v_fma_mixhi_f16 GPU Native ISA AMD Vector

V FMA MIXHI F16 Vector Packed Arithmetic

v_fma_mixhi_f16

Multiply two inputs and add a third input using fused multiply add where the inputs are a mix of half-precision float and single-precision float…

Encoding

Verified bit-level encoding data is not yet available for this instruction. The instruction-format classification below (VOP3P) is well-documented and stable; exact per-target opcode/field bit positions have not yet been imported from a verified source.
Format VOP3P
Execution Unit

Operands

Operand details have not yet been curated for this instruction.

GFX Target Compatibility

TargetSupport
gfx1100✅ Supported

Related

More in Vector Packed Arithmetic

Reference

AMDGPU / GFX ISA

Description

Multiply two inputs and add a third input using fused multiply add where the inputs are a mix of half-precision float and single-precision float values. Convert the result to a half-precision float. Store the result into the high bits of a vector register.

Example

v_fma_mixhi_f16 v5, s1, s2, v3

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