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NDS: Integrated Robin's LDRB * 2 -> LDRH + fixes(endianness & stack space) 14ms -> 13ms

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svn-id: r29809
This commit is contained in:
Bertrand Augereau
2007-12-10 01:25:18 +00:00
parent e946eff205
commit 209ebf3383
1 changed files with 14 additions and 13 deletions
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backends/platform/ds/arm9/source/blitters_arm.s
+14 -13
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@@ -257,11 +257,11 @@ Rescale_320x256xPAL8_To_256x256x1555:
@ r1 = src
@ r2 = dstStride
@ r3 = srcStride
STMFD r13!,{r4-r5,r8-r11,r14}
STMFD r13!,{r4-r6,r8-r11,r14}
MOV r8, #0x0000001F
ORR r8, r8,#0x0000FC00
ORR r8, r8,#0x03E00000 @ r8 = mask
LDR r9, [r13,#7*4] @ r9 = palette
LDR r9, [r13,#8*4] @ r9 = palette
SUB r13,r13,#256*4 @ r13 = 1K of space on the stack.
MOV r5, r13 @ r5 points to this space
@@ -283,12 +283,13 @@ yLoop4:
MOV r4,#32 @ r4 = x
xLoop4:
LDRH r9, [r1],#2
MOV r10, r9, LSR #8
AND r9, r9, #0xFF
LDRH r11,[r1],#2
MOV r12, r11, LSR #8
AND r11, r11, #0xFF
LDRB r14,[r1],#1
LDRH r6,[r1],#2
MOV r10,r9, LSR #8
AND r9, r9, #0xFF
MOV r12,r11,LSR #8
AND r11,r11,#0xFF
AND r14,r6,#0xFF
LDR r9, [r13,r9, LSL #2] @ r9 = pal[src0]
LDR r10,[r13,r10,LSL #2] @ r10= pal[src1]
@@ -319,13 +320,13 @@ xLoop4:
ORR r11,r12,r11,LSR #16
STMIA r0!,{r9,r11}
LDRB r9, [r1],#1
LDRH r10,[r1],#2
MOV r11, r10, LSR #8
AND r10, r10, #0xFF
LDRH r12,[r1],#2
MOV r14, r12, LSR #8
AND r12, r12, #0xFF
MOV r9,r6,LSR #8
MOV r11,r10,LSR #8
AND r10,r10,#0xFF
MOV r14,r12,LSR #8
AND r12,r12,#0xFF
LDR r9, [r13,r9, LSL #2] @ r9 = pal[src0]
LDR r10,[r13,r10,LSL #2] @ r10= pal[src1]
@@ -366,6 +367,6 @@ xLoop4:
ADD r13,r13,#256*4
LDMFD r13!,{r4-r5,r8-r11,PC}
LDMFD r13!,{r4-r6,r8-r11,PC}