diff options
Diffstat (limited to 'sysdeps/sparc/sparc32/soft-fp')
| -rw-r--r-- | sysdeps/sparc/sparc32/soft-fp/q_util.c | 49 | ||||
| -rw-r--r-- | sysdeps/sparc/sparc32/soft-fp/sfp-machine.h | 16 |
2 files changed, 27 insertions, 38 deletions
diff --git a/sysdeps/sparc/sparc32/soft-fp/q_util.c b/sysdeps/sparc/sparc32/soft-fp/q_util.c index 22f70ba467..c4efc10bf8 100644 --- a/sysdeps/sparc/sparc32/soft-fp/q_util.c +++ b/sysdeps/sparc/sparc32/soft-fp/q_util.c @@ -1,7 +1,7 @@ /* Software floating-point emulation. Helper routine for _Q_* routines. Simulate exceptions using double arithmetics. - Copyright (C) 1999 Free Software Foundation, Inc. + Copyright (C) 1999, 2012 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Jakub Jelinek (jj@ultra.linux.cz). @@ -21,36 +21,23 @@ #include "soft-fp.h" -unsigned long long ___Q_numbers [] = { -0x0000000000000000ULL, /* Zero */ -0x0010100000000000ULL, /* Very tiny number */ -0x0010000000000000ULL, /* Minimum normalized number */ -0x7fef000000000000ULL, /* A huge double number */ -}; +unsigned long long ___Q_zero = 0x0000000000000000ULL; -double ___Q_simulate_exceptions(int exceptions) +void ___Q_simulate_exceptions(int exceptions) { - double d, *p = (double *)___Q_numbers; - if (exceptions & FP_EX_INVALID) - d = p[0]/p[0]; - if (exceptions & FP_EX_OVERFLOW) - { - d = p[3] + p[3]; - exceptions &= ~FP_EX_INEXACT; - } - if (exceptions & FP_EX_UNDERFLOW) - { - if (exceptions & FP_EX_INEXACT) - { - d = p[2] * p[2]; - exceptions &= ~FP_EX_INEXACT; - } - else - d = p[1] - p[2]; - } - if (exceptions & FP_EX_DIVZERO) - d = 1.0/p[0]; - if (exceptions & FP_EX_INEXACT) - d = p[3] - p[2]; - return d; + fpu_control_t fcw; + int tem, ou; + + _FPU_GETCW(fcw); + + tem = (fcw >> 23) & 0x1f; + + ou = exceptions & (FP_EX_OVERFLOW | FP_EX_UNDERFLOW); + if (ou & tem) + exceptions &= ~FP_EX_INVALID; + + fcw &= ~0x1f; + fcw |= (exceptions | (exceptions << 5)); + + _FPU_SETCW(fcw); } diff --git a/sysdeps/sparc/sparc32/soft-fp/sfp-machine.h b/sysdeps/sparc/sparc32/soft-fp/sfp-machine.h index 8cdc7c2677..4314082f70 100644 --- a/sysdeps/sparc/sparc32/soft-fp/sfp-machine.h +++ b/sysdeps/sparc/sparc32/soft-fp/sfp-machine.h @@ -184,15 +184,18 @@ #define FP_EX_DIVZERO (1 << 1) #define FP_EX_INEXACT (1 << 0) -#define _FP_DECL_EX fpu_control_t _fcw +#define _FP_DECL_EX \ + fpu_control_t _fcw __attribute__ ((unused)) = (FP_RND_NEAREST << 30) #define FP_INIT_ROUNDMODE \ do { \ _FPU_GETCW(_fcw); \ } while (0) +#define FP_INHIBIT_RESULTS ((_fcw >> 23) & _fex) + /* Simulate exceptions using double arithmetics. */ -extern double ___Q_simulate_exceptions(int exc); +extern void ___Q_simulate_exceptions(int exc); #define FP_HANDLE_EXCEPTIONS \ do { \ @@ -201,11 +204,10 @@ do { \ /* This is the common case, so we do it inline. \ * We need to clear cexc bits if any. \ */ \ - extern unsigned long long ___Q_numbers[]; \ - __asm__ __volatile__("\ - ldd [%0], %%f30\n\ - faddd %%f30, %%f30, %%f30\ - " : : "r" (___Q_numbers) : "f30"); \ + extern unsigned long long ___Q_zero; \ + __asm__ __volatile__("ldd [%0], %%f30\n\t" \ + "faddd %%f30, %%f30, %%f30" \ + : : "r" (&___Q_zero) : "f30"); \ } \ else \ ___Q_simulate_exceptions (_fex); \ |