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Diffstat (limited to 'graphics/asymptote/libatomic_ops/src/atomic_ops/sysdeps/gcc/hppa.h')
-rw-r--r-- | graphics/asymptote/libatomic_ops/src/atomic_ops/sysdeps/gcc/hppa.h | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/graphics/asymptote/libatomic_ops/src/atomic_ops/sysdeps/gcc/hppa.h b/graphics/asymptote/libatomic_ops/src/atomic_ops/sysdeps/gcc/hppa.h new file mode 100644 index 0000000000..2d0c491c3b --- /dev/null +++ b/graphics/asymptote/libatomic_ops/src/atomic_ops/sysdeps/gcc/hppa.h @@ -0,0 +1,94 @@ +/* + * Copyright (c) 2003 Hewlett-Packard Development Company, L.P. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include "../all_atomic_load_store.h" + +/* Some architecture set descriptions include special "ordered" memory */ +/* operations. As far as we can tell, no existing processors actually */ +/* require those. Nor does it appear likely that future processors */ +/* will. */ +#include "../ordered.h" + +/* GCC will not guarantee the alignment we need, use four lock words */ +/* and select the correctly aligned datum. See the glibc 2.3.2 */ +/* linuxthread port for the original implementation. */ +struct AO_pa_clearable_loc { + int data[4]; +}; + +#undef AO_TS_INITIALIZER +#define AO_TS_t struct AO_pa_clearable_loc +#define AO_TS_INITIALIZER { { 1, 1, 1, 1 } } +/* Switch meaning of set and clear, since we only have an atomic clear */ +/* instruction. */ +typedef enum {AO_PA_TS_set = 0, AO_PA_TS_clear = 1} AO_PA_TS_val; +#define AO_TS_VAL_t AO_PA_TS_val +#define AO_TS_CLEAR AO_PA_TS_clear +#define AO_TS_SET AO_PA_TS_set + +/* The hppa only has one atomic read and modify memory operation, */ +/* load and clear, so hppa spinlocks must use zero to signify that */ +/* someone is holding the lock. The address used for the ldcw */ +/* semaphore must be 16-byte aligned. */ +#define AO_ldcw(a, ret) \ + __asm__ __volatile__("ldcw 0(%2), %0" \ + : "=r" (ret), "=m" (*(a)) : "r" (a)) + +/* Because malloc only guarantees 8-byte alignment for malloc'd data, */ +/* and GCC only guarantees 8-byte alignment for stack locals, we can't */ +/* be assured of 16-byte alignment for atomic lock data even if we */ +/* specify "__attribute ((aligned(16)))" in the type declaration. So, */ +/* we use a struct containing an array of four ints for the atomic lock */ +/* type and dynamically select the 16-byte aligned int from the array */ +/* for the semaphore. */ +#define AO_PA_LDCW_ALIGNMENT 16 +#define AO_ldcw_align(addr) \ + ((volatile unsigned *)(((unsigned long)(addr) \ + + (AO_PA_LDCW_ALIGNMENT - 1)) \ + & ~(AO_PA_LDCW_ALIGNMENT - 1))) + +/* Works on PA 1.1 and PA 2.0 systems */ +AO_INLINE AO_TS_VAL_t +AO_test_and_set_full(volatile AO_TS_t * addr) +{ + volatile unsigned int ret; + volatile unsigned *a = AO_ldcw_align(addr); + + AO_ldcw(a, ret); + return (AO_TS_VAL_t)ret; +} +#define AO_HAVE_test_and_set_full + +AO_INLINE void +AO_pa_clear(volatile AO_TS_t * addr) +{ + volatile unsigned *a = AO_ldcw_align(addr); + + AO_compiler_barrier(); + *a = 1; +} +#define AO_CLEAR(addr) AO_pa_clear(addr) +#define AO_HAVE_CLEAR + +#undef AO_PA_LDCW_ALIGNMENT +#undef AO_ldcw +#undef AO_ldcw_align |