Encoding:

Format:

CVT.S.PL fd, fs

Purpose:

Floating Point Convert Pair Lower to Single Floating Point

To convert one half of a paired single FP value to single FP.

Description:

 FPR[fd] = FPR[fs]31..0

The lower paired single value in FPR fs, in format PS, is converted to a value in single floating point format. The result is placed in FPR fd. This instruction can be used to isolate the lower half of a paired single value.

The operation is non-arithmetic; it causes no IEEE 754 exceptions, and the FCSR_Cause and FCSR_Flags fields are not modified.

Restrictions:

The fields fs and fd must specify valid FPRs-fs for type PS and fd for single floating point. If the fields are not valid, the result is UNPREDICTABLE.

The operand must be a value in format PS; if it is not, the result is UNPREDICTABLE and the value of the operand

FPR becomes UNPREDICTABLE.

The result of CVT.S.PL is UNPREDICTABLE if the processor is executing in the FR=0 32-bit FPU register model; it is predictable if executing on a 64-bit FPU in the FR=1 mode, but not with FR=0, and not on a 32-bit FPU.

Availability and Compatibility:

This instruction has been removed in Release 6.

Operation:

StoreFPR (fd, S, ConvertFmt(ValueFPR(fs, PS), PL, S))

Exceptions:

Coprocessor Unusable, Reserved Instruction

Floating Point Exceptions: