/* Calculates the predicate control for which channels of a reg
* (containing 2 attrs) to do point sprite coordinate replacement on.
*/
static uint16_t
calculate_point_sprite_mask(struct brw_sf_compile *c, GLuint reg)
{
int vert_result1, vert_result2;
uint16_t pc = 0;
vert_result1 = vert_reg_to_vert_result(c, reg, 0);
if (vert_result1 >= VARYING_SLOT_TEX0 && vert_result1 <= VARYING_SLOT_TEX7) {
if (c->key.point_sprite_coord_replace & (1 << (vert_result1 - VARYING_SLOT_TEX0)))
pc |= 0x0f;
}
if (vert_result1 == BRW_VARYING_SLOT_PNTC)
pc |= 0x0f;
vert_result2 = vert_reg_to_vert_result(c, reg, 1);
if (vert_result2 >= VARYING_SLOT_TEX0 && vert_result2 <= VARYING_SLOT_TEX7) {
if (c->key.point_sprite_coord_replace & (1 << (vert_result2 -
VARYING_SLOT_TEX0)))
pc |= 0xf0;
}
if (vert_result2 == BRW_VARYING_SLOT_PNTC)
pc |= 0xf0;
return pc;
}
static bool
calculate_masks(struct brw_sf_compile *c,
GLuint reg,
GLushort *pc,
GLushort *pc_persp,
GLushort *pc_linear)
{
bool is_last_attr = (reg == c->nr_setup_regs - 1);
GLbitfield64 persp_mask;
GLbitfield64 linear_mask;
if (c->key.do_flat_shading)
persp_mask = c->key.attrs & ~(BITFIELD64_BIT(VERT_RESULT_HPOS) |
BITFIELD64_BIT(VERT_RESULT_COL0) |
BITFIELD64_BIT(VERT_RESULT_COL1));
else
persp_mask = c->key.attrs & ~(BITFIELD64_BIT(VERT_RESULT_HPOS));
if (c->key.do_flat_shading)
linear_mask = c->key.attrs & ~(BITFIELD64_BIT(VERT_RESULT_COL0) |
BITFIELD64_BIT(VERT_RESULT_COL1));
else
linear_mask = c->key.attrs;
*pc_persp = 0;
*pc_linear = 0;
*pc = 0xf;
if (persp_mask & BITFIELD64_BIT(vert_reg_to_vert_result(c, reg, 0)))
*pc_persp = 0xf;
if (linear_mask & BITFIELD64_BIT(vert_reg_to_vert_result(c, reg, 0)))
*pc_linear = 0xf;
/* Maybe only processs one attribute on the final round:
*/
if (vert_reg_to_vert_result(c, reg, 1) != BRW_VERT_RESULT_MAX) {
*pc |= 0xf0;
if (persp_mask & BITFIELD64_BIT(vert_reg_to_vert_result(c, reg, 1)))
*pc_persp |= 0xf0;
if (linear_mask & BITFIELD64_BIT(vert_reg_to_vert_result(c, reg, 1)))
*pc_linear |= 0xf0;
}
return is_last_attr;
}