s_sleep GPU Native ISA AMD Scalar
S SLEEP Branch & Control
s_sleep
Cause a wave to sleep for up to ~8000 clocks.
Encoding
Verified bit-level encoding data is not yet available for this instruction.
The instruction-format classification below (SOPP)
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 |
Examples: s_sleep 0 // Wait for 0 clocks. s_sleep 1 // Wait for 1-64 clocks. s_sleep 2 // Wait for 65-128 clocks.
Related
More in Branch & Control
Reference
AMDGPU / GFX ISA
Description
Cause a wave to sleep for up to ~8000 clocks. The wave sleeps for (64*(SIMM16[6:0]-1) .. 64*SIMM16[6:0]) clocks. The exact amount of delay is approximate. Compare with S_NOP. When SIMM16[6:0] is zero then no sleep occurs.
Example
s_sleep 0x0A 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 142. - LLVM MC assembler tests for AMDGPU (gfx11) ↗ - LLVM Project