Workaround llvm.powi.* intrinsics not available on win32 (#5538)

RX14 · web-flow · commit f8b35d14fe11 · 2018-01-04T21:13:04.000Z
diff --git a/src/float.cr b/src/float.cr
@@ -132,7 +132,11 @@ struct Float32
   end
 
   def **(other : Int32)
-    LibM.powi_f32(self, other)
+    {% if flag?(:win32) %}
+      self ** other.to_f32
+    {% else %}
+      LibM.powi_f32(self, other)
+    {% end %}
   end
 
   def **(other : Float32)
@@ -191,7 +195,11 @@ struct Float64
   end
 
   def **(other : Int32)
-    LibM.powi_f64(self, other)
+    {% if flag?(:win32) %}
+      self ** other.to_f64
+    {% else %}
+      LibM.powi_f64(self, other)
+    {% end %}
   end
 
   def **(other : Float64)
diff --git a/src/math/libm.cr b/src/math/libm.cr
@@ -37,8 +37,10 @@ lib LibM
   fun max_f64 = "llvm.maxnum.f64"(value1 : Float64, value2 : Float64) : Float64
   fun pow_f32 = "llvm.pow.f32"(value : Float32, power : Float32) : Float32
   fun pow_f64 = "llvm.pow.f64"(value : Float64, power : Float64) : Float64
-  fun powi_f32 = "llvm.powi.f32"(value : Float32, power : Int32) : Float32
-  fun powi_f64 = "llvm.powi.f64"(value : Float64, power : Int32) : Float64
+  {% unless flag?(:win32) %}
+    fun powi_f32 = "llvm.powi.f32"(value : Float32, power : Int32) : Float32
+    fun powi_f64 = "llvm.powi.f64"(value : Float64, power : Int32) : Float64
+  {% end %}
   fun round_f32 = "llvm.round.f32"(value : Float32) : Float32
   fun round_f64 = "llvm.round.f64"(value : Float64) : Float64
   fun sin_f32 = "llvm.sin.f32"(value : Float32) : Float32
