On Don, 2013-02-07 at 17:23 -0500, Tom Stellard wrote: > From: Tom Stellard <thomas.stell...@amd.com> > > NOTE: This is a candidate for the Mesa stable branches > --- > lib/Target/R600/R600Instructions.td | 7 +++++++ > 1 files changed, 7 insertions(+), 0 deletions(-) > > diff --git a/lib/Target/R600/R600Instructions.td > b/lib/Target/R600/R600Instructions.td > index d307ed2..07ee6f0 100644 > --- a/lib/Target/R600/R600Instructions.td > +++ b/lib/Target/R600/R600Instructions.td > @@ -1109,6 +1109,11 @@ class TGSI_LIT_Z_Common <InstR600 mul_lit, InstR600 > log_clamped, InstR600 exp_ie > (exp_ieee (mul_lit (log_clamped (MAX R600_Reg32:$src_y, (f32 ZERO))), > R600_Reg32:$src_w, R600_Reg32:$src_x)) > >; > > +class FMAPat <InstR600 muladd> : Pat< > + (fma R600_Reg32:$src0, R600_Reg32:$src1, R600_Reg32:$src2), > + (muladd R600_Reg32:$src0, R600_Reg32:$src1, R600_Reg32:$src2) > +>; > + > > //===----------------------------------------------------------------------===// > // R600 / R700 Instructions > > //===----------------------------------------------------------------------===// > @@ -1167,6 +1172,7 @@ let Predicates = [isR600] in { > let Word1{31} = 1; // BARRIER > } > defm : SteamOutputExportPattern<R600_ExportBuf, 0x20, 0x21, 0x22, 0x23>; > + def : FMAPat <MULADD_r600>; > } > > // Helper pattern for normalizing inputs to triginomic instructions for R700+ > @@ -1320,6 +1326,7 @@ let hasSideEffects = 1 in { > let Word1{31} = 1; // BARRIER > } > defm : SteamOutputExportPattern<EG_ExportBuf, 0x40, 0x41, 0x42, 0x43>; > + def : FMAPat <MULADD_eg>; > > > //===----------------------------------------------------------------------===// > // Memory read/write instructions
Do the MULADD instructions match the FMA semantics, i.e. they don't round/truncate the intermediate product but only the final sum? Patch 1 looks nice and is Reviewed-by: Michel Dänzer <michel.daen...@amd.com> -- Earthling Michel Dänzer | http://www.amd.com Libre software enthusiast | Debian, X and DRI developer _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev