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PS2: Tidy up assembly
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misc/ps2/DrawColoured.S
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misc/ps2/DrawColoured.S
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@ -1,12 +1,3 @@
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# REGISTER USAGE
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# vf0 = hardware coded to (0,0,0,1)
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# vf1 = mvp.row1
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# vf2 = mvp.row2
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# vf3 = mvp.row3
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# vf4 = mvp.row4
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# vf5 = clipping scale adjustments to match guardbands
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# vf6 = viewport origin
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# vf7 = viewport scale
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# NOTE: vclipw.xyz takes 4 cycles to produce result, which must be accounted for
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.macro FUNC name
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@ -19,98 +10,115 @@
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# (i.e. instruction after branches/jumps are always unconditionally executed)
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.set noreorder
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# global registers
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#define V0001 $vf0 // hardware coded to (0,0,0,1)
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#define MVP1 $vf1 // mvp.row1
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#define MVP2 $vf2 // mvp.row2
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#define MVP3 $vf3 // mvp.row3
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#define MVP4 $vf4 // mvp.row4
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#define CL_F $vf5 // clipping scale adjustments to match guardbands
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#define VP_O $vf6 // viewport origin
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#define VP_S $vf7 // viewport scale
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# transform temp registers
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#define POSCL $vf10 // TRANSFORMED(POS_[1234]) * CLIP_PLANES_ADJUST
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#define POS_1 $vf11 // vertex 1 position
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#define POS_2 $vf12 // vertex 2 position
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#define POS_3 $vf13 // vertex 3 position
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#define POS_4 $vf14 // vertex 4 position
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.align 4
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# Loads matrix into VU0 registers
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# $a0 = addresss of mvp
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FUNC LoadMvpMatrix
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lqc2 $vf1, 0x00($a0) # vf1 = mvp.row1
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lqc2 $vf2, 0x10($a0) # vf2 = mvp.row2
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lqc2 $vf3, 0x20($a0) # vf3 = mvp.row3
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lqc2 MVP1, 0x00($a0) # vf1 = mvp.row1
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lqc2 MVP2, 0x10($a0) # vf2 = mvp.row2
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lqc2 MVP3, 0x20($a0) # vf3 = mvp.row3
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jr $ra
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lqc2 $vf4, 0x30($a0) # vf4 = mvp.row4
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lqc2 MVP4, 0x30($a0) # vf4 = mvp.row4
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# Loads clipping scaling factors into VU0 registers
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# $a0 = addresss of factors
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FUNC LoadClipScaleFactors
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jr $ra
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lqc2 $vf5, 0x00($a0) # vf5 = factors
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lqc2 CL_F, 0x00($a0)
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# Loads viewport origin into VU0 registers
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# $a0 = addresss of origin
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FUNC LoadViewportOrigin
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jr $ra
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lqc2 $vf6, 0x00($a0) # vf6 = origin
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lqc2 VP_O, 0x00($a0)
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# Loads viewport scale into VU0 registers
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# $a0 = addresss of scale
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FUNC LoadViewportScale
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jr $ra
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lqc2 $vf7, 0x00($a0) # vf7 = scale
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lqc2 VP_S, 0x00($a0)
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.macro TransformVertex1
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# LOAD VERTEX 1
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lqc2 $vf10, 0x00($a2) # IN = tmp
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lqc2 POS_1, 0x00($a2) # IN = tmp
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# TRANSFORM VERTEX 1
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vmulaw $ACC, $vf4, $vf0 # ACC[xyzw] = mvp.row3[xyzw] * 1.0f; (vf0.w is 1)
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vmaddax $ACC, $vf1, $vf10 # ACC[xyzw] = ACC[xyzw] + mvp.row0[xyzw] * IN.x
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vmadday $ACC, $vf2, $vf10 # ACC[xyzw] = ACC[xyzw] + mvp.row1[xyzw] * IN.y
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vmaddz $vf11, $vf3, $vf10 # OUT[xyzw] = ACC[xyzw] + mvp.row2[xyzw] * IN.z
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sqc2 $vf11, 0x00($a1) # dst[0] = TRANSFORMED(V0)
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vmul $vf10, $vf11, $vf5 # TMP = TRANSFORMED(V0) * CLIP_PLANES_ADJUST
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vmulaw $ACC, MVP4, V0001 # ACC[xyzw] = mvp.row3[xyzw] * 1.0f; (vf0.w is 1)
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vmaddax $ACC, MVP1, POS_1 # ACC[xyzw] = ACC[xyzw] + mvp.row0[xyzw] * IN.x
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vmadday $ACC, MVP2, POS_1 # ACC[xyzw] = ACC[xyzw] + mvp.row1[xyzw] * IN.y
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vmaddz POS_1, MVP3, POS_1 # OUT[xyzw] = ACC[xyzw] + mvp.row2[xyzw] * IN.z
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sqc2 POS_1, 0x00($a1) # dst[0] = TRANSFORMED(V0)
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vmul POSCL, POS_1, CL_F # TMP = TRANSFORMED(V0) * CLIP_PLANES_ADJUST
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# BEGIN CLIP FLAGS CALCULATION VERTEX 1
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vclipw.xyz $vf10, $vf10 # CLIP_FLAGS.append(CLIP(TMP.xyz, TMP.w))
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vclipw.xyz POSCL, POSCL # CLIP_FLAGS.append(CLIP(TMP.xyz, TMP.w))
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.endm
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.macro TransformVertex2
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# LOAD VERTEX 2
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lqc2 $vf12, 0x00($a2) # IN = tmp
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lqc2 POS_2, 0x00($a2) # IN = tmp
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# TRANSFORM VERTEX 2
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vmulaw $ACC, $vf4, $vf0 # ACC[xyzw] = mvp.row3[xyzw] * 1.0f; (vf0.w is 1)
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vmaddax $ACC, $vf1, $vf12 # ACC[xyzw] = ACC[xyzw] + mvp.row0[xyzw] * IN.x
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vmadday $ACC, $vf2, $vf12 # ACC[xyzw] = ACC[xyzw] + mvp.row1[xyzw] * IN.y
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vmaddz $vf13, $vf3, $vf12 # OUT[xyzw] = ACC[xyzw] + mvp.row2[xyzw] * IN.z
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sqc2 $vf13, 0x10($a1) # dst[1] = TRANSFORMED(V1)
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vmul $vf12, $vf13, $vf5 # TMP = TRANSFORMED(V1) * CLIP_PLANES_ADJUST
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vmulaw $ACC, MVP4, V0001 # ACC[xyzw] = mvp.row3[xyzw] * 1.0f; (vf0.w is 1)
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vmaddax $ACC, MVP1, POS_2 # ACC[xyzw] = ACC[xyzw] + mvp.row0[xyzw] * IN.x
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vmadday $ACC, MVP2, POS_2 # ACC[xyzw] = ACC[xyzw] + mvp.row1[xyzw] * IN.y
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vmaddz POS_2, MVP3, POS_2 # OUT[xyzw] = ACC[xyzw] + mvp.row2[xyzw] * IN.z
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sqc2 POS_2, 0x10($a1) # dst[1] = TRANSFORMED(V1)
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vmul POSCL, POS_2, CL_F # TMP = TRANSFORMED(V1) * CLIP_PLANES_ADJUST
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# STORE CLIP FLAGS VERTEX 1 RESULT
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cfc2 $t0, $18 # t0 = VP0_REGS[CLIP_FLAGS]
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sw $t0,0x00($a3) # clip_flags[0] = t0
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# BEGIN CLIP FLAGS CALCULATION VERTEX 2
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vclipw.xyz $vf12, $vf12 # CLIP_FLAGS.append(CLIP(TMP.xyz, TMP.w))
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vclipw.xyz POSCL, POSCL # CLIP_FLAGS.append(CLIP(TMP.xyz, TMP.w))
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.endm
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.macro TransformVertex3
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# LOAD VERTEX 3
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lqc2 $vf14, 0x00($a2) # IN = tmp
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lqc2 POS_3, 0x00($a2) # IN = tmp
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# TRANSFORM VERTEX 3
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vmulaw $ACC, $vf4, $vf0 # ACC[xyzw] = mvp.row3[xyzw] * 1.0f; (vf0.w is 1)
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vmaddax $ACC, $vf1, $vf14 # ACC[xyzw] = ACC[xyzw] + mvp.row0[xyzw] * IN.x
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vmadday $ACC, $vf2, $vf14 # ACC[xyzw] = ACC[xyzw] + mvp.row1[xyzw] * IN.y
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vmaddz $vf15, $vf3, $vf14 # OUT[xyzw] = ACC[xyzw] + mvp.row2[xyzw] * IN.z
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sqc2 $vf15, 0x20($a1) # dst[2] = TRANSFORMED(V2)
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vmul $vf14, $vf15, $vf5 # TMP = TRANSFORMED(V2) * CLIP_PLANES_ADJUST
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vmulaw $ACC, MVP4, V0001 # ACC[xyzw] = mvp.row3[xyzw] * 1.0f; (vf0.w is 1)
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vmaddax $ACC, MVP1, POS_3 # ACC[xyzw] = ACC[xyzw] + mvp.row0[xyzw] * IN.x
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vmadday $ACC, MVP2, POS_3 # ACC[xyzw] = ACC[xyzw] + mvp.row1[xyzw] * IN.y
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vmaddz POS_3, MVP3, POS_3 # OUT[xyzw] = ACC[xyzw] + mvp.row2[xyzw] * IN.z
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sqc2 POS_3, 0x20($a1) # dst[2] = TRANSFORMED(V2)
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vmul POSCL, POS_3, CL_F # TMP = TRANSFORMED(V2) * CLIP_PLANES_ADJUST
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# STORE CLIP FLAGS VERTEX 2 RESULT
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cfc2 $t0, $18 # t0 = VP0_REGS[CLIP_FLAGS]
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sw $t0,0x04($a3) # clip_flags[1] = t0
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# BEGIN CLIP FLAGS CALCULATION VERTEX 3
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vclipw.xyz $vf14, $vf14 # CLIP_FLAGS.append(CLIP(TMP.xyz, TMP.w))
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vclipw.xyz POSCL, POSCL # CLIP_FLAGS.append(CLIP(TMP.xyz, TMP.w))
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.endm
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.macro TransformVertex4
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# LOAD VERTEX 4
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lqc2 $vf16, 0x00($a2) # IN = tmp
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lqc2 POS_4, 0x00($a2) # IN = tmp
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# TRANSFORM VERTEX 4
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vmulaw $ACC, $vf4, $vf0 # ACC[xyzw] = mvp.row3[xyzw] * 1.0f; (vf0.w is 1)
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vmaddax $ACC, $vf1, $vf16 # ACC[xyzw] = ACC[xyzw] + mvp.row0[xyzw] * IN.x
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vmadday $ACC, $vf2, $vf16 # ACC[xyzw] = ACC[xyzw] + mvp.row1[xyzw] * IN.y
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vmaddz $vf17, $vf3, $vf16 # OUT[xyzw] = ACC[xyzw] + mvp.row2[xyzw] * IN.z
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vmul $vf16, $vf17, $vf5 # TMP = TRANSFORMED(V3) * CLIP_PLANES_ADJUST
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vmulaw $ACC, MVP4, V0001 # ACC[xyzw] = mvp.row3[xyzw] * 1.0f; (vf0.w is 1)
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vmaddax $ACC, MVP1, POS_4 # ACC[xyzw] = ACC[xyzw] + mvp.row0[xyzw] * IN.x
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vmadday $ACC, MVP2, POS_4 # ACC[xyzw] = ACC[xyzw] + mvp.row1[xyzw] * IN.y
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vmaddz POS_4, MVP3, POS_4 # OUT[xyzw] = ACC[xyzw] + mvp.row2[xyzw] * IN.z
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vmul POSCL, POS_4, CL_F # TMP = TRANSFORMED(V3) * CLIP_PLANES_ADJUST
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# STORE CLIP FLAGS VERTEX 3 RESULT
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cfc2 $t0, $18 # t0 = VP0_REGS[CLIP_FLAGS]
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sw $t0,0x08($a3) # clip_flags[2] = t0
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# BEGIN CLIP FLAGS CALCULATION VERTEX 4
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vclipw.xyz $vf16, $vf16 # CLIP_FLAGS.append(CLIP(TMP.xyz, TMP.w))
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vclipw.xyz POSCL, POSCL # CLIP_FLAGS.append(CLIP(TMP.xyz, TMP.w))
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.endm
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.macro TransformFinish
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@ -121,9 +129,9 @@ FUNC LoadViewportScale
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# dst[3] = V2
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# dst[4] = V3
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# dst[5] = V0
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sqc2 $vf15, 0x30($a1) # dst[3] = TRANSFORMED(V2)
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sqc2 $vf17, 0x40($a1) # dst[4] = TRANSFORMED(V3)
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sqc2 $vf11, 0x50($a1) # dst[5] = TRANSFORMED(V0)
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sqc2 POS_3, 0x30($a1) # dst[3] = TRANSFORMED(V2)
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sqc2 POS_4, 0x40($a1) # dst[4] = TRANSFORMED(V3)
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sqc2 POS_1, 0x50($a1) # dst[5] = TRANSFORMED(V0)
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vnop # adjust for delay
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# STORE CLIP FLAGS 4 RESULT
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@ -211,8 +219,8 @@ FUNC TransformColouredQuad
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FUNC ViewportTransform
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lqc2 $vf16, 0x00($a0) # IN = src
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vmulw $vf17, $vf16, $vf16 # TMP = IN[xyzw] * IN.w (inverse W)
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vmul $vf18, $vf17, $vf7 # TMP = TMP * viewport_scale
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vadd $vf19, $vf18, $vf6 # TMP = TMP + viewport_origin
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vmul $vf18, $vf17, VP_S # TMP = TMP * viewport_scale
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vadd $vf19, $vf18, VP_O # TMP = TMP + viewport_origin
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vftoi0 $vf19, $vf19 # TMP = int(TMP)
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jr $ra
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sqc2 $vf19, 0x00($a1) # dst = TMP
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