chore(test): add test for __bf16/BFLT16 predefined macros

Author: bassiounix

clang/test/Preprocessor/bfloat16-macros.c

@@ -0,0 +1,17 @@
+// RUN: %clang_cc1 -E -dM -ffreestanding < /dev/null | FileCheck -match-full-lines -check-prefix BFLT16 %s
+
+// BFLT16: #define __BFLT16_DECIMAL_DIG__ 4
+// BFLT16: #define __BFLT16_DENORM_MIN__ 9.18354961579912115600575419704879436e-41BF16
+// BFLT16: #define __BFLT16_DIG__ 2
+// BFLT16: #define __BFLT16_EPSILON__ 7.8125e-3BF16
+// BFLT16: #define __BFLT16_HAS_DENORM__ 1
+// BFLT16: #define __BFLT16_HAS_INFINITY__ 1
+// BFLT16: #define __BFLT16_HAS_QUIET_NAN__ 1
+// BFLT16: #define __BFLT16_MANT_DIG__ 8
+// BFLT16: #define __BFLT16_MAX_10_EXP__ 38
+// BFLT16: #define __BFLT16_MAX_EXP__ 128
+// BFLT16: #define __BFLT16_MAX__ 3.38953138925153547590470800371487867e+38BF16
+// BFLT16: #define __BFLT16_MIN_10_EXP__ (-37)
+// BFLT16: #define __BFLT16_MIN_EXP__ (-125)
+// BFLT16: #define __BFLT16_MIN__ 1.17549435082228750796873653722224568e-38BF16
+// BFLT16: #define __BFLT16_NORM_MAX__ 3.38953138925153547590470800371487867e+38BF16