Hello!
Following aarch64 example, we can define FP_TRAPPING_EXCEPTIONS for x86, too.
2012-12-05 Uros Bizjak <ubiz...@gmail.com>
* config/i386/sfp-machine.h (FP_EX_ALL): Define.
(FP_TRAPPING_EXCEPTIONS): Define.
* config/i386/32/sfp-machine.h (FP_EX_SHIFT): Define.
* config/i386/64/sfp-machine.h (FP_EX_SHIFT): Ditto.
Tested on x86_64-pc-linux-gnu {,-m32}.
If there are no objections, I will commit this patch to mainline SVN tomorrow.
Uros.
Index: config/i386/32/sfp-machine.h
===================================================================
--- config/i386/32/sfp-machine.h (revision 194182)
+++ config/i386/32/sfp-machine.h (working copy)
@@ -78,6 +78,11 @@
#define _FP_NANFRAC_Q _FP_QNANBIT_Q, 0, 0, 0
#ifndef _SOFT_FLOAT
+#define FP_EX_SHIFT 0
+
+#define _FP_DECL_EX \
+ unsigned short _fcw __attribute__ ((unused)) = FP_RND_NEAREST;
+
#define FP_RND_NEAREST 0
#define FP_RND_ZERO 0xc00
#define FP_RND_PINF 0x800
@@ -85,9 +90,6 @@
#define FP_RND_MASK 0xc00
-#define _FP_DECL_EX \
- unsigned short _fcw __attribute__ ((unused)) = FP_RND_NEAREST;
-
#define FP_INIT_ROUNDMODE \
do { \
__asm__ __volatile__ ("fnstcw\t%0" : "=m" (_fcw)); \
Index: config/i386/sfp-machine.h
===================================================================
--- config/i386/sfp-machine.h (revision 194182)
+++ config/i386/sfp-machine.h (working copy)
@@ -47,6 +47,9 @@
#define FP_EX_OVERFLOW 0x08
#define FP_EX_UNDERFLOW 0x10
#define FP_EX_INEXACT 0x20
+#define FP_EX_ALL \
+ (FP_EX_INVALID | FP_EX_DENORM | FP_EX_DIVZERO | FP_EX_OVERFLOW \
+ | FP_EX_UNDERFLOW | FP_EX_INEXACT)
void __sfp_handle_exceptions (int);
@@ -56,6 +59,8 @@
__sfp_handle_exceptions (_fex); \
} while (0);
+#define FP_TRAPPING_EXCEPTIONS ((_fcw >> FP_EX_SHIFT) & FP_EX_ALL)
+
#define FP_ROUNDMODE (_fcw & FP_RND_MASK)
#endif
Index: config/i386/64/sfp-machine.h
===================================================================
--- config/i386/64/sfp-machine.h (revision 194182)
+++ config/i386/64/sfp-machine.h (working copy)
@@ -19,6 +19,11 @@
#define _FP_NANFRAC_Q _FP_QNANBIT_Q, 0
#ifndef _SOFT_FLOAT
+#define FP_EX_SHIFT 7
+
+#define _FP_DECL_EX \
+ unsigned int _fcw __attribute__ ((unused)) = FP_RND_NEAREST;
+
#define FP_RND_NEAREST 0
#define FP_RND_ZERO 0x6000
#define FP_RND_PINF 0x4000
@@ -26,9 +31,6 @@
#define FP_RND_MASK 0x6000
-#define _FP_DECL_EX \
- unsigned int _fcw __attribute__ ((unused)) = FP_RND_NEAREST;
-
#define FP_INIT_ROUNDMODE \
do { \
__asm__ __volatile__ ("%vstmxcsr\t%0" : "=m" (_fcw)); \
