CountBitsCntSameAsSignBit

Product	Supported/Unsupported
Atlas A3 training products/Atlas A3 inference products	√
Atlas A2 training products/Atlas A2 inference products	√
Atlas 200I/500 A2 inference products	x
Atlas inference product's AI Core	√
Atlas inference product's Vector Core	x
Atlas training products	x

Computes the number of consecutive bits that are the same as the sign bit from the most significant bit in the binary number of the int64_t type.

If the input is -1 (all bits are 1) or 0 (all bits are 0), -1 is returned.

__aicore__ inline int64_t CountBitsCntSameAsSignBit(int64_t valueIn)

**Table 1** Parameters
Parameter	Input/Output	Description
valueIn	Input	Input data of the int64_t type.

The number of consecutive bits that are the same as the sign bit starting from the most significant bit.

None

int64_t valueIn = 0x0f00000000000000;
// Output (ans): 3
int64_t ans = AscendC::CountBitsCntSameAsSignBit(valueIn);

Parent topic: Scalar Computation