Stores a word of data from a general-purpose register into a specified location in memory.
| PowerPC | |
|---|---|
| stw | RS,D(RA) |
| POWER | |
|---|---|
| st | RS,D(RA) |
The stw and st instructions store a word from general-purpose register (GPR) RS into a word of storage addressed by the effective address (EA).
If GPR RA is not 0, the EA is the sum of the contents of GPR RA and D, a 16-bit signed two's complement integer sign-extended to 32 bits. If GPR RA is 0, then the EA is D.
The stw and st instructions have one syntax form and do not affect the Fixed-Point Exception Register or Condition Register Field 0.
The following code stores the contents of GPR 6 into a location in memory:
.csect data[rw] buffer: .long 0,0 # Assume GPR 6 contains 0x9000 3000. # Assume GPR 5 contains the address of buffer. .csect text[pr] stw 6,4(5) # 0x9000 3000 is now stored at the address buffer+4.
Fixed-Point Load and Store Instructions.