[cmucl-commit] [git] CMU Common Lisp branch master updated. snapshot-2014-06-97-g6635ef2

[Raymond Toy]

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- Log -----------------------------------------------------------------
commit 6635ef21befd5126c23140d4be12db874577e24c
Author: Raymond Toy <toy.raymond at gmail.com>
Date:   Tue Aug 5 08:42:36 2014 -0700

    Simplify SSE2-FLOATING-POINT-MODES vop by removing an unneeded
    temp. The setter is also simplified slightly by possibly removing an
    unnecessary move.

diff --git a/src/compiler/x86/float-sse2.lisp b/src/compiler/x86/float-sse2.lisp
index e7b1b86..76bcc31 100644
--- a/src/compiler/x86/float-sse2.lisp
+++ b/src/compiler/x86/float-sse2.lisp
@@ -1331,17 +1331,15 @@
 ;; Returns exactly the mxcsr register, except the masks are flipped
 ;; because we want exception enable flags, not masks.
 (define-vop (sse2-floating-point-modes)
-  (:results (res :scs (unsigned-reg)))
+  (:results (result :scs (unsigned-reg)))
   (:result-types unsigned-num)
   (:translate sse2-floating-point-modes)
   (:policy :fast-safe)
-  (:temporary (:sc unsigned-stack) cw-stack)
-  (:temporary (:sc unsigned-reg) temp)
-  (:generator 8
-    (inst stmxcsr cw-stack)
-    (inst mov temp cw-stack)
-    (inst xor temp (ash #x3f 7))
-    (inst mov res temp)))
+  (:temporary (:sc unsigned-stack) temp)
+  (:generator 3
+    (inst stmxcsr temp)
+    (inst mov result temp)
+    (inst xor result (ash #x3f 7))))
 
 ;; Set mxcsr exactly to whatever is given, except we invert the
 ;; exception enable flags to make them match the exception mask flags.
@@ -1362,7 +1360,7 @@
     (inst xor temp (ash #x3f 7))	; Convert enables to masks
     (inst mov cw-stack temp)
     (inst ldmxcsr cw-stack)
-    (inst mov res new)))
+    (move res new)))
 
 ;; For the record here is the format of the x87 control and status
 ;; words:

-----------------------------------------------------------------------

Summary of changes:
 src/compiler/x86/float-sse2.lisp |   16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)


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