/**
* Emit code for TXP.
*/
static void precalc_txp( struct brw_wm_compile *c,
const struct prog_instruction *inst )
{
struct prog_src_register src0 = inst->SrcReg[0];
if (projtex(c, inst)) {
struct prog_dst_register tmp = get_temp(c);
struct prog_instruction tmp_inst;
/* tmp0.w = RCP inst.arg[0][3]
*/
emit_op(c,
OPCODE_RCP,
dst_mask(tmp, WRITEMASK_W),
0,
src_swizzle1(src0, GET_SWZ(src0.Swizzle, W)),
src_undef(),
src_undef());
/* tmp0.xyz = MUL inst.arg[0], tmp0.wwww
*/
emit_op(c,
OPCODE_MUL,
dst_mask(tmp, WRITEMASK_XYZ),
0,
src0,
src_swizzle1(src_reg_from_dst(tmp), W),
src_undef());
/* dst = precalc(TEX tmp0)
*/
tmp_inst = *inst;
tmp_inst.SrcReg[0] = src_reg_from_dst(tmp);
precalc_tex(c, &tmp_inst);
release_temp(c, tmp);
}
else
{
/* dst = precalc(TEX src0)
*/
precalc_tex(c, inst);
}
}
/**
* Emit code for TXP.
*/
static void precalc_txp( struct brw_wm_compile *c,
struct brw_fp_dst dst,
unsigned target,
unsigned unit,
struct brw_fp_src src0,
struct brw_fp_src sampler )
{
if (projtex(c, target, src0)) {
struct brw_fp_dst tmp = get_temp(c);
/* tmp0.w = RCP inst.arg[0][3]
*/
emit_op1(c,
TGSI_OPCODE_RCP,
dst_mask(tmp, BRW_WRITEMASK_W),
src_scalar(src0, W));
/* tmp0.xyz = MUL inst.arg[0], tmp0.wwww
*/
emit_op2(c,
TGSI_OPCODE_MUL,
dst_mask(tmp, BRW_WRITEMASK_XYZ),
src0,
src_scalar(src_reg_from_dst(tmp), W));
/* dst = TEX tmp0
*/
precalc_tex(c,
dst,
target,
unit,
src_reg_from_dst(tmp),
sampler );
release_temp(c, tmp);
}
else
{
/* dst = TEX src0
*/
precalc_tex(c, dst, target, unit, src0, sampler);
}
}
