diff options
Diffstat (limited to 'sysdeps/i386')
| -rw-r--r-- | sysdeps/i386/fpu/Makefile | 3 | ||||
| -rw-r--r-- | sysdeps/i386/fpu/fedisblxcpt.c | 18 | ||||
| -rw-r--r-- | sysdeps/i386/fpu/feenablxcpt.c | 21 | ||||
| -rw-r--r-- | sysdeps/i386/fpu/feholdexcpt.c | 19 | ||||
| -rw-r--r-- | sysdeps/i386/fpu/fesetround.c | 16 |
5 files changed, 72 insertions, 5 deletions
diff --git a/sysdeps/i386/fpu/Makefile b/sysdeps/i386/fpu/Makefile new file mode 100644 index 0000000000..1309b64c13 --- /dev/null +++ b/sysdeps/i386/fpu/Makefile @@ -0,0 +1,3 @@ +ifeq ($(subdir),math) +$(objpfx)libm.so: $(elfobjdir)/ld.so +endif diff --git a/sysdeps/i386/fpu/fedisblxcpt.c b/sysdeps/i386/fpu/fedisblxcpt.c index c7f76f53a9..754d20d4c8 100644 --- a/sysdeps/i386/fpu/fedisblxcpt.c +++ b/sysdeps/i386/fpu/fedisblxcpt.c @@ -1,5 +1,5 @@ /* Disable floating-point exceptions. - Copyright (C) 1999, 2000 Free Software Foundation, Inc. + Copyright (C) 1999, 2000, 2003 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Andreas Jaeger <aj@suse.de>, 1999. @@ -19,6 +19,9 @@ 02111-1307 USA. */ #include <fenv.h> +#include <unistd.h> +#include <ldsodefs.h> +#include <dl-procinfo.h> int fedisableexcept (int excepts) @@ -35,5 +38,18 @@ fedisableexcept (int excepts) new_exc |= excepts; __asm__ ("fldcw %0" : : "m" (*&new_exc)); + /* If the CPU supports SSE we set the MXCSR as well. */ + if ((GL(dl_hwcap_mask) & HWCAP_I386_XMM) != 0) + { + unsigned int xnew_exc; + + /* Get the current control word. */ + __asm__ ("stmxcsr %0" : "=m" (*&xnew_exc)); + + xnew_exc |= excepts; + + __asm__ ("ldmxcsr %0" : : "m" (*&xnew_exc)); + } + return old_exc; } diff --git a/sysdeps/i386/fpu/feenablxcpt.c b/sysdeps/i386/fpu/feenablxcpt.c index a672d0e821..65a0a2944c 100644 --- a/sysdeps/i386/fpu/feenablxcpt.c +++ b/sysdeps/i386/fpu/feenablxcpt.c @@ -1,5 +1,5 @@ /* Enable floating-point exceptions. - Copyright (C) 1999, 2000 Free Software Foundation, Inc. + Copyright (C) 1999, 2000, 2003 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Andreas Jaeger <aj@suse.de>, 1999. @@ -19,11 +19,15 @@ 02111-1307 USA. */ #include <fenv.h> +#include <unistd.h> +#include <ldsodefs.h> +#include <dl-procinfo.h> int feenableexcept (int excepts) { - unsigned short int new_exc, old_exc; + unsigned short int new_exc; + unsigned short int old_exc; /* Get the current control word. */ __asm__ ("fstcw %0" : "=m" (*&new_exc)); @@ -34,5 +38,18 @@ feenableexcept (int excepts) new_exc &= ~excepts; __asm__ ("fldcw %0" : : "m" (*&new_exc)); + /* If the CPU supports SSE we set the MXCSR as well. */ + if ((GL(dl_hwcap_mask) & HWCAP_I386_XMM) != 0) + { + unsigned int xnew_exc; + + /* Get the current control word. */ + __asm__ ("ldmxcsr %0" : "=m" (*&xnew_exc)); + + xnew_exc &= ~excepts; + + __asm__ ("stmxcsr %0" : : "m" (*&xnew_exc)); + } + return old_exc; } diff --git a/sysdeps/i386/fpu/feholdexcpt.c b/sysdeps/i386/fpu/feholdexcpt.c index b68ffa3244..bdbf9107e6 100644 --- a/sysdeps/i386/fpu/feholdexcpt.c +++ b/sysdeps/i386/fpu/feholdexcpt.c @@ -1,5 +1,5 @@ /* Store current floating-point environment and clear exceptions. - Copyright (C) 1997, 1999 Free Software Foundation, Inc. + Copyright (C) 1997, 1999, 2003 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. @@ -19,6 +19,9 @@ 02111-1307 USA. */ #include <fenv.h> +#include <unistd.h> +#include <ldsodefs.h> +#include <dl-procinfo.h> int feholdexcept (fenv_t *envp) @@ -32,5 +35,19 @@ feholdexcept (fenv_t *envp) work = envp->__control_word | 0x3f; __asm__ ("fldcw %0" : : "m" (*&work)); + /* If the CPU supports SSE we set the MXCSR as well. */ + if ((GL(dl_hwcap_mask) & HWCAP_I386_XMM) != 0) + { + unsigned int xwork; + + /* Get the current control word. */ + __asm__ ("stmxcsr %0" : "=m" (*&xwork)); + + /* Set all exceptions to non-stop. */ + work |= 0x1f80; + + __asm__ ("ldmxcsr %0" : : "m" (*&xwork)); + } + return 0; } diff --git a/sysdeps/i386/fpu/fesetround.c b/sysdeps/i386/fpu/fesetround.c index 342ae49c60..342ed42318 100644 --- a/sysdeps/i386/fpu/fesetround.c +++ b/sysdeps/i386/fpu/fesetround.c @@ -1,5 +1,5 @@ /* Set current rounding direction. - Copyright (C) 1997 Free Software Foundation, Inc. + Copyright (C) 1997, 2003 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. @@ -19,6 +19,9 @@ 02111-1307 USA. */ #include <fenv.h> +#include <unistd.h> +#include <ldsodefs.h> +#include <dl-procinfo.h> int fesetround (int round) @@ -34,5 +37,16 @@ fesetround (int round) cw |= round; __asm__ ("fldcw %0" : : "m" (*&cw)); + /* If the CPU supports SSE we set the MXCSR as well. */ + if ((GL(dl_hwcap_mask) & HWCAP_I386_XMM) != 0) + { + unsigned int xcw; + + __asm__ ("stmxcsr %0" : "=m" (*&xcw)); + cw &= ~0x6000; + cw |= round << 3; + __asm__ ("ldmxcsr %0" : : "m" (*&xcw)); + } + return 0; } |