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Dreamcast: Optimise vertex transform by a couple of cycles
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UnknownShadow200
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commit
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@ -7,13 +7,10 @@ _DrawColouredQuads:
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! Setup
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fldi0 fr1 ! U = 0
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fldi0 fr2 ! V = 0
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mov r4,r3 ! r3 = src
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add #-32, r5 ! r5 -= sizeof(VERTEX)
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TransformSetup
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ViewportTransformSetup _VP_COL_HWIDTH
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.TRANSFORM_QUAD:
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mov.l CMD_COL_VERT, r1 ! r1 = GPU VERT command
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LoadColouredVertex
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ProcessVertex1
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@ -24,7 +21,7 @@ _DrawColouredQuads:
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ProcessVertex3
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LoadColouredVertex
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ProcessVertex4 CMD_COL_EOS
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ProcessVertex4
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! CLIPFLAGS TESTING
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cmp/eq #0,r0 ! T = r0 == 0 (all points invisible)
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@ -44,13 +41,9 @@ _DrawColouredQuads:
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bf .TRANSFORM_QUAD ! if !T then goto TRANSFORM_QUAD
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nop
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add #32, r5 ! r5 += sizeof(VERTEX)
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rts ! return after executing instruction in delay slot
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mov r5,r0 ! r0 = r5
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TransformEnd
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.align 2
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CMD_COL_VERT: .long 0xe0000000
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CMD_COL_EOS: .long 0xf0000000
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.align 4
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.global _VP_COL_HWIDTH
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_VP_COL_HWIDTH: .long 0
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@ -5,13 +5,10 @@
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_DrawTexturedQuads:
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! Setup
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mov r4,r3 ! r3 = src
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add #-32, r5 ! r5 -= sizeof(VERTEX)
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TransformSetup
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ViewportTransformSetup _VP_TEX_HWIDTH
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.TRANSFORM_QUAD:
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mov.l CMD_TEX_VERT, r1 ! r1 = GPU VERT command
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LoadTexturedVertex
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ProcessVertex1
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@ -22,7 +19,7 @@ _DrawTexturedQuads:
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ProcessVertex3
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LoadTexturedVertex
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ProcessVertex4 CMD_TEX_EOS
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ProcessVertex4
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! CLIPFLAGS TESTING
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cmp/eq #0,r0 ! T = r0 == 0 (all points invisible)
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@ -42,13 +39,9 @@ _DrawTexturedQuads:
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bf .TRANSFORM_QUAD ! if !T then goto TRANSFORM_QUAD
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nop
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add #32, r5 ! r5 += sizeof(VERTEX)
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rts ! return after executing instruction in delay slot
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mov r5,r0 ! r0 = r5
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TransformEnd
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.align 2
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CMD_TEX_VERT: .long 0xe0000000
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CMD_TEX_EOS: .long 0xf0000000
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.align 4
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.global _VP_TEX_HWIDTH
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_VP_TEX_HWIDTH: .long 0
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@ -3,8 +3,8 @@
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! =========================================================
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! The SH4 can dual issue (i.e. parallel execution) two instructions
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! as long as the groups of the two instructions are different:
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! * LS - most APU and FPU register load/stores
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! * EX - most APU arithmetic instructions
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! * LS - most ALU and FPU register load/stores
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! * EX - most ALU arithmetic instructions
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! * MT - TST, CMP, NOP, MOV Rm,Rn
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! * FE - most FPU arithmetic instructions
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! * CO - other instructions (NOTE: Cannot be exeucted in parallel)
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@ -14,7 +14,6 @@
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! * Latency: Interval between the issue of an instruction and the generation of its result (completion)
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! * Latency is also the interval between the execution of two instructions with an interdependent relationship.
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! (although different cases may either increase or decrease Latency)
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!
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! =========================================================
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@ -38,6 +37,8 @@
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!r5 = dst pointer ARG
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!r6 = quads count ARG
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!r7 = ?
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!r10 = PVR_CMD_VERTEX
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!r11 = PVR_CMD_VERTEX_EOL
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!fr0 = temp
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!fr1 = u
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@ -55,6 +56,34 @@
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!fv4 = XYZW
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! =========================================================
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! ========================= TRANSFORM SETUP ===============
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! =========================================================
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.macro TransformSetup
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mov r4,r3 ! MT, r3 = src
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mov.l r10, @-r15 ! LS, push(r10)
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add #-32, r5 ! EX, r5 -= sizeof(VERTEX)
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mov.l r11, @-r15 ! LS, push(r11)
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mov #0xE0, r10 ! EX, r10 = 0x00 00 00 E0
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pref @r3 ! LS, PREFETCH r3 (first vertex)
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shll16 r10 ! EX, r10 = 0x00 E0 00 00
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shll8 r10 ! EX, r10 = 0xE0 00 00 00 (PVR_CMD_VERTEX)
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mov #0xF0, r11 ! EX, r11 = 0x00 00 00 F0
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shll16 r11 ! EX, r11 = 0x00 F0 00 00
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shll8 r11 ! EX, r11 = 0xF0 00 00 00 (PVR_CMD_VERTEX_EOL)
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nop ! MT, align to even boundary
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.endm
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.macro TransformEnd
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mov.l @r15+, r11 ! LS, pop(r11)
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mov.l @r15+, r10 ! LS, pop(r10)
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add #32, r5 ! EX, r5 += sizeof(VERTEX)
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rts ! CO, return after executing instruction in delay slot
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mov r5,r0 ! MT, r0 = r5
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.endm
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! =========================================================
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! ========================= VERTEX LOADING ================
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! =========================================================
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@ -108,7 +137,7 @@
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fmov.s fr6,@-r5 ! LS, dst->z = Z
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fmov.s fr5,@-r5 ! LS, dst->y = Y
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fmov.s fr4,@-r5 ! LS, dst->x = X
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mov.l r1,@-r5 ! LS, dst->flags = CMD_VERT
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mov.l r10,@-r5 ! LS, dst->flags = PVR_CMD_VERTEX
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.endm
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.macro ProcessVertex2
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@ -124,7 +153,7 @@
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fmov.s fr5,@-r5 ! LS, dst->y = Y
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or r2,r0 ! EX, CLIPFLAGS |= tmp (T << 1)
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fmov.s fr4,@-r5 ! LS, dst->x = X
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mov.l r1,@-r5 ! LS, dst->flags = CMD_VERT
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mov.l r10,@-r5 ! LS, dst->flags = PVR_CMD_VERTEX
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.endm
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.macro ProcessVertex3
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@ -140,11 +169,12 @@
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shll2 r2 ! EX, tmp = tmp << 2
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fmov.s fr4,@-r5 ! LS, dst->x = X
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or r2,r0 ! EX, CLIPFLAGS |= tmp (T << 2)
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mov.l r1,@-r5 ! LS, dst->flags = CMD_VERT
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mov.l r10,@-r5 ! LS, dst->flags = PVR_CMD_VERTEX
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.endm
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.macro ProcessVertex4 eos_addr
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.macro ProcessVertex4
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fmov.s fr7,@-r5 ! LS, dst->w = W
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or r11,r0 ! EX, CLIPFLAGS |= PVR_CMD_VERTEX_EOL
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fmov.s fr3,@-r5 ! LS, dst->c = C
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fneg fr7 ! LS, W = -W
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fmov.s fr2,@-r5 ! LS, dst->v = V
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@ -154,12 +184,10 @@
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fmov.s fr6,@-r5 ! LS, dst->z = Z
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shll2 r2 ! EX, tmp = tmp << 2
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fmov.s fr5,@-r5 ! LS, dst->y = Y
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add r2,r2 ! EX, tmp = (tmp << 2) + (tmp << 2)
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add r2,r2 ! EX, tmp = (tmp << 2) + (tmp << 2) (T << 3)
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fmov.s fr4,@-r5 ! LS, dst->x = X
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mov.l \eos_addr, r1 ! LS, r1 = GPU EOS command
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or r2,r0 ! EX, CLIPFLAGS |= tmp (T << 3)
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or r0,r1 ! EX, r1 |= CLIPFLAGS
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mov.l r1,@-r5 ! LS, dst->flags = GPU EOS | CLIPFLAGS
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mov.l r0,@-r5 ! LS, dst->flags = PVR_CMD_VERTEX_EOL | CLIPFLAGS
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.endm
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@ -156,7 +156,7 @@ Although the regular linux compiliation flags will work fine, to take full advan
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## Compiling - macOS
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```cc -fno-math-errno *.c interop_cocoa.m -o ClassiCube -framework Cocoa -framework OpenGL -framework IOKit -lobjc```
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```cc -fno-math-errno *.c Window_cocoa.m -o ClassiCube -framework Cocoa -framework OpenGL -framework IOKit -lobjc```
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Note: You may need to install Xcode before you can compile ClassiCube
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