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CM71-00105-1E FUJITSU MICROELECTRONICS LIMITED 263
FR81 Family
CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
7.87
7.87 FST (Single Precision Floating Point Data Store)
R15 is subtracted by 4, and the value in FRi is loaded to the memory address identified
by new R15.
● Assembler Format
FST FRi, @-R15
● Operation
R15 - 4 → R15
FRi → (R15)
● Classification
Single-precision floating point instruction, FR81 family
● Execution Cycles
a cycle
● Instruction Format
● EIT Occurrence and Detection
A data access protection violation exception, an invalid instruction exception (a data access error or FPU
absence error), or an interrupt is detected.
MSB LSB
(n+0)00010111110110 -
(n+2) - FRi