Developer Guide and Reference

Contents

_blsr_u32/64

Copies all bits from the source operand to the destination and resets (=0) the bit position in the destination that corresponds to the lowest set bit of the source operand. The corresponding Intel® AVX2 instruction is
BLSR
.

Syntax

extern unsigned int _blsr_u32(unsigned int s1);
extern unsigned __int64 _blsr_u64(unsigned __int64 s1);
Arguments
s1
the source operand from where the bits are copied
Description
Copies all bits from the source operand to the destination and resets (=0) the bit position in the destination that corresponds to the lowest set bit of the source operand.
Returns
Result of the operation

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804