v_lshl_or_b32 GPU Native ISA AMD Vector

V LSHL OR B32 Vector Arithmetic

v_lshl_or_b32

Given a shift count in the second input, calculate the logical shift left of the first input, then calculate the bitwise OR of the intermediate…

Encoding

Verified bit-level encoding data is not yet available for this instruction. The instruction-format classification below (VOP3) is well-documented and stable; exact per-target opcode/field bit positions have not yet been imported from a verified source.
Format VOP3
Execution Unit

Operands

Operand details have not yet been curated for this instruction.

GFX Target Compatibility

TargetSupport
gfx1100✅ Supported

Related

More in Vector Arithmetic

Reference

AMDGPU / GFX ISA

Description

Given a shift count in the second input, calculate the logical shift left of the first input, then calculate the bitwise OR of the intermediate result and the third input, then store the final result into a vector register.

Semantics

D0.u32 = ((S0.u32 << S1.u32[4 : 0].u32) | S2.u32)

Example

v_lshl_or_b32 v5, v1, v2, s3

A real instruction accepted by the LLVM assembler, taken verbatim from LLVM's own AMDGPU MC test suite (gfx11). Not from an AMD document, and not authored here.

Sources