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unwinding memcpy to 4x byte assignments

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This commit is contained in:
grynca 2018-09-05 19:35:16 +02:00
parent 0101b3a0a7
commit 9ee9dca307
2 changed files with 14 additions and 2 deletions
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8
nuklear.h
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@ -7158,6 +7158,7 @@ nk_murmur_hash(const void * key, int len, nk_hash seed)
nk_uint k1;
const nk_byte *data = (const nk_byte*)key;
const nk_byte *keyptr = data;
nk_byte *k1ptr;
const int bsize = sizeof(k1);
const int nblocks = len/4;
@ -7169,7 +7170,12 @@ nk_murmur_hash(const void * key, int len, nk_hash seed)
/* body */
if (!key) return 0;
for (i = 0; i < nblocks; ++i, keyptr += bsize) {
memcpy(&k1, keyptr, bsize);
k1ptr = (nk_byte*)&k1;
k1ptr[0] = keyptr[0];
k1ptr[1] = keyptr[1];
k1ptr[2] = keyptr[2];
k1ptr[3] = keyptr[3];
k1 *= c1;
k1 = NK_ROTL(k1,15);
k1 *= c2;

8
src/nuklear_util.c
View File

@ -919,6 +919,7 @@ nk_murmur_hash(const void * key, int len, nk_hash seed)
nk_uint k1;
const nk_byte *data = (const nk_byte*)key;
const nk_byte *keyptr = data;
nk_byte *k1ptr;
const int bsize = sizeof(k1);
const int nblocks = len/4;
@ -930,7 +931,12 @@ nk_murmur_hash(const void * key, int len, nk_hash seed)
/* body */
if (!key) return 0;
for (i = 0; i < nblocks; ++i, keyptr += bsize) {
memcpy(&k1, keyptr, bsize);
k1ptr = (nk_byte*)&k1;
k1ptr[0] = keyptr[0];
k1ptr[1] = keyptr[1];
k1ptr[2] = keyptr[2];
k1ptr[3] = keyptr[3];
k1 *= c1;
k1 = NK_ROTL(k1,15);
k1 *= c2;