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FPREM1
Computes the remainder of a division operation. It divides the value in the ST(0) register by the value in a specified register or memory location, and stores the remainder in ST(0).
The table after the description covers what the source and destinations can be.
| source | destination(s) |
|---|---|
| reg | ST(0) |
| m64 | ST(0) |
DO NOT support LOCK
This instruction is available in 64-bit mode and compatibility mode. It operates exclusively on the x87 FPU register stack.
The instruction MUST be used in conjunction with FPREM to complete a full division if the quotient exceeds the capacity of the 64-bit integer representation. FPREM1 computes only the first partial remainder. If the quotient is larger than $2^{63}$, the result in ST(0) will be incorrect unless FPREM is called repeatedly.
The instruction MAY trigger the following exceptions:
- #Z: If the divisor is zero.
- #O: If the result cannot be represented.
- #D: If an operand is denormal.
- #P: If the result is inexact.