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authorRoland McGrath <roland@gnu.org>1996-03-12 08:19:58 +0000
committerRoland McGrath <roland@gnu.org>1996-03-12 08:19:58 +0000
commitdd0e4e0c8bc50309bdadae2ec78c4ccf15e6c402 (patch)
tree002412f86014ce455ffbbea2bc268363cf85c997 /sysdeps/unix/sysv
parentd25d5f6a5043df3e5aee57b078a102305f0cbdad (diff)
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Tue Mar 12 03:15:02 1996 Roland McGrath <roland@charlie-brown.gnu.ai.mit.edu>
	* sysdeps/unix/sysv/linux/i386/fpu_control.h (_FPU_DEFAULT): Change
	default to double precision, all interrupts masked; fdlibm requires.
Diffstat (limited to 'sysdeps/unix/sysv')
-rw-r--r--sysdeps/unix/sysv/linux/i386/fpu_control.h15
1 files changed, 6 insertions, 9 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/fpu_control.h b/sysdeps/unix/sysv/linux/i386/fpu_control.h
index 56f42cd8e6..ed56d83943 100644
--- a/sysdeps/unix/sysv/linux/i386/fpu_control.h
+++ b/sysdeps/unix/sysv/linux/i386/fpu_control.h
@@ -63,8 +63,8 @@ Boston, MA 02111-1307, USA.  */
 #define _FPU_MASK_PM  0x20
 
 /* precision control */
-#define _FPU_EXTENDED 0x300   /* RECOMMENDED */
-#define _FPU_DOUBLE   0x200
+#define _FPU_EXTENDED 0x300
+#define _FPU_DOUBLE   0x200	/* fdlibm requires double precision */
 #define _FPU_SINGLE   0x0     /* DO NOT USE */
 
 /* rounding control */
@@ -76,16 +76,13 @@ Boston, MA 02111-1307, USA.  */
 #define _FPU_RESERVED 0xF0C0  /* Reserved bits in cw */
 
 
-/* Now two recommended cw */
+/* The fdlibm code requires strict IEEE double precision arithmetic,
+   and no interrupts for exceptions, rounding to nearest.  */
 
-/* Linux default:
-     - extended precision
-     - rounding to nearest
-     - exceptions on overflow, zero divide and NaN */
-#define _FPU_DEFAULT  0x1372
+#define _FPU_DEFAULT  0x127f
 
 /* IEEE:  same as above, but exceptions */
-#define _FPU_IEEE     0x137f
+#define _FPU_IEEE     0x127f
 
 /* Type of the control word.  */
 typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__HI__)));