diff options
Diffstat (limited to 'linuxthreads/sysdeps/mips/pt-machine.h')
| -rw-r--r-- | linuxthreads/sysdeps/mips/pt-machine.h | 91 |
1 files changed, 53 insertions, 38 deletions
diff --git a/linuxthreads/sysdeps/mips/pt-machine.h b/linuxthreads/sysdeps/mips/pt-machine.h index 50765b183c..16e264017d 100644 --- a/linuxthreads/sysdeps/mips/pt-machine.h +++ b/linuxthreads/sysdeps/mips/pt-machine.h @@ -18,13 +18,10 @@ You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., - 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ - TODO: This version makes use of MIPS ISA 2 features. It won't - work on ISA 1. These machines will have to take the overhead of - a sysmips(MIPS_ATOMIC_SET, ...) syscall which isn't implemented - yet correctly. There is however a better solution for R3000 - uniprocessor machines possible. */ +#include <sgidefs.h> +#include <sys/tas.h> #ifndef PT_EI # define PT_EI extern inline @@ -35,30 +32,43 @@ /* Spinlock implementation; required. */ + +#if (_MIPS_ISA >= _MIPS_ISA_MIPS2) + PT_EI long int testandset (int *spinlock) { long int ret, temp; - __asm__ __volatile__( - "# Inline spinlock test & set\n\t" - ".set\tmips2\n" - "1:\tll\t%0,%3\n\t" - "bnez\t%0,2f\n\t" - ".set\tnoreorder\n\t" - "li\t%1,1\n\t" - ".set\treorder\n\t" - "sc\t%1,%2\n\t" - "beqz\t%1,1b\n" - "2:\t.set\tmips0\n\t" - "/* End spinlock test & set */" - : "=&r"(ret), "=&r" (temp), "=m"(*spinlock) - : "m"(*spinlock) - : "memory"); + __asm__ __volatile__ + ("/* Inline spinlock test & set */\n\t" + "1:\n\t" + "ll %0,%3\n\t" + ".set push\n\t" + ".set noreorder\n\t" + "bnez %0,2f\n\t" + " li %1,1\n\t" + ".set pop\n\t" + "sc %1,%2\n\t" + "beqz %1,1b\n" + "2:\n\t" + "/* End spinlock test & set */" + : "=&r" (ret), "=&r" (temp), "=m" (*spinlock) + : "m" (*spinlock) + : "memory"); return ret; } +#else /* !(_MIPS_ISA >= _MIPS_ISA_MIPS2) */ + +PT_EI long int +testandset (int *spinlock) +{ + return _test_and_set (spinlock, 1); +} +#endif /* !(_MIPS_ISA >= _MIPS_ISA_MIPS2) */ + /* Get some notion of the current stack. Need not be exactly the top of the stack, just something somewhere in the current frame. */ @@ -68,27 +78,32 @@ register char * stack_pointer __asm__ ("$29"); /* Compare-and-swap for semaphores. */ +#if (_MIPS_ISA >= _MIPS_ISA_MIPS2) + #define HAS_COMPARE_AND_SWAP PT_EI int __compare_and_swap (long int *p, long int oldval, long int newval) { - long ret; - - __asm__ __volatile__ ( - "/* Inline compare & swap */\n\t" - ".set\tmips2\n" - "1:\tll\t%0,%4\n\t" - ".set\tnoreorder\n\t" - "bne\t%0,%2,2f\n\t" - "move\t%0,%3\n\t" - ".set\treorder\n\t" - "sc\t%0,%1\n\t" - "beqz\t%0,1b\n" - "2:\t.set\tmips0\n\t" - "/* End compare & swap */" - : "=&r"(ret), "=m"(*p) - : "r"(oldval), "r"(newval), "m"(*p) - : "memory"); + long int ret; + + __asm__ __volatile__ + ("/* Inline compare & swap */\n\t" + "1:\n\t" + "ll %0,%4\n\t" + ".set push\n" + ".set noreorder\n\t" + "bne %0,%2,2f\n\t" + " move %0,%3\n\t" + ".set pop\n\t" + "sc %0,%1\n\t" + "beqz %0,1b\n" + "2:\n\t" + "/* End compare & swap */" + : "=&r" (ret), "=m" (*p) + : "r" (oldval), "r" (newval), "m" (*p) + : "memory"); return ret; } + +#endif /* (_MIPS_ISA >= _MIPS_ISA_MIPS2) */ |