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FMOV (scalar, immediate)

Floating-point move immediate (scalar). This instruction copies a floating-point immediate constant into the SIMD&FP destination register.

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.

313029282726252423222120191817161514131211109876543210
00011110type1imm810000000Rd

Half-precision (type == 11)
(Armv8.2)

FMOV <Hd>, #<imm>

Single-precision (type == 00)

FMOV <Sd>, #<imm>

Double-precision (type == 01)

FMOV <Dd>, #<imm>

integer d = UInt(Rd);

integer datasize;
case type of
    when '00' datasize = 32;
    when '01' datasize = 64;
    when '10' UNDEFINED;
    when '11'
        if HaveFP16Ext() then
            datasize = 16;
        else
            UNDEFINED;

bits(datasize) imm = VFPExpandImm(imm8);

Assembler Symbols

<Dd>

Is the 64-bit name of the SIMD&FP destination register, encoded in the "Rd" field.

<Hd>

Is the 16-bit name of the SIMD&FP destination register, encoded in the "Rd" field.

<Sd>

Is the 32-bit name of the SIMD&FP destination register, encoded in the "Rd" field.

<imm>

Is a signed floating-point constant with 3-bit exponent and normalized 4 bits of precision, encoded in the "imm8" field. For details of the range of constants available and the encoding of <imm>, see Modified immediate constants in A64 floating-point instructions.

Operation

CheckFPAdvSIMDEnabled64();

V[d] = imm;
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