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2013-09-23 Steve Ellcey <sellcey@mips.com> 

* sysdeps/mips/math_private.h (libc_feholdexcept_mips): New function.
	(libc_feholdexcept): New macro.
	(libc_feholdexceptf): New macro.
	(libc_feholdexceptl): New macro.
	(libc_fesetround_mips): New function.
	(libc_fesetround): New macro.
	(libc_fesetroundf): New macro.
	(libc_fesetroundl): New macro.
	(libc_feholdexcept_setround_mips): New function.
	(libc_feholdexcept_setround): New macro.
	(libc_feholdexcept_setroundf): New macro.
	(libc_feholdexcept_setroundl): New macro.
	(libc_fesetenv_mips): New function.
	(libc_fesetenv): New macro.
	(libc_fesetenvf): New macro.
	(libc_fesetenvl): New macro.
	(libc_feupdateenv_mips): New function.
	(libc_feupdateenv): New macro.
	(libc_feupdateenvf): New macro.
	(libc_feupdateenvl): New macro.
This commit is contained in:
Steve Ellcey 2013-09-23 09:58:30 -07:00
parent d93fa6592b
commit c79fb0ed65
2 changed files with 131 additions and 0 deletions
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23
ports/ChangeLog.mips
View File

@ -1,3 +1,26 @@
2013-09-23 Steve Ellcey <sellcey@mips.com>
* sysdeps/mips/math_private.h (libc_feholdexcept_mips): New function.
(libc_feholdexcept): New macro.
(libc_feholdexceptf): New macro.
(libc_feholdexceptl): New macro.
(libc_fesetround_mips): New function.
(libc_fesetround): New macro.
(libc_fesetroundf): New macro.
(libc_fesetroundl): New macro.
(libc_feholdexcept_setround_mips): New function.
(libc_feholdexcept_setround): New macro.
(libc_feholdexcept_setroundf): New macro.
(libc_feholdexcept_setroundl): New macro.
(libc_fesetenv_mips): New function.
(libc_fesetenv): New macro.
(libc_fesetenvf): New macro.
(libc_fesetenvl): New macro.
(libc_feupdateenv_mips): New function.
(libc_feupdateenv): New macro.
(libc_feupdateenvf): New macro.
(libc_feupdateenvl): New macro.
2013-09-23 Maciej W. Rozycki <macro@codesourcery.com>
* sysdeps/mips/bits/atomic.h: Fix comment typo.

108
ports/sysdeps/mips/math_private.h
View File

@ -26,6 +26,114 @@
# define HIGH_ORDER_BIT_IS_SET_FOR_SNAN
#endif
/* Inline functions to speed up the math library implementation. The
default versions of these routines are in generic/math_private.h
and call fesetround, feholdexcept, etc. These routines use inlined
code instead. */
#ifdef __mips_hard_float
# include <fenv.h>
# include <fenv_libc.h>
# include <fpu_control.h>
static __always_inline void
libc_feholdexcept_mips (fenv_t *envp)
{
fpu_control_t cw;
/* Save the current state. */
_FPU_GETCW (cw);
envp->__fp_control_register = cw;
/* Clear all exception enable bits and flags. */
cw &= ~(_FPU_MASK_V|_FPU_MASK_Z|_FPU_MASK_O|_FPU_MASK_U|_FPU_MASK_I|FE_ALL_EXCEPT);
_FPU_SETCW (cw);
}
# define libc_feholdexcept libc_feholdexcept_mips
# define libc_feholdexceptf libc_feholdexcept_mips
# define libc_feholdexceptl libc_feholdexcept_mips
static __always_inline void
libc_fesetround_mips (int round)
{
fpu_control_t cw;
/* Get current state. */
_FPU_GETCW (cw);
/* Set rounding bits. */
cw &= ~_FPU_RC_MASK;
cw |= round;
/* Set new state. */
_FPU_SETCW (cw);
}
# define libc_fesetround libc_fesetround_mips
# define libc_fesetroundf libc_fesetround_mips
# define libc_fesetroundl libc_fesetround_mips
static __always_inline void
libc_feholdexcept_setround_mips (fenv_t *envp, int round)
{
fpu_control_t cw;
/* Save the current state. */
_FPU_GETCW (cw);
envp->__fp_control_register = cw;
/* Clear all exception enable bits and flags. */
cw &= ~(_FPU_MASK_V|_FPU_MASK_Z|_FPU_MASK_O|_FPU_MASK_U|_FPU_MASK_I|FE_ALL_EXCEPT);
/* Set rounding bits. */
cw &= ~_FPU_RC_MASK;
cw |= round;
/* Set new state. */
_FPU_SETCW (cw);
}
# define libc_feholdexcept_setround libc_feholdexcept_setround_mips
# define libc_feholdexcept_setroundf libc_feholdexcept_setround_mips
# define libc_feholdexcept_setroundl libc_feholdexcept_setround_mips
static __always_inline void
libc_fesetenv_mips (fenv_t *envp)
{
fpu_control_t cw;
/* Read current state to flush fpu pipeline. */
_FPU_GETCW (cw);
_FPU_SETCW (envp->__fp_control_register);
}
# define libc_fesetenv libc_fesetenv_mips
# define libc_fesetenvf libc_fesetenv_mips
# define libc_fesetenvl libc_fesetenv_mips
static __always_inline void
libc_feupdateenv_mips (fenv_t *envp)
{
int temp;
/* Save current exceptions. */
_FPU_GETCW (temp);
/* Set flag bits (which are accumulative), and *also* set the
cause bits. The setting of the cause bits is what actually causes
the hardware to generate the exception, if the corresponding enable
bit is set as well. */
temp &= FE_ALL_EXCEPT;
temp |= envp->__fp_control_register | (temp << CAUSE_SHIFT);
/* Set new state. */
_FPU_SETCW (temp);
}
# define libc_feupdateenv libc_feupdateenv_mips
# define libc_feupdateenvf libc_feupdateenv_mips
# define libc_feupdateenvl libc_feupdateenv_mips
#endif
#include_next <math_private.h>
#endif