s_abs_i32 GPU Native ISA AMD Scalar
S ABS I32 Scalar Arithmetic
s_abs_i32
Compute the absolute value of a scalar input, store the result into a scalar register and set SCC iff the result is nonzero.
Encoding
Verified bit-level encoding data is not yet available for this instruction.
The instruction-format classification below (SOP1)
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 Scalar Arithmetic
Reference
AMDGPU / GFX ISA
Semantics
D0.i32 = S0.i32 < 0 ? -S0.i32 : S0.i32;
SCC = D0.i32 != 0
Example
S_ABS_I32(0x00000001) => 0x00000001
S_ABS_I32(0x7fffffff) => 0x7fffffff
S_ABS_I32(0x80000000) => 0x80000000 // Note this is negative!
S_ABS_I32(0x80000001) => 0x7fffffffReproduced from AMD's official "AMD Instinct MI300" ISA Reference Guide for technical accuracy.
Sources
- User Guide for AMDGPU Backend ↗ - LLVM Project
-
"AMD Instinct MI300" Instruction Set Architecture: Reference Guide ↗
- Advanced Micro Devices, Inc.
Reference Guide, page 129.