static struct brw_fp_src get_pixel_w( struct brw_wm_compile *c )
{
if (src_is_undef(c->fp_pixel_w)) {
struct brw_fp_dst pixel_w = get_temp(c);
struct brw_fp_src deltas = get_delta_xy(c);
/* XXX: assuming position is always first -- valid?
*/
struct brw_fp_src interp_wpos = src_reg(BRW_FILE_PAYLOAD, 0);
/* deltas.xyw = DELTAS2 deltas.xy, payload.interp_wpos.x
*/
emit_op3(c,
WM_PIXELW,
dst_mask(pixel_w, BRW_WRITEMASK_W),
interp_wpos,
deltas,
src_undef());
c->fp_pixel_w = src_reg_from_dst(pixel_w);
}
return c->fp_pixel_w;
}
static struct prog_src_register get_pixel_w( struct brw_wm_compile *c )
{
if (src_is_undef(c->pixel_w)) {
struct prog_dst_register pixel_w = get_temp(c);
struct prog_src_register deltas = get_delta_xy(c);
struct prog_src_register interp_wpos = src_reg(PROGRAM_PAYLOAD, FRAG_ATTRIB_WPOS);
/* deltas.xyw = DELTAS2 deltas.xy, payload.interp_wpos.x
*/
emit_op(c,
WM_PIXELW,
dst_mask(pixel_w, WRITEMASK_W),
0,
interp_wpos,
deltas,
src_undef());
c->pixel_w = src_reg_from_dst(pixel_w);
}
return c->pixel_w;
}
static void emit_interp( struct brw_wm_compile *c,
GLuint idx,
GLuint semantic,
GLuint interp_mode )
{
struct brw_fp_dst dst = dst_reg(TGSI_FILE_INPUT, idx);
struct brw_fp_src interp = src_reg(BRW_FILE_PAYLOAD, idx);
struct brw_fp_src deltas = get_delta_xy(c);
/* Need to use PINTERP on attributes which have been
* multiplied by 1/W in the SF program, and LINTERP on those
* which have not:
*/
switch (semantic) {
case TGSI_SEMANTIC_POSITION:
/* Have to treat wpos.xy specially:
*/
emit_op1(c,
WM_WPOSXY,
dst_mask(dst, BRW_WRITEMASK_XY),
get_pixel_xy(c));
/* TGSI_FILE_INPUT.attr.xyzw = INTERP payload.interp[attr].x, deltas.xyw
*/
emit_op2(c,
WM_LINTERP,
dst_mask(dst, BRW_WRITEMASK_ZW),
interp,
deltas);
break;
case TGSI_SEMANTIC_COLOR:
if (c->key.flat_shade) {
emit_op1(c,
WM_CINTERP,
dst,
interp);
}
else if (interp_mode == TGSI_INTERPOLATE_LINEAR) {
emit_op2(c,
WM_LINTERP,
dst,
interp,
deltas);
}
else {
emit_op3(c,
WM_PINTERP,
dst,
interp,
deltas,
get_pixel_w(c));
}
break;
case TGSI_SEMANTIC_FOG:
/* Interpolate the fog coordinate */
emit_op3(c,
WM_PINTERP,
dst_mask(dst, BRW_WRITEMASK_X),
interp,
deltas,
get_pixel_w(c));
emit_op1(c,
TGSI_OPCODE_MOV,
dst_mask(dst, BRW_WRITEMASK_YZ),
src_imm1f(c, 0.0));
emit_op1(c,
TGSI_OPCODE_MOV,
dst_mask(dst, BRW_WRITEMASK_W),
src_imm1f(c, 1.0));
break;
case TGSI_SEMANTIC_FACE:
/* XXX review/test this case */
emit_op0(c,
WM_FRONTFACING,
dst_mask(dst, BRW_WRITEMASK_X));
emit_op1(c,
TGSI_OPCODE_MOV,
dst_mask(dst, BRW_WRITEMASK_YZ),
src_imm1f(c, 0.0));
emit_op1(c,
TGSI_OPCODE_MOV,
dst_mask(dst, BRW_WRITEMASK_W),
src_imm1f(c, 1.0));
break;
case TGSI_SEMANTIC_PSIZE:
/* XXX review/test this case */
emit_op3(c,
WM_PINTERP,
dst_mask(dst, BRW_WRITEMASK_XY),
interp,
deltas,
get_pixel_w(c));
emit_op1(c,
TGSI_OPCODE_MOV,
dst_mask(dst, BRW_WRITEMASK_Z),
src_imm1f(c, 0.0f));
emit_op1(c,
TGSI_OPCODE_MOV,
dst_mask(dst, BRW_WRITEMASK_W),
src_imm1f(c, 1.0f));
break;
default:
switch (interp_mode) {
case TGSI_INTERPOLATE_CONSTANT:
emit_op1(c,
WM_CINTERP,
dst,
interp);
break;
case TGSI_INTERPOLATE_LINEAR:
emit_op2(c,
WM_LINTERP,
dst,
interp,
deltas);
break;
case TGSI_INTERPOLATE_PERSPECTIVE:
emit_op3(c,
WM_PINTERP,
dst,
interp,
deltas,
get_pixel_w(c));
break;
}
break;
}
}
static void emit_interp( struct brw_wm_compile *c,
GLuint idx )
{
struct prog_dst_register dst = dst_reg(PROGRAM_INPUT, idx);
struct prog_src_register interp = src_reg(PROGRAM_PAYLOAD, idx);
struct prog_src_register deltas = get_delta_xy(c);
/* Need to use PINTERP on attributes which have been
* multiplied by 1/W in the SF program, and LINTERP on those
* which have not:
*/
switch (idx) {
case FRAG_ATTRIB_WPOS:
/* Have to treat wpos.xy specially:
*/
emit_op(c,
WM_WPOSXY,
dst_mask(dst, WRITEMASK_XY),
0,
get_pixel_xy(c),
src_undef(),
src_undef());
dst = dst_mask(dst, WRITEMASK_ZW);
/* PROGRAM_INPUT.attr.xyzw = INTERP payload.interp[attr].x, deltas.xyw
*/
emit_op(c,
WM_LINTERP,
dst,
0,
interp,
deltas,
src_undef());
break;
case FRAG_ATTRIB_COL0:
case FRAG_ATTRIB_COL1:
if (c->key.flat_shade) {
emit_op(c,
WM_CINTERP,
dst,
0,
interp,
src_undef(),
src_undef());
}
else {
if (c->key.linear_color) {
emit_op(c,
WM_LINTERP,
dst,
0,
interp,
deltas,
src_undef());
}
else {
/* perspective-corrected color interpolation */
emit_op(c,
WM_PINTERP,
dst,
0,
interp,
deltas,
get_pixel_w(c));
}
}
break;
case FRAG_ATTRIB_FOGC:
/* Interpolate the fog coordinate */
emit_op(c,
WM_PINTERP,
dst_mask(dst, WRITEMASK_X),
0,
interp,
deltas,
get_pixel_w(c));
emit_op(c,
OPCODE_MOV,
dst_mask(dst, WRITEMASK_YZW),
0,
src_swizzle(interp,
SWIZZLE_ZERO,
SWIZZLE_ZERO,
SWIZZLE_ZERO,
SWIZZLE_ONE),
src_undef(),
src_undef());
break;
case FRAG_ATTRIB_FACE:
emit_op(c,
WM_FRONTFACING,
dst_mask(dst, WRITEMASK_X),
0,
src_undef(),
src_undef(),
src_undef());
break;
case FRAG_ATTRIB_PNTC:
/* XXX review/test this case */
emit_op(c,
WM_PINTERP,
dst_mask(dst, WRITEMASK_XY),
0,
interp,
deltas,
get_pixel_w(c));
emit_op(c,
OPCODE_MOV,
dst_mask(dst, WRITEMASK_ZW),
0,
src_swizzle(interp,
SWIZZLE_ZERO,
SWIZZLE_ZERO,
SWIZZLE_ZERO,
SWIZZLE_ONE),
src_undef(),
src_undef());
break;
default:
emit_op(c,
WM_PINTERP,
dst,
0,
interp,
deltas,
get_pixel_w(c));
break;
}
c->fp_interp_emitted |= 1<<idx;
}
static void emit_interp( struct brw_wm_compile *c,
GLuint idx )
{
struct prog_dst_register dst = dst_reg(PROGRAM_INPUT, idx);
struct prog_src_register interp = src_reg(PROGRAM_PAYLOAD, idx);
struct prog_src_register deltas = get_delta_xy(c);
struct prog_src_register arg2;
GLuint opcode;
/* Need to use PINTERP on attributes which have been
* multiplied by 1/W in the SF program, and LINTERP on those
* which have not:
*/
switch (idx) {
case FRAG_ATTRIB_WPOS:
opcode = WM_LINTERP;
arg2 = src_undef();
/* Have to treat wpos.xy specially:
*/
emit_op(c,
WM_WPOSXY,
dst_mask(dst, WRITEMASK_XY),
0, 0, 0,
get_pixel_xy(c),
src_undef(),
src_undef());
dst = dst_mask(dst, WRITEMASK_ZW);
/* PROGRAM_INPUT.attr.xyzw = INTERP payload.interp[attr].x, deltas.xyw
*/
emit_op(c,
WM_LINTERP,
dst,
0, 0, 0,
interp,
deltas,
arg2);
break;
case FRAG_ATTRIB_COL0:
case FRAG_ATTRIB_COL1:
if (c->key.flat_shade) {
emit_op(c,
WM_CINTERP,
dst,
0, 0, 0,
interp,
src_undef(),
src_undef());
}
else {
emit_op(c,
WM_LINTERP,
dst,
0, 0, 0,
interp,
deltas,
src_undef());
}
break;
default:
emit_op(c,
WM_PINTERP,
dst,
0, 0, 0,
interp,
deltas,
get_pixel_w(c));
break;
}
c->fp_interp_emitted |= 1<<idx;
}
