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SIMD ISAReturn TypeNameArgumentsInstruction Group
Neonfloat64_tvrecpxd_f64(float64_t a)Vector arithmetic / Reciprocal / Reciprocal exponent
Description
Floating-point Reciprocal exponent (scalar). This instruction finds an approximate reciprocal exponent for each vector element in the source SIMD&FP register, places the result in a vector, and writes the vector to the destination SIMD&FP register.
Results
Dd result
This intrinsic compiles to the following instructions:

FRECPX Dd,Dn

Argument Preparation
a register: Dn
Architectures
A64

Operation

CheckFPAdvSIMDEnabled64();
bits(datasize) operand = V[n];

FPCRType fpcr    = FPCR[];
boolean merge    = elements == 1 && IsMerging(fpcr);
bits(128) result = if merge then V[d] else Zeros();
bits(esize) element;

for e = 0 to elements-1
    element = Elem[operand, e, esize];
    Elem[result, e, esize] = FPRecpX(element, fpcr);

V[d] = result;