Add minimal soft floating point implementation

1 files changed, 56 insertions, 0 deletions

diff --git a/tests/test_data.h b/tests/test_data.h
new file mode 100644
index 00000000..ba8b860b
--- /dev/null
+++ b/tests/test_data.h
@@ -0,0 +1,56 @@
+/*
+  Copyright 2019 David Robillard <http://drobilla.net>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <stdint.h>
+#include <string.h>
+
+/// Linear Congruential Generator for making random floats
+static inline uint32_t
+lcg32(const uint32_t i)
+{
+	static const uint32_t a = 134775813u;
+	static const uint32_t c = 1u;
+
+	return (a * i) + c;
+}
+
+/// Linear Congruential Generator for making random doubles
+static inline uint64_t
+lcg64(const uint64_t i)
+{
+	static const uint64_t a = 6364136223846793005ull;
+	static const uint64_t c = 1ull;
+
+	return (a * i) + c;
+}
+
+/// Return the float with representation `rep`
+static inline float
+float_from_rep(const uint32_t rep)
+{
+	float f;
+	memcpy(&f, &rep, sizeof(f));
+	return f;
+}
+
+/// Return the double with representation `rep`
+static inline double
+double_from_rep(const uint64_t rep)
+{
+	double d;
+	memcpy(&d, &rep, sizeof(d));
+	return d;
+}