Changeset 2535Tweet

Timestamp:

Jul 16, 2008, 3:06:30 PM (15 years ago)

Author:

Sam Hocevar

Message:

• Make the asm checks for fsin/fcos and fldln2/fxch/fyl2x more robust by forcing the tested code to use register contraints.

File:

• libcaca/trunk/configure.ac (modified) (2 diffs)

libcaca/trunk/configure.ac

@@ -113 +113 @@
 
 AC_MSG_CHECKING(for fsin/fcos)
-AC_TRY_COMPILE([],[asm("fsin\n\tfcos");],
+AC_TRY_COMPILE([],[double x; asm("fsin\n\tfcos":"=t"(x):);],
  [AC_MSG_RESULT(yes)
   AC_DEFINE(HAVE_FSIN_FCOS, 1, [Define to 1 if you have the `fsin' and `fcos' operands.])],
@@ -119 +119 @@
 
 AC_MSG_CHECKING(for fldln2/fxch/fyl2x)
-AC_TRY_COMPILE([],[asm("fldln2; fldln2; fxch; fyl2x");],
+AC_TRY_COMPILE([],[double x; asm("fldln2; fldln2; fxch; fyl2x":"=t"(x):);],
  [AC_MSG_RESULT(yes)
   AC_DEFINE(HAVE_FLDLN2, 1, [Define to 1 if you have the `fldln2' and other floating points operands.])],