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authorSteve Ellcey <sellcey@mips.com>2013-09-23 09:58:30 -0700
committerSteve Ellcey <sellcey@mips.com>2013-09-23 09:58:30 -0700
commitc79fb0ed652b62eef9b42442cfc22bbc9c1e56bf (patch)
treec514e8cf3bc69e7c420df075c49d68cd528e5f3b
parentd93fa6592bd2c400f3e924bd3da94d049b8c5f5e (diff)
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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.
-rw-r--r--ports/ChangeLog.mips23
-rw-r--r--ports/sysdeps/mips/math_private.h108
2 files changed, 131 insertions, 0 deletions
diff --git a/ports/ChangeLog.mips b/ports/ChangeLog.mips
index 9bbf12ac7a..345449a585 100644
--- a/ports/ChangeLog.mips
+++ b/ports/ChangeLog.mips
@@ -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.
diff --git a/ports/sysdeps/mips/math_private.h b/ports/sysdeps/mips/math_private.h
index 6b99957c7b..4f029b0a6c 100644
--- a/ports/sysdeps/mips/math_private.h
+++ b/ports/sysdeps/mips/math_private.h
@@ -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