static int brw_wm_sample__alpha(struct brw_compile *p, int dw,
int channel, int msg, int result)
{
struct brw_reg src0;
int mlen, rlen;
if (dw == 8) {
/* SIMD8 sample return is not masked */
mlen = 3;
rlen = 4;
} else {
mlen = 5;
rlen = 2;
}
if (p->gen >= 060)
src0 = brw_message_reg(msg);
else
src0 = brw_vec8_grf(0, 0);
brw_SAMPLE(p, sample_result(dw, result), msg, src0,
channel+1, channel, WRITEMASK_W, 0,
rlen, mlen, true, simd(dw));
if (dw == 8)
result += 3;
return result;
}
static void emit_txb( struct brw_wm_compile *c,
const struct brw_wm_instruction *inst,
struct brw_reg *dst,
GLuint dst_flags,
struct brw_reg *arg )
{
struct brw_compile *p = &c->func;
GLuint msgLength;
/* Shadow ignored for txb.
*/
switch (inst->tex_idx) {
case TEXTURE_1D_INDEX:
brw_MOV(p, brw_message_reg(2), arg[0]);
brw_MOV(p, brw_message_reg(4), brw_imm_f(0));
brw_MOV(p, brw_message_reg(6), brw_imm_f(0));
break;
case TEXTURE_2D_INDEX:
case TEXTURE_RECT_INDEX:
brw_MOV(p, brw_message_reg(2), arg[0]);
brw_MOV(p, brw_message_reg(4), arg[1]);
brw_MOV(p, brw_message_reg(6), brw_imm_f(0));
break;
default:
brw_MOV(p, brw_message_reg(2), arg[0]);
brw_MOV(p, brw_message_reg(4), arg[1]);
brw_MOV(p, brw_message_reg(6), arg[2]);
break;
}
brw_MOV(p, brw_message_reg(8), arg[3]);
msgLength = 9;
brw_SAMPLE(p,
retype(vec16(dst[0]), BRW_REGISTER_TYPE_UW),
1,
retype(c->payload.depth[0].hw_reg, BRW_REGISTER_TYPE_UW),
inst->tex_unit + MAX_DRAW_BUFFERS, /* surface */
inst->tex_unit, /* sampler */
inst->writemask,
BRW_SAMPLER_MESSAGE_SIMD16_SAMPLE_BIAS,
8, /* responseLength */
msgLength,
0);
}
/* TODO
BIAS on SIMD8 not workind yet...
*/
static void emit_txb(struct brw_wm_compile *c,
struct prog_instruction *inst)
{
struct brw_compile *p = &c->func;
struct brw_reg dst[4], src[4], payload_reg;
GLuint unit = c->fp->program.Base.SamplerUnits[inst->TexSrcUnit];
GLuint i;
payload_reg = get_reg(c, PROGRAM_PAYLOAD, PAYLOAD_DEPTH, 0, 1, 0, 0);
for (i = 0; i < 4; i++)
dst[i] = get_dst_reg(c, inst, i, 1);
for (i = 0; i < 4; i++)
src[i] = get_src_reg(c, &inst->SrcReg[0], i, 1);
switch (inst->TexSrcTarget) {
case TEXTURE_1D_INDEX:
brw_MOV(p, brw_message_reg(2), src[0]);
brw_MOV(p, brw_message_reg(3), brw_imm_f(0));
brw_MOV(p, brw_message_reg(4), brw_imm_f(0));
break;
case TEXTURE_2D_INDEX:
case TEXTURE_RECT_INDEX:
brw_MOV(p, brw_message_reg(2), src[0]);
brw_MOV(p, brw_message_reg(3), src[1]);
brw_MOV(p, brw_message_reg(4), brw_imm_f(0));
break;
default:
brw_MOV(p, brw_message_reg(2), src[0]);
brw_MOV(p, brw_message_reg(3), src[1]);
brw_MOV(p, brw_message_reg(4), src[2]);
break;
}
brw_MOV(p, brw_message_reg(5), src[3]);
brw_MOV(p, brw_message_reg(6), brw_imm_f(0));
brw_SAMPLE(p,
retype(vec8(dst[0]), BRW_REGISTER_TYPE_UW),
1,
retype(payload_reg, BRW_REGISTER_TYPE_UW),
unit + MAX_DRAW_BUFFERS, /* surface */
unit, /* sampler */
inst->DstReg.WriteMask,
BRW_SAMPLER_MESSAGE_SIMD16_SAMPLE_BIAS,
4,
4,
0);
}
static void wm_src_sample_argb(struct brw_compile *p)
{
static const uint32_t fragment[][4] = {
#include "exa_wm_src_affine.g6b"
#include "exa_wm_src_sample_argb.g6b"
#include "exa_wm_write.g6b"
};
int n;
brw_push_insn_state(p);
brw_set_mask_control(p, BRW_MASK_DISABLE);
brw_set_compression_control(p, BRW_COMPRESSION_NONE);
brw_MOV(p,
retype(brw_vec1_grf(0,2), BRW_REGISTER_TYPE_UD),
brw_imm_ud(0));
brw_pop_insn_state(p);
brw_SAMPLE(p,
retype(vec16(brw_vec8_grf(14, 0)), BRW_REGISTER_TYPE_UW),
1,
retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD),
1, 0,
WRITEMASK_XYZW,
GEN5_SAMPLER_MESSAGE_SAMPLE,
8,
5,
true,
BRW_SAMPLER_SIMD_MODE_SIMD16);
for (n = 0; n < p->nr_insn; n++) {
brw_disasm(stdout, &p->store[n], 60);
}
printf("\n\n");
for (n = 0; n < ARRAY_SIZE(fragment); n++) {
brw_disasm(stdout,
(const struct brw_instruction *)&fragment[n][0],
60);
}
}
static int brw_wm_sample(struct brw_compile *p, int dw,
int channel, int msg, int result)
{
struct brw_reg src0;
bool header;
int len;
len = dw == 16 ? 4 : 2;
if (p->gen >= 060) {
header = false;
src0 = brw_message_reg(++msg);
} else {
header = true;
src0 = brw_vec8_grf(0, 0);
}
brw_SAMPLE(p, sample_result(dw, result), msg, src0,
channel+1, channel, WRITEMASK_XYZW, 0,
2*len, len+header, header, simd(dw));
return result;
}
void emit_txb(struct brw_wm_compile *c,
struct brw_reg *dst,
GLuint dst_flags,
struct brw_reg *arg,
struct brw_reg depth_payload,
GLuint tex_idx,
GLuint sampler)
{
struct brw_compile *p = &c->func;
struct intel_context *intel = &p->brw->intel;
GLuint msgLength;
GLuint msg_type;
GLuint mrf_per_channel;
GLuint response_length;
struct brw_reg dst_retyped;
/* The G45 and older chipsets don't support 8-wide dispatch for LOD biased
* samples, so we'll use the 16-wide instruction, leave the second halves
* undefined, and trust the execution mask to keep the undefined pixels
* from mattering.
*/
if (c->dispatch_width == 16 || intel->gen < 5) {
if (intel->gen >= 5)
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_BIAS;
else
msg_type = BRW_SAMPLER_MESSAGE_SIMD16_SAMPLE_BIAS;
mrf_per_channel = 2;
dst_retyped = retype(vec16(dst[0]), BRW_REGISTER_TYPE_UW);
response_length = 8;
} else {
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_BIAS;
mrf_per_channel = 1;
dst_retyped = retype(vec8(dst[0]), BRW_REGISTER_TYPE_UW);
response_length = 4;
}
/* Shadow ignored for txb. */
switch (tex_idx) {
case TEXTURE_1D_INDEX:
brw_MOV(p, brw_message_reg(2 + 0 * mrf_per_channel), arg[0]);
brw_MOV(p, brw_message_reg(2 + 1 * mrf_per_channel), brw_imm_f(0));
brw_MOV(p, brw_message_reg(2 + 2 * mrf_per_channel), brw_imm_f(0));
break;
case TEXTURE_2D_INDEX:
case TEXTURE_RECT_INDEX:
brw_MOV(p, brw_message_reg(2 + 0 * mrf_per_channel), arg[0]);
brw_MOV(p, brw_message_reg(2 + 1 * mrf_per_channel), arg[1]);
brw_MOV(p, brw_message_reg(2 + 2 * mrf_per_channel), brw_imm_f(0));
break;
case TEXTURE_3D_INDEX:
case TEXTURE_CUBE_INDEX:
brw_MOV(p, brw_message_reg(2 + 0 * mrf_per_channel), arg[0]);
brw_MOV(p, brw_message_reg(2 + 1 * mrf_per_channel), arg[1]);
brw_MOV(p, brw_message_reg(2 + 2 * mrf_per_channel), arg[2]);
break;
default:
/* unexpected target */
abort();
}
brw_MOV(p, brw_message_reg(2 + 3 * mrf_per_channel), arg[3]);
msgLength = 2 + 4 * mrf_per_channel - 1;
brw_SAMPLE(p,
dst_retyped,
1,
retype(depth_payload, BRW_REGISTER_TYPE_UW),
SURF_INDEX_TEXTURE(sampler),
sampler,
dst_flags & WRITEMASK_XYZW,
msg_type,
response_length,
msgLength,
1,
BRW_SAMPLER_SIMD_MODE_SIMD16,
BRW_SAMPLER_RETURN_FORMAT_FLOAT32);
}
void emit_tex(struct brw_wm_compile *c,
struct brw_reg *dst,
GLuint dst_flags,
struct brw_reg *arg,
struct brw_reg depth_payload,
GLuint tex_idx,
GLuint sampler,
bool shadow)
{
struct brw_compile *p = &c->func;
struct intel_context *intel = &p->brw->intel;
struct brw_reg dst_retyped;
GLuint cur_mrf = 2, response_length;
GLuint i, nr_texcoords;
GLuint emit;
GLuint msg_type;
GLuint mrf_per_channel;
GLuint simd_mode;
if (c->dispatch_width == 16) {
mrf_per_channel = 2;
response_length = 8;
dst_retyped = retype(vec16(dst[0]), BRW_REGISTER_TYPE_UW);
simd_mode = BRW_SAMPLER_SIMD_MODE_SIMD16;
} else {
mrf_per_channel = 1;
response_length = 4;
dst_retyped = retype(vec8(dst[0]), BRW_REGISTER_TYPE_UW);
simd_mode = BRW_SAMPLER_SIMD_MODE_SIMD8;
}
/* How many input regs are there?
*/
switch (tex_idx) {
case TEXTURE_1D_INDEX:
emit = WRITEMASK_X;
nr_texcoords = 1;
break;
case TEXTURE_2D_INDEX:
case TEXTURE_1D_ARRAY_INDEX:
case TEXTURE_RECT_INDEX:
emit = WRITEMASK_XY;
nr_texcoords = 2;
break;
case TEXTURE_3D_INDEX:
case TEXTURE_2D_ARRAY_INDEX:
case TEXTURE_CUBE_INDEX:
emit = WRITEMASK_XYZ;
nr_texcoords = 3;
break;
default:
/* unexpected target */
abort();
}
/* Pre-Ironlake, the 8-wide sampler always took u,v,r. */
if (intel->gen < 5 && c->dispatch_width == 8)
nr_texcoords = 3;
if (shadow) {
if (intel->gen < 7) {
/* For shadow comparisons, we have to supply u,v,r. */
nr_texcoords = 3;
} else {
/* On Ivybridge, the shadow comparitor comes first. Just load it. */
brw_MOV(p, brw_message_reg(cur_mrf), arg[2]);
cur_mrf += mrf_per_channel;
}
}
/* Emit the texcoords. */
for (i = 0; i < nr_texcoords; i++) {
if (c->key.tex.gl_clamp_mask[i] & (1 << sampler))
brw_set_saturate(p, true);
if (emit & (1<<i))
brw_MOV(p, brw_message_reg(cur_mrf), arg[i]);
else
brw_MOV(p, brw_message_reg(cur_mrf), brw_imm_f(0));
cur_mrf += mrf_per_channel;
brw_set_saturate(p, false);
}
/* Fill in the shadow comparison reference value. */
if (shadow && intel->gen < 7) {
if (intel->gen >= 5) {
/* Fill in the cube map array index value. */
brw_MOV(p, brw_message_reg(cur_mrf), brw_imm_f(0));
cur_mrf += mrf_per_channel;
} else if (c->dispatch_width == 8) {
/* Fill in the LOD bias value. */
brw_MOV(p, brw_message_reg(cur_mrf), brw_imm_f(0));
cur_mrf += mrf_per_channel;
}
brw_MOV(p, brw_message_reg(cur_mrf), arg[2]);
cur_mrf += mrf_per_channel;
}
if (intel->gen >= 5) {
if (shadow)
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_COMPARE;
else
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE;
} else {
/* Note that G45 and older determines shadow compare and dispatch width
* from message length for most messages.
*/
if (c->dispatch_width == 16 && shadow)
msg_type = BRW_SAMPLER_MESSAGE_SIMD16_SAMPLE_COMPARE;
else
msg_type = BRW_SAMPLER_MESSAGE_SIMD16_SAMPLE;
}
brw_SAMPLE(p,
dst_retyped,
1,
retype(depth_payload, BRW_REGISTER_TYPE_UW),
SURF_INDEX_TEXTURE(sampler),
sampler,
dst_flags & WRITEMASK_XYZW,
msg_type,
response_length,
cur_mrf - 1,
1,
simd_mode,
BRW_SAMPLER_RETURN_FORMAT_FLOAT32);
}
void
vec4_generator::generate_tex(vec4_instruction *inst,
struct brw_reg dst,
struct brw_reg src)
{
int msg_type = -1;
if (brw->gen >= 5) {
switch (inst->opcode) {
case SHADER_OPCODE_TEX:
case SHADER_OPCODE_TXL:
if (inst->shadow_compare) {
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_LOD_COMPARE;
} else {
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_LOD;
}
break;
case SHADER_OPCODE_TXD:
if (inst->shadow_compare) {
/* Gen7.5+. Otherwise, lowered by brw_lower_texture_gradients(). */
assert(brw->is_haswell);
msg_type = HSW_SAMPLER_MESSAGE_SAMPLE_DERIV_COMPARE;
} else {
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_DERIVS;
}
break;
case SHADER_OPCODE_TXF:
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_LD;
break;
case SHADER_OPCODE_TXF_CMS:
if (brw->gen >= 7)
msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_LD2DMS;
else
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_LD;
break;
case SHADER_OPCODE_TXF_MCS:
assert(brw->gen >= 7);
msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_LD_MCS;
break;
case SHADER_OPCODE_TXS:
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_RESINFO;
break;
case SHADER_OPCODE_TG4:
if (inst->shadow_compare) {
msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_GATHER4_C;
} else {
msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_GATHER4;
}
break;
case SHADER_OPCODE_TG4_OFFSET:
if (inst->shadow_compare) {
msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_GATHER4_PO_C;
} else {
msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_GATHER4_PO;
}
break;
default:
assert(!"should not get here: invalid vec4 texture opcode");
break;
}
} else {
switch (inst->opcode) {
case SHADER_OPCODE_TEX:
case SHADER_OPCODE_TXL:
if (inst->shadow_compare) {
msg_type = BRW_SAMPLER_MESSAGE_SIMD4X2_SAMPLE_LOD_COMPARE;
assert(inst->mlen == 3);
} else {
msg_type = BRW_SAMPLER_MESSAGE_SIMD4X2_SAMPLE_LOD;
assert(inst->mlen == 2);
}
break;
case SHADER_OPCODE_TXD:
/* There is no sample_d_c message; comparisons are done manually. */
msg_type = BRW_SAMPLER_MESSAGE_SIMD4X2_SAMPLE_GRADIENTS;
assert(inst->mlen == 4);
break;
case SHADER_OPCODE_TXF:
msg_type = BRW_SAMPLER_MESSAGE_SIMD4X2_LD;
assert(inst->mlen == 2);
break;
case SHADER_OPCODE_TXS:
msg_type = BRW_SAMPLER_MESSAGE_SIMD4X2_RESINFO;
assert(inst->mlen == 2);
break;
default:
assert(!"should not get here: invalid vec4 texture opcode");
break;
}
}
assert(msg_type != -1);
/* Load the message header if present. If there's a texture offset, we need
* to set it up explicitly and load the offset bitfield. Otherwise, we can
* use an implied move from g0 to the first message register.
*/
if (inst->header_present) {
if (brw->gen < 6 && !inst->texture_offset) {
/* Set up an implied move from g0 to the MRF. */
src = brw_vec8_grf(0, 0);
} else {
struct brw_reg header =
retype(brw_message_reg(inst->base_mrf), BRW_REGISTER_TYPE_UD);
/* Explicitly set up the message header by copying g0 to the MRF. */
brw_push_insn_state(p);
brw_set_mask_control(p, BRW_MASK_DISABLE);
brw_MOV(p, header, retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD));
brw_set_access_mode(p, BRW_ALIGN_1);
if (inst->texture_offset) {
/* Set the texel offset bits in DWord 2. */
brw_MOV(p, get_element_ud(header, 2),
brw_imm_ud(inst->texture_offset));
}
if (inst->sampler >= 16) {
/* The "Sampler Index" field can only store values between 0 and 15.
* However, we can add an offset to the "Sampler State Pointer"
* field, effectively selecting a different set of 16 samplers.
*
* The "Sampler State Pointer" needs to be aligned to a 32-byte
* offset, and each sampler state is only 16-bytes, so we can't
* exclusively use the offset - we have to use both.
*/
assert(brw->is_haswell); /* field only exists on Haswell */
brw_ADD(p,
get_element_ud(header, 3),
get_element_ud(brw_vec8_grf(0, 0), 3),
brw_imm_ud(16 * (inst->sampler / 16) *
sizeof(gen7_sampler_state)));
}
brw_pop_insn_state(p);
}
}
uint32_t return_format;
switch (dst.type) {
case BRW_REGISTER_TYPE_D:
return_format = BRW_SAMPLER_RETURN_FORMAT_SINT32;
break;
case BRW_REGISTER_TYPE_UD:
return_format = BRW_SAMPLER_RETURN_FORMAT_UINT32;
break;
default:
return_format = BRW_SAMPLER_RETURN_FORMAT_FLOAT32;
break;
}
uint32_t surface_index = ((inst->opcode == SHADER_OPCODE_TG4 ||
inst->opcode == SHADER_OPCODE_TG4_OFFSET)
? prog_data->base.binding_table.gather_texture_start
: prog_data->base.binding_table.texture_start) + inst->sampler;
brw_SAMPLE(p,
dst,
inst->base_mrf,
src,
surface_index,
inst->sampler % 16,
msg_type,
1, /* response length */
inst->mlen,
inst->header_present,
BRW_SAMPLER_SIMD_MODE_SIMD4X2,
return_format);
brw_mark_surface_used(&prog_data->base, surface_index);
}
void
vec4_generator::generate_tex(vec4_instruction *inst,
struct brw_reg dst,
struct brw_reg src,
struct brw_reg sampler_index)
{
int msg_type = -1;
if (brw->gen >= 5) {
switch (inst->opcode) {
case SHADER_OPCODE_TEX:
case SHADER_OPCODE_TXL:
if (inst->shadow_compare) {
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_LOD_COMPARE;
} else {
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_LOD;
}
break;
case SHADER_OPCODE_TXD:
if (inst->shadow_compare) {
/* Gen7.5+. Otherwise, lowered by brw_lower_texture_gradients(). */
assert(brw->gen >= 8 || brw->is_haswell);
msg_type = HSW_SAMPLER_MESSAGE_SAMPLE_DERIV_COMPARE;
} else {
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_DERIVS;
}
break;
case SHADER_OPCODE_TXF:
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_LD;
break;
case SHADER_OPCODE_TXF_CMS:
if (brw->gen >= 7)
msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_LD2DMS;
else
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_LD;
break;
case SHADER_OPCODE_TXF_MCS:
assert(brw->gen >= 7);
msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_LD_MCS;
break;
case SHADER_OPCODE_TXS:
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_RESINFO;
break;
case SHADER_OPCODE_TG4:
if (inst->shadow_compare) {
msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_GATHER4_C;
} else {
msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_GATHER4;
}
break;
case SHADER_OPCODE_TG4_OFFSET:
if (inst->shadow_compare) {
msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_GATHER4_PO_C;
} else {
msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_GATHER4_PO;
}
break;
default:
unreachable("should not get here: invalid vec4 texture opcode");
}
} else {
switch (inst->opcode) {
case SHADER_OPCODE_TEX:
case SHADER_OPCODE_TXL:
if (inst->shadow_compare) {
msg_type = BRW_SAMPLER_MESSAGE_SIMD4X2_SAMPLE_LOD_COMPARE;
assert(inst->mlen == 3);
} else {
msg_type = BRW_SAMPLER_MESSAGE_SIMD4X2_SAMPLE_LOD;
assert(inst->mlen == 2);
}
break;
case SHADER_OPCODE_TXD:
/* There is no sample_d_c message; comparisons are done manually. */
msg_type = BRW_SAMPLER_MESSAGE_SIMD4X2_SAMPLE_GRADIENTS;
assert(inst->mlen == 4);
break;
case SHADER_OPCODE_TXF:
msg_type = BRW_SAMPLER_MESSAGE_SIMD4X2_LD;
assert(inst->mlen == 2);
break;
case SHADER_OPCODE_TXS:
msg_type = BRW_SAMPLER_MESSAGE_SIMD4X2_RESINFO;
assert(inst->mlen == 2);
break;
default:
unreachable("should not get here: invalid vec4 texture opcode");
}
}
assert(msg_type != -1);
assert(sampler_index.type == BRW_REGISTER_TYPE_UD);
/* Load the message header if present. If there's a texture offset, we need
* to set it up explicitly and load the offset bitfield. Otherwise, we can
* use an implied move from g0 to the first message register.
*/
if (inst->header_present) {
if (brw->gen < 6 && !inst->texture_offset) {
/* Set up an implied move from g0 to the MRF. */
src = brw_vec8_grf(0, 0);
} else {
struct brw_reg header =
retype(brw_message_reg(inst->base_mrf), BRW_REGISTER_TYPE_UD);
/* Explicitly set up the message header by copying g0 to the MRF. */
brw_push_insn_state(p);
brw_set_default_mask_control(p, BRW_MASK_DISABLE);
brw_MOV(p, header, retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD));
brw_set_default_access_mode(p, BRW_ALIGN_1);
if (inst->texture_offset) {
/* Set the texel offset bits in DWord 2. */
brw_MOV(p, get_element_ud(header, 2),
brw_imm_ud(inst->texture_offset));
}
brw_adjust_sampler_state_pointer(p, header, sampler_index, dst);
brw_pop_insn_state(p);
}
}
uint32_t return_format;
switch (dst.type) {
case BRW_REGISTER_TYPE_D:
return_format = BRW_SAMPLER_RETURN_FORMAT_SINT32;
break;
case BRW_REGISTER_TYPE_UD:
return_format = BRW_SAMPLER_RETURN_FORMAT_UINT32;
break;
default:
return_format = BRW_SAMPLER_RETURN_FORMAT_FLOAT32;
break;
}
uint32_t base_binding_table_index = (inst->opcode == SHADER_OPCODE_TG4 ||
inst->opcode == SHADER_OPCODE_TG4_OFFSET)
? prog_data->base.binding_table.gather_texture_start
: prog_data->base.binding_table.texture_start;
if (sampler_index.file == BRW_IMMEDIATE_VALUE) {
uint32_t sampler = sampler_index.dw1.ud;
brw_SAMPLE(p,
dst,
inst->base_mrf,
src,
sampler + base_binding_table_index,
sampler % 16,
msg_type,
1, /* response length */
inst->mlen,
inst->header_present,
BRW_SAMPLER_SIMD_MODE_SIMD4X2,
return_format);
brw_mark_surface_used(&prog_data->base, sampler + base_binding_table_index);
} else {
/* Non-constant sampler index. */
/* Note: this clobbers `dst` as a temporary before emitting the send */
struct brw_reg addr = vec1(retype(brw_address_reg(0), BRW_REGISTER_TYPE_UD));
struct brw_reg temp = vec1(retype(dst, BRW_REGISTER_TYPE_UD));
struct brw_reg sampler_reg = vec1(retype(sampler_index, BRW_REGISTER_TYPE_UD));
brw_push_insn_state(p);
brw_set_default_mask_control(p, BRW_MASK_DISABLE);
brw_set_default_access_mode(p, BRW_ALIGN_1);
/* Some care required: `sampler` and `temp` may alias:
* addr = sampler & 0xff
* temp = (sampler << 8) & 0xf00
* addr = addr | temp
*/
brw_ADD(p, addr, sampler_reg, brw_imm_ud(base_binding_table_index));
brw_SHL(p, temp, sampler_reg, brw_imm_ud(8u));
brw_AND(p, temp, temp, brw_imm_ud(0x0f00));
brw_AND(p, addr, addr, brw_imm_ud(0x0ff));
brw_OR(p, addr, addr, temp);
/* a0.0 |= <descriptor> */
brw_inst *insn_or = brw_next_insn(p, BRW_OPCODE_OR);
brw_set_sampler_message(p, insn_or,
0 /* surface */,
0 /* sampler */,
msg_type,
1 /* rlen */,
inst->mlen /* mlen */,
inst->header_present /* header */,
BRW_SAMPLER_SIMD_MODE_SIMD4X2,
return_format);
brw_inst_set_exec_size(p->brw, insn_or, BRW_EXECUTE_1);
brw_inst_set_src1_reg_type(p->brw, insn_or, BRW_REGISTER_TYPE_UD);
brw_set_src0(p, insn_or, addr);
brw_set_dest(p, insn_or, addr);
/* dst = send(offset, a0.0) */
brw_inst *insn_send = brw_next_insn(p, BRW_OPCODE_SEND);
brw_set_dest(p, insn_send, dst);
brw_set_src0(p, insn_send, src);
brw_set_indirect_send_descriptor(p, insn_send, BRW_SFID_SAMPLER, addr);
brw_pop_insn_state(p);
/* visitor knows more than we do about the surface limit required,
* so has already done marking.
*/
}
}
void
vec4_generator::generate_tex(vec4_instruction *inst,
struct brw_reg dst,
struct brw_reg src)
{
int msg_type = -1;
if (intel->gen >= 5) {
switch (inst->opcode) {
case SHADER_OPCODE_TEX:
case SHADER_OPCODE_TXL:
if (inst->shadow_compare) {
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_LOD_COMPARE;
} else {
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_LOD;
}
break;
case SHADER_OPCODE_TXD:
/* There is no sample_d_c message; comparisons are done manually. */
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_DERIVS;
break;
case SHADER_OPCODE_TXF:
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_LD;
break;
case SHADER_OPCODE_TXS:
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_RESINFO;
break;
default:
assert(!"should not get here: invalid VS texture opcode");
break;
}
} else {
switch (inst->opcode) {
case SHADER_OPCODE_TEX:
case SHADER_OPCODE_TXL:
if (inst->shadow_compare) {
msg_type = BRW_SAMPLER_MESSAGE_SIMD4X2_SAMPLE_LOD_COMPARE;
assert(inst->mlen == 3);
} else {
msg_type = BRW_SAMPLER_MESSAGE_SIMD4X2_SAMPLE_LOD;
assert(inst->mlen == 2);
}
break;
case SHADER_OPCODE_TXD:
/* There is no sample_d_c message; comparisons are done manually. */
msg_type = BRW_SAMPLER_MESSAGE_SIMD4X2_SAMPLE_GRADIENTS;
assert(inst->mlen == 4);
break;
case SHADER_OPCODE_TXF:
msg_type = BRW_SAMPLER_MESSAGE_SIMD4X2_LD;
assert(inst->mlen == 2);
break;
case SHADER_OPCODE_TXS:
msg_type = BRW_SAMPLER_MESSAGE_SIMD4X2_RESINFO;
assert(inst->mlen == 2);
break;
default:
assert(!"should not get here: invalid VS texture opcode");
break;
}
}
assert(msg_type != -1);
/* Load the message header if present. If there's a texture offset, we need
* to set it up explicitly and load the offset bitfield. Otherwise, we can
* use an implied move from g0 to the first message register.
*/
if (inst->texture_offset) {
/* Explicitly set up the message header by copying g0 to the MRF. */
brw_MOV(p, retype(brw_message_reg(inst->base_mrf), BRW_REGISTER_TYPE_UD),
retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD));
/* Then set the offset bits in DWord 2. */
brw_set_access_mode(p, BRW_ALIGN_1);
brw_MOV(p,
retype(brw_vec1_reg(BRW_MESSAGE_REGISTER_FILE, inst->base_mrf, 2),
BRW_REGISTER_TYPE_UD),
brw_imm_uw(inst->texture_offset));
brw_set_access_mode(p, BRW_ALIGN_16);
} else if (inst->header_present) {
/* Set up an implied move from g0 to the MRF. */
src = brw_vec8_grf(0, 0);
}
uint32_t return_format;
switch (dst.type) {
case BRW_REGISTER_TYPE_D:
return_format = BRW_SAMPLER_RETURN_FORMAT_SINT32;
break;
case BRW_REGISTER_TYPE_UD:
return_format = BRW_SAMPLER_RETURN_FORMAT_UINT32;
break;
default:
return_format = BRW_SAMPLER_RETURN_FORMAT_FLOAT32;
break;
}
brw_SAMPLE(p,
dst,
inst->base_mrf,
src,
SURF_INDEX_VS_TEXTURE(inst->sampler),
inst->sampler,
WRITEMASK_XYZW,
msg_type,
1, /* response length */
inst->mlen,
inst->header_present,
BRW_SAMPLER_SIMD_MODE_SIMD4X2,
return_format);
}
static void emit_tex( struct brw_wm_compile *c,
const struct brw_wm_instruction *inst,
struct brw_reg *dst,
GLuint dst_flags,
struct brw_reg *arg )
{
struct brw_compile *p = &c->func;
GLuint msgLength, responseLength;
GLboolean shadow = (c->key.shadowtex_mask & (1<<inst->tex_unit)) ? 1 : 0;
GLuint i, nr;
GLuint emit;
/* How many input regs are there?
*/
switch (inst->tex_idx) {
case TEXTURE_1D_INDEX:
emit = WRITEMASK_X;
nr = 1;
break;
case TEXTURE_2D_INDEX:
case TEXTURE_RECT_INDEX:
emit = WRITEMASK_XY;
nr = 2;
break;
default:
emit = WRITEMASK_XYZ;
nr = 3;
break;
}
if (shadow) {
nr = 4;
emit |= WRITEMASK_W;
}
msgLength = 1;
for (i = 0; i < nr; i++) {
static const GLuint swz[4] = {0,1,2,2};
if (emit & (1<<i))
brw_MOV(p, brw_message_reg(msgLength+1), arg[swz[i]]);
else
brw_MOV(p, brw_message_reg(msgLength+1), brw_imm_f(0));
msgLength += 2;
}
responseLength = 8; /* always */
brw_SAMPLE(p,
retype(vec16(dst[0]), BRW_REGISTER_TYPE_UW),
1,
retype(c->payload.depth[0].hw_reg, BRW_REGISTER_TYPE_UW),
inst->tex_unit + MAX_DRAW_BUFFERS, /* surface */
inst->tex_unit, /* sampler */
inst->writemask,
(shadow ?
BRW_SAMPLER_MESSAGE_SIMD16_SAMPLE_COMPARE :
BRW_SAMPLER_MESSAGE_SIMD16_SAMPLE),
responseLength,
msgLength,
0);
}
static void emit_tex(struct brw_wm_compile *c,
struct prog_instruction *inst)
{
struct brw_compile *p = &c->func;
struct brw_reg dst[4], src[4], payload_reg;
GLuint unit = c->fp->program.Base.SamplerUnits[inst->TexSrcUnit];
GLuint msg_len;
GLuint i, nr;
GLuint emit;
GLboolean shadow = (c->key.shadowtex_mask & (1<<unit)) ? 1 : 0;
payload_reg = get_reg(c, PROGRAM_PAYLOAD, PAYLOAD_DEPTH, 0, 1, 0, 0);
for (i = 0; i < 4; i++)
dst[i] = get_dst_reg(c, inst, i, 1);
for (i = 0; i < 4; i++)
src[i] = get_src_reg(c, &inst->SrcReg[0], i, 1);
switch (inst->TexSrcTarget) {
case TEXTURE_1D_INDEX:
emit = WRITEMASK_X;
nr = 1;
break;
case TEXTURE_2D_INDEX:
case TEXTURE_RECT_INDEX:
emit = WRITEMASK_XY;
nr = 2;
break;
default:
emit = WRITEMASK_XYZ;
nr = 3;
break;
}
msg_len = 1;
for (i = 0; i < nr; i++) {
static const GLuint swz[4] = {0,1,2,2};
if (emit & (1<<i))
brw_MOV(p, brw_message_reg(msg_len+1), src[swz[i]]);
else
brw_MOV(p, brw_message_reg(msg_len+1), brw_imm_f(0));
msg_len += 1;
}
if (shadow) {
brw_MOV(p, brw_message_reg(5), brw_imm_f(0));
brw_MOV(p, brw_message_reg(6), src[2]);
}
brw_SAMPLE(p,
retype(vec8(dst[0]), BRW_REGISTER_TYPE_UW),
1,
retype(payload_reg, BRW_REGISTER_TYPE_UW),
unit + MAX_DRAW_BUFFERS, /* surface */
unit, /* sampler */
inst->DstReg.WriteMask,
BRW_SAMPLER_MESSAGE_SIMD8_SAMPLE,
4,
shadow ? 6 : 4,
0);
if (shadow)
brw_MOV(p, dst[3], brw_imm_f(1.0));
}