X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fx86%2Fvm.lisp;h=3af49f211876837007bec409c78052b2c4def9b8;hb=da8cb4801a3ab35070f380e22aea3d260f9df8aa;hp=1b080bc28f7fe15c012b2f977a4fd6dd6ece5412;hpb=fb2d70782a537348895f6a04f257d1f1fcc7942d;p=sbcl.git

diff --git a/src/compiler/x86/vm.lisp b/src/compiler/x86/vm.lisp
index 1b080bc..3af49f2 100644
--- a/src/compiler/x86/vm.lisp
+++ b/src/compiler/x86/vm.lisp
@@ -404,6 +404,20 @@
                (eql value (log 2l0 10l0))
                (eql value (log 2l0 2.718281828459045235360287471352662L0)))
        (sc-number-or-lose 'fp-constant)))))
+
+;; For an immediate TN, return its value encoded for use as a literal.
+;; For any other TN, return the TN.  Only works for FIXNUMs,
+;; STATIC-SYMBOLs, and CHARACTERS (FLOATs and SAPs are handled
+;; elsewhere).
+(defun encode-value-if-immediate (tn)
+  (if (sc-is tn immediate)
+      (let ((val (tn-value tn)))
+        (etypecase val
+          (integer (fixnumize val))
+          (symbol (+ nil-value (static-symbol-offset val)))
+          (character (logior (ash (char-code val) n-widetag-bits)
+                             character-widetag))))
+      tn))
 
 ;;;; miscellaneous function call parameters