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| author | Richard Henderson <richard.henderson@linaro.org> | 2023-05-18 08:22:51 -0700 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2023-05-23 16:51:18 -0700 |
| commit | 412db3d5b54ff4577f02aad7918c85d1b9ee7ab3 (patch) | |
| tree | 034bee2a49a3cb869ee5a69fa2c90c19e5af7395 /include/qemu | |
| parent | 0dd0c7fa2055d5f95413b510386753bb00d61202 (diff) | |
| download | qemu-412db3d5b54ff4577f02aad7918c85d1b9ee7ab3.zip qemu-412db3d5b54ff4577f02aad7918c85d1b9ee7ab3.tar.gz qemu-412db3d5b54ff4577f02aad7918c85d1b9ee7ab3.tar.bz2 | |
include/host: Split out atomic128-cas.h
Separates the aarch64-specific portion into its own file.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'include/qemu')
| -rw-r--r-- | include/qemu/atomic128.h | 55 |
1 files changed, 1 insertions, 54 deletions
diff --git a/include/qemu/atomic128.h b/include/qemu/atomic128.h index d0ba0b9..10a2322 100644 --- a/include/qemu/atomic128.h +++ b/include/qemu/atomic128.h @@ -41,60 +41,7 @@ * Therefore, special case each platform. */ -#if defined(CONFIG_ATOMIC128) -static inline Int128 atomic16_cmpxchg(Int128 *ptr, Int128 cmp, Int128 new) -{ - Int128Alias r, c, n; - - c.s = cmp; - n.s = new; - r.i = qatomic_cmpxchg__nocheck((__int128_t *)ptr, c.i, n.i); - return r.s; -} -# define HAVE_CMPXCHG128 1 -#elif defined(CONFIG_CMPXCHG128) -static inline Int128 atomic16_cmpxchg(Int128 *ptr, Int128 cmp, Int128 new) -{ - Int128Alias r, c, n; - - c.s = cmp; - n.s = new; - r.i = __sync_val_compare_and_swap_16((__int128_t *)ptr, c.i, n.i); - return r.s; -} -# define HAVE_CMPXCHG128 1 -#elif defined(__aarch64__) -/* Through gcc 8, aarch64 has no support for 128-bit at all. */ -static inline Int128 atomic16_cmpxchg(Int128 *ptr, Int128 cmp, Int128 new) -{ - uint64_t cmpl = int128_getlo(cmp), cmph = int128_gethi(cmp); - uint64_t newl = int128_getlo(new), newh = int128_gethi(new); - uint64_t oldl, oldh; - uint32_t tmp; - - asm("0: ldaxp %[oldl], %[oldh], %[mem]\n\t" - "cmp %[oldl], %[cmpl]\n\t" - "ccmp %[oldh], %[cmph], #0, eq\n\t" - "b.ne 1f\n\t" - "stlxp %w[tmp], %[newl], %[newh], %[mem]\n\t" - "cbnz %w[tmp], 0b\n" - "1:" - : [mem] "+m"(*ptr), [tmp] "=&r"(tmp), - [oldl] "=&r"(oldl), [oldh] "=&r"(oldh) - : [cmpl] "r"(cmpl), [cmph] "r"(cmph), - [newl] "r"(newl), [newh] "r"(newh) - : "memory", "cc"); - - return int128_make128(oldl, oldh); -} -# define HAVE_CMPXCHG128 1 -#else -/* Fallback definition that must be optimized away, or error. */ -Int128 QEMU_ERROR("unsupported atomic") - atomic16_cmpxchg(Int128 *ptr, Int128 cmp, Int128 new); -# define HAVE_CMPXCHG128 0 -#endif /* Some definition for HAVE_CMPXCHG128 */ - +#include "host/atomic128-cas.h" #if defined(CONFIG_ATOMIC128) static inline Int128 atomic16_read(Int128 *ptr) |