tests/tcg: add float_madds test to multiarch

This is a generic floating point multiply and accumulate test for
single precision floating point values. I've split of the common float
functions into a helper library so additional tests can use the same
common code.

As I don't have references for all architectures I've allowed some
flexibility for tests to pass without reference files. They can be
added as we get collect them.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/tests/tcg/multiarch/float_helpers.h b/tests/tcg/multiarch/float_helpers.h
new file mode 100644
index 0000000000..6337bc66c1
--- /dev/null
+++ b/tests/tcg/multiarch/float_helpers.h
@@ -0,0 +1,26 @@
+/*
+ * Common Float Helpers
+ *
+ * Copyright (c) 2019 Linaro
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#include <inttypes.h>
+
+/* Number of constants in each table */
+int get_num_f16(void);
+int get_num_f32(void);
+int get_num_f64(void);
+
+/* Accessor helpers, overflows will automatically wrap */
+uint16_t get_f16(int i); /* use _Float16 when we can */
+float    get_f32(int i);
+double   get_f64(int i);
+
+/* Return format strings, free after use */
+char * fmt_f16(uint16_t);
+char * fmt_f32(float);
+char * fmt_f64(double);
+/* exception flags */
+char * fmt_flags(void);