[RISCV][GISel] Add legalization for more fp128 libcalls.

Author: topperc

llvm/lib/Target/RISCV/GISel/RISCVLegalizerInfo.cpp

@@ -598,7 +598,8 @@ RISCVLegalizerInfo::RISCVLegalizerInfo(const RISCVSubtarget &ST)
       .legalFor(ST.hasStdExtZfa(), {s32})
       .legalFor(ST.hasStdExtZfa() && ST.hasStdExtD(), {s64})
       .legalFor(ST.hasStdExtZfa() && ST.hasStdExtZfh(), {s16})
-      .libcallFor({s32, s64});
+      .libcallFor({s32, s64})
+      .libcallFor(ST.is64Bit(), {s128});
 
   getActionDefinitionsBuilder({G_FMAXIMUM, G_FMINIMUM})
       .legalFor(ST.hasStdExtZfa(), {s32})
@@ -609,9 +610,11 @@ RISCVLegalizerInfo::RISCVLegalizerInfo(const RISCVSubtarget &ST)
                                G_FLOG10, G_FEXP, G_FEXP2, G_FEXP10, G_FACOS,
                                G_FASIN, G_FATAN, G_FATAN2, G_FCOSH, G_FSINH,
                                G_FTANH})
-      .libcallFor({s32, s64});
+      .libcallFor({s32, s64})
+      .libcallFor(ST.is64Bit(), {s128});
   getActionDefinitionsBuilder({G_FPOWI, G_FLDEXP})
-      .libcallFor({{s32, s32}, {s64, s32}});
+      .libcallFor({{s32, s32}, {s64, s32}})
+      .libcallFor(ST.is64Bit(), {s128, s32});
 
   getActionDefinitionsBuilder(G_VASTART).customFor({p0});