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https://github.com/ClassiCube/ClassiCube.git
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Dreamcast: Few minor assembly improvements
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UnknownShadow200
parent
8831f6a589
commit
06ac94db53
2
.github/workflows/build_dreamcast.yml
vendored
2
.github/workflows/build_dreamcast.yml
vendored
@ -20,12 +20,12 @@ jobs:
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- uses: actions/checkout@v4
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- name: Compile Dreamcast build
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id: compile
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shell: bash
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run: |
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apt-get update
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apt-get -y install genisoimage
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wget https://github.com/ClassiCube/rpi-compiling-stuff/raw/main/cdi4dc -O /opt/toolchains/dc/kos/utils/cdi4dc
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chmod +x /opt/toolchains/dc/kos/utils/cdi4dc
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source /opt/toolchains/dc/kos/environ.sh
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export PATH=/opt/toolchains/dc/kos/utils/:$PATH
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make dreamcast
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@ -2,10 +2,19 @@
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! r1 CLOBBERS
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! r2 CLOBBERS
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! r3 CLOBBERS
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! r7 CLOBBERS
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! r4 = v1
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! r5 = v2
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! r6 = OUT
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#define TM1 r1
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#define TM2 r3
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#define TM3 r7
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#define IN1 r4
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#define IN2 r5
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#define OUT r6
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! FR0 = 0
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! FR1 = 0
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! FR2 = A.1
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@ -48,13 +57,13 @@
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.align 4
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.type _ClipLine,%function
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_ClipLine:
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mov r4, r1 ! MT, r1 = &v1
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mov IN1, TM1 ! MT, tmp = &v1
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fldi0 fr4 ! LS, fr4 = 0
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add #12, r1 ! EX, r1 = &v1->z
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add #12, TM1 ! EX, tmp = &v1->z
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fmov.s @r1, fr2 ! LS, fr2 = v1->z
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mov r5, r1 ! MT, r1 = &v2
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mov IN2, TM1 ! MT, tmp = &v2
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fldi0 fr5 ! LS, fr5 = 0
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add #12, r1 ! EX, r1 = &v2->z
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add #12, TM1 ! EX, tmp = &v2->z
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fmov.s @r1,fr11 ! LS, fr11 = v2->z
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fsub fr2,fr11 ! FE, fr11 = v2->z - v1->z
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fldi0 fr8 ! LS, fr8 = 0
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@ -65,46 +74,46 @@ _ClipLine:
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fsrra fr11 ! FE, fr11 = 1 / abs(v2->z - v1->z)
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fabs fr2 ! LS, fr2 = abs(v1->z)
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fmul fr2,fr11 ! FE, fr11 = abs(v1->Z) / abs(v2->z - v1->z) --> t
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add #4, r4 ! EX, A = &v1->x
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add #4, IN1 ! EX, A = &v1->x
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fldi1 fr10 ! LS, fr10 = 1
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add #4, r5 ! EX, B = &v2->x
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add #4, r6 ! EX, OUT = &OUT->x
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add #4, IN2 ! EX, B = &v2->x
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add #4, OUT ! EX, OUT = &OUT->x
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fsub fr11,fr10 ! FE, fr10 = 1.0 - t --> invT
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fmov.s @r4+, fr2 ! LS, A1 = v1->x
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fmov.s @r5+, fr3 ! LS, B1 = v2->x
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fmov.s @IN1+, fr2 ! LS, A1 = v1->x
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fmov.s @IN2+, fr3 ! LS, B1 = v2->x
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fipr fv8, fv0 ! FE, LERP(A1, B1)
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fmov.s @r4+, fr6 ! LS, A2 = v1->y
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fmov.s @r5+, fr7 ! LS, B2 = v2->y
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fmov.s @IN1+, fr6 ! LS, A2 = v1->y
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fmov.s @IN2+, fr7 ! LS, B2 = v2->y
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fmov.s fr3, @r6 ! LS, OUT->x = LERP
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add #4, r6 ! EX, OUT += 4
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fmov.s fr3,@OUT ! LS, OUT->x = LERP
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add #4, OUT ! EX, OUT += 4
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fipr fv8, fv4 ! FE, LERP(A2, B2)
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add #4, r4 ! EX, v1 += 4
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add #4, r5 ! EX, v2 += 4
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add #4, IN1 ! EX, v1 += 4
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add #4, IN2 ! EX, v2 += 4
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fmov.s fr7, @r6 ! LS, OUT->y = LERP
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add #4, r6 ! EX, OUT += 4
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fmov.s fr1, @r6 ! LS, OUT->z = 0
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add #4, r6 ! EX, OUT += 4
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fmov.s fr7,@OUT ! LS, OUT->y = LERP
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add #4, OUT ! EX, OUT += 4
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fmov.s fr1,@OUT ! LS, OUT->z = 0
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add #4, OUT ! EX, OUT += 4
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fmov.s @r4+, fr2 ! LS, A1 = v1->u
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fmov.s @r5+, fr3 ! LS, B1 = v2->u
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fmov.s @IN1+, fr2 ! LS, A1 = v1->u
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fmov.s @IN2+, fr3 ! LS, B1 = v2->u
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fipr fv8, fv0 ! FE, LERP(A1, B1)
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fmov.s @r4+, fr6 ! LS, A2 = v1->v
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fmov.s @r5+, fr7 ! LS, B2 = v2->v
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fmov.s @IN1+, fr6 ! LS, A2 = v1->v
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fmov.s @IN2+, fr7 ! LS, B2 = v2->v
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fmov.s fr3, @r6 ! LS, OUT->u = LERP
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add #4, r6 ! EX, OUT += 4
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fmov.s fr3,@OUT ! LS, OUT->u = LERP
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add #4, OUT ! EX, OUT += 4
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fipr fv8, fv4 ! FE, LERP(A2, B2)
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fmov.s fr7, @r6 ! LS, OUT->v = LERP
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add #4, r6 ! EX, OUT += 4
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fmov.s fr7,@OUT ! LS, OUT->v = LERP
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add #4, OUT ! EX, OUT += 4
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mov.l @r4+,r0 ! LS, ACOLOR = v1->bgra
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mov.l @IN1+,r0 ! LS, ACOLOR = v1->bgra
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extu.b r0,r1 ! EX, tmp = ACOLOR.b
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lds r1,fpul ! CO, FPUL = tmp
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float fpul,fr2 ! EX, fr2 = float(FPUL)
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mov.l @r5+,r2 ! LS, BCOLOR = v2->bgra
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mov.l @IN2+,r2 ! LS, BCOLOR = v2->bgra
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extu.b r2,r3 ! EX, tmp = BCOLOR.b
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lds r3,fpul ! CO, FPUL = tmp
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float fpul,fr3 ! EX, fr3 = float(FPUL)
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@ -159,11 +168,11 @@ _ClipLine:
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shll16 r3 ! EX, tmp <<= 16
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shll8 r3 ! EX, tmp <<= 8
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or r3,r7 ! EX, OUTCOLOR.a |= tmp
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mov.l r7, @r6 ! LS, OUT->color = OUTCOLOR
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mov.l r7,@OUT ! LS, OUT->color = OUTCOLOR
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fmov.s @r4+,fr2 ! LS, A1 = v1->w
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fmov.s @r5+,fr3 ! LS, B1 = v2->w
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fmov.s @IN1+,fr2 ! LS, A1 = v1->w
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fmov.s @IN2+,fr3 ! LS, B1 = v2->w
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fipr fv8, fv0 ! FE, LERP(A1, B1)
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add #4, r6 ! EX, OUT += 4
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add #4, OUT ! EX, OUT += 4
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rts ! CO, return after executing instruction in delay slot
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fmov.s fr3, @r6 ! LS, OUT->w = lerp
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fmov.s fr3,@OUT ! LS, OUT->w = lerp
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@ -2,7 +2,7 @@
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! r9 = num vertices left
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! r10 = PVR_CMD_VERTEX
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! r11 = PVR_CMD_VERTEX_EOL
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! r12 = ??????
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! r12 = ClipLine function
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! r13 = cur vertex
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! r14 = next vertex (prefetch)
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@ -80,39 +80,6 @@
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.endm
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! Handles a viewport update or PowerVR GPU command
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! CLOBBERS: r0, r2, r3
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! INPUTS: r4, r8 (SQ global)
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! OUTPUTS: r4,r8 altered, fr8-fr12
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_HandleCommand:
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mov.l @REG_V0,r2 ! r2 = v->flags
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extu.b r2,r0 ! r2 = v->flags & 0xFF
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cmp/eq #35,r0 ! T = r2 == 0x23
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bt.s 1f ! if (T) goto 1;
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nop
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PushVertex REG_V0
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rts
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nop
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1:
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add #4,r4
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mov.l .VP_0,r2
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! Load VIEWPORT registers
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fmov.s @r4+, fr8 ! VIEWPORT_HWIDTH = src->x
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fmov.s @r4+, fr9 ! VIEWPORT_HHEIGHT = src->y
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fmov.s @r4+,fr10 ! VIEWPORT_X_PLUS_HWIDTH = src->z
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add #16,r2
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fmov.s @r4+,fr11 ! VIEWPORT_Y_PLUS_HHEIGHT = src->u
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! And store to vp global
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fmov.s fr11,@-r2
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fmov.s fr10,@-r2
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fmov.s fr9,@-r2
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rts
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fmov.s fr8,@-r2
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.align 4
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.VP_0:
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.long _vp
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_Case_0_0_0_1:
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_Case_0_0_1_0:
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_Case_0_0_1_1:
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@ -173,19 +140,40 @@ _ProcessVertexList:
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! REGISTER SETUP
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mov r4,r14
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mov r4,r13
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!mov.l .CMD_MSK,r12
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mov.l .PVR_EOL,r11
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mov.l .PVR_VTX,r10
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mov.l .CLIPFUNC,r12
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mov.l .PVR_EOL, r11
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mov.l .PVR_VTX, r10
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mov r5,r9
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bra SUBMIT_LOOP
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mov r6,r8
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! Handles a non-vertex command
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DO_CMD:
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mov.l .L37,r1
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jsr @r1
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mov r13,r4
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mov r13,r4 ! r4 = CUR
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mov r1,r0 ! r0 = MASK
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cmp/eq #35,r0 ! T = MASK == 0x23
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bt.s 9f ! if (T) goto 9;
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nop
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! PowerVR GPU command
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PushVertex REG_V0
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bra NEXT_ITER
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nop
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! Viewport update command
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9:
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add #4,r4
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mov.l .VP_1,r2
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! Load VIEWPORT registers
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fmov.s @r4+, fr8 ! VIEWPORT_HWIDTH = src->x
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fmov.s @r4+, fr9 ! VIEWPORT_HHEIGHT = src->y
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fmov.s @r4+,fr10 ! VIEWPORT_X_PLUS_HWIDTH = src->z
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add #16,r2
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fmov.s @r4+,fr11 ! VIEWPORT_Y_PLUS_HHEIGHT = src->u
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! And store to vp global
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fmov.s fr11,@-r2
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fmov.s fr10,@-r2
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fmov.s fr9,@-r2
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bra NEXT_ITER
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fmov.s fr8,@-r2
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SUBMIT_LOOP:
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mov.l @r13,r0 ! FLAGS = CUR->flags
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@ -250,8 +238,8 @@ NEXT_ITER:
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.long 0xE0000000
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.PVR_EOL:
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.long 0xF0000000
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.L37:
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.long _HandleCommand
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.CLIPFUNC:
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.long _ClipLine
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! CASES table holds the functions to transfer a quad,
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! based on the visibility clipflags of the 4 vertices
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@ -262,12 +250,12 @@ NEXT_ITER:
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.long _Case_0_0_1_0
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.long _Case_0_0_1_1
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.long _Case_0_1_0_0
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.long _Case_0_1_0_1
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.long _arch_exit ! V0_VIS | V2_VIS, Should never happen
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.long _Case_0_1_1_0
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.long _Case_0_1_1_1
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.long _Case_1_0_0_0
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.long _Case_1_0_0_1
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.long _Case_1_0_1_0
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.long _arch_exit ! V1_VIS | V3_VIS, Should never happen
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.long _Case_1_0_1_1
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.long _Case_1_1_0_0
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.long _Case_1_1_0_1
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2
third_party/gldc/src/sh4.c
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2
third_party/gldc/src/sh4.c
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@ -8,7 +8,7 @@
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#define SQ_BASE_ADDRESS (void*) 0xe0000000
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#define PREFETCH(addr) __builtin_prefetch((addr))
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static Viewport vp;
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Viewport vp;
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GL_FORCE_INLINE float _glFastInvert(float x) {
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return MATH_fsrra(x * x);
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