Stores in memory two double-precision values at two consecutive doubleword locations.
Note: The stfq instruction is supported only in the POWER2 implementation of the POWER architecture.
| POWER2 | |
|---|---|
| stfq | FRS,DS(RA) |
The stfq instruction stores in memory the contents of two consecutive floating-point registers (FPR) at the location specified by the effective address (EA).
DS is sign-extended to 30 bits and concatenated on the right with b'00' to form the offset value. If general-purpose register (GPR) RA is 0, the offset value is the EA. If GPR RA is not 0, the offset value is added to GPR RA to generate the EA. The contents of FPR FRS is stored into the doubleword of storage at the EA. If FPR FRS is 31, then the contents of FPR 0 is stored into the doubleword at EA+8; otherwise, the contents of FRS+1 are stored into the doubleword at EA+8.
The stfq instruction has one syntax form and does not affect the Floating-Point Status and Control Register or Condition Register Field 0.
The lfqux (Load Floating-Point Quad with Update Indexed) instruction.
Floating-Point Load and Store Instructions.