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authorJoseph Myers <joseph@codesourcery.com>2013-10-18 21:03:40 +0000
committerJoseph Myers <joseph@codesourcery.com>2013-10-18 21:04:22 +0000
commit3c8325fb47c3688cc7d9b70ada2ec71fb0eb219a (patch)
treeeb315c426bd9c1f5aa42f40f6e9e74f2d7aabcd3 /sysdeps/powerpc/soft-fp
parent289528850de3c197821e0b670b23980ff8b4d538 (diff)
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Add e500 port.
Diffstat (limited to 'sysdeps/powerpc/soft-fp')
-rw-r--r--sysdeps/powerpc/soft-fp/sfp-machine.h64
1 files changed, 55 insertions, 9 deletions
diff --git a/sysdeps/powerpc/soft-fp/sfp-machine.h b/sysdeps/powerpc/soft-fp/sfp-machine.h
index 508d8698d4..0411878071 100644
--- a/sysdeps/powerpc/soft-fp/sfp-machine.h
+++ b/sysdeps/powerpc/soft-fp/sfp-machine.h
@@ -41,18 +41,64 @@
R##_c = FP_CLS_NAN; \
} while (0)
+#if defined __NO_FPRS__ && !defined _SOFT_FLOAT
+
+/* Exception flags. We use the bit positions of the appropriate bits
+ in the FPEFSCR. */
+
+# include <fenv_libc.h>
+# include <sysdep.h>
+# include <sys/prctl.h>
+
+int __feraiseexcept_soft (int);
+libc_hidden_proto (__feraiseexcept_soft)
+
+# define FP_EX_INEXACT SPEFSCR_FINXS
+# define FP_EX_INVALID SPEFSCR_FINVS
+# define FP_EX_DIVZERO SPEFSCR_FDBZS
+# define FP_EX_UNDERFLOW SPEFSCR_FUNFS
+# define FP_EX_OVERFLOW SPEFSCR_FOVFS
+
+# define _FP_DECL_EX \
+ int _spefscr __attribute__ ((unused)), _ftrapex __attribute__ ((unused)) = 0
+# define FP_INIT_ROUNDMODE \
+ do \
+ { \
+ int _r; \
+ INTERNAL_SYSCALL_DECL (_err); \
+ \
+ _spefscr = fegetenv_register (); \
+ _r = INTERNAL_SYSCALL (prctl, _err, 2, PR_GET_FPEXC, &_ftrapex); \
+ if (INTERNAL_SYSCALL_ERROR_P (_r, _err)) \
+ _ftrapex = 0; \
+ } \
+ while (0)
+# define FP_INIT_EXCEPTIONS /* Empty. */
+
+# define FP_HANDLE_EXCEPTIONS __feraiseexcept_soft (_fex)
+# define FP_ROUNDMODE (_spefscr & 0x3)
+
+/* Not correct in general, but sufficient for the uses in soft-fp. */
+# define FP_TRAPPING_EXCEPTIONS (_ftrapex & PR_FP_EXC_UND \
+ ? FP_EX_UNDERFLOW \
+ : 0)
+
+#else
+
/* Exception flags. We use the bit positions of the appropriate bits
in the FPSCR, which also correspond to the FE_* bits. This makes
everything easier ;-). */
-#define FP_EX_INVALID (1 << (31 - 2))
-#define FP_EX_OVERFLOW (1 << (31 - 3))
-#define FP_EX_UNDERFLOW (1 << (31 - 4))
-#define FP_EX_DIVZERO (1 << (31 - 5))
-#define FP_EX_INEXACT (1 << (31 - 6))
-
-#define FP_HANDLE_EXCEPTIONS __simulate_exceptions (_fex)
-#define FP_ROUNDMODE __sim_round_mode
-#define FP_TRAPPING_EXCEPTIONS (~__sim_disabled_exceptions & 0x3e000000)
+# define FP_EX_INVALID (1 << (31 - 2))
+# define FP_EX_OVERFLOW (1 << (31 - 3))
+# define FP_EX_UNDERFLOW (1 << (31 - 4))
+# define FP_EX_DIVZERO (1 << (31 - 5))
+# define FP_EX_INEXACT (1 << (31 - 6))
+
+# define FP_HANDLE_EXCEPTIONS __simulate_exceptions (_fex)
+# define FP_ROUNDMODE __sim_round_mode
+# define FP_TRAPPING_EXCEPTIONS (~__sim_disabled_exceptions & 0x3e000000)
+
+#endif
/* FIXME: these variables should be thread specific (see bugzilla bug
15483) and ideally preserved across signal handlers, like hardware