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ARM INSTRUCTION SET S3C2410A
3-8
ASSEMBLER SYNTAX
Items in {} are optional. Items in <> must be present.
B{L}{cond} <expression>
{L} Used to request the Branch with Link form of the instruction. If absent, R14 will not be
affected by the instruction.
{cond} A two-character mnemonic as shown in Table 3-2. If absent then AL (ALways) will be
used.
<expression> The destination. The assembler calculates the offset.
Examples
here BAL here ; Assembles to 0xEAFFFFFE (note effect of PC offset).
B there ; Always condition used as default.
CMP R1,#0 ; Compare R1 with zero and branch to fred
; if R1 was zero, otherwise continue.
BEQ fred ; Continue to next instruction.
BL sub+ROM ; Call subroutine at computed address.
ADDS R1,#1 ; Add 1 to register 1, setting CPSR flags
; on the result then call subroutine if
BLCC sub ; the C flag is clear, which will be the
; case unless R1 held 0xFFFFFFFF.