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tcg: Add tcg_gen_{non}atomic_cmpxchg_i128

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This will allow targets to avoid rolling their own.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2022-11-09 00:23:44 +11:00
parent cb48f3654e
commit 123ae5683c
4 changed files with 146 additions and 0 deletions
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45
accel/tcg/atomic_common.c.inc
View file

@ -55,8 +55,53 @@ CMPXCHG_HELPER(cmpxchgq_be, uint64_t)
CMPXCHG_HELPER(cmpxchgq_le, uint64_t)
#endif
#ifdef CONFIG_CMPXCHG128
CMPXCHG_HELPER(cmpxchgo_be, Int128)
CMPXCHG_HELPER(cmpxchgo_le, Int128)
#endif
#undef CMPXCHG_HELPER
Int128 HELPER(nonatomic_cmpxchgo_be)(CPUArchState *env, target_ulong addr,
Int128 cmpv, Int128 newv, uint32_t oi)
{
#if TCG_TARGET_REG_BITS == 32
uintptr_t ra = GETPC();
Int128 oldv;
oldv = cpu_ld16_be_mmu(env, addr, oi, ra);
if (int128_eq(oldv, cmpv)) {
cpu_st16_be_mmu(env, addr, newv, oi, ra);
} else {
/* Even with comparison failure, still need a write cycle. */
probe_write(env, addr, 16, get_mmuidx(oi), ra);
}
return oldv;
#else
g_assert_not_reached();
#endif
}
Int128 HELPER(nonatomic_cmpxchgo_le)(CPUArchState *env, target_ulong addr,
Int128 cmpv, Int128 newv, uint32_t oi)
{
#if TCG_TARGET_REG_BITS == 32
uintptr_t ra = GETPC();
Int128 oldv;
oldv = cpu_ld16_le_mmu(env, addr, oi, ra);
if (int128_eq(oldv, cmpv)) {
cpu_st16_le_mmu(env, addr, newv, oi, ra);
} else {
/* Even with comparison failure, still need a write cycle. */
probe_write(env, addr, 16, get_mmuidx(oi), ra);
}
return oldv;
#else
g_assert_not_reached();
#endif
}
#define ATOMIC_HELPER(OP, TYPE) \
TYPE HELPER(glue(atomic_,OP))(CPUArchState *env, target_ulong addr, \
TYPE val, uint32_t oi) \

11
accel/tcg/tcg-runtime.h
View file

@ -55,6 +55,17 @@ DEF_HELPER_FLAGS_5(atomic_cmpxchgq_be, TCG_CALL_NO_WG,
DEF_HELPER_FLAGS_5(atomic_cmpxchgq_le, TCG_CALL_NO_WG,
i64, env, tl, i64, i64, i32)
#endif
#ifdef CONFIG_CMPXCHG128
DEF_HELPER_FLAGS_5(atomic_cmpxchgo_be, TCG_CALL_NO_WG,
i128, env, tl, i128, i128, i32)
DEF_HELPER_FLAGS_5(atomic_cmpxchgo_le, TCG_CALL_NO_WG,
i128, env, tl, i128, i128, i32)
#endif
DEF_HELPER_FLAGS_5(nonatomic_cmpxchgo_be, TCG_CALL_NO_WG,
i128, env, tl, i128, i128, i32)
DEF_HELPER_FLAGS_5(nonatomic_cmpxchgo_le, TCG_CALL_NO_WG,
i128, env, tl, i128, i128, i32)
#ifdef CONFIG_ATOMIC64
#define GEN_ATOMIC_HELPERS(NAME) \