AstralTransRocketries/ClassiCube
1
0
Fork 0
mirror of https://github.com/ClassiCube/ClassiCube.git synced 2025-09-08 06:47:23 -04:00
Code Issues Packages Projects Releases Wiki Activity

Dreamcast: Optimise a little bit more, but clipped vertices still aren't right

Browse Source
This commit is contained in:
UnknownShadow200 2024-07-08 00:00:06 +10:00
parent 333f0e5c9b
commit 97e3d016f4
3 changed files with 19 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
misc/dreamcast/Makefile
View File

@ -5,7 +5,7 @@ TARGET := ClassiCube-dc
S_FILES := $(foreach dir,$(SOURCE_DIRS),$(wildcard $(dir)/*.S))
C_FILES := $(foreach dir,$(SOURCE_DIRS),$(wildcard $(dir)/*.c))
OBJS := $(addprefix $(BUILD_DIR)/, $(notdir $(C_FILES:%.c=%.o) $(S_FILES:%.S=%.o)))
CFLAGS := -g -DNDEBUG -O3 -fipa-pta -fno-pie -flto=auto -fomit-frame-pointer -fbuiltin -ffast-math -ffp-contract=fast -mfsrra -mfsca -pipe -fno-math-errno -Ithird_party/bearssl/inc
CFLAGS := -g -O2 -fno-pie -fomit-frame-pointer -fbuiltin -ffast-math -ffp-contract=fast -mfsrra -mfsca -pipe -fno-math-errno -Ithird_party/bearssl/inc
# Dependency tracking
DEPFLAGS = -MT $@ -MMD -MP -MF $(BUILD_DIR)/$*.d

4
misc/dreamcast/VertexClip.S
View File

@ -122,11 +122,11 @@ _ClipLine:
fmov.s fr3,@OUT ! LS, OUT->w = lerp
add #-4, OUT ! EX, OUT -= 4
mov.l @IN1+,CL1 ! LS, ACOLOR = v1->bgra
mov.l @IN1,CL1 ! LS, ACOLOR = v1->bgra
extu.b CL1,TM1 ! EX, val = ACOLOR.b
lds TM1,fpul ! CO, FPUL = val
float fpul,fr2 ! EX, fr2 = float(FPUL)
mov.l @IN2+,CL2 ! LS, BCOLOR = v2->bgra
mov.l @IN2,CL2 ! LS, BCOLOR = v2->bgra
extu.b CL2,TM1 ! EX, val = BCOLOR.b
lds TM1,fpul ! CO, FPUL = val
float fpul,fr3 ! EX, fr3 = float(FPUL)

30
misc/dreamcast/VertexDraw.S
View File

@ -98,7 +98,7 @@
add #-28, \R ! EX, SRC -= 28
mov.l @\R+, r2 ! LS, tmp = SRC->flags, SRC += 4
mov.l r2,@r8 ! LS, DST->flags = tmp
fsrra fr0 ! FE, fr0 = 1 / sqrt(fr0) -> 1 / vertex->w
fsrra fr0 ! FE, invW = 1 / sqrt(SRC->W * SRC->W)
add #4, r8 ! EX, DST += 4
! COPY U,V
@ -113,24 +113,22 @@
fmul F_HW,fr4 ! FE, fr4 = VIEWPORT_HWIDTH * SRC->x
mov.l @(20,\R),r2 ! LS, tmp = SRC->bgra
mov.l r2,@(20,r8) ! LS, SRC->bgra = tmp
fmac fr0,fr4,fr5 ! FE, fr5 = fr0 * fr4 + fr5 -- (X * F * hwidth) + x_plus_hwidth
fmac fr0,fr4,fr5 ! FE, fr5 = invW * fr4 + fr5 -- (X * F * hwidth) + x_plus_hwidth
add #4, \R ! EX, SRC += 4
fmov.s fr5,@r8 ! LS, DST->x = fr5
! TRANSFORM Y
fmov.s @\R,fr4 ! LS, fr4 = vertex->y
fmov.s @\R,fr4 ! LS, fr4 = SRC->y
fmov F_YP,fr5 ! LS, fr5 = VIEWPORT_Y_PLUS_HHEIGHT
fmul F_HH,fr4 ! FE, fr4 = VIEWPORT_HHEIGHT * vertex->y
fmac fr0,fr4,fr5 ! FE, fr5 = fr0 * fr4 + fr5 -- (Y * F * hheight) + y_plus_hheight
add #4, r8 ! EX, DST += 4
fmul F_HH,fr4 ! FE, fr4 = VIEWPORT_HHEIGHT * SRC->y
add #8, r8 ! EX, DST += 8
fmov.s fr0,@r8 ! LS, DST->z = invW
fmac fr0,fr4,fr5 ! FE, fr5 = invW * fr4 + fr5 -- (Y * F * hheight) + y_plus_hheight
add #-4, r8 ! EX, DST -= 4
add #-8, \R ! EX, src -= 8 (back to start of vertex)
fmov.s fr5,@r8 ! LS, DST->y = fr5
! ASSIGN Z
add #4, r8 ! EX, DST += 4
fmov.s fr0,@r8 ! LS, DST->z = fr0
add #-12,r8 ! EX, DST -= 12 (back to start of vertex)
add #-8,r8 ! EX, DST -= 8 (back to start of vertex)
pref @r8 ! LS, Trigger SQ
add #32,r8 ! EX, SQ += 32
.endm
@ -668,21 +666,25 @@ NEXT_ITER:
.CLIPFUNC:
.long _ClipLine
BUGGY_CASE:
rts
nop
! CASES table holds the functions to transfer a quad,
! based on the visibility clipflags of the 4 vertices
! e.g. CASES[15] = V0_VIS | V1_VIS | V2_VIS | V3_VIS (all 4 visible)
.CASES:
.long _arch_exit ! Should never happen
.long BUGGY_CASE ! Should never happen
.long _Case_0_0_0_1
.long _Case_0_0_1_0
.long _Case_0_0_1_1
.long _Case_0_1_0_0
.long _arch_exit ! V0_VIS | V2_VIS, Should never happen
.long BUGGY_CASE ! V0_VIS | V2_VIS, Should never happen
.long _Case_0_1_1_0
.long _Case_0_1_1_1
.long _Case_1_0_0_0
.long _Case_1_0_0_1
.long _arch_exit ! V1_VIS | V3_VIS, Should never happen
.long BUGGY_CASE ! V1_VIS | V3_VIS, Should never happen
.long _Case_1_0_1_1
.long _Case_1_1_0_0
.long _Case_1_1_0_1