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FRINTX (scalar)

Floating-point Round to Integral exact, using current rounding mode (scalar).

Syntax

FRINTX Hd, Hn ; Half-precision

FRINTX Sd, Sn ; Single-precision

FRINTX Dd, Dn ; Double-precision

Where:

Hd
Is the 16-bit name of the SIMD and FP destination register.
Hn
Is the 16-bit name of the SIMD and FP source register.
Sd
Is the 32-bit name of the SIMD and FP destination register.
Sn
Is the 32-bit name of the SIMD and FP source register.
Dd
Is the 64-bit name of the SIMD and FP destination register.
Dn
Is the 64-bit name of the SIMD and FP source register.

Usage

Floating-point Round to Integral exact, using current rounding mode (scalar). This instruction rounds a floating-point value in the SIMD and FP source register to an integral floating-point value of the same size using the rounding mode that is determined by the FPCR, and writes the result to the SIMD and FP destination register.

An Inexact exception is raised when the result value is not numerically equal to the input value. A zero input gives a zero result with the same sign, an infinite input gives an infinite result with the same sign, and a NaN is propagated as for normal arithmetic.

A floating-point exception can be generated by this instruction. Depending on the settings in FPCR in the ARMv8-A Architecture Reference Manual, the exception results in either a flag being set in FPSR in the ARMv8-A Architecture Reference Manual, or a synchronous exception being generated. For more information, see Floating-point exception traps in the ARMv8-A Architecture Reference Manual.

Depending on the settings in the CPACR_EL1, CPTR_EL2, and CPTR_EL3 registers, and the current Security state and Exception level, an attempt to execute the instruction might be trapped.

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