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* sysdeps/x86_64/fpu/fesetenv.c (fesetenv): Fix setting of default 

mode.
	* sysdeps/x86_64/fpu/fsetexcptflg.c (fesetexceptflag): Do not
	clear whole mxcsr but only exceptions.
This commit is contained in:
Andreas Jaeger 2003-02-21 16:18:50 +00:00
parent 59fed0e26d
commit 2e58582091
2 changed files with 10 additions and 11 deletions
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17
sysdeps/x86_64/fpu/fesetenv.c
View File

@ -1,5 +1,5 @@
/* Install given floating-point environment. /* Install given floating-point environment.
Copyright (C) 2001, 2002 Free Software Foundation, Inc. Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library. This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or The GNU C Library is free software; you can redistribute it and/or
@ -45,10 +45,9 @@ fesetenv (const fenv_t *envp)
temp.__data_selector = 0; temp.__data_selector = 0;
/* Set mask for SSE MXCSR. */ /* Set mask for SSE MXCSR. */
temp.__mxcsr |= (FE_ALL_EXCEPT << 7); temp.__mxcsr |= (FE_ALL_EXCEPT << 7);
/* Set rounding to FE_TOWARDZERO. */ /* Set rounding to FE_TONEAREST. */
temp.__mxcsr &= ~(FE_TOWARDZERO << 3); temp.__mxcsr &= ~ 0x6000;
/* Disable exceptions. */ temp.__mxcsr |= (FE_TONEAREST << 3);
temp.__mxcsr &= ~FE_ALL_EXCEPT;
} }
else if (envp == FE_NOMASK_ENV) else if (envp == FE_NOMASK_ENV)
{ {
@ -60,11 +59,11 @@ fesetenv (const fenv_t *envp)
temp.__data_offset = 0; temp.__data_offset = 0;
temp.__data_selector = 0; temp.__data_selector = 0;
/* Set mask for SSE MXCSR. */ /* Set mask for SSE MXCSR. */
/* Set rounding to FE_TONEAREST. */
temp.__mxcsr &= ~ 0x6000;
temp.__mxcsr |= (FE_TONEAREST << 3);
/* Do not mask exceptions. */
temp.__mxcsr &= ~(FE_ALL_EXCEPT << 7); temp.__mxcsr &= ~(FE_ALL_EXCEPT << 7);
/* Set rounding to FE_TOWARDZERO. */
temp.__mxcsr &= ~(FE_TOWARDZERO << 3);
/* Disable exceptions. */
temp.__mxcsr &= ~FE_ALL_EXCEPT;
} }
else else
{ {

4
sysdeps/x86_64/fpu/fsetexcptflg.c
View File

@ -1,5 +1,5 @@
/* Set floating-point environment exception handling. /* Set floating-point environment exception handling.
Copyright (C) 2001 Free Software Foundation, Inc. Copyright (C) 2001, 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library. This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or The GNU C Library is free software; you can redistribute it and/or
@ -44,7 +44,7 @@ fesetexceptflag (const fexcept_t *flagp, int excepts)
/* And now the same for SSE. */ /* And now the same for SSE. */
__asm__ ("stmxcsr %0" : "=m" (*&mxcsr)); __asm__ ("stmxcsr %0" : "=m" (*&mxcsr));
mxcsr &= (excepts & FE_ALL_EXCEPT); mxcsr &= ~(excepts & FE_ALL_EXCEPT);
mxcsr |= *flagp & excepts & FE_ALL_EXCEPT; mxcsr |= *flagp & excepts & FE_ALL_EXCEPT;
__asm__ ("ldmxcsr %0" : : "m" (*&mxcsr)); __asm__ ("ldmxcsr %0" : : "m" (*&mxcsr));