CountBitsCntSameAsSignBit

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.

Kirin 9020 series processors

Kirin 9030 series processors

Kirin X90 series processors

None

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