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i965/fs: Implement texelFetch() on Gen4.

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Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Kenneth Graunke
2011-09-06 16:39:01 -07:00
parent 0edf5d63d6
commit 47b556fbca
2 changed files with 18 additions and 4 deletions
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src/mesa/drivers/dri/i965/brw_fs_emit.cpp
+5
View File
@@ -295,6 +295,11 @@ fs_visitor::generate_tex(fs_inst *inst, struct brw_reg dst, struct brw_reg src)
assert(inst->mlen == 7 || inst->mlen == 10);
msg_type = BRW_SAMPLER_MESSAGE_SIMD8_SAMPLE_GRADIENTS;
break;
case FS_OPCODE_TXF:
assert(inst->mlen == 9);
msg_type = BRW_SAMPLER_MESSAGE_SIMD16_LD;
simd_mode = BRW_SAMPLER_SIMD_MODE_SIMD16;
break;
case FS_OPCODE_TXS:
assert(inst->mlen == 3);
msg_type = BRW_SAMPLER_MESSAGE_SIMD16_RESINFO;
src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
+13 -4
View File
@@ -678,17 +678,25 @@ fs_visitor::emit_texture_gen4(ir_texture *ir, fs_reg dst, fs_reg coordinate,
* instructions. We'll need to do SIMD16 here.
*/
simd16 = true;
assert(ir->op == ir_txb || ir->op == ir_txl);
assert(ir->op == ir_txb || ir->op == ir_txl || ir->op == ir_txf);
for (int i = 0; i < ir->coordinate->type->vector_elements; i++) {
fs_inst *inst = emit(BRW_OPCODE_MOV, fs_reg(MRF,
base_mrf + mlen + i * 2),
base_mrf + mlen + i * 2,
coordinate.type),
coordinate);
if (i < 3 && c->key.gl_clamp_mask[i] & (1 << sampler))
inst->saturate = true;
coordinate.reg_offset++;
}
/* Initialize the rest of u/v/r with 0.0. Empirically, this seems to
* be necessary for TXF (ld), but seems wise to do for all messages.
*/
for (int i = ir->coordinate->type->vector_elements; i < 3; i++) {
emit(BRW_OPCODE_MOV, fs_reg(MRF, base_mrf + mlen + i * 2), fs_reg(0.0f));
}
/* lod/bias appears after u/v/r. */
mlen += 6;
@@ -698,7 +706,8 @@ fs_visitor::emit_texture_gen4(ir_texture *ir, fs_reg dst, fs_reg coordinate,
mlen++;
} else {
ir->lod_info.lod->accept(this);
emit(BRW_OPCODE_MOV, fs_reg(MRF, base_mrf + mlen), this->result);
emit(BRW_OPCODE_MOV, fs_reg(MRF, base_mrf + mlen, this->result.type),
this->result);
mlen++;
}
@@ -737,7 +746,7 @@ fs_visitor::emit_texture_gen4(ir_texture *ir, fs_reg dst, fs_reg coordinate,
inst = emit(FS_OPCODE_TXS, dst);
break;
case ir_txf:
assert(!"GLSL 1.30 features unsupported");
inst = emit(FS_OPCODE_TXF, dst);
break;
}
inst->base_mrf = base_mrf;