
bne $4, $zero, @@f3d_04001870
nop
lw $23, 0x28($1) // task output buff
lw $3, 0x2c($1) // task output buff size
sw $23, 0x40($29)
sw $3, 0x44($29)
mfc0 $4, DPC_STATUS
andi $4, $4, DPC_STATUS_XBUS_DMA
bne $4, $zero, @@f3d_040017e4
mfc0 $4, DPC_END
sub $23, $23, $4
bgtz $23, @@f3d_040017e4
mfc0 $5, DPC_CURRENT
beq $5, $zero, @@f3d_040017e4
nop
beq $5, $4, @@f3d_040017e4
nop
j @@f3d_04001800
ori $3, $4, 0x0000
@@f3d_040017e4:
mfc0 $4, DPC_STATUS
andi $4, $4, DPC_STATUS_START_VALID
bne $4, $zero, @@f3d_040017e4
addi $4, $zero, DPC_STATUS_CLR_XBUS
mtc0 $4, DPC_STATUS
mtc0 $3, DPC_START
mtc0 $3, DPC_END
@@f3d_04001800:
sw $3, 0x18($29)
addi $23, $zero, rdpOutput
lw $5, 0x10($1) // TASK_UCODE (DRAM address)
lw $2, overlayInfo1
lw $3, overlayInfo2
lw $4, overlayInfo3
lw $6, overlayInfo4
add $2, $2, $5 // apply DRAM offset
add $3, $3, $5
add $4, $4, $5
add $6, $6, $5
sw $2, overlayInfo1 // store back with DRAM offsets
sw $3, overlayInfo2
sw $4, overlayInfo3
sw $6, overlayInfo4
jal load_overlay_fcn
addi $30, $zero, overlayInfo1
jal load_display_list_dma
lw $26, 0x30($1) // TASK_DATA_PTR
lw $2, 0x20($1) // TASK_DRAM_STACK
sw $2, 0x20($29)
sw $2, 0x24($29)
addi $2, $2, 0x0280 // end of stack?
sw $2, 0x4c($29)
lw $2, -0x08($zero) // TASK_YIELD_DATA_PTR
sw $2, dramPtr
j dma_wait_dl
nop
@@f3d_04001870:
jal load_overlay_fcn
addi $30, $zero, overlayInfo1
lw $23, data08F0
lw $28, data08E4
lw $27, data08E8
j SP_NOOP
lw $26, data08EC
// 0x0400188c-0x04001987: bunch of nops
.fill 0xfc, 0
.ifdef F3D_OLD
.fill 16, 0
.endif
// from G_TRI1
f3d_04001998:
lh $11, 0x24($3)
lh $8, 0x24($2)
lh $9, 0x24($1)
and $12, $11, $8
or $11, $11, $8
and $12, $12, $9
andi $12, $12, 0x7070
bne $12, $zero, SP_NOOP // all vertices outside screen, return
or $11, $11, $9
andi $11, $11, 0x4343
bne $11, $zero, f3d_04001768 // halfway outside, so trigger clipping routine
f3d_040019c4:
llv $v13[0], 0x18($1) // xy_int after viewport
llv $v14[0], 0x18($2)
llv $v15[0], 0x18($3)
lw $13, 0x04($29) // geometrymode
addi $8, $zero, setupTemp // setup temp area
lsv $v21[0], 0x02($29)
lsv $v5[0], 0x06($1) // w_int p1
vsub $v10, $v14, $v13 // p2-p1
lsv $v6[0], 0x0e($1) // w_frac p1
vsub $v9, $v15, $v13 // p3-p1
lsv $v5[2], 0x06($2)
vsub $v12, $v13, $v14 // p1-p2
lsv $v6[2], 0x0e($2)
lsv $v5[4], 0x06($3)
lsv $v6[4], 0x0e($3)
vmudh $v16, $v9, $v10[1] // (p3-p1)*((p2-p1)_y)
lh $9, 0x1a($1) // y_int after viewport
vsar $v18, $v18, $v18[1] // high into $v18
lh $10, 0x1a($2)
vsar $v17, $v17, $v17[0] // bits 47..31 of ACC
lh $11, 0x1a($3)
vmudh $v16, $v12, $v9[1] // (p1-p2)*((p3-p1)_y)
andi $14, $13, G_CULL_FRONT
vsar $v20, $v20, $v20[1]
andi $15, $13, G_CULL_BACK
vsar $v19, $v19, $v19[0]
addi $12, $zero, 0 // now sort p1,p2,p3 by y
@@sort_points_loop:
slt $7, $10, $9
blez $7, @@f3d_04001a58
add $7, $10, $zero // y2_int < y1_int (after viewport)
add $10, $9, $zero // swap $9/$10 and swap $1/$2
add $9, $7, $zero
addu $7, $2, $zero
addu $2, $1, $zero
addu $1, $7, $zero
xori $12, $12, 0x0001 // xor that we swapped p1 and p2
nop // interesting place for NOP
@@f3d_04001a58:
vaddc $v28, $v18, $v20
slt $7, $11, $10
vadd $v29, $v17, $v19
blez $7, @@f3d_04001a88
add $7, $11, $zero // y3_int < y2_int?
add $11, $10, $zero // swap p2, p3
add $10, $7, $zero
addu $7, $3, $zero
addu $3, $2, $zero
addu $2, $7, $zero
j @@sort_points_loop // go back to test y1 and new y2
xori $12, $12, 0x0001 // xor that we swapped p2 and p3
@@f3d_04001a88:
vlt $v27, $v29, $v31[0]
llv $v15[0], 0x18($3) // xy_int after viewport for new p3
vor $v26, $v29, $v28
llv $v14[0], 0x18($2)
llv $v13[0], 0x18($1)
blez $12, @@f3d_04001ab0 // skip if even number of swaps
vsub $v4, $v15, $v14 // p3-p2
vmudn $v28, $v28, $v31[3]
vmadh $v29, $v29, $v31[3]
vmadn $v28, $v31, $v31[0]
@@f3d_04001ab0:
vsub $v10, $v14, $v13 // p2-p1
mfc2 $17, $v27[0]
vsub $v9, $v15, $v13 // p3-p1
mfc2 $16, $v26[0]
sra $17, $17, 31
vmov $v29[3], $v29[0]
and $15, $15, $17
vmov $v28[3], $v28[0]
vmov $v4[2], $v10[0]
beq $16, $zero, @@f3d_04001fd0 // skip this triangle?
xori $17, $17, 0xffff
vlt $v27, $v29, $v31[0]
and $14, $14, $17
vmov $v4[3], $v10[1]
or $16, $15, $14
vmov $v4[4], $v9[0]
bgtz $16, @@f3d_04001fd0
vmov $v4[5], $v9[1]
mfc2 $7, $v27[0]
jal f3d_04001000
addi $6, $zero, 0x80 // left major flag
bltz $7, @@f3d_04001b10
lb $5, 0x07($29) // low byte for geometrymode
addi $6, $zero, 0
@@f3d_04001b10:
vmudm $v9, $v4, $v31[4]
vmadn $v10, $v31, $v31[0]
vrcp $v8[1], $v4[1]
vrcph $v7[1], $v31[0]
ori $5, $5, 0x00c8 // OR with RDP command code
lb $7, 0x12($29) // mpmap level and tile ID
vrcp $v8[3], $v4[3]
vrcph $v7[3], $v31[0]
vrcp $v8[5], $v4[5]
vrcph $v7[5], $v31[0]
or $6, $6, $7
vmudl $v8, $v8, $v30[4]
sb $5, 0x00($23)
vmadm $v7, $v7, $v30[4]
sb $6, 0x01($23)
vmadn $v8, $v31, $v31[0]
vmudh $v4, $v4, $v31[5]
lsv $v12[0], 0x18($2)
vmudl $v6, $v6, $v21[0]
lsv $v12[4], 0x18($1)
vmadm $v5, $v5, $v21[0]
lsv $v12[8], 0x18($1)
vmadn $v6, $v31, $v31[0]
sll $7, $9, 14
vmudl $v1, $v8, $v10[0q]
vmadm $v1, $v7, $v10[0q]
vmadn $v1, $v8, $v9[0q]
vmadh $v0, $v7, $v9[0q]
mtc2 $7, $v2[0]
vmadn $v1, $v31, $v31[0]
sw $3, 0x00($8)
vmudl $v8, $v8, $v31[4]
vmadm $v7, $v7, $v31[4]
vmadn $v8, $v31, $v31[0]
vmudl $v1, $v1, $v31[4]
vmadm $v0, $v0, $v31[4]
vmadn $v1, $v31, $v31[0]
sh $11, 0x02($23) // YL
vand $v16, $v1, $v30[1]
sh $9, 0x06($23) // YH
vmudm $v12, $v12, $v31[4]
sw $2, 0x04($8)
vmadn $v13, $v31, $v31[0]
sw $1, 0x08($8)
sh $10, 0x04($23) // YM
vcr $v0, $v0, $v30[6]
ssv $v12[0], 0x08($23) // XL
vmudl $v11, $v16, $v2[0]
ssv $v13[0], 0x0a($23) // XL, frac
vmadm $v10, $v0, $v2[0]
ssv $v0[2], 0x0c($23) // DxLDy
vmadn $v11, $v31, $v31[0]
ssv $v1[2], 0x0e($23) // DxLDy, frac
andi $7, $5, G_TEXTURE_ENABLE
addi $15, $8, 8
addi $16, $8, 0x10
vsubc $v3, $v13, $v11[1q]
ssv $v0[10], 0x14($23) // DxHDy
vsub $v9, $v12, $v10[1q]
ssv $v1[10], 0x16($23) // DxHDy, frac
vsubc $v21, $v6, $v6[1]
ssv $v0[6], 0x1c($23) // DxMDy
vlt $v19, $v5, $v5[1]
ssv $v1[6], 0x1e($23) // DxMDy, frac
vmrg $v20, $v6, $v6[1]
ssv $v9[8], 0x10($23) // XH
vsubc $v21, $v20, $v6[2]
ssv $v3[8], 0x12($23) // XH, frac
vlt $v19, $v19, $v5[2]
ssv $v9[4], 0x18($23) // XM
vmrg $v20, $v20, $v6[2]
ssv $v3[4], 0x1a($23) // XM, frac
addi $23, $23, 0x20
blez $7, @@f3d_04001cfc // no texture?
vmudl $v20, $v20, $v30[5]
lw $14, 0x00($15)
vmadm $v19, $v19, $v30[5]
lw $17, -0x04($15)
vmadn $v20, $v31, $v31[0]
lw $18, -0x08($15)
llv $v9[0], 0x14($14)
llv $v9[8], 0x14($17)
llv $v22[0], 0x14($18)
lsv $v11[0], 0x22($14)
lsv $v12[0], 0x20($14)
lsv $v11[8], 0x22($17)
vmov $v9[2], $v30[0]
lsv $v12[8], 0x20($17)
vmov $v9[6], $v30[0]
lsv $v24[0], 0x22($18)
vmov $v22[2], $v30[0]
lsv $v25[0], 0x20($18)
vmudl $v6, $v11, $v20[0]
vmadm $v6, $v12, $v20[0]
ssv $v19[0], 0x44($8)
vmadn $v6, $v11, $v19[0]
ssv $v20[0], 0x4c($8)
vmadh $v5, $v12, $v19[0]
vmudl $v16, $v24, $v20[0]
vmadm $v16, $v25, $v20[0]
vmadn $v20, $v24, $v19[0]
vmadh $v19, $v25, $v19[0]
vmudm $v16, $v9, $v6[0h]
vmadh $v9, $v9, $v5[0h]
vmadn $v10, $v31, $v31[0]
vmudm $v16, $v22, $v20[0]
vmadh $v22, $v22, $v19[0]
vmadn $v23, $v31, $v31[0]
sdv $v9[8], 0x10($16)
sdv $v10[8], 0x18($16)
sdv $v9[0], 0x00($16)
sdv $v10[0], 0x08($16)
sdv $v22[0], 0x20($16)
sdv $v23[0], 0x28($16)
vabs $v9, $v9, $v9
llv $v19[0], 0x10($16)
vabs $v22, $v22, $v22
llv $v20[0], 0x18($16)
vabs $v19, $v19, $v19
vge $v17, $v9, $v22
vmrg $v18, $v10, $v23
vge $v17, $v17, $v19
vmrg $v18, $v18, $v20
@@f3d_04001cfc:
slv $v17[0], 0x40($8)
slv $v18[0], 0x48($8)
andi $7, $5, (G_SHADE | G_TEXTURE_ENABLE | G_ZBUFFER)
blez $7, @@f3d_04001fcc // skip code below if no bits set
vxor $v18, $v31, $v31
luv $v25[0], 0x10($3)
vadd $v16, $v18, $v30[5]
luv $v15[0], 0x10($1)
vadd $v24, $v18, $v30[5]
andi $7, $13, 0x0200
vadd $v5, $v18, $v30[5]
bgtz $7, @@f3d_04001d3c
luv $v23[0], 0x10($2)
luv $v25[0], 0x10($4)
luv $v15[0], 0x10($4)
luv $v23[0], 0x10($4)
@@f3d_04001d3c:
vmudm $v25, $v25, $v31[7]
vmudm $v15, $v15, $v31[7]
vmudm $v23, $v23, $v31[7]
ldv $v16[8], 0x18($8)
ldv $v15[8], 0x10($8)
ldv $v24[8], 0x28($8)
ldv $v23[8], 0x20($8)
ldv $v5[8], 0x38($8)
ldv $v25[8], 0x30($8)
lsv $v16[14], 0x1e($1)
lsv $v15[14], 0x1c($1)
lsv $v24[14], 0x1e($2)
lsv $v23[14], 0x1c($2)
lsv $v5[14], 0x1e($3)
lsv $v25[14], 0x1c($3)
vsubc $v12, $v24, $v16
vsub $v11, $v23, $v15
vsubc $v20, $v16, $v5
vsub $v19, $v15, $v25
vsubc $v10, $v5, $v16
vsub $v9, $v25, $v15
vsubc $v22, $v16, $v24
vsub $v21, $v15, $v23
vmudn $v6, $v10, $v4[3]
vmadh $v6, $v9, $v4[3]
vmadn $v6, $v22, $v4[5]
vmadh $v6, $v21, $v4[5]
vsar $v9, $v9, $v9[0]
vsar $v10, $v10, $v10[1]
vmudn $v6, $v12, $v4[4]
vmadh $v6, $v11, $v4[4]
vmadn $v6, $v20, $v4[2]
vmadh $v6, $v19, $v4[2]
vsar $v11, $v11, $v11[0]
vsar $v12, $v12, $v12[1]
vmudl $v6, $v10, $v26[3]
vmadm $v6, $v9, $v26[3]
vmadn $v10, $v10, $v27[3]
vmadh $v9, $v9, $v27[3]
vmudl $v6, $v12, $v26[3]
vmadm $v6, $v11, $v26[3]
vmadn $v12, $v12, $v27[3]
sdv $v9[0], 0x08($23)
vmadh $v11, $v11, $v27[3]
sdv $v10[0], 0x18($23)
vmudn $v6, $v12, $v31[1]
vmadh $v6, $v11, $v31[1]
vmadl $v6, $v10, $v1[5]
vmadm $v6, $v9, $v1[5]
vmadn $v14, $v10, $v0[5]
sdv $v11[0], 0x28($23)
vmadh $v13, $v9, $v0[5]
sdv $v12[0], 0x38($23)
vmudl $v28, $v14, $v2[0]
sdv $v13[0], 0x20($23)
vmadm $v6, $v13, $v2[0]
sdv $v14[0], 0x30($23)
vmadn $v28, $v31, $v31[0]
vsubc $v18, $v16, $v28
vsub $v17, $v15, $v6
andi $7, $5, G_SHADE
blez $7, @@f3d_04001e44
andi $7, $5, G_TEXTURE_ENABLE
addi $23, $23, 0x40
sdv $v17[0], -0x40($23)
sdv $v18[0], -0x30($23)
@@f3d_04001e44:
blez $7, @@f3d_04001f48
andi $7, $5, G_ZBUFFER
addi $16, $zero, 0x0800
mtc2 $16, $v19[0]
vabs $v24, $v9, $v9
ldv $v20[8], 0x40($8)
vabs $v25, $v11, $v11
ldv $v21[8], 0x48($8)
vmudm $v24, $v24, $v19[0]
vmadn $v26, $v31, $v31[0]
vmudm $v25, $v25, $v19[0]
vmadn $v27, $v31, $v31[0]
vmudl $v21, $v21, $v19[0]
vmadm $v20, $v20, $v19[0]
vmadn $v21, $v31, $v31[0]
vmudn $v26, $v26, $v31[2]
vmadh $v24, $v24, $v31[2]
vmadn $v26, $v31, $v31[0]
vmadn $v23, $v27, $v31[1]
vmadh $v22, $v25, $v31[1]
addi $16, $zero, 0x40
vmadn $v6, $v21, $v31[1]
mtc2 $16, $v19[0]
vmadh $v5, $v20, $v31[1]
vsubc $v23, $v6, $v6[5]
vge $v5, $v5, $v5[5]
vmrg $v6, $v6, $v6[5]
vsubc $v23, $v6, $v6[6]
vge $v5, $v5, $v5[6]
vmrg $v6, $v6, $v6[6]
vmudl $v6, $v6, $v19[0]
vmadm $v5, $v5, $v19[0]
vmadn $v6, $v31, $v31[0]
vrcph $v23[0], $v5[4]
vrcpl $v6[0], $v6[4]
vrcph $v5[0], $v31[0]
vmudn $v6, $v6, $v31[2]
vmadh $v5, $v5, $v31[2]
vlt $v5, $v5, $v31[1]
vmrg $v6, $v6, $v31[0]
vmudl $v20, $v18, $v6[0]
vmadm $v20, $v17, $v6[0]
vmadn $v20, $v18, $v5[0]
vmadh $v19, $v17, $v5[0]
vmudl $v22, $v10, $v6[0]
vmadm $v22, $v9, $v6[0]
vmadn $v22, $v10, $v5[0]
sdv $v19[8], 0x00($23)
vmadh $v21, $v9, $v5[0]
sdv $v20[8], 0x10($23)
vmudl $v24, $v12, $v6[0]
vmadm $v24, $v11, $v6[0]
vmadn $v24, $v12, $v5[0]
sdv $v21[8], 0x08($23)
vmadh $v23, $v11, $v5[0]
sdv $v22[8], 0x18($23)
vmudl $v26, $v14, $v6[0]
vmadm $v26, $v13, $v6[0]
vmadn $v26, $v14, $v5[0]
sdv $v23[8], 0x28($23)
vmadh $v25, $v13, $v5[0]
sdv $v24[8], 0x38($23)
addi $23, $23, 0x40
sdv $v25[8], -0x20($23)
sdv $v26[8], -0x10($23)
@@f3d_04001f48:
blez $7, @@f3d_04001fcc
vmudn $v14, $v14, $v30[4]
vmadh $v13, $v13, $v30[4]
vmadn $v14, $v31, $v31[0]
vmudn $v16, $v16, $v30[4]
vmadh $v15, $v15, $v30[4]
vmadn $v16, $v31, $v31[0]
ssv $v13[14], 0x08($23)
vmudn $v10, $v10, $v30[4]
ssv $v14[14], 0x0a($23)
vmadh $v9, $v9, $v30[4]
vmadn $v10, $v31, $v31[0]
vmudn $v12, $v12, $v30[4]
vmadh $v11, $v11, $v30[4]
vmadn $v12, $v31, $v31[0]
lbu $7, 0x11($29)
sub $7, $zero, $7
beq $7, $zero, @@f3d_04001f9c
mtc2 $7, $v6[0]
vch $v11, $v11, $v6[0]
vcl $v12, $v12, $v31[0]
@@f3d_04001f9c:
ssv $v9[14], 0x04($23)
vmudl $v28, $v14, $v2[0]
ssv $v10[14], 0x06($23)
vmadm $v6, $v13, $v2[0]
ssv $v11[14], 0x0c($23)
vmadn $v28, $v31, $v31[0]
ssv $v12[14], 0x0e($23)
vsubc $v18, $v16, $v28
vsub $v17, $v15, $v6
addi $23, $23, 0x10
ssv $v17[14], -0x10($23)
ssv $v18[14], -0x0e($23)
@@f3d_04001fcc:
jal f3d_04001178
@@f3d_04001fd0:
nop
jr $30
nop
nop
Overlay0End:
// Overlay 1
.headersize 0x04001000 - orga()
.definelabel Overlay1LoadStart, orga()
// reciprocal method, see RSP Programmers Guide page 79
// $v29[3]=s_int, $v28[3]=s_frac, $v29[7]=t_int, $v28[7]=t_frac
// out: $v27[3,7]=s,t int, $v26[3,7]=s,t frac
Overlay1Address:
f3d_04001000:
vrcph $v27[3], $v29[3]
vrcpl $v26[3], $v28[3]
vrcph $v27[3], $v29[7]
vrcpl $v26[7], $v28[7]
vrcph $v27[7], $v31[0]
vmudn $v26, $v26, $v31[2] // 0002, << 1 since input is S15.16
vmadh $v27, $v27, $v31[2]
vmadn $v26, $v31, $v31[0]
// $v27[3]=sres_int, $v26[3]=sres_frac, $v27[7]=tres_int, $v26[7]=tres_frac
lqv $v23[0], 0x60($zero)
vxor $v22, $v31, $v31 // (1/w)*w
vmudl $v24, $v26, $v28
vmadm $v24, $v27, $v28
vmadn $v24, $v26, $v29
vmadh $v25, $v27, $v29
// $v24=frac, $v25=int, should be very close to 1.0
vsubc $v24, $v22, $v24 // take 2.0-result (better rounding?)
vsub $v25, $v23, $v25
vmudl $v22, $v26, $v24 // (2.0-(1/w)*w)*(1/w)
vmadm $v23, $v27, $v24
vmadn $v26, $v26, $v25
vmadh $v27, $v27, $v25
jr $ra
nop
dma_wait_dl:
jal wait_while_dma_busy
addi $27, $zero, inputDisplayList
read_next_task_entry:
lw $25, 0x00($27) // first command word
lw $24, 0x04($27) // second command word
srl $1, $25, 29
andi $1, $1, 0x0006 // $1 = (two MSbits) << 1
addi $26, $26, 8 // increase next task in DRAM ptr
addi $27, $27, 8 // increase next task in DMEM ptr
addi $28, $28, -8 // decrease task count left in DMEM
bgtz $1, dispatch_task
andi $18, $25, 0x01ff
addi $22, $zero, inputData // command that loads data input
Overlay1End:
// Overlay 2
.headersize 0x04001768 - orga()
Overlay2Address:
b perform_clip
sh $ra, data0158
nop
nop
ori $30, $zero, overlayInfo3
b load_overlay
lh $21, lightEntry
perform_clip:
sh $3, clipTemp
sh $2, data0942
sh $1, data0944
sh $zero, data0946
ori $7, $zero, 0x0db8
ori $30, $zero, clipTemp
ori $6, $zero, 0x000c
next_clip:
or $5, $30, $30
xori $30, $30, 0x0014
f3d_040017a8:
beq $6, $zero, @f3d_04001954
lh $11, 0xa6($6)
addi $6, $6, -2
ori $17, $zero, 0x0000
or $18, $zero, $zero
found_in:
ori $2, $5, 0x0000
found_out:
j f3d_040017d4
addi $14, $30, 2
f3d_040017c8:
and $8, $8, $11
beq $8, $18, f3d_o2_04001804
addi $2, $2, 2
f3d_040017d4:
or $20, $10, $zero
sh $10, 0x00($14)
addi $14, $14, 2
f3d_040017e0:
lh $10, 0x00($2)
bne $10, $zero, f3d_040017c8
lh $8, 0x24($10)
addi $8, $17, -2
bgtz $8, f3d_040017e0
ori $2, $5, 0x0000
beq $8, $zero, f3d_040017a8
nop
j f3d_04001980
f3d_o2_04001804:
xor $18, $18, $11
lh $8, lo(labelLUT)($17)
addi $17, $17, 2
jr $8
lh $8, nextClipEntry
found_first_in:
mtc2 $10, $v13[0]
or $10, $20, $zero
mfc2 $20, $v13[0]
ori $14, $30, 0x0000
lh $8, foundOutEntry
found_first_out:
sh $8, data0106
addi $7, $7, 0x28
sh $7, 0x00($14)
sh $zero, 0x02($14)
ldv $v9[0], 0x00($10)
ldv $v10[0], 0x08($10)
ldv $v4[0], 0x00($20)
ldv $v5[0], 0x08($20)
sll $8, $6, 2
ldv $v1[0], 0x70($8)
vmudh $v0, $v1, $v31[3]
vmudn $v12, $v5, $v1
vmadh $v11, $v4, $v1
vmadn $v12, $v31, $v31[0]
vmadn $v28, $v10, $v0
vmadh $v29, $v9, $v0
vmadn $v28, $v31, $v31[0]
vaddc $v26, $v28, $v28[0q]
vadd $v27, $v29, $v29[0q]
vaddc $v28, $v26, $v26[1h]
vadd $v29, $v27, $v27[1h]
mfc2 $8, $v29[6]
vrcph $v7[3], $v29[3]
vrcpl $v3[3], $v28[3]
vrcph $v7[3], $v31[0]
vmudn $v3, $v3, $v31[2]
bgez $8, f3d_040018a4
vmadh $v7, $v7, $v31[2]
vmudn $v3, $v3, $v31[3]
vmadh $v7, $v7, $v31[3]
f3d_040018a4:
veq $v7, $v7, $v31[0]
vmrg $v3, $v3, $v31[3]
vmudl $v28, $v28, $v3[3]
vmadm $v29, $v29, $v3[3]
jal f3d_04001000
vmadn $v28, $v31, $v31[0]
vaddc $v28, $v12, $v12[0q]
vadd $v29, $v11, $v11[0q]
vaddc $v12, $v28, $v28[1h]
vadd $v11, $v29, $v29[1h]
vmudl $v15, $v12, $v26
vmadm $v15, $v11, $v26
vmadn $v15, $v12, $v27
vmadh $v8, $v11, $v27
vmudl $v28, $v31, $v31[5]
vmadl $v15, $v15, $v3[3]
vmadm $v8, $v8, $v3[3]
vmadn $v15, $v31, $v31[0]
veq $v8, $v8, $v31[0]
vmrg $v15, $v15, $v31[3]
vne $v15, $v15, $v31[0]
vmrg $v15, $v15, $v31[1]
vnxor $v8, $v15, $v31[0]
vaddc $v8, $v8, $v31[1]
vadd $v29, $v29, $v29
vmudl $v28, $v5, $v8[3h]
vmadm $v29, $v4, $v8[3h]
vmadl $v28, $v10, $v15[3h]
vmadm $v29, $v9, $v15[3h]
vmadn $v28, $v31, $v31[0]
luv $v12[0], 0x10($10)
luv $v11[0], 0x10($20)
llv $v12[8], 0x14($10)
llv $v11[8], 0x14($20)
vmudm $v18, $v12, $v15[3]
vmadm $v18, $v11, $v8[3]
suv $v18[0], 0x00($7)
sdv $v18[8], 0x08($7)
ldv $v18[0], 0x08($7)
jal f3d_040014e8
lw $15, 0x00($7)
mfc2 $10, $v13[0]
j @f3d_040015e8
ori $9, $zero, 0x0001
@f3d_04001954:
lh $8, 0x00($5)
sh $8, 0xb4($zero)
sh $5, data0106
lh $30, clipDrawEntry
clip_draw_loop:
lh $8, data0106
lh $3, 0xb4($zero)
lh $2, 0x02($8)
lh $1, 0x04($8)
addi $8, $8, 2
bne $1, $zero, f3d_040019c4
sh $8, data0106
f3d_04001980:
j SP_NOOP
nop
Overlay2End:
// Overlay 3
.headersize 0x04001768 - orga()
Overlay3Address:
ori $30, $zero, overlayInfo2
b load_overlay
lh $21, performClipEntry
lw $1, numLights
sw $15, 0x00($7) // normal vector 1st vertex
sw $16, 0x04($7) // normal vector 2nd vertex
bltz $1, @init_lights
lpv $v4[0], 0x00($7)
luv $v7[0], 0x01d0($1) // ambient RGB
vxor $v27, $v27, $v27
@@f3d_04001790:
vge $v7, $v7, $v31[0] // max(0, $v7)
lpv $v5[0], 0x01c0($1) // calculated light
vadd $v27, $v27, $v7
luv $v7[0], 0x01b0($1) // light's RGB
vor $v20, $v6, $v31[0]
vmulf $v6, $v4, $v5 // mul normal vector
vadd $v3, $v6, $v6[1q]
vadd $v6, $v3, $v6[2h]
vmulf $v7, $v7, $v6[0h] // $v6[0] and $v6[4] contain dot product
bgtz $1, @@f3d_04001790
addi $1, $1, -0x20
suv $v27[0], 0x00($7)
andi $8, $3, G_TEXTURE_GEN_H
sb $15, 0x03($7)
sb $16, 0x07($7)
lw $15, 0x00($7)
beq $8, $zero, @f3d_040015e4
lw $16, 0x04($7)
andi $8, $3, G_TEXTURE_GEN_LINEAR_H // not used in SM64
lpv $v7[0], 0x90($29)
ldv $v6[0], 0xa0($zero)
vmadn $v20, $v7, $v20[0h]
beq $8, $zero, @@f3d_o3_04001804
vmadm $v18, $v31, $v31[0]
vmulf $v7, $v18, $v18
vmulf $v7, $v7, $v18
vmulf $v20, $v7, $v6[1]
vmacf $v20, $v7, $v6[3]
vmacf $v18, $v18, $v6[2]
@@f3d_o3_04001804:
j @f3d_040015e4
vadd $v18, $v18, $v31[4]
@init_lights:
andi $1, $1, 0x0fff
sw $1, numLights
jal f3d_04001524
addi $8, $zero, modelViewMatrixStack
ori $8, $zero, scratchSpace
stv $v8[2], 0x10($8) // transpose
stv $v8[4], 0x20($8)
stv $v8[12], 0x30($8)
stv $v8[14], 0x40($8)
ltv $v8[14], 0x10($8)
ltv $v8[12], 0x20($8)
ltv $v8[4], 0x30($8)
ltv $v8[2], 0x40($8)
sdv $v12[8], 0x10($8)
sdv $v13[8], 0x20($8)
sdv $v14[8], 0x30($8)
ldv $v12[0], 0x10($8)
ldv $v13[0], 0x20($8)
ldv $v14[0], 0x30($8)
f3d_04001858:
lpv $v5[0], 0x01b8($1) // this light's dir vector
vmulf $v5, $v5, $v31[4]
vmudn $v6, $v12, $v5[0h]
vmadn $v6, $v13, $v5[1h]
vmadn $v6, $v14, $v5[2h]
vmadm $v3, $v31, $v31[0]
vmudm $v6, $v3, $v31[2]
vmacf $v3, $v8, $v5[0h]
vmacf $v3, $v9, $v5[1h]
vmacf $v3, $v10, $v5[2h]
vmadn $v6, $v31, $v31[0]
vmudl $v5, $v6, $v6
vmadm $v5, $v3, $v6
vmadn $v5, $v6, $v3
vmadh $v26, $v3, $v3
vaddc $v7, $v5, $v5[1q]
vadd $v4, $v26, $v26[1q]
vaddc $v7, $v5, $v7[0h]
vadd $v4, $v26, $v4[0h]
vrsqh $v11[0], $v4[2] // normalize vector
vrsql $v15[0], $v7[2]
vrsqh $v11[0], $v31[0]
vmudl $v15, $v15, $v30[3]
vmadm $v11, $v11, $v30[3]
vmadn $v15, $v31, $v31[0]
vmudl $v7, $v6, $v15[0]
vmadm $v7, $v3, $v15[0]
vmadn $v7, $v6, $v11[0]
vmadh $v4, $v3, $v11[0]
vmadn $v7, $v31, $v31[0]
ldv $v2[0], 0xf8($29)
vge $v7, $v7, $v2[0]
vlt $v7, $v7, $v2[1]
vmudn $v7, $v7, $v2[2]
spv $v7[0], 0x01c0($1)
lw $8, 0x01c0($1)
sw $8, 0x01c4($1)
bgtz $1, f3d_04001858
addi $1, $1, -0x20
j load_mp_matrix
lh $ra, lightEntry
nop
Overlay3End:
// Overlay 4
.headersize 0x04001768 - orga()
Overlay4Address:
j f3d_04001788
nop
overlay_4_entry:
nop
jal wait_while_dma_busy
ori $2, $zero, 0x4000
mtc0 $2, SP_STATUS
break
nop
f3d_04001788:
ori $2, $zero, 0x1000
sw $28, data08E4
sw $27, data08E8
sw $26, data08EC
sw $23, data08F0
lw $19, dramPtr
ori $20, $zero, 0x0000
ori $18, $zero, 0x08ff
jal dma_read_write
ori $17, $zero, 0x0001
jal wait_while_dma_busy
nop
j f3d_040010c8
mtc0 $2, SP_STATUS
nop
nop
addiu $zero, $zero, 0xbeef
nop
Overlay4End:
.close // CODE_FILE
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