SVE Instruction List by Dougall Johnson
# BEXT: Gather lower bits from positions selected by bitmask

BEXT Zd.D, Zn.D, Zm.D (SVE2+BitPerm+NS

svuint64_t svbext[_u64](svuint64_t op1, svuint64_t op2)

## 128-bit SVE

Within each 64-bit lane, extract bits from (1) at positions indicated by the non-zero bits from (2), and place them in the least-significant bits of (3), zeroing upper any upper bits. The order of the bits is preserved.

## 256-bit SVE

Within each 64-bit lane, extract bits from (1) at positions indicated by the non-zero bits from (2), and place them in the least-significant bits of (3), zeroing upper any upper bits. The order of the bits is preserved.

## 512-bit SVE

Within each 64-bit lane, extract bits from (1) at positions indicated by the non-zero bits from (2), and place them in the least-significant bits of (3), zeroing upper any upper bits. The order of the bits is preserved.

## Larger sizes

## 1024-bit SVE

Within each 64-bit lane, extract bits from (1) at positions indicated by the non-zero bits from (2), and place them in the least-significant bits of (3), zeroing upper any upper bits. The order of the bits is preserved.

## 2048-bit SVE

Within each 64-bit lane, extract bits from (1) at positions indicated by the non-zero bits from (2), and place them in the least-significant bits of (3), zeroing upper any upper bits. The order of the bits is preserved.

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Inspired by and based on the x86/x64 SIMD Instruction List by Daytime.