summaryrefslogtreecommitdiff
path: root/libc/sysdeps/linux/e1/bits/fenvinline.h
diff options
context:
space:
mode:
Diffstat (limited to 'libc/sysdeps/linux/e1/bits/fenvinline.h')
-rw-r--r--libc/sysdeps/linux/e1/bits/fenvinline.h297
1 files changed, 0 insertions, 297 deletions
diff --git a/libc/sysdeps/linux/e1/bits/fenvinline.h b/libc/sysdeps/linux/e1/bits/fenvinline.h
deleted file mode 100644
index 21d258cda..000000000
--- a/libc/sysdeps/linux/e1/bits/fenvinline.h
+++ /dev/null
@@ -1,297 +0,0 @@
-/*
- Inline floating-point environment handling functions for Hyperstone e1-32X.
- Copyright (C) 2002-2003, George Thanos <george.thanos@gdt.gr>
- Yannis Mitsos <yannis.mitsos@gdt.gr>
-
- Copyright (C) 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
-
-#if defined __GNUC__ && !defined _SOFT_FLOAT && !defined __NO_MATH_INLINES
-
-/**********************************************************
- * --- A small description of the E1-16/32X FP unit. ---
- * FP exceptions can be enabled and disabled through
- * <feenableexcept>, <fedisableexcept>.
- *
- * - When an enabled exception takes place a SIGFPE signal
- * is sent to the process by the exception handler. User
- * can test for the exception that took place through
- * <fetestexcept>.
- * feraiseexcept works only for accrued exceptions.
- *
- * - When a disabld exception takes place it does not generate
- * a trap. The user can check if any exception took place after
- * an FP instruction by issuing an <fetestexcept> command.
- * User should first clear the G2 register by issuing an
- * <feclearexcept> function.
- * The following program is a typical example of how the user
- * should check for exceptions that did not generate a SIGFPE
- * signal :
- * {
- * double f;
- * int raised;
- * feclearexcept (FE_ALL_EXCEPT);
- * f = compute ();
- * raised = fetestexcept (FE_OVERFLOW | FE_INVALID);
- * if (raised & FE_OVERFLOW) { ... }
- * if (raised & FE_INVALID) { ... }
- * ...
- * }
- ***********************************************************/
-
-/* Get FPU rounding mode */
-#define fegetround() \
-({ \
- unsigned int tmp; \
- __asm__ __volatile__("mov %0, SR" \
- :"=l"(tmp) \
- :/*no input*/); \
- tmp &= (3<<13); \
- (tmp); \
-})
-
-/* Set FPU rounding mode */
-#define fesetround(round) \
-({ \
- unsigned int tmp = (3 << 13); \
- while(1) { \
- /* Clear SR.FRM field */ \
- __asm__ __volatile__("andn SR, %0" \
- :/*no output*/ \
- :"l"(tmp) ); \
- tmp &= round; \
- \
- if(tmp) { \
- tmp = -1; \
- break; \
- } \
- \
- __asm__ __volatile__("or SR, %0" \
- :/*no input*/ \
- :"l"(round) ); \
- tmp = 0; \
- break; \
- } \
- (tmp); \
-})
-
-/* The following functions test for accrued exceptions.
- * No trap is generated on an FP exception.
- */
-static __inline__ feclearexcept(int __excepts)
-{
- unsigned int enabled_excepts, disabled_excepts;
-
- /* Check that __excepts is correctly set */
- if( __excepts & (~0x1F00) )
- return -1;
-
- __asm__ __volatile__("mov %0, SR"
- :"=l"(enabled_excepts)
- :/*no input*/ );
-
- enabled_excepts &= 0x1F00;
- disabled_excepts = ~enabled_excepts;
- disabled_excepts &= 0x1F00;
-
- enabled_excepts &= __excepts;
- disabled_excepts &= __excepts;
-
- /* Clear accrued exceptions */
- __asm__ __volatile__("andn G2, %0\n\t"
- "andn G2, %1\n\t"
- :/*no output*/
- :"l"(enabled_excepts),
- "l"(disabled_excepts >> 8) );
- return 0;
-}
-
-/* fetestexcepts tests both for actual and accrued
- * excepts. You can test for an exception either after
- * an FP instruction or within a SIGFPE handler
- */
-__inline__ int fetestexcept(int __excepts)
-{
- unsigned int G2, G2en, G2dis;
- unsigned int enabled_excepts, disabled_excepts;
-
- /* Check that __excepts is correctly set */
- if( __excepts & (~0x1F00) )
- return -1;
-
- __asm__ __volatile__("mov %0, SR"
- :"=l"(enabled_excepts)
- :/*no input*/ );
-
- enabled_excepts &= 0x1F00;
- disabled_excepts = ~enabled_excepts;
- disabled_excepts &= 0x1F00;
-
- __asm__ __volatile__("mov %0, G2"
- :"=l"(G2)
- :/*no input*/ );
-
- G2en = G2 & 0x1F00;
- G2dis = G2 & 0x1F;
- G2en &= enabled_excepts;
- G2dis &= (disabled_excepts >> 8);
- return ( G2en | (G2dis << 8) );
-}
-
-static __inline__ int feraiseexcept(int __excepts)
-{
- __asm__ __volatile__("or G2, %0"
- :/*no output*/
- :"l"( __excepts >> 8 ) );
- return 0;
-}
-
-/* The following functions enable/disable individual exceptions.
- * If enabling an exception trap is going to occur, in case of error.
- */
-#define feenableexcept(__excepts) \
-({ \
- int __retval, __pexcepts; \
- int __tmpexcepts = __excepts; \
- \
- while(1) { \
- __asm__ __volatile__("mov %0, SR" \
- :"=l"(__pexcepts) \
- :/*no input*/ ); \
- __pexcepts &= 0x1F00; \
- \
-/* Check if __except values are valid */ \
- if( __tmpexcepts & ~0x1F00 ) { \
- __retval = -1; \
- fprintf(stderr,"Non valid excepts\n");\
- break; \
- } \
- \
- __asm__ __volatile__("or SR, %0" \
- :/*no output*/ \
- :"l"(__tmpexcepts) ); \
- __retval = __pexcepts; \
- break; \
- } \
- (__retval); \
-})
-
-
-#define fedisableexcept(__excepts) \
-({ \
- int __retval, __pexcepts; \
- int __tmpexcepts = __excepts; \
- \
- while(1) { \
- __asm__ __volatile__("mov %0, SR" \
- :"=l"(__pexcepts) \
- :/*no input*/ ); \
- __pexcepts &= 0x1F00; \
- \
-/* Check if __except values are valid */ \
- if( __tmpexcepts & ~0x1F00 ) { \
- __retval = -1; \
- fprintf(stderr,"Non valid excepts\n");\
- break; \
- } \
- \
- __asm__ __volatile__("andn SR, %0" \
- :/*no output*/ \
- :"l"(__tmpexcepts) ); \
- __retval = __pexcepts; \
- break; \
- } \
- (__retval); \
-})
-
-static __inline__ int fegetexcept(int excepts)
-{
- unsigned int tmp;
- __asm__ __volatile__("mov %0, SR"
- :"=l"(tmp)
- :/*no input*/ );
- tmp &= 0x1F00;
- return tmp;
-}
-
-static __inline__ int fegetenv(fenv_t *envp)
-{
- __asm__ __volatile__("mov %0, SR\n\t
- mov %1, SR\n\t
- mov %2, G2\n\t
- mov %3, G2\n\t"
- :"=l"(envp->round_mode),
- "=l"(envp->trap_enabled),
- "=l"(envp->accrued_except),
- "=l"(envp->actual_except)
- :/*no input*/ );
- envp->round_mode &= (3<<13);
- envp->trap_enabled &= 0x1F00;
- envp->accrued_except &= 0x1F;
- envp->accrued_except <<= 8;
- envp->actual_except &= 0x1F00;
-}
-
-#define feholdexcept(envp) \
-( \
- fegetenv(envp); \
- fedisableexcept(FE_ALL_EXCEPT); \
- feclearexcept(FE_ALL_EXCEPT); \
- (0); \
-)
-
-#define fesetenv(envp) \
-({ \
- /* Clear FRM & FTE field of SR */ \
- unsigned long clearSR = ( 127<<8 ); \
- __asm__ __volatile__("andn SR, %0\n\t" \
- "or SR, %1\n\t" \
- "or SR, %2\n\t" \
- :/*no output*/ \
- :"l"(clearSR), \
- "l"(envp->round_mode), \
- "l"(envp->trap_enabled) ); \
- __asm__ __volatile__("andn G2, 0x1F1F\n\t" \
- "or G2, %0\n\t" \
- "or G2, %1\n\t" \
- :/*no output*/ \
- :"l"( envp->accrued_except >> 8),\
- :"l"( envp->actual_except ) ); \
- (0); /* return 0 */ \
-})
-
-#define feupdateenv(envp) \
-({ \
- /* Clear FRM & FTE field of SR */ \
- __asm__ __volatile__(/* We dont clear the prev SR*/ \
- "or SR, %1\n\t" \
- "or SR, %2\n\t" \
- :/*no output*/ \
- :"l"(clearSR), \
- "l"(envp->round_mode), \
- "l"(envp->accrued_except) ); \
- __asm__ __volatile__(/* We dont clear the prev SR*/ \
- "or G2, %0\n\t" \
- "or G2, %1\n\t" \
- :/*no output*/ \
- :"l"( envp->accrued_except >> 8),\
- :"l"( envp->actual_except ) ); \
- (0); /* return 0 */ \
-})
-
-
-#endif /* __GNUC__ && !_SOFT_FLOAT */
-
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-17 09:20:09 +0000