Move float epsilon to bh_platform

Author: no1wudi

core/iwasm/aot/aot_intrinsic.c

@@ -421,14 +421,12 @@ aot_intrinsic_f64_to_f32(float64 f)
     return (float32)f;
 }
 
-/* The epsilon value is from https://www.cplusplus.com/reference/cfloat/ */
-
 int32
 aot_intrinsic_f32_cmp(AOTFloatCond cond, float32 lhs, float32 rhs)
 {
     switch (cond) {
         case FLOAT_EQ:
-            return fabsf(lhs - rhs) <= 1e-5f ? 1 : 0;
+            return (float32)fabs(lhs - rhs) <= WA_FLT_EPSILON ? 1 : 0;
 
         case FLOAT_LT:
             return lhs < rhs ? 1 : 0;
@@ -459,7 +457,7 @@ aot_intrinsic_f64_cmp(AOTFloatCond cond, float64 lhs, float64 rhs)
 {
     switch (cond) {
         case FLOAT_EQ:
-            return fabs(lhs - rhs) <= 1e-9 ? 1 : 0;
+            return fabs(lhs - rhs) <= WA_DBL_EPSILON ? 1 : 0;
 
         case FLOAT_LT:
             return lhs < rhs ? 1 : 0;

core/shared/utils/bh_platform.h

@@ -35,4 +35,9 @@
 #define WA_FREE wasm_runtime_free
 #endif
 
+/* The epsilon value is from https://www.cplusplus.com/reference/cfloat/ */
+
+#define WA_FLT_EPSILON  1e-5f
+#define WA_DBL_EPSILON  1e-9
+
 #endif /* #ifndef _BH_PLATFORM_H */