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FDR unflip the domain mask

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The domain mask was being flipped, then unfliped, while never using the
flipped state. This patch remove this unecessary flipping.

Signed-off-by: Yoan Picchi <yoan.picchi@arm.com>
This commit is contained in:
Yoan Picchi 2024-07-22 16:14:00 +00:00
parent b312112e87
commit b9cf63503e
1 changed files with 16 additions and 18 deletions
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34
src/fdr/fdr.c
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@ -143,11 +143,10 @@ m128 getInitState(const struct FDR *fdr, u8 len_history, const u64a *ft,
static really_inline
void get_conf_stride_1(const u8 *itPtr, UNUSED const u8 *start_ptr,
UNUSED const u8 *end_ptr, u32 domain_mask_flipped,
UNUSED const u8 *end_ptr, uint16_t domain_mask,
const u64a *ft, u64a *conf0, u64a *conf8, m128 *s) {
/* +1: the zones ensure that we can read the byte at z->end */
assert(itPtr >= start_ptr && itPtr + ITER_BYTES <= end_ptr);
u64a domain_mask = ~domain_mask_flipped;
u64a it_hi = *(const u64a *)itPtr;
u64a it_lo = *(const u64a *)(itPtr + 8);
@ -212,24 +211,24 @@ void get_conf_stride_1(const u8 *itPtr, UNUSED const u8 *start_ptr,
static really_inline
void get_conf_stride_2(const u8 *itPtr, UNUSED const u8 *start_ptr,
UNUSED const u8 *end_ptr, u32 domain_mask_flipped,
UNUSED const u8 *end_ptr, uint16_t domain_mask,
const u64a *ft, u64a *conf0, u64a *conf8, m128 *s) {
assert(itPtr >= start_ptr && itPtr + ITER_BYTES <= end_ptr);
u64a reach0 = andn(domain_mask_flipped, itPtr);
u64a reach2 = andn(domain_mask_flipped, itPtr + 2);
u64a reach4 = andn(domain_mask_flipped, itPtr + 4);
u64a reach6 = andn(domain_mask_flipped, itPtr + 6);
u64a reach0 = domain_mask & *(itPtr);
u64a reach2 = domain_mask & *(itPtr + 2);
u64a reach4 = domain_mask & *(itPtr + 4);
u64a reach6 = domain_mask & *(itPtr + 6);
m128 st0 = load_m128_from_u64a(ft + reach0);
m128 st2 = load_m128_from_u64a(ft + reach2);
m128 st4 = load_m128_from_u64a(ft + reach4);
m128 st6 = load_m128_from_u64a(ft + reach6);
u64a reach8 = andn(domain_mask_flipped, itPtr + 8);
u64a reach10 = andn(domain_mask_flipped, itPtr + 10);
u64a reach12 = andn(domain_mask_flipped, itPtr + 12);
u64a reach14 = andn(domain_mask_flipped, itPtr + 14);
u64a reach8 = domain_mask & *(itPtr + 8);
u64a reach10 = domain_mask & *(itPtr + 10);
u64a reach12 = domain_mask & *(itPtr + 12);
u64a reach14 = domain_mask & *(itPtr + 14);
m128 st8 = load_m128_from_u64a(ft + reach8);
m128 st10 = load_m128_from_u64a(ft + reach10);
@ -265,14 +264,14 @@ void get_conf_stride_2(const u8 *itPtr, UNUSED const u8 *start_ptr,
static really_inline
void get_conf_stride_4(const u8 *itPtr, UNUSED const u8 *start_ptr,
UNUSED const u8 *end_ptr, u32 domain_mask_flipped,
UNUSED const u8 *end_ptr, uint16_t domain_mask,
const u64a *ft, u64a *conf0, u64a *conf8, m128 *s) {
assert(itPtr >= start_ptr && itPtr + ITER_BYTES <= end_ptr);
u64a reach0 = andn(domain_mask_flipped, itPtr);
u64a reach4 = andn(domain_mask_flipped, itPtr + 4);
u64a reach8 = andn(domain_mask_flipped, itPtr + 8);
u64a reach12 = andn(domain_mask_flipped, itPtr + 12);
u64a reach0 = domain_mask & *(itPtr);
u64a reach4 = domain_mask & *(itPtr + 4);
u64a reach8 = domain_mask & *(itPtr + 8);
u64a reach12 = domain_mask & *(itPtr + 12);
m128 st0 = load_m128_from_u64a(ft + reach0);
m128 st4 = load_m128_from_u64a(ft + reach4);
@ -683,7 +682,7 @@ size_t prepareZones(const u8 *buf, size_t len, const u8 *hend,
__builtin_prefetch(itPtr + ITER_BYTES); \
u64a conf0; \
u64a conf8; \
get_conf_fn(itPtr, start_ptr, end_ptr, domain_mask_flipped, \
get_conf_fn(itPtr, start_ptr, end_ptr, fdr->domainMask, \
ft, &conf0, &conf8, &s); \
do_confirm_fdr(&conf0, 0, &control, confBase, a, itPtr, \
&last_match_id, zz); \
@ -703,7 +702,6 @@ hwlm_error_t fdr_engine_exec(const struct FDR *fdr,
u32 floodBackoff = FLOOD_BACKOFF_START;
u32 last_match_id = INVALID_MATCH_ID;
u32 domain_mask_flipped = ~fdr->domainMask;
u8 stride = fdr->stride;
const u64a *ft =
(const u64a *)((const u8 *)fdr + ROUNDUP_CL(sizeof(struct FDR)));