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-rw-r--r--src/nxt_http_parse.c166
1 files changed, 63 insertions, 103 deletions
diff --git a/src/nxt_http_parse.c b/src/nxt_http_parse.c
index d91dd959..d0e22a77 100644
--- a/src/nxt_http_parse.c
+++ b/src/nxt_http_parse.c
@@ -6,10 +6,6 @@
#include <nxt_main.h>
-#ifdef __SSE4_2__
-#include <x86intrin.h>
-#endif
-
typedef struct {
nxt_http_field_handler_t handler;
@@ -128,47 +124,6 @@ nxt_http_parse_target(u_char **pos, u_char *end)
}
-#ifdef __SSE4_2__
-
-nxt_inline nxt_http_target_traps_e
-nxt_http_parse_target_rest(u_char **pos, u_char *end)
-{
- int n;
- u_char *p;
- nxt_uint_t i;
-
- static const u_char stop_chars[16] nxt_aligned(16) = " #\r\n";
-
- __m128i pattern = _mm_load_si128((__m128i *) stop_chars);
-
- p = *pos;
-
- for (n = (end - p) / 16; nxt_fast_path(n != 0); n--) {
-
- __m128i test = _mm_loadu_si128((__m128i *) p);
-
- i = _mm_cmpistri(pattern, test, _SIDD_LEAST_SIGNIFICANT
- | _SIDD_CMP_EQUAL_ANY
- | _SIDD_UBYTE_OPS);
-
- p += i;
-
- if (i != 16) {
- *pos = p;
- return nxt_http_target_chars[*p];
- }
- }
-
- *pos = p;
-
- return nxt_http_parse_target(pos, end);
-}
-
-#else
-#define nxt_http_parse_target_rest nxt_http_parse_target
-#endif
-
-
nxt_int_t
nxt_http_parse_request(nxt_http_request_parse_t *rp, nxt_buf_mem_t *b)
{
@@ -258,10 +213,6 @@ nxt_http_parse_request_line(nxt_http_request_parse_t *rp, u_char **pos,
/* target */
- nxt_prefetch(&nxt_http_target_chars[' ']);
- nxt_prefetch(&nxt_http_target_chars['@']);
- nxt_prefetch(&nxt_http_target_chars['`']);
-
ch = *p;
if (nxt_slow_path(ch != '/')) {
@@ -337,7 +288,7 @@ rest_of_target:
for ( ;; ) {
p++;
- trap = nxt_http_parse_target_rest(&p, end);
+ trap = nxt_http_parse_target(&p, end);
switch (trap) {
case NXT_HTTP_TARGET_SPACE:
@@ -476,44 +427,66 @@ nxt_http_parse_field_name(nxt_http_request_parse_t *rp, u_char **pos,
p = *pos;
size = end - p;
+ i = rp->offset;
- for (i = rp->offset; i != size; i++) {
+#define nxt_http_parse_field_name_step \
+ { \
+ ch = p[i]; \
+ c = normal[ch]; \
+ \
+ if (nxt_slow_path(c == '\0')) { \
+ goto name_end; \
+ } \
+ \
+ rp->field_name_key.str[i % 32] = c; \
+ i++; \
+ }
- ch = p[i];
+ while (nxt_fast_path(size - i >= 8)) {
+ nxt_http_parse_field_name_step
+ nxt_http_parse_field_name_step
+ nxt_http_parse_field_name_step
+ nxt_http_parse_field_name_step
- c = normal[ch];
+ nxt_http_parse_field_name_step
+ nxt_http_parse_field_name_step
+ nxt_http_parse_field_name_step
+ nxt_http_parse_field_name_step
+ }
- if (nxt_fast_path(c != '\0')) {
- rp->field_name_key.str[i % 32] = c;
- continue;
- }
+ while (nxt_fast_path(i != size)) {
+ nxt_http_parse_field_name_step
+ }
- if (nxt_fast_path(ch == ':')) {
- if (nxt_slow_path(i == 0)) {
- return NXT_ERROR;
- }
+#undef nxt_http_parse_field_name_step
- *pos = &p[i] + 1;
+ rp->offset = i;
+ rp->handler = &nxt_http_parse_field_name;
- rp->field_name.start = p;
- rp->field_name.length = i;
+ return NXT_AGAIN;
- rp->offset = 0;
+name_end:
- return nxt_http_parse_field_value(rp, pos, end);
+ if (nxt_fast_path(ch == ':')) {
+ if (nxt_slow_path(i == 0)) {
+ return NXT_ERROR;
}
- *pos = &p[i];
+ *pos = &p[i] + 1;
- rp->field_name.length = 0;
+ rp->field_name.start = p;
+ rp->field_name.length = i;
- return nxt_http_parse_field_end(rp, pos, end);
+ rp->offset = 0;
+
+ return nxt_http_parse_field_value(rp, pos, end);
}
- rp->offset = i;
- rp->handler = &nxt_http_parse_field_name;
+ *pos = &p[i];
- return NXT_AGAIN;
+ rp->field_name.length = 0;
+
+ return nxt_http_parse_field_end(rp, pos, end);
}
@@ -584,39 +557,27 @@ static u_char *
nxt_http_lookup_field_end(u_char *p, u_char *end)
{
nxt_uint_t n;
-#ifdef __SSE4_2__
- nxt_uint_t i;
-
- static const u_char end_chars[16] nxt_aligned(16) = "\r\n";
-
- __m128i pattern = _mm_load_si128((__m128i *) end_chars);
-
- for (n = (end - p) / 16; nxt_fast_path(n != 0); n--) {
-
- __m128i test = _mm_loadu_si128((__m128i *) p);
-
- i = _mm_cmpistri(pattern, test, _SIDD_LEAST_SIGNIFICANT
- | _SIDD_CMP_EQUAL_ANY
- | _SIDD_UBYTE_OPS);
-
- p += i;
-
- if (i != 16) {
- return p;
- }
- }
-#endif
#define nxt_http_lookup_field_end_step \
{ \
- if (nxt_slow_path(*p <= '\r')) { \
+ if (nxt_slow_path(*p < 0x10)) { \
return p; \
} \
\
p++; \
}
- for (n = (end - p) / 8; nxt_fast_path(n != 0); n--) {
+ for (n = (end - p) / 16; nxt_fast_path(n != 0); n--) {
+ nxt_http_lookup_field_end_step
+ nxt_http_lookup_field_end_step
+ nxt_http_lookup_field_end_step
+ nxt_http_lookup_field_end_step
+
+ nxt_http_lookup_field_end_step
+ nxt_http_lookup_field_end_step
+ nxt_http_lookup_field_end_step
+ nxt_http_lookup_field_end_step
+
nxt_http_lookup_field_end_step
nxt_http_lookup_field_end_step
nxt_http_lookup_field_end_step
@@ -628,15 +589,14 @@ nxt_http_lookup_field_end(u_char *p, u_char *end)
nxt_http_lookup_field_end_step
}
- switch (end - p) {
- case 7:
+ for (n = (end - p) / 4; nxt_fast_path(n != 0); n--) {
nxt_http_lookup_field_end_step
- case 6:
nxt_http_lookup_field_end_step
- case 5:
nxt_http_lookup_field_end_step
- case 4:
nxt_http_lookup_field_end_step
+ }
+
+ switch (end - p) {
case 3:
nxt_http_lookup_field_end_step
case 2:
@@ -679,8 +639,8 @@ nxt_http_parse_field_end(nxt_http_request_parse_t *rp, u_char **pos,
if (rp->field_name.length != 0) {
entry = nxt_http_fields_hash_lookup(rp->hash,
- rp->field_name_key.ui64,
- &rp->field_name);
+ rp->field_name_key.ui64,
+ &rp->field_name);
if (entry != NULL) {
rc = entry->handler(rp->ctx, &rp->field_name, &rp->field_value,
generated by cgit (git 2.34.1) at 2024-11-20 11:20:38 +0000