RDFSTATUS

Operation

Read the FPU status/control register into an Rn register.

Assembler Syntax

RDFSTATUS Rn(d)

Privilege

Unprivileged

Required CPUID flags

FP

RDFSTATUS reads the architectural 16-bit FSTATUS register, zero-extends it to 64 bits, and writes the result to the destination Rn register. FSTATUS contains floating-point exception-condition enables, rounding mode, and NaN and subnormal handling bits. FFLAGS holds accrued floating-point exception flags. RDFSTATUS requires the floating-point extension.

2.75in

Encodings

RDFSTATUS Rn(d)

Format: Instruction format for RDFSTATUS Rn(d)