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exec: introduce qemu_xxhash{2,4,5,6,7}

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Before moving them all to include/qemu/xxhash.h.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Emilio G. Cota 2018-10-20 18:46:28 -04:00 committed by Richard Henderson
parent e132fde25f
commit c971d8fa73
4 changed files with 39 additions and 18 deletions
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41
include/exec/tb-hash-xx.h
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@ -42,23 +42,23 @@
#define PRIME32_4 668265263U
#define PRIME32_5 374761393U
#define TB_HASH_XX_SEED 1
#define QEMU_XXHASH_SEED 1
/*
* xxhash32, customized for input variables that are not guaranteed to be
* contiguous in memory.
*/
static inline uint32_t
tb_hash_func7(uint64_t a0, uint64_t b0, uint32_t e, uint32_t f, uint32_t g)
qemu_xxhash7(uint64_t ab, uint64_t cd, uint32_t e, uint32_t f, uint32_t g)
{
uint32_t v1 = TB_HASH_XX_SEED + PRIME32_1 + PRIME32_2;
uint32_t v2 = TB_HASH_XX_SEED + PRIME32_2;
uint32_t v3 = TB_HASH_XX_SEED + 0;
uint32_t v4 = TB_HASH_XX_SEED - PRIME32_1;
uint32_t a = a0 >> 32;
uint32_t b = a0;
uint32_t c = b0 >> 32;
uint32_t d = b0;
uint32_t v1 = QEMU_XXHASH_SEED + PRIME32_1 + PRIME32_2;
uint32_t v2 = QEMU_XXHASH_SEED + PRIME32_2;
uint32_t v3 = QEMU_XXHASH_SEED + 0;
uint32_t v4 = QEMU_XXHASH_SEED - PRIME32_1;
uint32_t a = ab >> 32;
uint32_t b = ab;
uint32_t c = cd >> 32;
uint32_t d = cd;
uint32_t h32;
v1 += a * PRIME32_2;
@ -98,4 +98,25 @@ tb_hash_func7(uint64_t a0, uint64_t b0, uint32_t e, uint32_t f, uint32_t g)
return h32;
}
static inline uint32_t qemu_xxhash2(uint64_t ab)
{
return qemu_xxhash7(ab, 0, 0, 0, 0);
}
static inline uint32_t qemu_xxhash4(uint64_t ab, uint64_t cd)
{
return qemu_xxhash7(ab, cd, 0, 0, 0);
}
static inline uint32_t qemu_xxhash5(uint64_t ab, uint64_t cd, uint32_t e)
{
return qemu_xxhash7(ab, cd, e, 0, 0);
}
static inline uint32_t qemu_xxhash6(uint64_t ab, uint64_t cd, uint32_t e,
uint32_t f)
{
return qemu_xxhash7(ab, cd, e, f, 0);
}
#endif /* EXEC_TB_HASH_XX_H */

2
include/exec/tb-hash.h
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@ -61,7 +61,7 @@ static inline
uint32_t tb_hash_func(tb_page_addr_t phys_pc, target_ulong pc, uint32_t flags,
uint32_t cf_mask, uint32_t trace_vcpu_dstate)
{
return tb_hash_func7(phys_pc, pc, flags, cf_mask, trace_vcpu_dstate);
return qemu_xxhash7(phys_pc, pc, flags, cf_mask, trace_vcpu_dstate);
}
#endif

2
tests/qht-bench.c
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@ -105,7 +105,7 @@ static bool is_equal(const void *ap, const void *bp)
static uint32_t h(unsigned long v)
{
return tb_hash_func7(v, 0, 0, 0, 0);
return qemu_xxhash2(v);
}
static uint32_t hval(unsigned long v)

12
util/qsp.c
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@ -135,13 +135,13 @@ QemuCondWaitFunc qemu_cond_wait_func = qemu_cond_wait_impl;
* without it we still get a pretty unique hash.
*/
static inline
uint32_t do_qsp_callsite_hash(const QSPCallSite *callsite, uint64_t a)
uint32_t do_qsp_callsite_hash(const QSPCallSite *callsite, uint64_t ab)
{
uint64_t b = (uint64_t)(uintptr_t)callsite->obj;
uint64_t cd = (uint64_t)(uintptr_t)callsite->obj;
uint32_t e = callsite->line;
uint32_t f = callsite->type;
return tb_hash_func7(a, b, e, f, 0);
return qemu_xxhash6(ab, cd, e, f);
}
static inline
@ -169,11 +169,11 @@ static uint32_t qsp_entry_no_thread_hash(const QSPEntry *entry)
static uint32_t qsp_entry_no_thread_obj_hash(const QSPEntry *entry)
{
const QSPCallSite *callsite = entry->callsite;
uint64_t a = g_str_hash(callsite->file);
uint64_t b = callsite->line;
uint64_t ab = g_str_hash(callsite->file);
uint64_t cd = callsite->line;
uint32_t e = callsite->type;
return tb_hash_func7(a, b, e, 0, 0);
return qemu_xxhash5(ab, cd, e);
}
static bool qsp_callsite_cmp(const void *ap, const void *bp)