diff options
Diffstat (limited to 'compiler/GHC/Driver/Config/StgToCmm.hs')
| -rw-r--r-- | compiler/GHC/Driver/Config/StgToCmm.hs | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/compiler/GHC/Driver/Config/StgToCmm.hs b/compiler/GHC/Driver/Config/StgToCmm.hs index 283ece1d50..f738974c46 100644 --- a/compiler/GHC/Driver/Config/StgToCmm.hs +++ b/compiler/GHC/Driver/Config/StgToCmm.hs @@ -1,3 +1,6 @@ +{-# LANGUAGE LambdaCase #-} +{-# LANGUAGE MultiWayIf #-} + module GHC.Driver.Config.StgToCmm ( initStgToCmmConfig ) where @@ -6,6 +9,7 @@ import GHC.Prelude.Basic import GHC.StgToCmm.Config +import GHC.Cmm.MachOp ( FMASign(..)) import GHC.Driver.Backend import GHC.Driver.Session import GHC.Platform @@ -50,6 +54,24 @@ initStgToCmmConfig dflags mod = StgToCmmConfig , stgToCmmAllowQuotRemInstr = ncg && (x86ish || ppc) , stgToCmmAllowQuotRem2 = (ncg && (x86ish || ppc)) || llvm , stgToCmmAllowExtendedAddSubInstrs = (ncg && (x86ish || ppc)) || llvm + , stgToCmmAllowFMAInstr = + if + | not (isFmaEnabled dflags) + || not (ncg || llvm) + -- If we're not using the native code generator or LLVM, + -- fall back to the generic implementation. + || platformArch platform == ArchWasm32 + -- WASM doesn't support native FMA instructions (at the time of writing). + -> const False + + -- FNMSub and FNMAdd have different semantics on PowerPC, + -- so we avoid using them. + | ppc + -> \ case { FMAdd -> True; FMSub -> True; _ -> False } + + | otherwise + -> const True + , stgToCmmAllowIntMul2Instr = (ncg && x86ish) || llvm -- SIMD flags , stgToCmmVecInstrsErr = vec_err |