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Minor optimization to heap_invert().

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samr7 2011-08-14 10:51:23 -07:00
parent 38681d7c1e
commit cb3e60750a
1 changed files with 25 additions and 6 deletions
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31
calc_addrs.cl
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@ -1152,14 +1152,33 @@ heap_invert(__global bn_word *z_heap, int batch)
bn_mul_mont(&z, &z, &a);
bn_mul_mont(&z, &z, &a);
lcell = (off * 2 * (batch - 2)) + get_global_id(0);
hcell = lcell + (off << 1);
start = (((hcell / ACCESS_STRIDE) * ACCESS_BUNDLE) +
(hcell % ACCESS_STRIDE));
/* Unroll the first iteration to avoid a load/store on the root */
lcell -= (off << 1);
hcell -= (off << 1);
bn_unroll(heap_invert_inner_store_z);
start = (((lcell / ACCESS_STRIDE) * ACCESS_BUNDLE) +
(lcell % ACCESS_STRIDE));
bn_unroll(heap_invert_inner_load_a);
for (i = 0; i < (batch-1); i++) {
lcell += off;
start = (((lcell / ACCESS_STRIDE) * ACCESS_BUNDLE) +
(lcell % ACCESS_STRIDE));
bn_unroll(heap_invert_inner_load_b);
bn_mul_mont(&c, &a, &z);
bn_unroll(heap_invert_inner_store_c);
bn_mul_mont(&c, &b, &z);
lcell -= off;
start = (((lcell / ACCESS_STRIDE) * ACCESS_BUNDLE) +
(lcell % ACCESS_STRIDE));
bn_unroll(heap_invert_inner_store_c);
lcell -= (off << 1);
for (i = 0; i < (batch-2); i++) {
start = (((hcell / ACCESS_STRIDE) * ACCESS_BUNDLE) +
(hcell % ACCESS_STRIDE));
bn_unroll(heap_invert_inner_load_z);