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https://github.com/RaySollium99/picodrive.git
synced 2025-09-05 07:17:45 -04:00
sms, basic gamegear support
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kub
parent
0df7401c02
commit
466fa07953
16 changed files with 451 additions and 214 deletions
193
pico/draw_arm.S
193
pico/draw_arm.S
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@ -1642,27 +1642,42 @@ FinalizeLine555:
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add r3, r10, #OFS_EST_HighPal
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mov lr, #0xff
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ldr r1, [r10, #OFS_EST_HighCol]
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ldr r0, [r10, #OFS_EST_DrawLineDest]
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add r1, r1, #8
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ldrb r12, [r8, #OFS_Pico_video_reg+12]
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mov lr, lr, lsl #1
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tst r12, #1
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movne r2, #320/8 @ len
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bne .fl_no32colRGB555
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ldr r5, [r10, #OFS_EST_PicoOpt]
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mov r2, #256/8
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ldr r1, [r10, #OFS_EST_HighCol]
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ldr r0, [r10, #OFS_EST_DrawLineDest]
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ldr r4, [r5]
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tst r4, #0x4000
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bne .fl_32scale_RGB555
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tst r4, #0x0100
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addeq r0, r0, #32*2
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ldr r7, [r5, #OFS_PicoIn_AHW-OFS_PicoIn_opt]
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ldrb r12,[r8, #OFS_Pico_video_reg+12]
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ldr r2, [r8, #OFS_Pico_m_hardware]
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add r1, r1, #8
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tst r7, #0x10
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beq .fl_no20colRGB555
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and r7, r2, #0x3
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cmp r7, #0x3 @ Game Gear, LCD?
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bne .fl_no20colRGB555
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mov r2, #160/8 @ len = 160
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tst r4, #0x4000 @ EN_SOFTSCALE?
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bne .fl_20scale_RGB555 @ scale 160->320
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beq .fl_checkborder
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.fl_no20colRGB555:
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tst r12, #1 @ h32?
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movne r2, #320/8 @ len = 320
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bne .fl_no32colRGB555
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moveq r2, #256/8 @ len = 256
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tst r4, #0x4000 @ EN_SOFTSCALE?
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bne .fl_32scale_RGB555 @ scale 256->320
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.fl_checkborder:
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tst r4, #0x0100 @ DIS_32C_BORDER?
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rsbeq r4, r2, #320/8 @ pd += (320-len)/2
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addeq r0, r0, r4, lsl #3
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.fl_no32colRGB555:
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#ifdef UNALIGNED_DRAWLINEDEST
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@ this is basically for Gizmondo, which has unaligned odd lines in the framebuffer
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tst r0, #2
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@ -1715,9 +1730,9 @@ FinalizeLine555:
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bne .fl_32scale_RGB555u
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#endif
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ands r5, r5, #0x3
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addne pc, pc, r5, lsl #2
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b .fl_32scale_nn
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and r5, r5, #0x3
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add pc, pc, r5, lsl #2
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nop
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b .fl_32scale_nn
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b .fl_32scale_snn
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b .fl_32scale_bl2
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@ -1866,6 +1881,9 @@ FinalizeLine555:
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ldmfd sp!, {r4-r10,pc}
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.fl_32scale_bl4:
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// TODO this should reflect the bl4 C algorithm, but it doesn't, it's bln.
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and r9, r9, r9, lsl #1 @ nuke 2 LSBs to avoid spilling for n/4
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.fl_32loop_bl4:
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ldr r12, [r1], #4
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ldr r7, [r1], #4
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@ -1926,10 +1944,147 @@ FinalizeLine555:
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subs r2, r2, #1
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stmia r0!, {r4,r5,r6,r8,r10}
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bne .fl_32scale_bl4
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bne .fl_32loop_bl4
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ldmfd sp!, {r4-r10,pc}
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.fl_20scale_RGB555:
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ldr r5, [r5, #OFS_PicoIn_filter-OFS_PicoIn_opt]
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mov r9, #0xf700 @ f800 07e0 001f | e000 0780 001c | 3800 01e0 0007
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orr r9, r9, #0x00de
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#ifdef UNALIGNED_DRAWLINEDEST
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tst r0, #2
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bne .fl_20scale_RGB555u
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#endif
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and r5, r5, #0x2
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add pc, pc, r5, lsl #1
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nop
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b .fl_20scale_nn
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b .fl_20scale_bl2
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.fl_20scale_nn:
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ldr r12, [r1], #4
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ldr r7, [r1], #4
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and r4, lr, r12, lsl #1
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ldrh r4, [r3, r4]
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and r5, lr, r12, lsr #7
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ldrh r5, [r3, r5]
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and r6, lr, r12, lsr #15
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ldrh r6, [r3, r6]
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and r8 ,lr, r12, lsr #23
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ldrh r8 ,[r3, r8 ]
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orr r4, r4, r4, lsl #16
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orr r5, r5, r5, lsl #16
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orr r6, r6, r6, lsl #16
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orr r8, r8, r8, lsl #16
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stmia r0!, {r4,r5,r6,r8}
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and r4, lr, r7, lsl #1
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ldrh r4, [r3, r4]
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and r5, lr, r7, lsr #7
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ldrh r5, [r3, r5]
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and r6 ,lr, r7, lsr #15
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ldrh r6 ,[r3, r6]
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and r8, lr, r7, lsr #23
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ldrh r8, [r3, r8]
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orr r4, r4, r4, lsl #16
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orr r5, r5, r5, lsl #16
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orr r6, r6, r6, lsl #16
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orr r8, r8, r8, lsl #16
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stmia r0!, {r4,r5,r6,r8}
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subs r2, r2, #1
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bne .fl_20scale_nn
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ldmfd sp!, {r4-r10,pc}
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.fl_20scale_bl2:
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ldr r8, [r1]
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and r8, lr, r8, lsl #1
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ldrh r8, [r3, r8]
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and r8, r8, r9
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lsl r8, r8, #16
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.fl_20loop_bl2:
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ldr r12, [r1], #4
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ldr r7, [r1], #4
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and r4, lr, r12, lsl #1
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ldrh r4, [r3, r4]
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and r5, lr, r12, lsr #7
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ldrh r5, [r3, r5]
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and r6, lr, r12, lsr #15
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ldrh r6, [r3, r6]
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and r4, r4, r9
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add r10,r4, r8, lsr #16
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mov r10,r10,lsr #1
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orr r4, r10,r4, lsl #16 @ (px-1+px0)/2 | px0
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and r8 ,lr, r12, lsr #23
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ldrh r8 ,[r3, r8]
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and r5, r5, r9
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add r10,r5, r4, lsr #16
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mov r10,r10,lsr #1
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orr r5, r10,r5, lsl #16 @ (px0 +px1)/2 | px1
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and r6, r6, r9
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add r10,r6, r5, lsr #16
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mov r10,r10,lsr #1
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orr r6, r10,r6, lsl #16 @ (px1 +px2)/2 | px2
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and r8, r8, r9
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add r10,r8, r6, lsr #16
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mov r10,r10,lsr #1
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orr r8, r10,r8, lsl #16 @ (px2 +px3)/2 | px3
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stmia r0!, {r4,r5,r6,r8}
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and r4, lr, r7, lsl #1
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ldrh r4, [r3, r4]
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and r5, lr, r7, lsr #7
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ldrh r5, [r3, r5]
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and r6, lr, r7, lsr #15
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ldrh r6, [r3, r6]
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and r4, r4, r9
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add r10,r4, r8, lsr #16
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mov r10,r10,lsr #1
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orr r4, r10,r4, lsl #16 @ (px-1+px0)/2 | px0
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and r8 ,lr, r7, lsr #23
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ldrh r8 ,[r3, r8]
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and r5, r5, r9
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add r10,r5, r4, lsr #16
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mov r10,r10,lsr #1
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orr r5, r10,r5, lsl #16 @ (px0 +px1)/2 | px1
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and r6, r6, r9
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add r10,r6, r5, lsr #16
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mov r10,r10,lsr #1
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orr r6, r10,r6, lsl #16 @ (px1 +px2)/2 | px2
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and r8, r8, r9
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add r10,r8, r6, lsr #16
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mov r10,r10,lsr #1
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orr r8, r10,r8, lsl #16 @ (px2 +px3)/2 | px3
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subs r2, r2, #1
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stmia r0!, {r4,r5,r6,r8}
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bne .fl_20loop_bl2
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ldmfd sp!, {r4-r10,pc}
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#ifdef UNALIGNED_DRAWLINEDEST
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@ unaligned versions of loops
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@ warning: starts drawing 2bytes before dst
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