diff --git a/compiler-rt/lib/builtins/powitf2.c b/compiler-rt/lib/builtins/powitf2.c
--- a/compiler-rt/lib/builtins/powitf2.c
+++ b/compiler-rt/lib/builtins/powitf2.c
@@ -10,9 +10,10 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "int_lib.h"
+#define QUAD_PRECISION
+#include "fp_lib.h"
 
-#if _ARCH_PPC
+#if defined(CRT_HAS_128BIT) && defined(CRT_LDBL_128BIT)
 
 // Returns: a ^ b
 
diff --git a/compiler-rt/test/builtins/Unit/powitf2_test.c b/compiler-rt/test/builtins/Unit/powitf2_test.c
--- a/compiler-rt/test/builtins/Unit/powitf2_test.c
+++ b/compiler-rt/test/builtins/Unit/powitf2_test.c
@@ -14,7 +14,7 @@
 
 #include <stdio.h>
 
-#if _ARCH_PPC
+#if __LDBL_MANT_DIG__ == 113
 
 #include "int_lib.h"
 #include <math.h>
@@ -37,7 +37,7 @@
 
 int main()
 {
-#if _ARCH_PPC
+#if __LDBL_MANT_DIG__ == 113
     if (test__powitf2(0, 0, 1))
         return 1;
     if (test__powitf2(1, 0, 1))