// helper method to allocate a vector-component temporary array
static void alloc_tmp_vctr(
typename parent_t::mem_t *mem, const std::array<int, 1> &grid_size,
const char * __file__
)
{
alloc_tmp(mem, __file__, 1, parent_t::rng_vctr(grid_size[0])); // always one-component vectors
}
// helper method to allocate n_arr scalar temporary arrays
static void alloc_tmp_sclr(
typename parent_t::mem_t *mem, const std::array<int, 1> &grid_size,
const char * __file__, const int n_arr
)
{
alloc_tmp(mem, __file__, n_arr, parent_t::rng_sclr(grid_size[0]));
}
static void emit_lrp(struct brw_wm_compile *c,
struct prog_instruction *inst)
{
struct brw_compile *p = &c->func;
GLuint mask = inst->DstReg.WriteMask;
struct brw_reg dst, tmp1, tmp2, src0, src1, src2;
int i;
for (i = 0; i < 4; i++) {
if (mask & (1<<i)) {
dst = get_dst_reg(c, inst, i, 1);
src0 = get_src_reg(c, &inst->SrcReg[0], i, 1);
src1 = get_src_reg(c, &inst->SrcReg[1], i, 1);
if (src1.nr == dst.nr) {
tmp1 = alloc_tmp(c);
brw_MOV(p, tmp1, src1);
} else
tmp1 = src1;
src2 = get_src_reg(c, &inst->SrcReg[2], i, 1);
if (src2.nr == dst.nr) {
tmp2 = alloc_tmp(c);
brw_MOV(p, tmp2, src2);
} else
tmp2 = src2;
brw_ADD(p, dst, negate(src0), brw_imm_f(1.0));
brw_MUL(p, brw_null_reg(), dst, tmp2);
brw_set_saturate(p, (inst->SaturateMode != SATURATE_OFF) ? 1 : 0);
brw_MAC(p, dst, src0, tmp1);
brw_set_saturate(p, 0);
}
release_tmps(c);
}
}
