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## VRINTX (floating-point)

Round floating-point to integer inexact rounds a floating-point value to an integral floating-point value of the same size, using the rounding mode specified in the FPSCR, and raises an Inexact exception 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.

It has encodings from the following instruction sets: A32 ( A1 ) and T32 ( T1 ) .

### A1

 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 != 1111 1 1 1 0 1 D 1 1 0 1 1 1 Vd 1 0 size 0 1 M 0 Vm cond

#### Half-precision scalar (size == 01)(Armv8.2)

VRINTX{<c>}{<q>}.F16 <Sd>, <Sm>

#### Single-precision scalar (size == 10)

VRINTX{<c>}{<q>}.F32 <Sd>, <Sm>

#### Double-precision scalar (size == 11)

VRINTX{<c>}{<q>}.F64 <Dd>, <Dm>

```if size == '00' || (size == '01' && !HaveFP16Ext()) then UNDEFINED;
if size == '01' && cond != '1110' then UNPREDICTABLE;
exact = TRUE;
case size of
when '01' esize = 16; d = UInt(Vd:D); m = UInt(Vm:M);
when '10' esize = 32; d = UInt(Vd:D); m = UInt(Vm:M);
when '11' esize = 64; d = UInt(D:Vd); m = UInt(M:Vm);```

### T1

 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 1 1 1 0 1 1 1 0 1 D 1 1 0 1 1 1 Vd 1 0 size 0 1 M 0 Vm

#### Half-precision scalar (size == 01)(Armv8.2)

VRINTX{<c>}{<q>}.F16 <Sd>, <Sm>

#### Single-precision scalar (size == 10)

VRINTX{<c>}{<q>}.F32 <Sd>, <Sm>

#### Double-precision scalar (size == 11)

VRINTX{<c>}{<q>}.F64 <Dd>, <Dm>

```if size == '00' || (size == '01' && !HaveFP16Ext()) then UNDEFINED;
if size == '01' && InITBlock()  then UNPREDICTABLE;
exact = TRUE;
case size of
when '01' esize = 16; d = UInt(Vd:D); m = UInt(Vm:M);
when '10' esize = 32; d = UInt(Vd:D); m = UInt(Vm:M);
when '11' esize = 64; d = UInt(D:Vd); m = UInt(M:Vm);```

### CONSTRAINED UNPREDICTABLE behavior

If InITBlock(), then one of the following behaviors must occur:

• The instruction is undefined.
• The instruction executes as if it passes the Condition code check.
• The instruction executes as NOP. This means it behaves as if it fails the Condition code check.

### Assembler Symbols



 Is the 32-bit name of the SIMD&FP destination register, encoded in the "Vd:D" field.
 Is the 32-bit name of the SIMD&FP source register, encoded in the "Vm:M" field.

Is the 64-bit name of the SIMD&FP destination register, encoded in the "D:Vd" field.
 Is the 64-bit name of the SIMD&FP source register, encoded in the "M:Vm" field.

### Operation

```if ConditionPassed() then
EncodingSpecificOperations(); CheckVFPEnabled(TRUE);
rounding = FPRoundingMode(FPSCR);
case esize of
when 16
S[d] = Zeros(16) : FPRoundInt(S[m]<15:0>, FPSCR, rounding, exact);
when 32
S[d] = FPRoundInt(S[m], FPSCR, rounding, exact);
when 64
D[d] = FPRoundInt(D[m], FPSCR, rounding, exact);```