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| -rw-r--r-- | docs/LangRef.rst | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/docs/LangRef.rst b/docs/LangRef.rst index 02c881bae6..d6cdbc4284 100644 --- a/docs/LangRef.rst +++ b/docs/LangRef.rst @@ -7689,8 +7689,10 @@ Overview: """"""""" The '``llvm.fmuladd.*``' intrinsic functions represent multiply-add -expressions that can be fused if the code generator determines that the -fused expression would be legal and efficient. +expressions that can be fused if the code generator determines that (a) the +target instruction set has support for a fused operation, and (b) that the +fused operation is more efficient than the equivalent, separate pair of mul +and add instructions. Arguments: """""""""" |