[clang] [llvm] [SystemZ] Add support for half (fp16) (PR #109164)

[Matt Arsenault via cfe-commits]

================
@@ -0,0 +1,85 @@
+// RUN: %clang_cc1 -triple s390x-linux-gnu \
+// RUN: -ffloat16-excess-precision=standard -emit-llvm -o - %s \
+// RUN: | FileCheck %s -check-prefix=STANDARD
+
+// RUN: %clang_cc1 -triple s390x-linux-gnu \
+// RUN: -ffloat16-excess-precision=none -emit-llvm -o - %s \
+// RUN: | FileCheck %s -check-prefix=NONE
+
+// RUN: %clang_cc1 -triple s390x-linux-gnu \
+// RUN: -ffloat16-excess-precision=fast -emit-llvm -o - %s \
+// RUN: | FileCheck %s -check-prefix=FAST
+
+_Float16 f(_Float16 a, _Float16 b, _Float16 c, _Float16 d) {
+    return a * b + c * d;
+}
+
----------------
arsenm wrote:

Test vector cases 

https://github.com/llvm/llvm-project/pull/109164