On Friday, November 13, 2015 10:06:23 AM Pohjolainen, Topi wrote:
> On Thu, Nov 12, 2015 at 03:38:51PM -0800, Kenneth Graunke wrote:
> > I was going to add scalar_tcs and scalar_tes flags, and then thought
> > better of it and decided to convert this to an array. Simpler.
> >
> > Signed-off-by: Kenneth Graunke <kenn...@whitecape.org>
> > ---
> > src/mesa/drivers/dri/i965/brw_compiler.h | 3 +--
> > src/mesa/drivers/dri/i965/brw_context.c | 2 +-
> > src/mesa/drivers/dri/i965/brw_gs.c | 3 ++-
> > src/mesa/drivers/dri/i965/brw_link.cpp | 11 +++++---
> > src/mesa/drivers/dri/i965/brw_program.c | 3 ++-
> > src/mesa/drivers/dri/i965/brw_shader.cpp | 31
> > ++++++-----------------
> > src/mesa/drivers/dri/i965/brw_shader.h | 2 --
> > src/mesa/drivers/dri/i965/brw_vec4.cpp | 4 +--
> > src/mesa/drivers/dri/i965/brw_vec4_gs_visitor.cpp | 2 +-
> > src/mesa/drivers/dri/i965/brw_vs.c | 7 ++---
> > 10 files changed, 28 insertions(+), 40 deletions(-)
> >
> > diff --git a/src/mesa/drivers/dri/i965/brw_compiler.h
> > b/src/mesa/drivers/dri/i965/brw_compiler.h
> > index e3a26d6..3f54616 100644
> > --- a/src/mesa/drivers/dri/i965/brw_compiler.h
> > +++ b/src/mesa/drivers/dri/i965/brw_compiler.h
> > @@ -89,8 +89,7 @@ struct brw_compiler {
> > void (*shader_debug_log)(void *, const char *str, ...) PRINTFLIKE(2, 3);
> > void (*shader_perf_log)(void *, const char *str, ...) PRINTFLIKE(2, 3);
> >
> > - bool scalar_vs;
> > - bool scalar_gs;
> > + bool scalar_stage[MESA_SHADER_STAGES];
> > struct gl_shader_compiler_options
> > glsl_compiler_options[MESA_SHADER_STAGES];
> > };
> >
> > diff --git a/src/mesa/drivers/dri/i965/brw_context.c
> > b/src/mesa/drivers/dri/i965/brw_context.c
> > index ac6045d..2db99c7 100644
> > --- a/src/mesa/drivers/dri/i965/brw_context.c
> > +++ b/src/mesa/drivers/dri/i965/brw_context.c
> > @@ -525,7 +525,7 @@ brw_initialize_context_constants(struct brw_context
> > *brw)
> > ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxImageUniforms =
> > BRW_MAX_IMAGES;
> > ctx->Const.Program[MESA_SHADER_VERTEX].MaxImageUniforms =
> > - (brw->intelScreen->compiler->scalar_vs ? BRW_MAX_IMAGES : 0);
> > + (brw->intelScreen->compiler->scalar_stage[MESA_SHADER_VERTEX] ?
> > BRW_MAX_IMAGES : 0);
> > ctx->Const.Program[MESA_SHADER_COMPUTE].MaxImageUniforms =
> > BRW_MAX_IMAGES;
> > ctx->Const.MaxImageUnits = MAX_IMAGE_UNITS;
> > diff --git a/src/mesa/drivers/dri/i965/brw_gs.c
> > b/src/mesa/drivers/dri/i965/brw_gs.c
> > index ed0890f..ad5b242 100644
> > --- a/src/mesa/drivers/dri/i965/brw_gs.c
> > +++ b/src/mesa/drivers/dri/i965/brw_gs.c
> > @@ -87,7 +87,8 @@ brw_codegen_gs_prog(struct brw_context *brw,
> > prog_data.base.base.nr_image_params = gs->NumImages;
> >
> > brw_nir_setup_glsl_uniforms(gp->program.Base.nir, prog,
> > &gp->program.Base,
> > - &prog_data.base.base, compiler->scalar_gs);
> > + &prog_data.base.base,
> > +
> > compiler->scalar_stage[MESA_SHADER_GEOMETRY]);
> >
> > GLbitfield64 outputs_written = gp->program.Base.OutputsWritten;
> >
> > diff --git a/src/mesa/drivers/dri/i965/brw_link.cpp
> > b/src/mesa/drivers/dri/i965/brw_link.cpp
> > index 2991173..14421d4 100644
> > --- a/src/mesa/drivers/dri/i965/brw_link.cpp
> > +++ b/src/mesa/drivers/dri/i965/brw_link.cpp
> > @@ -66,12 +66,14 @@ brw_lower_packing_builtins(struct brw_context *brw,
> > gl_shader_stage shader_type,
> > exec_list *ir)
> > {
> > + const struct brw_compiler *compiler = brw->intelScreen->compiler;
> > +
> > int ops = LOWER_PACK_SNORM_2x16
> > | LOWER_UNPACK_SNORM_2x16
> > | LOWER_PACK_UNORM_2x16
> > | LOWER_UNPACK_UNORM_2x16;
> >
> > - if (is_scalar_shader_stage(brw->intelScreen->compiler, shader_type)) {
> > + if (compiler->scalar_stage[shader_type]) {
> > ops |= LOWER_UNPACK_UNORM_4x8
> > | LOWER_UNPACK_SNORM_4x8
> > | LOWER_PACK_UNORM_4x8
> > @@ -84,7 +86,7 @@ brw_lower_packing_builtins(struct brw_context *brw,
> > * lowering is needed. For SOA code, the Half2x16 ops must be
> > * scalarized.
> > */
> > - if (is_scalar_shader_stage(brw->intelScreen->compiler, shader_type))
> > {
> > + if (compiler->scalar_stage[shader_type]) {
> > ops |= LOWER_PACK_HALF_2x16_TO_SPLIT
> > | LOWER_UNPACK_HALF_2x16_TO_SPLIT;
> > }
> > @@ -103,6 +105,7 @@ process_glsl_ir(gl_shader_stage stage,
> > struct gl_shader *shader)
> > {
> > struct gl_context *ctx = &brw->ctx;
> > + const struct brw_compiler *compiler = brw->intelScreen->compiler;
> > const struct gl_shader_compiler_options *options =
> > &ctx->Const.ShaderCompilerOptions[shader->Stage];
> >
> > @@ -161,7 +164,7 @@ process_glsl_ir(gl_shader_stage stage,
> > do {
> > progress = false;
> >
> > - if (is_scalar_shader_stage(brw->intelScreen->compiler,
> > shader->Stage)) {
> > + if (compiler->scalar_stage[shader->Stage]) {
> > brw_do_channel_expressions(shader->ir);
> > brw_do_vector_splitting(shader->ir);
> > }
> > @@ -252,7 +255,7 @@ brw_link_shader(struct gl_context *ctx, struct
> > gl_shader_program *shProg)
> > brw_add_texrect_params(prog);
> >
> > prog->nir = brw_create_nir(brw, shProg, prog, (gl_shader_stage)
> > stage,
> > - is_scalar_shader_stage(compiler, stage));
> > + compiler->scalar_stage[stage]);
> >
> > _mesa_reference_program(ctx, &prog, NULL);
> > }
> > diff --git a/src/mesa/drivers/dri/i965/brw_program.c
> > b/src/mesa/drivers/dri/i965/brw_program.c
> > index 1ccfa1b..2297fa6 100644
> > --- a/src/mesa/drivers/dri/i965/brw_program.c
> > +++ b/src/mesa/drivers/dri/i965/brw_program.c
> > @@ -126,6 +126,7 @@ brwProgramStringNotify(struct gl_context *ctx,
> > struct gl_program *prog)
> > {
> > struct brw_context *brw = brw_context(ctx);
> > + const struct brw_compiler *compiler = brw->intelScreen->compiler;
> >
> > switch (target) {
> > case GL_FRAGMENT_PROGRAM_ARB: {
> > @@ -165,7 +166,7 @@ brwProgramStringNotify(struct gl_context *ctx,
> > brw_add_texrect_params(prog);
> >
> > prog->nir = brw_create_nir(brw, NULL, prog, MESA_SHADER_VERTEX,
> > - brw->intelScreen->compiler->scalar_vs);
> > +
> > compiler->scalar_stage[MESA_SHADER_VERTEX]);
> >
> > brw_vs_precompile(ctx, NULL, prog);
> > break;
> > diff --git a/src/mesa/drivers/dri/i965/brw_shader.cpp
> > b/src/mesa/drivers/dri/i965/brw_shader.cpp
> > index 1cf00f4..04cd6a8 100644
> > --- a/src/mesa/drivers/dri/i965/brw_shader.cpp
> > +++ b/src/mesa/drivers/dri/i965/brw_shader.cpp
> > @@ -72,22 +72,6 @@ shader_perf_log_mesa(void *data, const char *fmt, ...)
> > va_end(args);
> > }
> >
> > -bool
> > -is_scalar_shader_stage(const struct brw_compiler *compiler, int stage)
> > -{
> > - switch (stage) {
> > - case MESA_SHADER_FRAGMENT:
> > - case MESA_SHADER_COMPUTE:
> > - return true;
> > - case MESA_SHADER_GEOMETRY:
> > - return compiler->scalar_gs;
> > - case MESA_SHADER_VERTEX:
> > - return compiler->scalar_vs;
> > - default:
> > - return false;
> > - }
> > -}
> > -
> > struct brw_compiler *
> > brw_compiler_create(void *mem_ctx, const struct brw_device_info *devinfo)
> > {
> > @@ -100,11 +84,12 @@ brw_compiler_create(void *mem_ctx, const struct
> > brw_device_info *devinfo)
> > brw_fs_alloc_reg_sets(compiler);
> > brw_vec4_alloc_reg_set(compiler);
> >
> > - if (devinfo->gen >= 8 && !(INTEL_DEBUG & DEBUG_VEC4VS))
> > - compiler->scalar_vs = true;
> > -
> > - if (devinfo->gen >= 8 && brw_env_var_as_boolean("INTEL_SCALAR_GS",
> > false))
> > - compiler->scalar_gs = true;
> > + compiler->scalar_stage[MESA_SHADER_VERTEX] =
> > + devinfo->gen >= 8 && !(INTEL_DEBUG & DEBUG_VEC4VS);
> > + compiler->scalar_stage[MESA_SHADER_GEOMETRY] =
> > + devinfo->gen >= 8 && brw_env_var_as_boolean("INTEL_SCALAR_GS",
> > false);
> > + compiler->scalar_stage[MESA_SHADER_FRAGMENT] = true;
> > + compiler->scalar_stage[MESA_SHADER_COMPUTE] = true;
> >
> > nir_shader_compiler_options *nir_options =
> > rzalloc(compiler, nir_shader_compiler_options);
> > @@ -137,7 +122,7 @@ brw_compiler_create(void *mem_ctx, const struct
> > brw_device_info *devinfo)
> > compiler->glsl_compiler_options[i].EmitNoIndirectUniform = false;
> > compiler->glsl_compiler_options[i].LowerClipDistance = true;
> >
> > - bool is_scalar = is_scalar_shader_stage(compiler, i);
> > + bool is_scalar = compiler->scalar_stage[i];
>
> Okay this works because MESA_SHADER_VERTEX is defined as zero. Would it be
> clearer to write it out explicitly:
>
> bool is_scalar = compiler->scalar_stage[i] != MESA_SHADER_VERTEX;I'm confused, sorry. scalar_stage[] is an array of booleans. (scalar_stage[MESA_SHADER_VERTEX] == true) means that we're using SIMD8 mode for vertex shaders. We actually loop over MESA_SHADER_* enums all the time - they're explicitly designed to be 0..MESA_SHADER_COUNT so that you can do that.
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