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SIMD ISAReturn TypeNameArgumentsInstruction Group
Neonuint32_tvcltzs_f32(float32_t a)Compare / Less than
Description
Floating-point Compare Less than zero (vector). This instruction reads each floating-point value in the source SIMD&FP register and if the value is less than zero sets every bit of the corresponding vector element in the destination SIMD&FP register to one, otherwise sets every bit of the corresponding vector element in the destination SIMD&FP register to zero.
Results
Sd result
This intrinsic compiles to the following instructions:

FCMLT Sd,Sn,#0

Argument Preparation
a register: Sn
Architectures
A64

Operation

CheckFPAdvSIMDEnabled64();
bits(datasize) operand = V[n];
bits(datasize) result;
bits(esize) zero = FPZero('0');
bits(esize) element;
boolean test_passed;

for e = 0 to elements-1
    element = Elem[operand, e, esize];
    case comparison of
        when CompareOp_GT test_passed = FPCompareGT(element, zero, FPCR[]);
        when CompareOp_GE test_passed = FPCompareGE(element, zero, FPCR[]);
        when CompareOp_EQ test_passed = FPCompareEQ(element, zero, FPCR[]);
        when CompareOp_LE test_passed = FPCompareGE(zero, element, FPCR[]);
        when CompareOp_LT test_passed = FPCompareGT(zero, element, FPCR[]);
    Elem[result, e, esize] = if test_passed then Ones() else Zeros();

V[d] = result;