From e92c67d5a043e5044864ae9325d2adb97a5151e8 Mon Sep 17 00:00:00 2001
From: Robin Watts
Date: Thu, 6 Dec 2007 00:50:22 +0000
Subject: Attempted fix for the DS blitters; looks like I was reading from dst
 and storing to src. D'Oh. Still untested, but this code is broken anyway
 (apparently) and is disabled, so I can't really make it any worse...

svn-id: r29732
---
 backends/platform/ds/arm9/source/blitters_arm.s | 76 ++++++++++++-------------
 1 file changed, 38 insertions(+), 38 deletions(-)

(limited to 'backends/platform/ds/arm9/source')

diff --git a/backends/platform/ds/arm9/source/blitters_arm.s b/backends/platform/ds/arm9/source/blitters_arm.s
index fdf409a570..f473f4ccac 100644
--- a/backends/platform/ds/arm9/source/blitters_arm.s
+++ b/backends/platform/ds/arm9/source/blitters_arm.s
@@ -21,7 +21,7 @@
 @ @author Robin Watts (robin@wss.co.uk)
 
 	.text
-	
+
 	.global	asmDrawStripToScreen
 	.global	asmCopy8Col
 	.global	Rescale_320x256xPAL8_To_256x256x1555
@@ -142,7 +142,7 @@ asmCopy8Col:
 	@ r3 = height
 	STMFD	r13!,{r14}
 	SUB	r1,r1,#4
-	
+
 	TST	r3,#1
 	ADDNE   r3,r3,#1
 	BNE	roll2
@@ -177,9 +177,9 @@ Rescale_320x256x1555_To_256x256x1555:
 	@ r2 = dstStride
 	@ r3 = srcStride
 	STMFD	r13!,{r4-r5,r8-r11,r14}
-	
-	SUB	r2,r2,#64*5		@ srcStride -= line length
-	SUB	r3,r3,#64*4		@ dstStride -= line length
+
+	SUB	r2,r2,#64*4		@ srcStride -= line length
+	SUB	r3,r3,#64*5		@ dstStride -= line length
 
 	MOV	r8,    #0x0000001F
 	ORR	r8, r8,#0x00007C00
@@ -187,12 +187,12 @@ Rescale_320x256x1555_To_256x256x1555:
 	MOV	r5, #200		@ r5 = y
 yLoop3:
 	MOV	r4, #64			@ r4 = x
-xLoop3:	
-	LDRH	r9, [r0],#2		@ r9 = src0
-	LDRH	r10,[r0],#2		@ r10= src1
-	LDRH	r11,[r0],#2		@ r11= src2
-	LDRH	r12,[r0],#2		@ r12= src3
-	LDRH	r14,[r0],#2		@ r14= src4
+xLoop3:
+	LDRH	r9, [r1],#2		@ r9 = src0
+	LDRH	r10,[r1],#2		@ r10= src1
+	LDRH	r11,[r1],#2		@ r11= src2
+	LDRH	r12,[r1],#2		@ r12= src3
+	LDRH	r14,[r1],#2		@ r14= src4
 
 	ORR	r9, r9, r9, LSL #16	@ r9 = src0 | src0
 	ORR	r10,r10,r10,LSL #16	@ r10= src1 | src1
@@ -212,7 +212,7 @@ xLoop3:
 	ADD	r11,r11,r12		@ r11= dst2
 	ADD	r12,r12,r14		@ r12= src3 + src4
 	ADD	r12,r12,r14,LSL #1	@ r12= src3 + src4*3 = dst3<<2
-	
+
 	AND	r9, r8, r9, LSR #2	@ r9 = dst0 (split)
 	AND	r10,r8, r10,LSR #1	@ r10= dst1 (split)
 	AND	r11,r8, r11,LSR #1	@ r11= dst2 (split)
@@ -227,15 +227,15 @@ xLoop3:
 	ORR	r10,r10,#0x8000
 	ORR	r11,r11,#0x8000
 	ORR	r12,r12,#0x8000
-	
-	STRH	r9, [r1],#2
-	STRH	r10,[r1],#2
-	STRH	r11,[r1],#2
-	STRH	r12,[r1],#2
+
+	STRH	r9, [r0],#2
+	STRH	r10,[r0],#2
+	STRH	r11,[r0],#2
+	STRH	r12,[r0],#2
 
 	SUBS	r4,r4,#1
 	BGT	xLoop3
-	
+
 	ADD	r0,r0,r2,LSL #1
 	ADD	r1,r2,r3,LSL #1
 	SUBS	r5,r5,#1
@@ -264,7 +264,7 @@ Rescale_320x256xPAL8_To_256x256x1555:
 	ORR	r8, r8,#0x00007C00
 	ORR	r8, r8,#0x03E00000	@ r8 = mask
 	LDR	r9, [r13,#7*4]		@ r9 = palette
-	
+
 	SUB	r13,r13,#256*4		@ r13 = 1K of space on the stack.
 	MOV	r5, r13			@ r5 points to this space
 	MOV	r14,#256
@@ -275,19 +275,19 @@ palLoop:
 	AND	r10,r10,r8		@ r10 = separated palette entry
 	STR	r10,[r5], #4
 	BGT	palLoop
-	
-	SUB	r2,r2,#64*5		@ srcStride -= line length
-	SUB	r3,r3,#64*4		@ dstStride -= line length
+
+	SUB	r2,r2,#64*4		@ srcStride -= line length
+	SUB	r3,r3,#64*5		@ dstStride -= line length
 
 	MOV	r5,#200			@ r5 = y
 yLoop4:
 	MOV	r4,#64			@ r4 = x
-xLoop4:	
-	LDRB	r9, [r0],#1		@ r9 = src0
-	LDRB	r10,[r0],#1		@ r10= src1
-	LDRB	r11,[r0],#1		@ r11= src2
-	LDRB	r12,[r0],#1		@ r12= src3
-	LDRB	r14,[r0],#1		@ r14= src4
+xLoop4:
+	LDRB	r9, [r1],#1		@ r9 = src0
+	LDRB	r10,[r1],#1		@ r10= src1
+	LDRB	r11,[r1],#1		@ r11= src2
+	LDRB	r12,[r1],#1		@ r12= src3
+	LDRB	r14,[r1],#1		@ r14= src4
 
 	LDR	r9, [r13,r9, LSL #2]	@ r9 = pal[src0]
 	LDR	r10,[r13,r10,LSL #2]	@ r10= pal[src1]
@@ -301,7 +301,7 @@ xLoop4:
 	ADD	r11,r11,r12		@ r11= dst2
 	ADD	r12,r12,r14		@ r12= src3 + src4
 	ADD	r12,r12,r14,LSL #1	@ r12= src3 + src4*3 = dst3<<2
-	
+
 	AND	r9, r8, r9, LSR #2	@ r9 = dst0 (split)
 	AND	r10,r8, r10,LSR #1	@ r10= dst1 (split)
 	AND	r11,r8, r11,LSR #1	@ r11= dst2 (split)
@@ -316,17 +316,17 @@ xLoop4:
 	ORR	r10,r10,#0x8000
 	ORR	r11,r11,#0x8000
 	ORR	r12,r12,#0x8000
-	
-	STRH	r9, [r1],#2
-	STRH	r10,[r1],#2
-	STRH	r11,[r1],#2
-	STRH	r12,[r1],#2
+
+	STRH	r9, [r0],#2
+	STRH	r10,[r0],#2
+	STRH	r11,[r0],#2
+	STRH	r12,[r0],#2
 
 	SUBS	r4,r4,#1
 	BGT	xLoop4
-	
-	ADD	r0,r0,r2
-	ADD	r1,r2,r3,LSL #1
+
+	ADD	r0,r0,r2,LSL #1
+	ADD	r1,r2,r3
 	SUBS	r5,r5,#1
 	BGT	yLoop4
 
@@ -334,4 +334,4 @@ xLoop4:
 
 	LDMFD	r13!,{r4-r5,r8-r11,PC}
 
- 	  	 
+
-- 
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