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#368 GBA matrixRotateYXZ fetch sincos address lut once

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This commit is contained in:
XProger 2022-12-04 03:15:53 +03:00
parent 4bb76c204f
commit 3ba5ec3818
3 changed files with 30 additions and 18 deletions
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13
src/platform/gba/asm/faceAddMeshQuads.s
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@ -49,9 +49,10 @@ faceAddMeshQuads_asm:
.loop:
ldrh vp0, [polys], #2
ldrh vp2, [polys], #4 // + flags
lsr vp1, vp0, #8
and vp0, #0xFF
ldrh vp2, [polys], #4 // + flags
lsr vp3, vp2, #8
and vp2, #0xFF
@ -85,11 +86,11 @@ faceAddMeshQuads_asm:
orrne flags, #FACE_CLIPPED
// depth = AVG_Z4
lsl vg0, #16
add depth, vg0, vg1, lsl #16
add depth, vg2, lsl #16
add depth, vg3, lsl #16
lsr depth, #(16 + 2)
lsl vg0, #16 // clip g part (high half)
add depth, vg0, vg1, lsl #16 // depth = vz0 + vz1
add depth, vg2, lsl #16 // depth += vz2
add depth, vg3, lsl #16 // depth += vz3
lsr depth, #(16 + 2) // dpeth /= 4
// faceAdd
rsb vp0, vertices, vp0, lsr #3

11
src/platform/gba/asm/faceAddMeshTriangles.s
View File

@ -47,9 +47,10 @@ faceAddMeshTriangles_asm:
.loop:
ldrh vp0, [polys], #2
ldrh vp2, [polys], #4 // + flags
lsr vp1, vp0, #8
and vp0, #0xFF
ldrh vp2, [polys], #4 // + flags
and vp2, #0xFF
add vp0, vp, vp0, lsl #3
@ -77,10 +78,10 @@ faceAddMeshTriangles_asm:
orrne flags, #FACE_CLIPPED
// depth = AVG_Z3
lsl vg0, #16
add depth, vg0, vg1, lsl #16
add depth, vg2, lsl #17
lsr depth, #(16 + 2)
lsl vg0, #16 // clip g part (high half)
add depth, vg0, vg1, lsl #16 // depth = vz0 + vz1
add depth, vg2, lsl #17 // depth += vz2 * 2
lsr depth, #(16 + 2) // depth /= 4
// faceAdd
rsb vp0, vertices, vp0, lsr #3

24
src/platform/gba/asm/matrixRotate.s
View File

@ -8,6 +8,13 @@
mov \sin, \sin, asr #16
.endm
.macro sincosLUT lut, angle, sin, cos
ldr \sin, [\lut, \angle, lsl #2]
mov \cos, \sin, lsl #16
mov \cos, \cos, asr #16
mov \sin, \sin, asr #16
.endm
.macro rotxy x, y, sin, cos, t
mul \t, \y, \cos
mla \t, \x, \sin, \t
@ -126,6 +133,7 @@ e00 .req r3
e01 .req r4
e02 .req r5
e10 .req r6
scLUT .req r7
// FIQ regs
e11 .req r8
e12 .req r9
@ -151,14 +159,16 @@ matrixRotateYXZ_asm:
and angleY, mask, angleY, lsr #4
and angleZ, mask, angleZ, lsr #4
matrixRotateYXZ_fast_asm:
matrixRotateYXZ_fast_asm: // routine for pre-shifted angles
orr mask, angleX, angleY
orrs mask, mask, angleZ
bxeq lr
stmfd sp!, {r4-r6}
stmfd sp!, {r4-r7}
fiq_on
ldr scLUT, =gSinCosTable
ldr mm, =gMatrixPtr
ldr mm, [mm]
ldmia mm, {e00, e01, e02}
@ -171,7 +181,7 @@ matrixRotateYXZ_fast_asm:
cmp angleY, #0
beq .rotX
sincos angleY, sinY, cosY
sincosLUT scLUT, angleY, sinY, cosY
rotxy e00, e02, sinY, cosY, tmp
rotxy e10, e12, sinY, cosY, tmp
@ -181,7 +191,7 @@ matrixRotateYXZ_fast_asm:
cmp angleX, #0
beq .rotZ
sincos angleX, sinX, cosX
sincosLUT scLUT, angleX, sinX, cosX
rotxy e02, e01, sinX, cosX, tmp
rotxy e12, e11, sinX, cosX, tmp
@ -191,13 +201,13 @@ matrixRotateYXZ_fast_asm:
cmp angleZ, #0
beq .done
sincos angleZ, sinZ, cosZ
sincosLUT scLUT, angleZ, sinZ, cosZ
rotxy e01, e00, sinZ, cosZ, tmp
rotxy e11, e10, sinZ, cosZ, tmp
rotxy e21, e20, sinZ, cosZ, tmp
.done:
.done:
ldr mm, =gMatrixPtr
ldr mm, [mm]
@ -208,7 +218,7 @@ matrixRotateYXZ_fast_asm:
stmia mm, {e20, e21, e22}
fiq_off
ldmfd sp!, {r4-r6}
ldmfd sp!, {r4-r7}
bx lr
q .req r0 // arg