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-rw-r--r--lib/erl_interface/src/decode/decode_big.c22
1 files changed, 19 insertions, 3 deletions
diff --git a/lib/erl_interface/src/decode/decode_big.c b/lib/erl_interface/src/decode/decode_big.c
index b54ac85be2..477880b331 100644
--- a/lib/erl_interface/src/decode/decode_big.c
+++ b/lib/erl_interface/src/decode/decode_big.c
@@ -151,13 +151,29 @@ int ei_big_comp(erlang_big *x, erlang_big *y)
#endif
#ifdef USE_ISINF_ISNAN /* simulate finite() */
-# define finite(f) (!isinf(f) && !isnan(f))
-# define HAVE_FINITE
+# define isfinite(f) (!isinf(f) && !isnan(f))
+# define HAVE_ISFINITE
+#elif defined(__GNUC__) && defined(HAVE_FINITE)
+/* We use finite in gcc as it emits assembler instead of
+ the function call that isfinite emits. The assembler is
+ significantly faster. */
+# ifdef isfinite
+# undef isfinite
+# endif
+# define isfinite finite
+# ifndef HAVE_ISFINITE
+# define HAVE_ISFINITE
+# endif
+#elif defined(isfinite) && !defined(HAVE_ISFINITE)
+# define HAVE_ISFINITE
+#elif !defined(HAVE_ISFINITE) && defined(HAVE_FINITE)
+# define isfinite finite
+# define HAVE_ISFINITE
#endif
#ifdef NO_FPE_SIGNALS
# define ERTS_FP_CHECK_INIT() do {} while (0)
-# define ERTS_FP_ERROR(f, Action) if (!finite(f)) { Action; } else {}
+# define ERTS_FP_ERROR(f, Action) if (!isfinite(f)) { Action; } else {}
# define ERTS_SAVE_FP_EXCEPTION()
# define ERTS_RESTORE_FP_EXCEPTION()
#else