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more ARM asm sprite rendering bugfixes

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This commit is contained in:
kub 2020-02-29 23:47:14 +01:00
parent d9e12ee757
commit 93f41f8e16
1 changed files with 8 additions and 6 deletions
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14
pico/draw_arm.S
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@ -317,9 +317,10 @@ DrawLayer:
moveq r1, #0x0007
movgt r1, #0x00ff @ r1=ymask=(height<<8)|0xff; ...; // Y Mask in pixels
add r10, r10, #5
cmp r10, #7
subge r10, r10, #1 @ r10=shift[width] (5,6,6,7)
cmp r10, #2
addlt r10, r10, #5
moveq r10, #5
movgt r10, #7 @ r10=shift[width] (5,6,5,7)
ldr r2, [r12, #OFS_EST_DrawScanline]
ldr lr, [r12, #OFS_EST_PicoMem_vram]
@ -366,7 +367,8 @@ DrawLayer:
bne .DrawStrip_interlace
tst r0, r0
movne r7, r7, lsr #16
moveq r7, r7, lsl #16
mov r7, r7, lsr #16
@ Find the line in the name table
add r2, r2, r7
@ -699,8 +701,8 @@ DrawLayer:
@ interlace mode 2? Sonic 2?
.DrawStrip_interlace:
tst r0, r0
moveq r7, r7, lsl #21
movne r7, r7, lsl #5
movne r7, r7, lsr #16
mov r7, r7, lsl #21
@ Find the line in the name table
add r2, r7, r2, lsl #22 @ r2=(vscroll+(DrawScanline<<1))<<21 (11 bits);