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Move conditional outside loop for NEON SPLIT4 implementation 

Seems to improve performance a fair bit
master
animetosho 2015-11-14 16:32:25 +10:00
parent 05057e5635
commit 643743d048
1 changed files with 29 additions and 6 deletions
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35
src/neon/gf_w16_neon.c
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@ -81,7 +81,34 @@ neon_w16_split_4_multiply_region(gf_t *gf, uint16_t *src, uint16_t *dst,
loset = vdupq_n_u8(0xf);
while (dst < d_end) {
if (xor) {
uint8x16x2_t vb;
while (dst < d_end) {
va = vld2q_u8((uint8_t*)src);
vb = vld2q_u8((uint8_t*)dst);
rl = vqtbl1q_u8(tbl_l[0], vandq_u8(va.val[0], loset));
rh = vqtbl1q_u8(tbl_h[0], vandq_u8(va.val[0], loset));
rl = veorq_u8(rl, vqtbl1q_u8(tbl_l[2], vandq_u8(va.val[1], loset)));
rh = veorq_u8(rh, vqtbl1q_u8(tbl_h[2], vandq_u8(va.val[1], loset)));
va.val[0] = vshrq_n_u8(va.val[0], 4);
va.val[1] = vshrq_n_u8(va.val[1], 4);
rl = veorq_u8(rl, vqtbl1q_u8(tbl_l[1], va.val[0]));
rh = veorq_u8(rh, vqtbl1q_u8(tbl_h[1], va.val[0]));
va.val[0] = veorq_u8(rl, vqtbl1q_u8(tbl_l[3], va.val[1]));
va.val[1] = veorq_u8(rh, vqtbl1q_u8(tbl_h[3], va.val[1]));
va.val[0] = veorq_u8(va.val[0], vb.val[0]);
va.val[1] = veorq_u8(va.val[1], vb.val[1]);
vst2q_u8((uint8_t*)dst, va);
src += 16;
dst += 16;
}
} else {
while (dst < d_end) {
va = vld2q_u8((uint8_t*)src);
rl = vqtbl1q_u8(tbl_l[0], vandq_u8(va.val[0], loset));
@ -97,15 +124,11 @@ neon_w16_split_4_multiply_region(gf_t *gf, uint16_t *src, uint16_t *dst,
va.val[0] = veorq_u8(rl, vqtbl1q_u8(tbl_l[3], va.val[1]));
va.val[1] = veorq_u8(rh, vqtbl1q_u8(tbl_h[3], va.val[1]));
if (xor) {
uint8x16x2_t vb = vld2q_u8((uint8_t*)dst);
va.val[0] = veorq_u8(va.val[0], vb.val[0]);
va.val[1] = veorq_u8(va.val[1], vb.val[1]);
}
vst2q_u8((uint8_t*)dst, va);
src += 16;
dst += 16;
}
}
}