don't stack-allocate specialized vectors on non-conservtive control stacks

[sbcl.git] / src / compiler / x86 / float.lisp

diff --git a/src/compiler/x86/float.lisp b/src/compiler/x86/float.lisp
index 03963ce..0d20e7f 100644 (file)
--- a/src/compiler/x86/float.lisp
+++ b/src/compiler/x86/float.lisp
@@ -1821,6 +1821,22 @@
            (with-empty-tn@fp-top(res)
               (inst fld bits))))))))
 
+(define-vop (make-single-float-c)
+  (:results (res :scs (single-reg single-stack)))
+  (:arg-types (:constant (signed-byte 32)))
+  (:result-types single-float)
+  (:info bits)
+  (:translate make-single-float)
+  (:policy :fast-safe)
+  (:vop-var vop)
+  (:generator 2
+    (sc-case res
+      (single-stack
+       (inst mov res bits))
+      (single-reg
+       (with-empty-tn@fp-top (res)
+         (inst fld (register-inline-constant :dword bits)))))))
+
 (define-vop (make-double-float)
   (:args (hi-bits :scs (signed-reg))
          (lo-bits :scs (unsigned-reg)))
@@ -1839,6 +1855,19 @@
         (inst fldd (make-ea :dword :base ebp-tn
                             :disp (frame-byte-offset (1+ offset))))))))
 
+(define-vop (make-double-float-c)
+  (:results (res :scs (double-reg)))
+  (:arg-types (:constant (signed-byte 32)) (:constant (unsigned-byte 32)))
+  (:result-types double-float)
+  (:info hi lo)
+  (:translate make-double-float)
+  (:policy :fast-safe)
+  (:vop-var vop)
+  (:generator 1
+    (with-empty-tn@fp-top(res)
+      (inst fldd (register-inline-constant
+                  :double-float-bits (logior (ash hi 32) lo))))))
+
 #!+long-float
 (define-vop (make-long-float)
   (:args (exp-bits :scs (signed-reg))