From: simonmar <unknown>
Date: Wed, 27 Feb 2002 14:33:09 +0000 (+0000)
Subject: [project @ 2002-02-27 14:33:09 by simonmar]
X-Git-Tag: nhc98-1-18-release~1096
X-Git-Url: http://git.megacz.com/?p=ghc-base.git;a=commitdiff_plain;h=b222d0eedeb4303082df2b066a15b9028ec1ee70

[project @ 2002-02-27 14:33:09 by simonmar]
Move the Float/Double constant folding rules from GHC.Float to
GHC.Base, thus returning GHC.Float to its non-orphan status.
---

diff --git a/GHC/Base.lhs b/GHC/Base.lhs
index d5fcfcd..bafd6c3 100644
--- a/GHC/Base.lhs
+++ b/GHC/Base.lhs
@@ -1,5 +1,5 @@
 % -----------------------------------------------------------------------------
-% $Id: Base.lhs,v 1.6 2002/02/12 09:39:19 simonmar Exp $
+% $Id: Base.lhs,v 1.7 2002/02/27 14:33:09 simonmar Exp $
 %
 % (c) The University of Glasgow, 1992-2002
 %
@@ -85,7 +85,7 @@ module GHC.Base
   ) 
 	where
 
-import {-# SOURCE #-} GHC.Prim
+import GHC.Prim
 import {-# SOURCE #-} GHC.Err
 
 infixr 9  .
@@ -692,6 +692,30 @@ gtInt, geInt, eqInt, neInt, ltInt, leInt :: Int -> Int -> Bool
 "x# <=# x#" forall x#. x# <=# x# = True
   #-}
 
+{-# RULES
+"plusFloat x 0.0"   forall x#. plusFloat#  x#   0.0# = x#
+"plusFloat 0.0 x"   forall x#. plusFloat#  0.0# x#   = x#
+"minusFloat x 0.0"  forall x#. minusFloat# x#   0.0# = x#
+"minusFloat x x"    forall x#. minusFloat# x#   x#   = 0.0#
+"timesFloat x 0.0"  forall x#. timesFloat# x#   0.0# = 0.0#
+"timesFloat0.0 x"   forall x#. timesFloat# 0.0# x#   = 0.0#
+"timesFloat x 1.0"  forall x#. timesFloat# x#   1.0# = x#
+"timesFloat 1.0 x"  forall x#. timesFloat# 1.0# x#   = x#
+"divideFloat x 1.0" forall x#. divideFloat# x#  1.0# = x#
+  #-}
+
+{-# RULES
+"plusDouble x 0.0"   forall x#. (+##) x#    0.0## = x#
+"plusDouble 0.0 x"   forall x#. (+##) 0.0## x#    = x#
+"minusDouble x 0.0"  forall x#. (-##) x#    0.0## = x#
+"minusDouble x x"    forall x#. (-##) x#    x#    = 0.0##
+"timesDouble x 0.0"  forall x#. (*##) x#    0.0## = 0.0##
+"timesDouble 0.0 x"  forall x#. (*##) 0.0## x#    = 0.0##
+"timesDouble x 1.0"  forall x#. (*##) x#    1.0## = x#
+"timesDouble 1.0 x"  forall x#. (*##) 1.0## x#    = x#
+"divideDouble x 1.0" forall x#. (/##) x#    1.0## = x#
+  #-}
+
 -- Wrappers for the shift operations.  The uncheckedShift# family are
 -- undefined when the amount being shifted by is greater than the size
 -- in bits of Int#, so these wrappers perform a check and return
diff --git a/GHC/Float.lhs b/GHC/Float.lhs
index ec27a12..d16ebeb 100644
--- a/GHC/Float.lhs
+++ b/GHC/Float.lhs
@@ -1,5 +1,5 @@
 % ------------------------------------------------------------------------------
-% $Id: Float.lhs,v 1.4 2002/02/05 17:32:26 simonmar Exp $
+% $Id: Float.lhs,v 1.5 2002/02/27 14:33:09 simonmar Exp $
 %
 % (c) The University of Glasgow, 1994-2000
 %
@@ -768,18 +768,6 @@ minusFloat  (F# x) (F# y) = F# (minusFloat# x y)
 timesFloat  (F# x) (F# y) = F# (timesFloat# x y)
 divideFloat (F# x) (F# y) = F# (divideFloat# x y)
 
-{-# RULES
-"plusFloat x 0.0"   forall x#. plusFloat#  x#   0.0# = x#
-"plusFloat 0.0 x"   forall x#. plusFloat#  0.0# x#   = x#
-"minusFloat x 0.0"  forall x#. minusFloat# x#   0.0# = x#
-"minusFloat x x"    forall x#. minusFloat# x#   x#   = 0.0#
-"timesFloat x 0.0"  forall x#. timesFloat# x#   0.0# = 0.0#
-"timesFloat0.0 x"   forall x#. timesFloat# 0.0# x#   = 0.0#
-"timesFloat x 1.0"  forall x#. timesFloat# x#   1.0# = x#
-"timesFloat 1.0 x"  forall x#. timesFloat# 1.0# x#   = x#
-"divideFloat x 1.0" forall x#. divideFloat# x#  1.0# = x#
-  #-}
-
 negateFloat :: Float -> Float
 negateFloat (F# x)        = F# (negateFloat# x)
 
@@ -826,18 +814,6 @@ minusDouble  (D# x) (D# y) = D# (x -## y)
 timesDouble  (D# x) (D# y) = D# (x *## y)
 divideDouble (D# x) (D# y) = D# (x /## y)
 
-{-# RULES
-"plusDouble x 0.0"   forall x#. (+##) x#    0.0## = x#
-"plusDouble 0.0 x"   forall x#. (+##) 0.0## x#    = x#
-"minusDouble x 0.0"  forall x#. (-##) x#    0.0## = x#
-"minusDouble x x"    forall x#. (-##) x#    x#    = 0.0##
-"timesDouble x 0.0"  forall x#. (*##) x#    0.0## = 0.0##
-"timesDouble 0.0 x"  forall x#. (*##) 0.0## x#    = 0.0##
-"timesDouble x 1.0"  forall x#. (*##) x#    1.0## = x#
-"timesDouble 1.0 x"  forall x#. (*##) 1.0## x#    = x#
-"divideDouble x 1.0" forall x#. (/##) x#    1.0## = x#
-  #-}
-
 negateDouble :: Double -> Double
 negateDouble (D# x)        = D# (negateDouble# x)