v_rndne_f64 GPU Native ISA AMD Vector
V RNDNE F64 Vector Arithmetic
v_rndne_f64
Round the double-precision float input to the nearest even integer and store the result in floating point format into a vector register.
Encoding
Verified bit-level encoding data is not yet available for this instruction.
The instruction-format classification below (VOP1)
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 Vector Arithmetic
Reference
AMDGPU / GFX ISA
Semantics
D0.f64 = floor(S0.f64 + 0.5);
if (isEven(floor(S0.f64)) && (fract(S0.f64) == 0.5)) then
D0.f64 -= 1.0
endif
Example
v_rndne_f64 v[5:6], -1A 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 193. - LLVM MC assembler tests for AMDGPU (gfx11) ↗ - LLVM Project