bastring.h (class basic_string:Rep): Encode xlock opcode as .bytes instead of mnemonics.

Wed Jun  2 00:21:54 1999  Robert Lipe  <robertlipe@usa.net>
        * std/bastring.h (class basic_string:Rep): Encode xlock opcode
        as .bytes instead of mnemonics.

From-SVN: r27295

diff --git a/libstdc++/ChangeLog b/libstdc++/ChangeLog
index 8dd6c35bfd474fe3358330ddc0dfd39b465ea685..b3d8a3224721a6a037cd733089498f5d16714444 100644 (file)
--- a/libstdc++/ChangeLog
+++ b/libstdc++/ChangeLog
@@ -1,3 +1,8 @@
+Wed Jun  2 00:21:54 1999  Robert Lipe  <robertlipe@usa.net>
+
+       * std/bastring.h (class basic_string:Rep): Encode xlock opcode
+       as .bytes instead of mnemonics.
+
 1999-05-20  Angela Marie Thomas <angela@cygnus.com>
 
        * configure.in: Test for ${compiler_name}.exe as well.

diff --git a/libstdc++/std/bastring.h b/libstdc++/std/bastring.h
index 6206713b6c9c59f7d99733d4be3422ebd58078aa..70891262e9650192dc4322954bfbac80a73ee1ed 100644 (file)
--- a/libstdc++/std/bastring.h
+++ b/libstdc++/std/bastring.h
@@ -77,8 +77,15 @@ private:
     void release ()
       {
        size_t __val;
-       asm ("lock; xaddl %0, %2"
-            : "=r" (__val) : "0" (-1), "m" (ref) : "memory");
+       // This opcode exists as a .byte instead of as a mnemonic for the
+       // benefit of SCO OpenServer 5.  The system assembler (which is 
+       // essentially required on this target) can't assemble xaddl in 
+       //COFF mode.
+       asm (".byte 0xf0, 0x0f, 0xc1, 0x02" // lock; xaddl %eax, (%edx)
+           : "=a" (__val)
+           : "0" (-1), "m" (ref), "d" (&ref)
+           : "memory");
+
        if (__val == 1)
          delete this;
       }