ds_or_rtn_b64 GPU Native ISA AMD Vector
DS OR RTN B64 LDS / Data Share
ds_or_rtn_b64
Calculate bitwise OR given two unsigned 64-bit integer values stored in the data register and a location in a data share.
Encoding
Verified bit-level encoding data is not yet available for this instruction.
The instruction-format classification below (DS)
is well-documented and stable; exact per-target opcode/field bit positions have not
yet been imported from a verified source.
Operands
Operand details have not yet been curated for this instruction.
GFX Target Compatibility
| Target | Support |
|---|---|
| gfx1100 | ✅ Supported |
Related
More in LDS / Data Share
Reference
AMDGPU / GFX ISA
Description
Calculate bitwise OR given two unsigned 64-bit integer values stored in the data register and a location in a data share. Store the original value from data share into a vector register.
Semantics
addr = CalcDsAddr(ADDR.b32, OFFSET0.b32, OFFSET1.b32);
tmp = MEM[addr].b64;
MEM[addr].b64 = (tmp | DATA.b64);
RETURN_DATA.b64 = tmp
Example
ds_or_rtn_b64 v[5:6], v1, v[2:3]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
- User Guide for AMDGPU Backend ↗ - LLVM Project
-
"AMD Instinct MI300" Instruction Set Architecture: Reference Guide ↗
- Advanced Micro Devices, Inc.
Reference Guide, page 448. - LLVM MC assembler tests for AMDGPU (gfx11) ↗ - LLVM Project