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-rw-r--r--lib/erl_interface/src/decode/decode_big.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/lib/erl_interface/src/decode/decode_big.c b/lib/erl_interface/src/decode/decode_big.c
index b87d97d634..477880b331 100644
--- a/lib/erl_interface/src/decode/decode_big.c
+++ b/lib/erl_interface/src/decode/decode_big.c
@@ -153,6 +153,17 @@ int ei_big_comp(erlang_big *x, erlang_big *y)
#ifdef USE_ISINF_ISNAN /* simulate 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)