On Mon, Apr 18, 2016 at 12:25:19AM -0700, Kenneth Graunke wrote:
> On Saturday, April 16, 2016 4:42:38 PM PDT Topi Pohjolainen wrote:
> > Signed-off-by: Topi Pohjolainen <topi.pohjolai...@intel.com>
> > ---
> > src/mesa/drivers/dri/i965/brw_blorp_blit.cpp | 2 +-
> > src/mesa/drivers/dri/i965/brw_blorp_blit_eu.cpp | 3 ++-
> > src/mesa/drivers/dri/i965/brw_blorp_blit_eu.h | 2 +-
> > src/mesa/drivers/dri/i965/brw_fs.h | 2 +-
> > src/mesa/drivers/dri/i965/brw_fs_generator.cpp | 11 +++++++----
> > 5 files changed, 12 insertions(+), 8 deletions(-)
> >
> > diff --git a/src/mesa/drivers/dri/i965/brw_blorp_blit.cpp b/src/mesa/
> drivers/dri/i965/brw_blorp_blit.cpp
> > index 5fd25f1..444ba26 100644
> > --- a/src/mesa/drivers/dri/i965/brw_blorp_blit.cpp
> > +++ b/src/mesa/drivers/dri/i965/brw_blorp_blit.cpp
> > @@ -1786,7 +1786,7 @@ brw_blorp_blit_program::render_target_write()
> > /* Now write to the render target and terminate the thread */
> > emit_render_target_write(
> > mrf_rt_write,
> > - base_mrf,
> > + brw->gen < 8 ? base_mrf : -1,
> > mrf_offset /* msg_length. TODO: Should be smaller for non-RGBA
> formats. */,
> > use_header);
> > }
> > diff --git a/src/mesa/drivers/dri/i965/brw_blorp_blit_eu.cpp b/src/mesa/
> drivers/dri/i965/brw_blorp_blit_eu.cpp
> > index fd23e23..3a5297c 100644
> > --- a/src/mesa/drivers/dri/i965/brw_blorp_blit_eu.cpp
> > +++ b/src/mesa/drivers/dri/i965/brw_blorp_blit_eu.cpp
> > @@ -96,13 +96,14 @@ brw_blorp_eu_emitter::emit_texture_lookup(const struct
> brw_reg &dst,
> >
> > void
> > brw_blorp_eu_emitter::emit_render_target_write(const struct brw_reg &src0,
> > - unsigned msg_reg_nr,
> > + int msg_reg_nr,
> > unsigned msg_length,
> > bool use_header)
> > {
> > fs_inst *inst = new (mem_ctx) fs_inst(FS_OPCODE_BLORP_FB_WRITE, 16);
> >
> > inst->src[0] = src0;
> > + inst->sources = 1;
> > inst->base_mrf = msg_reg_nr;
> > inst->mlen = msg_length;
> > inst->header_size = use_header ? 2 : 0;
> > diff --git a/src/mesa/drivers/dri/i965/brw_blorp_blit_eu.h b/src/mesa/
> drivers/dri/i965/brw_blorp_blit_eu.h
> > index 14a8e50..8ed6d6b 100644
> > --- a/src/mesa/drivers/dri/i965/brw_blorp_blit_eu.h
> > +++ b/src/mesa/drivers/dri/i965/brw_blorp_blit_eu.h
> > @@ -47,7 +47,7 @@ protected:
> > unsigned msg_length);
> >
> > void emit_render_target_write(const struct brw_reg &src0,
> > - unsigned msg_reg_nr,
> > + int msg_reg_nr,
> > unsigned msg_length,
> > bool use_header);
> >
> > diff --git a/src/mesa/drivers/dri/i965/brw_fs.h b/src/mesa/drivers/dri/i965/
> brw_fs.h
> > index 6afb9b6..775f665 100644
> > --- a/src/mesa/drivers/dri/i965/brw_fs.h
> > +++ b/src/mesa/drivers/dri/i965/brw_fs.h
> > @@ -448,7 +448,7 @@ private:
> > void generate_stencil_ref_packing(fs_inst *inst, struct brw_reg dst,
> > struct brw_reg src);
> > void generate_barrier(fs_inst *inst, struct brw_reg src);
> > - void generate_blorp_fb_write(fs_inst *inst);
> > + void generate_blorp_fb_write(fs_inst *inst, struct brw_reg payload);
> > void generate_linterp(fs_inst *inst, struct brw_reg dst,
> > struct brw_reg *src);
> > void generate_tex(fs_inst *inst, struct brw_reg dst, struct brw_reg src,
> > diff --git a/src/mesa/drivers/dri/i965/brw_fs_generator.cpp b/src/mesa/
> drivers/dri/i965/brw_fs_generator.cpp
> > index 851cccf..0d3c942 100644
> > --- a/src/mesa/drivers/dri/i965/brw_fs_generator.cpp
> > +++ b/src/mesa/drivers/dri/i965/brw_fs_generator.cpp
> > @@ -552,12 +552,15 @@ fs_generator::generate_barrier(fs_inst *inst, struct
> brw_reg src)
> > }
> >
> > void
> > -fs_generator::generate_blorp_fb_write(fs_inst *inst)
> > +fs_generator::generate_blorp_fb_write(fs_inst *inst, struct brw_reg
> payload)
> > {
> > brw_fb_WRITE(p,
> > 16 /* dispatch_width */,
> > - brw_message_reg(inst->base_mrf),
> > - brw_reg_from_fs_reg(inst, &inst->src[0], devinfo->gen),
> > + inst->base_mrf >= 0 ?
> > + brw_message_reg(inst->base_mrf) : vec8(payload),
>
> Is there some reason we need vec8() here?
>
> > + inst->header_size ?
> > + brw_reg_from_fs_reg(inst, &inst->src[0], devinfo->gen) :
>
> The existing code looks a bit fishy...this corresponds to brw_fb_WRITE's
> implied_header parameter, which is always ignored on Gen6+. BLORP only
> works on Gen6+. So this can't be right...is this code just pointless?
We have:
void
brw_blorp_blit_program::render_target_write()
{
struct brw_reg mrf_rt_write =
retype(vec16(brw_message_reg(base_mrf)), key->texture_data_type);
int mrf_offset = 0;
/* If we may have killed pixels, then we need to send R0 and R1 in a header
* so that the render target knows which pixels we killed.
*/
bool use_header = key->use_kill;
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