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;====================================================================================
;Angel code examples
;The following ARM code is the Angel equivalent of the "Hello World" program on page 69 in the book.
;Note that, although the WriteC macro is defined, it is not used in the code as it is more efficient
;to retain the conditional SWI.
;====================================================================================
;====================================================================================
AREA HelloW,CODE,READONLY
SWI_ANGEL EQU 0x123456 ;SWI number for Angel semihosting
MACRO
$l Exit ;Angel SWI call to terminate execution
$l MOV r0, #0x18 ;Angel SWIreason_ReportException(0x18)
LDR r1, =0x20026 ;report ADP_Stopped_ApplicationExit
SWI SWI_ANGEL ;ARM semihosting SWI
MEND
; MACRO
;$l WriteC ;Angel SWI call to output char in [r1]
;$l MOV r0, #0x3 ;select Angel SYS_WRITEC function
; SWI SWI_ANGEL
; MEND
ENTRY ;code entry point
ADR r1, TEXT-1 ;r1->"Hello World"
MOV r0, #0x3 ;select Angel SYS_WRITEC r0
LOOP LDRB r2, [r1,#1]! ;get next byte r1
CMP r2, #0 ;check for text end
SWINE SWI_ANGEL ;if not end print... Print r1[7,0] byte
BNE LOOP ;..and loop back
Exit ;end of execution
ALIGN ;to ensure ADR works
;TEXT DATA
; = "Hello World",&a,&d,0
TEXT = "Hello World", &0a, &0d, 0
END ;end of program source
;============================================================
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