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i965/vec4: take into account doubles when creating attribute mapping

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Doubles needs more that one slot per attribute. So when filling the
attribute_map we check if it is a double in order to allocate one
extra register.

Signed-off-by: Alejandro Piñeiro <apinheiro@igalia.com>
Signed-off-by: Juan A. Suarez Romero <jasuarez@igalia.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
This commit is contained in:
Alejandro Piñeiro 2016-04-21 14:16:18 +02:00 • committed by Juan A. Suarez Romero
parent 57bab6708f
commit 58fdb85f0f
1 changed files with 9 additions and 4 deletions
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13
src/mesa/drivers/dri/i965/brw_vec4.cpp
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@ -1733,10 +1733,15 @@ vec4_vs_visitor::setup_attributes(int payload_reg)
memset(attribute_map, 0, sizeof(attribute_map));
nr_attributes = 0;
for (int i = 0; i < VERT_ATTRIB_MAX; i++) {
if (vs_prog_data->inputs_read & BITFIELD64_BIT(i)) {
attribute_map[i] = payload_reg + nr_attributes;
nr_attributes++;
GLbitfield64 vs_inputs = vs_prog_data->inputs_read;
while (vs_inputs) {
GLuint first = ffsll(vs_inputs) - 1;
int needed_slots =
(vs_prog_data->double_inputs_read & BITFIELD64_BIT(first)) ? 2 : 1;
for (int c = 0; c < needed_slots; c++) {
attribute_map[nr_attributes] = payload_reg + nr_attributes;
nr_attributes++;
vs_inputs &= ~BITFIELD64_BIT(first + c);
}
}