Encoding:

Format:

CVT.S.fmt 

CVT.S.D fd, fs

CVT.S.W fd, fs

CVT.S.L fd, fs

Purpose:

Floating Point Convert to Single Floating Point

To convert an FP or fixed point value to single FP.

Description:

 FPR[fd] = convert_and_round(FPR[fs])

The value in FPR fs, in format fmt, is converted to a value in single floating point format and rounded according to the current rounding mode in FCSR. The result is placed in FPR fd.

Restrictions:

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

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

FPR becomes UNPREDICTABLE.

For CVT.S.L, the result of this instruction 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.

Operation:

StoreFPR(fd, S, ConvertFmt(ValueFPR(fs, fmt), fmt, S))

Exceptions:

Coprocessor Unusable, Reserved Instruction

Floating Point Exceptions:

Invalid Operation, Unimplemented Operation, Inexact, Overflow, Underflow