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i965/vs: implement ir_query_levels

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Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Chris Forbes 2013-09-27 05:52:20 +12:00
parent fa6440acdb
commit 4be21a07ea
1 changed files with 14 additions and 1 deletions
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15
src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
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@ -2192,6 +2192,10 @@ vec4_visitor::visit(ir_texture *ir)
lod = this->result;
lod_type = ir->lod_info.lod->type;
break;
case ir_query_levels:
lod = src_reg(0);
lod_type = glsl_type::int_type;
break;
case ir_txf_ms:
ir->lod_info.sample_index->accept(this);
sample_index = this->result;
@ -2232,6 +2236,8 @@ vec4_visitor::visit(ir_texture *ir)
break;
case ir_tg4:
inst = new(mem_ctx) vec4_instruction(this, SHADER_OPCODE_TG4);
case ir_query_levels:
inst = new(mem_ctx) vec4_instruction(this, SHADER_OPCODE_TXS);
break;
case ir_txb:
assert(!"TXB is not valid for vertex shaders.");
@ -2264,7 +2270,7 @@ vec4_visitor::visit(ir_texture *ir)
/* MRF for the first parameter */
int param_base = inst->base_mrf + inst->header_present;
if (ir->op == ir_txs) {
if (ir->op == ir_txs || ir->op == ir_query_levels) {
int writemask = brw->gen == 4 ? WRITEMASK_W : WRITEMASK_X;
emit(MOV(dst_reg(MRF, param_base, lod_type, writemask), lod));
} else {
@ -2415,6 +2421,13 @@ vec4_visitor::swizzle_result(ir_texture *ir, src_reg orig_val, int sampler)
this->result = src_reg(this, ir->type);
dst_reg swizzled_result(this->result);
if (ir->op == ir_query_levels) {
/* # levels is in .w */
orig_val.swizzle = BRW_SWIZZLE4(SWIZZLE_W, SWIZZLE_W, SWIZZLE_W, SWIZZLE_W);
emit(MOV(swizzled_result, orig_val));
return;
}
if (ir->op == ir_txs || ir->type == glsl_type::float_type
|| s == SWIZZLE_NOOP || ir->op == ir_tg4) {
emit(MOV(swizzled_result, orig_val));