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#407 32X rasterize_asm

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XProger
2022-03-08 19:33:53 +03:00
parent c49a46de6b
commit 9cf4294324
1 changed files with 54 additions and 0 deletions
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src/platform/32x/asm/rasterize.s Normal file
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#include "common.i"
#define type r0
#define proc r1
#define flags r4 // arg
#define L r5 // arg
#define R r6
#define pixel flags
#define y type
.text
.align 4
.global _rasterize_asm
_rasterize_asm:
mov flags, type
shll2 type
swap.w type, type
and #15, type
cmp/eq #FACE_TYPE_F, type
bf/s 0f
mov L, R
extu.b flags, R
0: // proc = table[type]
mov type, proc
mova var_table, type
shll2 proc
mov.l @(type, proc), proc
// pixel = fb + y * 320
mov.w @(VERTEX_Y, L), y
mov.l var_fb, pixel
shll8 y
add y, pixel // pixel += y * 256
shlr2 y
jmp @proc
add y, pixel // pixel += y * 64
nop
var_fb:
.long 0x24000200
var_table:
.long _rasterizeS_c
.long _rasterizeF_c
.long _rasterizeFT_c
.long _rasterizeFTA_c
.long _rasterizeGT_c
.long _rasterizeGTA_c
.long _rasterizeSprite_c
.long _rasterizeFillS_c
.long _rasterizeLineH_c
.long _rasterizeLineV_c