diff options
Diffstat (limited to 'libgcc/config/rs6000/sfp-machine.h')
| -rw-r--r-- | libgcc/config/rs6000/sfp-machine.h | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/libgcc/config/rs6000/sfp-machine.h b/libgcc/config/rs6000/sfp-machine.h index 75d5e1a2d52..ab028fe4211 100644 --- a/libgcc/config/rs6000/sfp-machine.h +++ b/libgcc/config/rs6000/sfp-machine.h @@ -130,10 +130,14 @@ void __sfp_handle_exceptions (int); if (__builtin_expect (_fex, 0)) \ __sfp_handle_exceptions (_fex); \ } while (0); -/* A set bit indicates an exception is masked and a clear bit indicates it is - trapping. */ -# define FP_TRAPPING_EXCEPTIONS (~_fpscr & (FP_EX_ALL >> 22)) +/* The FP_EX_* bits track whether the exception has occurred. This macro + must set the FP_EX_* bits of those exceptions which are configured to + trap. The FPSCR bit which indicates this is 22 ISA bits above the + respective FP_EX_* bit. Note, the ISA labels bits from msb to lsb, + so 22 ISA bits above is 22 bits below when counted from the lsb. */ +# define FP_TRAPPING_EXCEPTIONS ((_fpscr.i << 22) & FP_EX_ALL) + # define FP_RND_NEAREST 0x0 # define FP_RND_ZERO 0x1 # define FP_RND_PINF 0x2 @@ -141,16 +145,16 @@ void __sfp_handle_exceptions (int); # define FP_RND_MASK 0x3 # define _FP_DECL_EX \ - unsigned long long _fpscr __attribute__ ((unused)) = FP_RND_NEAREST - + union { unsigned long long i; double d; } _fpscr __attribute__ ((unused)) = \ + { .i = FP_RND_NEAREST } + #define FP_INIT_ROUNDMODE \ do { \ - __asm__ __volatile__ ("mtfsf 255, %0" \ - : \ - : "f" (_fpscr)); \ + __asm__ __volatile__ ("mffs %0" \ + : "=f" (_fpscr.d)); \ } while (0) -# define FP_ROUNDMODE (_fpscr & FP_RND_MASK) +# define FP_ROUNDMODE (_fpscr.i & FP_RND_MASK) #endif /* !__FLOAT128__ */ /* Define ALIASNAME as a strong alias for NAME. */ |