Flow-control structures: Difference between revisions
→{{header|Z80 Assembly}}: added conditional jumps
Puppydrum64 (talk | contribs) m (→{{header|Z80 Assembly}}: added JR and interrupts.) |
Puppydrum64 (talk | contribs) (→{{header|Z80 Assembly}}: added conditional jumps) |
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=={{header|Z80 Assembly}}==
<lang z80>JP &XXXX ; jump to an absolute address
JP z,&XXXX ; conditionally jump to an absolute address. If the condition is not met, no jump shall occur and execution continues to the
JR &XX ; jump XX bytes forward or backward (this is a signed offset)▼
; next instruction.
JR z,&XX ; conditionally jump forward or backward (JR cannot use parity, overflow, or sign flags to jump. JP, CALL, and RET can.▼
JP (HL) ; copy the value in HL to the program counter
▲JR &XX ; jump XX bytes forward or backward (this is a signed offset)
▲JR z,&XX ; conditionally jump forward or backward (JR cannot use parity, overflow, or sign flags to jump. JP, CALL, and RET can.)
PUSH rr RET ; fake a return address and "return" to that address
CALL label ; call a subroutine named "label"
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