#407 32X rasterize_asm

src/platform/32x/asm/rasterize.s

@@ -0,0 +1,54 @@
+#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