nanohub: remove -fshort-double
-fshort-double has been removed from recent gcc versions
and is not supported by clang.
Removed flag
Define a new CHRE_LOG entry point to handle sizeof(double) == 8
and leave the old to handle old chre apps that were compiled with
sizeof(double) == 4.
Add builtins to handle float -> double conversion (using gcc's
caused crashes)
Removed -lgcc from apps (we shouldn't be pulling in any functions from
libgcc.a) and added -nostdlib flag
Bug: 28938849
Test: nanoapps build/chreLog %f works same as before
Change-Id: I72a91dcfdfc2b0eba3211ac719381fcb0a0ae7ed
Signed-off-by: Ben Fennema <[email protected]>
diff --git a/firmware/lib/builtins/fp_extend.h b/firmware/lib/builtins/fp_extend.h
new file mode 100644
index 0000000..bff285a
--- /dev/null
+++ b/firmware/lib/builtins/fp_extend.h
@@ -0,0 +1,89 @@
+//===-lib/fp_extend.h - low precision -> high precision conversion -*- C -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Set source and destination setting
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef FP_EXTEND_HEADER
+#define FP_EXTEND_HEADER
+
+#include "int_lib.h"
+
+#if defined SRC_SINGLE
+typedef float src_t;
+typedef su_int src_rep_t;
+#define SRC_REP_C(c) c ## UL
+static const int srcSigBits = 23;
+#define src_rep_t_clz __builtin_clz
+
+#elif defined SRC_DOUBLE
+typedef double src_t;
+typedef du_int src_rep_t;
+#define SRC_REP_C(c) c ## ULL
+static const int srcSigBits = 52;
+static __inline int src_rep_t_clz(src_rep_t a) {
+#if defined __LP64__
+ return __builtin_clzl(a);
+#else
+ if (a & REP_C(0xffffffff00000000))
+ return __builtin_clz(a >> 32);
+ else
+ return 32 + __builtin_clz(a & REP_C(0xffffffff));
+#endif
+}
+
+#elif defined SRC_HALF
+typedef uint16_t src_t;
+typedef uint16_t src_rep_t;
+#define SRC_REP_C UINT16_C
+static const int srcSigBits = 10;
+#define src_rep_t_clz __builtin_clz
+
+#else
+#error Source should be half, single, or double precision!
+#endif //end source precision
+
+#if defined DST_SINGLE
+typedef float dst_t;
+typedef su_int dst_rep_t;
+#define DST_REP_C(c) c ## UL
+static const int dstSigBits = 23;
+
+#elif defined DST_DOUBLE
+typedef double dst_t;
+typedef du_int dst_rep_t;
+#define DST_REP_C(c) c ## ULL
+static const int dstSigBits = 52;
+
+#elif defined DST_QUAD
+typedef long double dst_t;
+typedef __uint128_t dst_rep_t;
+#define DST_REP_C (__uint128_t)
+static const int dstSigBits = 112;
+
+#else
+#error Destination should be single, double, or quad precision!
+#endif //end destination precision
+
+// End of specialization parameters. Two helper routines for conversion to and
+// from the representation of floating-point data as integer values follow.
+
+static __inline src_rep_t srcToRep(src_t x) {
+ const union { src_t f; src_rep_t i; } rep = {.f = x};
+ return rep.i;
+}
+
+static __inline dst_t dstFromRep(dst_rep_t x) {
+ const union { dst_t f; dst_rep_t i; } rep = {.i = x};
+ return rep.f;
+}
+// End helper routines. Conversion implementation follows.
+
+#endif //FP_EXTEND_HEADER
