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ARM Compiler armasm User Guide : FCMP

FCMP

Floating-point quiet compare.

Syntax

FCMP Sn, Sm ; Single-precision

FCMP Sn, #0.0 ; Single-precision, zero

FCMP Dn, Dm ; Double-precision

FCMP Dn, #0.0 ; Double-precision, zero

Where:

Sn

Depends on the instruction variant:

Single-precision

Is the 32-bit name of the first SIMD and FP source register.

Single-precision, zero

Is the 32-bit name of the SIMD and FP source register.

Sm

Is the 32-bit name of the second SIMD and FP source register.

Dn

Depends on the instruction variant:

Double-precision

Is the 64-bit name of the first SIMD and FP source register.

Double-precision, zero

Is the 64-bit name of the SIMD and FP source register.

Dm

Is the 64-bit name of the second SIMD and FP source register.

Operation

Either:

  • flags = compareQuiet(Vn, Vm), with register.
  • flags = compareQuiet(Vn, 0.0), with zero.

Where V is either W or X.

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