diff options
Diffstat (limited to 'toolchain/uClibc/uClibc-0.9.30.3-xtensa-013-atomic.h.patch')
| -rw-r--r-- | toolchain/uClibc/uClibc-0.9.30.3-xtensa-013-atomic.h.patch | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/toolchain/uClibc/uClibc-0.9.30.3-xtensa-013-atomic.h.patch b/toolchain/uClibc/uClibc-0.9.30.3-xtensa-013-atomic.h.patch new file mode 100644 index 000000000..fd2037111 --- /dev/null +++ b/toolchain/uClibc/uClibc-0.9.30.3-xtensa-013-atomic.h.patch @@ -0,0 +1,165 @@ +--- /dev/null 2008-09-18 06:50:54.356228028 -0700 ++++ uClibc-0.9.29/libc/sysdeps/linux/xtensa/bits/atomic.h 2008-10-04 11:40:21.000000000 -0700 +@@ -0,0 +1,162 @@ ++/* ++ * Copyright (C) 2008 Tensilica, Inc. ++ * Contributed by Joe Taylor <joe@tensilica.com> 2008 ++ * ++ * This file is subject to the terms and conditions of the GNU Lesser General ++ * Public License. See the file "COPYING.LIB" in the main directory of this ++ * archive for more details. ++ */ ++ ++#ifndef _XTENSA_BITS_ATOMIC_H ++#define _XTENSA_BITS_ATOMIC_H 1 ++ ++/* Xtensa has only a 32-bit form of a store-conditional instruction, ++ so just stub out the rest. */ ++ ++/* Atomically store NEWVAL in *MEM if *MEM is equal to OLDVAL. ++ Return the old *MEM value. */ ++ ++#define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \ ++ ({__typeof__(*(mem)) __tmp, __value; \ ++ __asm__ __volatile__( \ ++ "1: l32i %1, %2, 0 \n" \ ++ " bne %1, %4, 2f \n" \ ++ " wsr %1, SCOMPARE1 \n" \ ++ " mov %0, %1 \n" \ ++ " mov %1, %3 \n" \ ++ " s32c1i %1, %2, 0 \n" \ ++ " bne %0, %1, 1b \n" \ ++ "2: \n" \ ++ : "=&a" (__value), "=&a" (__tmp) \ ++ : "a" (mem), "a" (newval), "a" (oldval) \ ++ : "memory" ); \ ++ __tmp; \ ++ }) ++ ++/* Atomically store NEWVAL in *MEM if *MEM is equal to OLDVAL. ++ Return zero if *MEM was changed or non-zero if no exchange happened. */ ++ ++#define __arch_compare_and_exchange_bool_32_acq(mem, newval, oldval) \ ++ ({__typeof__(*(mem)) __tmp, __value; \ ++ __asm__ __volatile__( \ ++ "1: l32i %0, %2, 0 \n" \ ++ " sub %1, %4, %0 \n" \ ++ " bnez %1, 2f \n" \ ++ " wsr %0, SCOMPARE1 \n" \ ++ " mov %1, %3 \n" \ ++ " s32c1i %1, %2, 0 \n" \ ++ " bne %0, %1, 1b \n" \ ++ " movi %1, 0 \n" \ ++ "2: \n" \ ++ : "=&a" (__value), "=&a" (__tmp) \ ++ : "a" (mem), "a" (newval), "a" (oldval) \ ++ : "memory" ); \ ++ __tmp != 0; \ ++ }) ++ ++/* Store NEWVALUE in *MEM and return the old value. */ ++ ++#define __arch_exchange_32_acq(mem, newval) \ ++ ({__typeof__(*(mem)) __tmp, __value; \ ++ __asm__ __volatile__( \ ++ "1: l32i %0, %2, 0 \n" \ ++ " wsr %0, SCOMPARE1 \n" \ ++ " mov %1, %3 \n" \ ++ " s32c1i %1, %2, 0 \n" \ ++ " bne %0, %1, 1b \n" \ ++ : "=&a" (__value), "=&a" (__tmp) \ ++ : "a" (mem), "a" (newval) \ ++ : "memory" ); \ ++ __tmp; \ ++ }) ++ ++/* Add VALUE to *MEM and return the old value of *MEM. */ ++ ++#define __arch_atomic_exchange_and_add_32(mem, value) \ ++ ({__typeof__(*(mem)) __tmp, __value; \ ++ __asm__ __volatile__( \ ++ "1: l32i %0, %2, 0 \n" \ ++ " wsr %0, SCOMPARE1 \n" \ ++ " add %1, %0, %3 \n" \ ++ " s32c1i %1, %2, 0 \n" \ ++ " bne %0, %1, 1b \n" \ ++ : "=&a" (__value), "=&a" (__tmp) \ ++ : "a" (mem), "a" (value) \ ++ : "memory" ); \ ++ __tmp; \ ++ }) ++ ++/* Subtract VALUE from *MEM and return the old value of *MEM. */ ++ ++#define __arch_atomic_exchange_and_sub_32(mem, value) \ ++ ({__typeof__(*(mem)) __tmp, __value; \ ++ __asm__ __volatile__( \ ++ "1: l32i %0, %2, 0 \n" \ ++ " wsr %0, SCOMPARE1 \n" \ ++ " sub %1, %0, %3 \n" \ ++ " s32c1i %1, %2, 0 \n" \ ++ " bne %0, %1, 1b \n" \ ++ : "=&a" (__value), "=&a" (__tmp) \ ++ : "a" (mem), "a" (value) \ ++ : "memory" ); \ ++ __tmp; \ ++ }) ++ ++/* Decrement *MEM if it is > 0, and return the old value. */ ++ ++#define __arch_atomic_decrement_if_positive_32(mem) \ ++ ({__typeof__(*(mem)) __tmp, __value; \ ++ __asm__ __volatile__( \ ++ "1: l32i %0, %2, 0 \n" \ ++ " blti %0, 1, 2f \n" \ ++ " wsr %0, SCOMPARE1 \n" \ ++ " addi %1, %0, -1 \n" \ ++ " s32c1i %1, %2, 0 \n" \ ++ " bne %0, %1, 1b \n" \ ++ "2: \n" \ ++ : "=&a" (__value), "=&a" (__tmp) \ ++ : "a" (mem) \ ++ : "memory" ); \ ++ __tmp; \ ++ }) ++ ++ ++/* These are the preferred public interfaces: */ ++ ++#define atomic_compare_and_exchange_val_acq(mem, newval, oldval) \ ++ ({ \ ++ if (sizeof (*mem) != 4) \ ++ abort(); \ ++ __arch_compare_and_exchange_val_32_acq(mem, newval, oldval); \ ++ }) ++ ++#define atomic_exchange_acq(mem, newval) \ ++ ({ \ ++ if (sizeof(*(mem)) != 4) \ ++ abort(); \ ++ __arch_exchange_32_acq(mem, newval); \ ++ }) ++ ++#define atomic_exchange_and_add(mem, newval) \ ++ ({ \ ++ if (sizeof(*(mem)) != 4) \ ++ abort(); \ ++ __arch_atomic_exchange_and_add_32(mem, newval); \ ++ }) ++ ++#define atomic_exchange_and_sub(mem, newval) \ ++ ({ \ ++ if (sizeof(*(mem)) != 4) \ ++ abort(); \ ++ __arch_atomic_exchange_and_sub_32(mem, newval); \ ++ }) ++ ++#define atomic_decrement_if_positive(mem) \ ++ ({ \ ++ if (sizeof(*(mem)) != 4) \ ++ abort(); \ ++ __arch_atomic_decrement_if_positive_32(mem); \ ++ }) ++ ++#endif /* _XTENSA_BITS_ATOMIC_H */ ++ |