v_fma_legacy_f32 GPU Native ISA AMD Vector

V FMA LEGACY F32 Vector Arithmetic

v_fma_legacy_f32

Multiply and add single-precision values. Follows DX9 rules where 0.0 times anything produces 0.0.

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

Per-target GFX compatibility has not yet been verified for this instruction.

Related

More in Vector Arithmetic

Reference

AMDGPU / GFX ISA

Example

v_fma_legacy_f32 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