Diff: Program3_F20_Leong.s

Revision:

4:69f1e5fa2cb6

Parent:

2:1be4e7457636

--- a/Program3_F20_Leong.s	Mon Nov 16 06:35:09 2020 +0000
+++ b/Program3_F20_Leong.s	Mon Nov 16 15:02:45 2020 +0000
@@ -10,28 +10,18 @@
                     
                     GLOBAL swapRedBlue
                     ; uint32_t swapRedBlue ( uint32_t color)
-swapRedBlue         MOV R1, R0
-                    MOV R2, R0
-                    MOV R3, R0
-                    MOV R4, R0
-                    
-                    LSL R1, R1, #24
-                    LSR R1, R1, #8
-                    
-                    LSL R2, R2, #8
-                    LSR R2, R2, #24
+swapRedBlue         AND R1, R0, #0x00FF0000
+                    ASR R1, R1, #16
                     
-                    LSR R3, R3, #24
-                    LSL R3, R3, #24
+                    LDR R5, =0x000000FF
+                    AND R2, R0, R5
+                    LSL R2, R2, #16
                     
-                    LSL R4, R4, #16
-                    LSR R4, R4, #24
-                    LSL R4, R4, #8
+                    LDR R4, =0xFF00FF00
+                    AND R3, R0, R4
                     
-                    ORR R5, R1, R2
-                    ORR R6, R3, R4
-                    ORR R0, R5, R6
-                    BX LR
+                    ORR R0, R1, R2
+                    ORR R0, R0, R3
                     
                     GLOBAL toggleAlphaMSB
                     ; uint32_t toggleAlphaMSB ( uint32_t color)