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_xy( struct brw_wm_compile *c )
{
if (src_is_undef(c->pixel_xy)) {
struct prog_dst_register pixel_xy = get_temp(c);
struct prog_src_register payload_r0_depth = src_reg(PROGRAM_PAYLOAD, PAYLOAD_DEPTH);
/* Emit the out calculations, and hold onto the results. Use
* two instructions as a temporary is required.
*/
/* pixel_xy.xy = PIXELXY payload[0];
*/
emit_op(c,
WM_PIXELXY,
dst_mask(pixel_xy, WRITEMASK_XY),
0,
payload_r0_depth,
src_undef(),
src_undef());
c->pixel_xy = src_reg_from_dst(pixel_xy);
}
return c->pixel_xy;
}
/* Many Mesa opcodes produce the same value across all the result channels.
* We'd rather not have to support that splatting in the opcode implementations,
* and brw_wm_pass*.c wants to optimize them out by shuffling references around
* anyway. We can easily get both by emitting the opcode to one channel, and
* then MOVing it to the others, which brw_wm_pass*.c already understands.
*/
static struct prog_instruction *emit_scalar_insn(struct brw_wm_compile *c,
const struct prog_instruction *inst0)
{
struct prog_instruction *inst;
unsigned int dst_chan;
unsigned int other_channel_mask;
if (inst0->DstReg.WriteMask == 0)
return NULL;
dst_chan = _mesa_ffs(inst0->DstReg.WriteMask) - 1;
inst = get_fp_inst(c);
*inst = *inst0;
inst->DstReg.WriteMask = 1 << dst_chan;
other_channel_mask = inst0->DstReg.WriteMask & ~(1 << dst_chan);
if (other_channel_mask != 0) {
inst = emit_op(c,
OPCODE_MOV,
dst_mask(inst0->DstReg, other_channel_mask),
0,
src_swizzle1(src_reg_from_dst(inst0->DstReg), dst_chan),
src_undef(),
src_undef());
}
return inst;
}
/**
* 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);
}
}
static void fog_blend( struct brw_wm_compile *c,
struct prog_src_register fog_factor )
{
struct prog_dst_register outcolor = dst_reg(PROGRAM_OUTPUT, FRAG_RESULT_COLR);
struct prog_src_register fogcolor = search_or_add_param5( c, STATE_FOG_COLOR, 0,0,0,0 );
/* color.xyz = LRP fog_factor.xxxx, output_color, fog_color */
emit_op(c,
OPCODE_LRP,
dst_mask(outcolor, WRITEMASK_XYZ),
0, 0, 0,
fog_factor,
src_reg_from_dst(outcolor),
fogcolor);
}
static struct brw_fp_src get_delta_xy( struct brw_wm_compile *c )
{
if (src_is_undef(c->fp_delta_xy)) {
struct brw_fp_dst delta_xy = get_temp(c);
struct brw_fp_src pixel_xy = get_pixel_xy(c);
struct brw_fp_src payload_r0_depth = src_reg(BRW_FILE_PAYLOAD, PAYLOAD_DEPTH);
/* deltas.xy = DELTAXY pixel_xy, payload[0]
*/
emit_op3(c,
WM_DELTAXY,
dst_mask(delta_xy, BRW_WRITEMASK_XY),
pixel_xy,
payload_r0_depth,
src_undef());
c->fp_delta_xy = src_reg_from_dst(delta_xy);
}
return c->fp_delta_xy;
}
static struct brw_fp_src get_pixel_xy( struct brw_wm_compile *c )
{
if (src_is_undef(c->fp_pixel_xy)) {
struct brw_fp_dst pixel_xy = get_temp(c);
struct brw_fp_src payload_r0_depth = src_reg(BRW_FILE_PAYLOAD, PAYLOAD_DEPTH);
/* Emit the out calculations, and hold onto the results. Use
* two instructions as a temporary is required.
*/
/* pixel_xy.xy = PIXELXY payload[0];
*/
emit_op1(c,
WM_PIXELXY,
dst_mask(pixel_xy, BRW_WRITEMASK_XY),
payload_r0_depth);
c->fp_pixel_xy = src_reg_from_dst(pixel_xy);
}
return c->fp_pixel_xy;
}
static struct prog_src_register get_delta_xy( struct brw_wm_compile *c )
{
if (src_is_undef(c->delta_xy)) {
struct prog_dst_register delta_xy = get_temp(c);
struct prog_src_register pixel_xy = get_pixel_xy(c);
struct prog_src_register payload_r0_depth = src_reg(PROGRAM_PAYLOAD, PAYLOAD_DEPTH);
/* deltas.xy = DELTAXY pixel_xy, payload[0]
*/
emit_op(c,
WM_DELTAXY,
dst_mask(delta_xy, WRITEMASK_XY),
0,
pixel_xy,
payload_r0_depth,
src_undef());
c->delta_xy = src_reg_from_dst(delta_xy);
}
return c->delta_xy;
}
/* Many opcodes produce the same value across all the result channels.
* We'd rather not have to support that splatting in the opcode implementations,
* and brw_wm_pass*.c wants to optimize them out by shuffling references around
* anyway. We can easily get both by emitting the opcode to one channel, and
* then MOVing it to the others, which brw_wm_pass*.c already understands.
*/
static void emit_scalar_insn(struct brw_wm_compile *c,
unsigned opcode,
struct brw_fp_dst dst,
struct brw_fp_src src0,
struct brw_fp_src src1,
struct brw_fp_src src2 )
{
unsigned first_chan = ffs(dst.writemask) - 1;
unsigned first_mask = 1 << first_chan;
if (dst.writemask == 0)
return;
emit_op3( c, opcode,
dst_mask(dst, first_mask),
src0, src1, src2 );
if (dst.writemask != first_mask) {
emit_op1(c, TGSI_OPCODE_MOV,
dst_mask(dst, ~first_mask),
src_scalar(src_reg_from_dst(dst), first_chan));
}
}
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;
}
/**
* Some TEX instructions require extra code, cube map coordinate
* normalization, or coordinate scaling for RECT textures, etc.
* This function emits those extra instructions and the TEX
* instruction itself.
*/
static void precalc_tex( struct brw_wm_compile *c,
struct brw_fp_dst dst,
unsigned target,
unsigned unit,
struct brw_fp_src src0,
struct brw_fp_src sampler )
{
struct brw_fp_src coord;
struct brw_fp_dst tmp = dst_undef();
assert(unit < BRW_MAX_TEX_UNIT);
/* Cubemap: find longest component of coord vector and normalize
* it.
*/
if (target == TGSI_TEXTURE_CUBE) {
struct brw_fp_src tmpsrc;
tmp = get_temp(c);
tmpsrc = src_reg_from_dst(tmp);
/* tmp = abs(src0) */
emit_op1(c,
TGSI_OPCODE_MOV,
tmp,
src_abs(src0));
/* tmp.X = MAX(tmp.X, tmp.Y) */
emit_op2(c, TGSI_OPCODE_MAX,
dst_mask(tmp, BRW_WRITEMASK_X),
src_scalar(tmpsrc, X),
src_scalar(tmpsrc, Y));
/* tmp.X = MAX(tmp.X, tmp.Z) */
emit_op2(c, TGSI_OPCODE_MAX,
dst_mask(tmp, BRW_WRITEMASK_X),
tmpsrc,
src_scalar(tmpsrc, Z));
/* tmp.X = 1 / tmp.X */
emit_op1(c, TGSI_OPCODE_RCP,
dst_mask(tmp, BRW_WRITEMASK_X),
tmpsrc);
/* tmp = src0 * tmp.xxxx */
emit_op2(c, TGSI_OPCODE_MUL,
tmp,
src0,
src_scalar(tmpsrc, X));
coord = tmpsrc;
}
else if (target == TGSI_TEXTURE_RECT ||
target == TGSI_TEXTURE_SHADOWRECT) {
/* XXX: need a mechanism for internally generated constants.
*/
coord = src0;
}
else {
coord = src0;
}
/* Need to emit YUV texture conversions by hand. Probably need to
* do this here - the alternative is in brw_wm_emit.c, but the
* conversion requires allocating a temporary variable which we
* don't have the facility to do that late in the compilation.
*/
if (c->key.yuvtex_mask & (1 << unit)) {
/* convert ycbcr to RGBA */
GLboolean swap_uv = c->key.yuvtex_swap_mask & (1<<unit);
struct brw_fp_dst tmp = get_temp(c);
struct brw_fp_src tmpsrc = src_reg_from_dst(tmp);
struct brw_fp_src C0 = src_imm4f( c, -.5, -.0625, -.5, 1.164 );
struct brw_fp_src C1 = src_imm4f( c, 1.596, -0.813, 2.018, -.391 );
/* tmp = TEX ...
*/
emit_tex_op(c,
TGSI_OPCODE_TEX,
dst_saturate(tmp, dst.saturate),
unit,
target,
sampler.index,
coord,
src_undef(),
src_undef());
/* tmp.xyz = ADD TMP, C0
*/
emit_op2(c, TGSI_OPCODE_ADD,
dst_mask(tmp, BRW_WRITEMASK_XYZ),
tmpsrc,
C0);
/* YUV.y = MUL YUV.y, C0.w
*/
emit_op2(c, TGSI_OPCODE_MUL,
dst_mask(tmp, BRW_WRITEMASK_Y),
tmpsrc,
src_scalar(C0, W));
/*
* if (UV swaped)
* RGB.xyz = MAD YUV.zzx, C1, YUV.y
* else
* RGB.xyz = MAD YUV.xxz, C1, YUV.y
*/
emit_op3(c, TGSI_OPCODE_MAD,
dst_mask(dst, BRW_WRITEMASK_XYZ),
( swap_uv ?
src_swizzle(tmpsrc, Z,Z,X,X) :
src_swizzle(tmpsrc, X,X,Z,Z)),
C1,
src_scalar(tmpsrc, Y));
/* RGB.y = MAD YUV.z, C1.w, RGB.y
*/
emit_op3(c,
TGSI_OPCODE_MAD,
dst_mask(dst, BRW_WRITEMASK_Y),
src_scalar(tmpsrc, Z),
src_scalar(C1, W),
src_scalar(src_reg_from_dst(dst), Y));
release_temp(c, tmp);
}
else {
/* ordinary RGBA tex instruction */
emit_tex_op(c,
TGSI_OPCODE_TEX,
dst,
unit,
target,
sampler.index,
coord,
src_undef(),
src_undef());
}
/* XXX: add GL_EXT_texture_swizzle support to gallium -- by
* generating shader variants in mesa state tracker.
*/
/* Release this temp if we ended up allocating it:
*/
if (!dst_is_undef(tmp))
release_temp(c, tmp);
}
/**
* Some TEX instructions require extra code, cube map coordinate
* normalization, or coordinate scaling for RECT textures, etc.
* This function emits those extra instructions and the TEX
* instruction itself.
*/
static void precalc_tex( struct brw_wm_compile *c,
const struct prog_instruction *inst )
{
struct prog_src_register coord;
struct prog_dst_register tmpcoord;
const GLuint unit = c->fp->program.Base.SamplerUnits[inst->TexSrcUnit];
assert(unit < BRW_MAX_TEX_UNIT);
if (inst->TexSrcTarget == TEXTURE_CUBE_INDEX) {
struct prog_instruction *out;
struct prog_dst_register tmp0 = get_temp(c);
struct prog_src_register tmp0src = src_reg_from_dst(tmp0);
struct prog_dst_register tmp1 = get_temp(c);
struct prog_src_register tmp1src = src_reg_from_dst(tmp1);
struct prog_src_register src0 = inst->SrcReg[0];
/* find longest component of coord vector and normalize it */
tmpcoord = get_temp(c);
coord = src_reg_from_dst(tmpcoord);
/* tmpcoord = src0 (i.e.: coord = src0) */
out = emit_op(c, OPCODE_MOV,
tmpcoord,
0,
src0,
src_undef(),
src_undef());
out->SrcReg[0].Negate = NEGATE_NONE;
out->SrcReg[0].Abs = 1;
/* tmp0 = MAX(coord.X, coord.Y) */
emit_op(c, OPCODE_MAX,
tmp0,
0,
src_swizzle1(coord, X),
src_swizzle1(coord, Y),
src_undef());
/* tmp1 = MAX(tmp0, coord.Z) */
emit_op(c, OPCODE_MAX,
tmp1,
0,
tmp0src,
src_swizzle1(coord, Z),
src_undef());
/* tmp0 = 1 / tmp1 */
emit_op(c, OPCODE_RCP,
dst_mask(tmp0, WRITEMASK_X),
0,
tmp1src,
src_undef(),
src_undef());
/* tmpCoord = src0 * tmp0 */
emit_op(c, OPCODE_MUL,
tmpcoord,
0,
src0,
src_swizzle1(tmp0src, SWIZZLE_X),
src_undef());
release_temp(c, tmp0);
release_temp(c, tmp1);
}
else if (inst->TexSrcTarget == TEXTURE_RECT_INDEX) {
struct prog_src_register scale =
search_or_add_param5( c,
STATE_INTERNAL,
STATE_TEXRECT_SCALE,
unit,
0,0 );
tmpcoord = get_temp(c);
/* coord.xy = MUL inst->SrcReg[0], { 1/width, 1/height }
*/
emit_op(c,
OPCODE_MUL,
tmpcoord,
0,
inst->SrcReg[0],
src_swizzle(scale,
SWIZZLE_X,
SWIZZLE_Y,
SWIZZLE_ONE,
SWIZZLE_ONE),
src_undef());
coord = src_reg_from_dst(tmpcoord);
}
else {
coord = inst->SrcReg[0];
}
/* Need to emit YUV texture conversions by hand. Probably need to
* do this here - the alternative is in brw_wm_emit.c, but the
* conversion requires allocating a temporary variable which we
* don't have the facility to do that late in the compilation.
*/
if (c->key.yuvtex_mask & (1 << unit)) {
/* convert ycbcr to RGBA */
GLboolean swap_uv = c->key.yuvtex_swap_mask & (1<<unit);
/*
CONST C0 = { -.5, -.0625, -.5, 1.164 }
CONST C1 = { 1.596, -0.813, 2.018, -.391 }
UYV = TEX ...
UYV.xyz = ADD UYV, C0
UYV.y = MUL UYV.y, C0.w
if (UV swaped)
RGB.xyz = MAD UYV.zzx, C1, UYV.y
else
RGB.xyz = MAD UYV.xxz, C1, UYV.y
RGB.y = MAD UYV.z, C1.w, RGB.y
*/
struct prog_dst_register dst = inst->DstReg;
struct prog_dst_register tmp = get_temp(c);
struct prog_src_register tmpsrc = src_reg_from_dst(tmp);
struct prog_src_register C0 = search_or_add_const4f( c, -.5, -.0625, -.5, 1.164 );
struct prog_src_register C1 = search_or_add_const4f( c, 1.596, -0.813, 2.018, -.391 );
/* tmp = TEX ...
*/
emit_tex_op(c,
OPCODE_TEX,
tmp,
inst->SaturateMode,
unit,
inst->TexSrcTarget,
inst->TexShadow,
coord,
src_undef(),
src_undef());
/* tmp.xyz = ADD TMP, C0
*/
emit_op(c,
OPCODE_ADD,
dst_mask(tmp, WRITEMASK_XYZ),
0,
tmpsrc,
C0,
src_undef());
/* YUV.y = MUL YUV.y, C0.w
*/
emit_op(c,
OPCODE_MUL,
dst_mask(tmp, WRITEMASK_Y),
0,
tmpsrc,
src_swizzle1(C0, W),
src_undef());
/*
* if (UV swaped)
* RGB.xyz = MAD YUV.zzx, C1, YUV.y
* else
* RGB.xyz = MAD YUV.xxz, C1, YUV.y
*/
emit_op(c,
OPCODE_MAD,
dst_mask(dst, WRITEMASK_XYZ),
0,
swap_uv?src_swizzle(tmpsrc, Z,Z,X,X):src_swizzle(tmpsrc, X,X,Z,Z),
C1,
src_swizzle1(tmpsrc, Y));
/* RGB.y = MAD YUV.z, C1.w, RGB.y
*/
emit_op(c,
OPCODE_MAD,
dst_mask(dst, WRITEMASK_Y),
0,
src_swizzle1(tmpsrc, Z),
src_swizzle1(C1, W),
src_swizzle1(src_reg_from_dst(dst), Y));
release_temp(c, tmp);
}
else {
/* ordinary RGBA tex instruction */
emit_tex_op(c,
OPCODE_TEX,
inst->DstReg,
inst->SaturateMode,
unit,
inst->TexSrcTarget,
inst->TexShadow,
coord,
src_undef(),
src_undef());
}
/* For GL_EXT_texture_swizzle: */
if (c->key.tex_swizzles[unit] != SWIZZLE_NOOP) {
/* swizzle the result of the TEX instruction */
struct prog_src_register tmpsrc = src_reg_from_dst(inst->DstReg);
emit_op(c, OPCODE_SWZ,
inst->DstReg,
SATURATE_OFF, /* saturate already done above */
src_swizzle4(tmpsrc, c->key.tex_swizzles[unit]),
src_undef(),
src_undef());
}
if ((inst->TexSrcTarget == TEXTURE_RECT_INDEX) ||
(inst->TexSrcTarget == TEXTURE_CUBE_INDEX))
release_temp(c, tmpcoord);
}
static void precalc_tex( struct brw_wm_compile *c,
const struct prog_instruction *inst )
{
struct prog_src_register coord;
struct prog_dst_register tmpcoord;
if (inst->TexSrcTarget == TEXTURE_RECT_INDEX) {
struct prog_src_register scale =
search_or_add_param5( c,
STATE_INTERNAL,
STATE_TEXRECT_SCALE,
inst->TexSrcUnit,
0,0 );
tmpcoord = get_temp(c);
/* coord.xy = MUL inst->SrcReg[0], { 1/width, 1/height }
*/
emit_op(c,
OPCODE_MUL,
tmpcoord,
0, 0, 0,
inst->SrcReg[0],
scale,
src_undef());
coord = src_reg_from_dst(tmpcoord);
}
else {
coord = inst->SrcReg[0];
}
/* Need to emit YUV texture conversions by hand. Probably need to
* do this here - the alternative is in brw_wm_emit.c, but the
* conversion requires allocating a temporary variable which we
* don't have the facility to do that late in the compilation.
*/
if (!(c->key.yuvtex_mask & (1<<inst->TexSrcUnit))) {
emit_op(c,
OPCODE_TEX,
inst->DstReg,
inst->SaturateMode,
inst->TexSrcUnit,
inst->TexSrcTarget,
coord,
src_undef(),
src_undef());
}
else {
/*
CONST C0 = { -.5, -.0625, -.5, 1.164 }
CONST C1 = { 1.596, -0.813, 2.018, -.391 }
UYV = TEX ...
UYV.xyz = ADD UYV, C0
UYV.y = MUL UYV.y, C0.w
RGB.xyz = MAD UYV.xxz, C1, UYV.y
RGB.y = MAD UYV.z, C1.w, RGB.y
*/
struct prog_dst_register dst = inst->DstReg;
struct prog_src_register src0 = inst->SrcReg[0];
struct prog_dst_register tmp = get_temp(c);
struct prog_src_register tmpsrc = src_reg_from_dst(tmp);
struct prog_src_register C0 = search_or_add_const4f( c, -.5, -.0625, -.5, 1.164 );
struct prog_src_register C1 = search_or_add_const4f( c, 1.596, -0.813, 2.018, -.391 );
/* tmp = TEX ...
*/
emit_op(c,
OPCODE_TEX,
tmp,
inst->SaturateMode,
inst->TexSrcUnit,
inst->TexSrcTarget,
src0,
src_undef(),
src_undef());
/* tmp.xyz = ADD TMP, C0
*/
emit_op(c,
OPCODE_ADD,
dst_mask(tmp, WRITEMASK_XYZ),
0, 0, 0,
tmpsrc,
C0,
src_undef());
/* YUV.y = MUL YUV.y, C0.w
*/
emit_op(c,
OPCODE_MUL,
dst_mask(tmp, WRITEMASK_Y),
0, 0, 0,
tmpsrc,
src_swizzle1(C0, W),
src_undef());
/* RGB.xyz = MAD YUV.xxz, C1, YUV.y
*/
emit_op(c,
OPCODE_MAD,
dst_mask(dst, WRITEMASK_XYZ),
0, 0, 0,
src_swizzle(tmpsrc, X,X,Z,Z),
C1,
src_swizzle1(tmpsrc, Y));
/* RGB.y = MAD YUV.z, C1.w, RGB.y
*/
emit_op(c,
OPCODE_MAD,
dst_mask(dst, WRITEMASK_Y),
0, 0, 0,
src_swizzle1(tmpsrc, Z),
src_swizzle1(C1, W),
src_swizzle1(src_reg_from_dst(dst), Y));
release_temp(c, tmp);
}
if (inst->TexSrcTarget == GL_TEXTURE_RECTANGLE_NV)
release_temp(c, tmpcoord);
}