trees: Update softfloat for armv6m

Author: jonnor

src/emltrees/Makefile

@@ -22,7 +22,7 @@ SRC = trees.c trees.py
 
 # Stuff to make soft-float work
 # If symbols are undefined, use tools/find_symbols.py to locate object files to add
-SOFTFP_O := _arm_cmpsf2.o lesf2.o _arm_fixsfsi.o fixsfsi.o eqsf2.o gesf2.o _arm_addsubsf3.o _arm_muldivsf3.o
+SOFTFP_O := _arm_cmpsf2.o lesf2.o _arm_fixsfsi.o fixsfsi.o eqsf2.o gesf2.o _arm_addsubsf3.o _arm_muldivsf3.o addsf3.o _clzsi2.o _udivsi3.o floatsisf.o divsf3.o _thumb1_case_uqi.o
 XTENSA_SOFTFP_O := _divsf3.o
 SOFTFP_ENABLE := 0
 ifeq ($(ARCH), armv6m)

src/emltrees/trees.c

@@ -18,6 +18,12 @@ void *memset(void *s, int c, size_t n) {
 }
 #endif
 
+// Softfloat
+int
+__aeabi_idiv0(int return_value) {
+  return return_value;
+}
+
 
 // For building up an EmlTrees structure
 typedef struct _EmlTreesBuilder {