Implement builtins for Neon half-precision float conversions.

Also tweak the VCVT_F32_F16 entry in arm_neon.td to be more consistent with
the other floating-point conversion builtins.  Radar 8068427.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@121916 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/clang/Basic/arm_neon.td b/include/clang/Basic/arm_neon.td
index d366d6938e4bd2fca87932d9c841a49ee5e497ee..880a0da6bc689bfeb67d9acf3db52d9c290a468a 100644 (file)
--- a/include/clang/Basic/arm_neon.td
+++ b/include/clang/Basic/arm_neon.td
@@ -303,7 +303,7 @@ def VCVT_F16     : SInst<"vcvt_f16", "hk",  "f">;
 def VCVT_N_S32   : SInst<"vcvt_n_s32", "xdi", "fQf">;
 def VCVT_N_U32   : SInst<"vcvt_n_u32", "udi", "fQf">;
 def VCVT_F32     : SInst<"vcvt_f32", "fd",  "iUiQiQUi">;
-def VCVT_F32_F16 : SInst<"vcvt_f32_f16", "kh",  "f">;
+def VCVT_F32_F16 : SInst<"vcvt_f32_f16", "fd",  "h">;
 def VCVT_N_F32   : SInst<"vcvt_n_f32", "fdi", "iUiQiQUi">;
 def VMOVN        : IInst<"vmovn", "hk",  "silUsUiUl">;
 def VMOVL        : SInst<"vmovl", "wd",  "csiUcUsUi">;

diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp
index 19c3fbb1fa595ffc8f22cf82b472cbde43c5c44b..3fc5efd7f32b4ca8886a9fbff4ee603cc1d78267 100644 (file)
--- a/lib/CodeGen/CGBuiltin.cpp
+++ b/lib/CodeGen/CGBuiltin.cpp
@@ -1226,7 +1226,16 @@ Value *CodeGenFunction::EmitARMBuiltinExpr(unsigned BuiltinID,
     Function *F = CGM.getIntrinsic(Intrinsic::arm_neon_vcnt, &Ty, 1);
     return EmitNeonCall(F, Ops, "vcnt");
   }
-  // FIXME: intrinsics for f16<->f32 convert missing from ARM target.
+  case ARM::BI__builtin_neon_vcvt_f16_v: {
+    assert((type & 0x7) == 7 && !quad && "unexpected vcvt_f16_v builtin");
+    Function *F = CGM.getIntrinsic(Intrinsic::arm_neon_vcvtfp2hf);
+    return EmitNeonCall(F, Ops, "vcvt");
+  }
+  case ARM::BI__builtin_neon_vcvt_f32_f16: {
+    assert((type & 0x7) == 7 && !quad && "unexpected vcvt_f32_f16 builtin");
+    Function *F = CGM.getIntrinsic(Intrinsic::arm_neon_vcvthf2fp);
+    return EmitNeonCall(F, Ops, "vcvt");
+  }
   case ARM::BI__builtin_neon_vcvt_f32_v:
   case ARM::BI__builtin_neon_vcvtq_f32_v: {
     Ops[0] = Builder.CreateBitCast(Ops[0], Ty);