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i965/fs: Reimplement emit_mcs_fetch() in terms of logical sends.

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Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Francisco Jerez 2015-07-17 18:23:31 +03:00
parent ba78a50071
commit 59979b133d
2 changed files with 15 additions and 24 deletions
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3
src/mesa/drivers/dri/i965/brw_fs.h
View file

@ -243,7 +243,8 @@ public:
uint32_t sampler,
fs_reg sampler_reg,
int texunit);
fs_reg emit_mcs_fetch(fs_reg coordinate, int components, fs_reg sampler);
fs_reg emit_mcs_fetch(const fs_reg &coordinate, unsigned components,
const fs_reg &sampler);
void emit_gen6_gather_wa(uint8_t wa, fs_reg dst);
void resolve_source_modifiers(fs_reg *src);
void emit_discard_jump();

36
src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
View file

@ -797,31 +797,21 @@ fs_visitor::rescale_texcoord(fs_reg coordinate, int coord_components,
/* Sample from the MCS surface attached to this multisample texture. */
fs_reg
fs_visitor::emit_mcs_fetch(fs_reg coordinate, int components, fs_reg sampler)
fs_visitor::emit_mcs_fetch(const fs_reg &coordinate, unsigned components,
const fs_reg &sampler)
{
int reg_width = dispatch_width / 8;
fs_reg payload = fs_reg(GRF, alloc.allocate(components * reg_width),
BRW_REGISTER_TYPE_F);
fs_reg dest = vgrf(glsl_type::uvec4_type);
fs_reg *sources = ralloc_array(mem_ctx, fs_reg, components);
const fs_reg dest = vgrf(glsl_type::uvec4_type);
const fs_reg srcs[] = {
coordinate, fs_reg(), fs_reg(), fs_reg(), fs_reg(), fs_reg(),
sampler, fs_reg(), fs_reg(components), fs_reg(0)
};
fs_inst *inst = bld.emit(SHADER_OPCODE_TXF_MCS_LOGICAL, dest, srcs,
ARRAY_SIZE(srcs));
/* parameters are: u, v, r; missing parameters are treated as zero */
for (int i = 0; i < components; i++) {
sources[i] = vgrf(glsl_type::float_type);
bld.MOV(retype(sources[i], BRW_REGISTER_TYPE_D), coordinate);
coordinate = offset(coordinate, bld, 1);
}
bld.LOAD_PAYLOAD(payload, sources, components, 0);
fs_inst *inst = bld.emit(SHADER_OPCODE_TXF_MCS, dest, payload, sampler);
inst->base_mrf = -1;
inst->mlen = components * reg_width;
inst->header_size = 0;
inst->regs_written = 4 * reg_width; /* we only care about one reg of
* response, but the sampler always
* writes 4/8
*/
/* We only care about one reg of response, but the sampler always writes
* 4/8.
*/
inst->regs_written = 4 * dispatch_width / 8;
return dest;
}