On Espressif's ESP8266 (based on Tensilica LX106, no hardware divider),
this patch reduces the size of each:
__moddi3() @ libgcc.a : 969 -> 301 (saves 668)
__divmoddi4() : 1111 -> 426 (saves 685)
__udivmoddi4() : 1043 -> 319 (saves 724)
in bytes, respectively.
gcc/ChangeLog:
* config/xtensa/xtensa.h (TARGET_HAS_NO_HW_DIVIDE): New macro
definition.
---
gcc/config/xtensa/xtensa.h | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/gcc/config/xtensa/xtensa.h b/gcc/config/xtensa/xtensa.h
index 00e2930b30a..d25594f0c1f 100644
--- a/gcc/config/xtensa/xtensa.h
+++ b/gcc/config/xtensa/xtensa.h
@@ -75,6 +75,11 @@ along with GCC; see the file COPYING3. If not see
#define HAVE_AS_TLS 0
#endif
+/* Define this if the target has no hardware divide instructions. */
+#if !TARGET_DIV32
+#define TARGET_HAS_NO_HW_DIVIDE
+#endif
+
/* Target CPU builtins. */
#define TARGET_CPU_CPP_BUILTINS() \
--
2.20.1
