void
vec4_generator::generate_math2_gen4(vec4_instruction *inst,
struct brw_reg dst,
struct brw_reg src0,
struct brw_reg src1)
{
/* From the Ironlake PRM, Volume 4, Part 1, Section 6.1.13
* "Message Payload":
*
* "Operand0[7]. For the INT DIV functions, this operand is the
* denominator."
* ...
* "Operand1[7]. For the INT DIV functions, this operand is the
* numerator."
*/
bool is_int_div = inst->opcode != SHADER_OPCODE_POW;
struct brw_reg &op0 = is_int_div ? src1 : src0;
struct brw_reg &op1 = is_int_div ? src0 : src1;
brw_push_insn_state(p);
brw_set_default_saturate(p, false);
brw_set_default_predicate_control(p, BRW_PREDICATE_NONE);
brw_MOV(p, retype(brw_message_reg(inst->base_mrf + 1), op1.type), op1);
brw_pop_insn_state(p);
gen4_math(p,
dst,
brw_math_function(inst->opcode),
inst->base_mrf,
op0,
BRW_MATH_DATA_VECTOR,
BRW_MATH_PRECISION_FULL);
}
void brw_math_invert( struct brw_codegen *p,
struct brw_reg dst,
struct brw_reg src)
{
gen4_math(p,
dst,
BRW_MATH_FUNCTION_INV,
0,
src,
BRW_MATH_PRECISION_FULL);
}
static void invert_det( struct brw_sf_compile *c)
{
/* Looks like we invert all 8 elements just to get 1/det in
* position 2 !?!
*/
gen4_math(&c->func,
c->inv_det,
BRW_MATH_FUNCTION_INV,
0,
c->det,
BRW_MATH_PRECISION_FULL);
}
void brw_emit_point_sprite_setup(struct brw_sf_compile *c, bool allocate)
{
struct brw_compile *p = &c->func;
GLuint i;
c->flag_value = 0xff;
c->nr_verts = 1;
if (allocate)
alloc_regs(c);
copy_z_inv_w(c);
for (i = 0; i < c->nr_setup_regs; i++)
{
struct brw_reg a0 = offset(c->vert[0], i);
GLushort pc, pc_persp, pc_linear, pc_coord_replace;
bool last = calculate_masks(c, i, &pc, &pc_persp, &pc_linear);
pc_coord_replace = calculate_point_sprite_mask(c, i);
pc_persp &= ~pc_coord_replace;
if (pc_persp) {
set_predicate_control_flag_value(p, c, pc_persp);
brw_MUL(p, a0, a0, c->inv_w[0]);
}
/* Point sprite coordinate replacement: A texcoord with this
* enabled gets replaced with the value (x, y, 0, 1) where x and
* y vary from 0 to 1 across the horizontal and vertical of the
* point.
*/
if (pc_coord_replace) {
set_predicate_control_flag_value(p, c, pc_coord_replace);
/* Caculate 1.0/PointWidth */
gen4_math(&c->func,
c->tmp,
BRW_MATH_FUNCTION_INV,
0,
c->dx0,
BRW_MATH_DATA_SCALAR,
BRW_MATH_PRECISION_FULL);
brw_set_default_access_mode(p, BRW_ALIGN_16);
/* dA/dx, dA/dy */
brw_MOV(p, c->m1Cx, brw_imm_f(0.0));
brw_MOV(p, c->m2Cy, brw_imm_f(0.0));
brw_MOV(p, brw_writemask(c->m1Cx, WRITEMASK_X), c->tmp);
if (c->key.sprite_origin_lower_left) {
brw_MOV(p, brw_writemask(c->m2Cy, WRITEMASK_Y), negate(c->tmp));
} else {
brw_MOV(p, brw_writemask(c->m2Cy, WRITEMASK_Y), c->tmp);
}
/* attribute constant offset */
brw_MOV(p, c->m3C0, brw_imm_f(0.0));
if (c->key.sprite_origin_lower_left) {
brw_MOV(p, brw_writemask(c->m3C0, WRITEMASK_YW), brw_imm_f(1.0));
} else {
brw_MOV(p, brw_writemask(c->m3C0, WRITEMASK_W), brw_imm_f(1.0));
}
brw_set_default_access_mode(p, BRW_ALIGN_1);
}
if (pc & ~pc_coord_replace) {
set_predicate_control_flag_value(p, c, pc & ~pc_coord_replace);
brw_MOV(p, c->m1Cx, brw_imm_ud(0));
brw_MOV(p, c->m2Cy, brw_imm_ud(0));
brw_MOV(p, c->m3C0, a0); /* constant value */
}
set_predicate_control_flag_value(p, c, pc);
/* Copy m0..m3 to URB. */
brw_urb_WRITE(p,
brw_null_reg(),
0,
brw_vec8_grf(0, 0),
last ? BRW_URB_WRITE_EOT_COMPLETE
: BRW_URB_WRITE_NO_FLAGS,
4, /* msg len */
0, /* response len */
i*4, /* urb destination offset */
BRW_URB_SWIZZLE_TRANSPOSE);
}
brw_set_default_predicate_control(p, BRW_PREDICATE_NONE);
}
