X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fgeneric%2Fearly-vm.lisp;h=2a39fc354d21a6819937aea28571f4cc3de4abdf;hb=7c406887c08477181e869b1b98142d99b52990ac;hp=670e0adb8e152819408a6666a9f0600133ad5e0c;hpb=f1ffbf976aaa50b7b22f126b97e34afe06a91210;p=sbcl.git

diff --git a/src/compiler/generic/early-vm.lisp b/src/compiler/generic/early-vm.lisp
index 670e0ad..2a39fc3 100644
--- a/src/compiler/generic/early-vm.lisp
+++ b/src/compiler/generic/early-vm.lisp
@@ -45,3 +45,23 @@
     (ash -1 (- n-word-bits n-lowtag-bits))
   #!+sb-doc
   "the fixnum closest in value to negative infinity")
+
+(def!constant most-positive-exactly-single-float-fixnum
+  (min #xffffff most-positive-fixnum))
+(def!constant most-negative-exactly-single-float-fixnum
+  (max #x-ffffff most-negative-fixnum))
+(def!constant most-positive-exactly-double-float-fixnum
+  (min #x1fffffffffffff most-positive-fixnum))
+(def!constant most-negative-exactly-double-float-fixnum
+  (max #x-1fffffffffffff most-negative-fixnum))
+
+;;;; Point where continuous area starting at dynamic-space-start bumps into
+;;;; next space.
+#!+gencgc
+(def!constant max-dynamic-space-end
+    (let ((stop (1- (ash 1 n-word-bits)))
+          (start dynamic-space-start))
+      (dolist (other-start (list read-only-space-start static-space-start linkage-table-space-start))
+        (when (< start other-start)
+          (setf stop (min stop other-start))))
+      stop))