diff --git a/liba/src/ieee754.c b/liba/src/ieee754.c
index 19663e662..4e70ed982 100644
--- a/liba/src/ieee754.c
+++ b/liba/src/ieee754.c
@@ -1,37 +1,22 @@
 #include <private/ieee754.h>
+#include "external/softfloat/include/internals.h"
 
 uint32_t ieee754man32(float x) {
-  union {
-    float f;
-    uint32_t i;
-  } u;
-  u.f = x;
-  return (u.i & ((1<<23)-1));
+  uint32_t * address = (uint32_t *)&x;
+  return fracF32UI( *address );
 }
 
 uint8_t ieee754exp32(float x) {
-  union {
-    float f;
-    uint32_t i;
-  } u;
-  u.f = x;
-  return (u.i >> 23) & 0xFF;
+  uint32_t * address = (uint32_t *)&x;
+  return expF32UI( *address );
 }
 
 uint64_t ieee754man64(double x) {
-  union {
-    double d;
-    uint64_t i;
-  } u;
-  u.d = x;
-  return (u.i & (((uint64_t)1<<52)-1));
+  uint64_t * address = (uint64_t *)&x;
+  return fracF64UI( *address );
 }
 
 uint16_t ieee754exp64(double x) {
-  union {
-    double d;
-    uint64_t i;
-  } u;
-  u.d = x;
-  return (uint16_t)((u.i >> 52) & 0x7FF);
+  uint64_t * address = (uint64_t *)&x;
+  return expF64UI( *address );
 }