FUJITSU FR family 32-bit microcontroller instruction manuel CM71-00101-5E - Manual (Page 278)

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CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
7.133 ENTER (Enter Function)
This instruction is used for stack frame generation processing for high level languages.
The value "u8" is calculated as an unsigned value.
■
ENTER (Enter Function)
Assembler format: ENTER #u10
Operation: R14
→
(R15 – 4)
R15 – 4
→
R14
R15 – extu (u8 × 4) → R15
Flag change:
N, Z, V, and C: Unchanged
Execution cycles: 1 + a cycles
Instruction format:
N Z V C
– – – –
MSB LSB
0 0 0 0 1 1 1 1 u8