bool
brw_wm_do_compile(struct brw_context *brw,
struct brw_wm_compile *c)
{
struct gl_context *ctx = &brw->ctx;
struct gl_shader *fs = NULL;
if (c->shader_prog)
fs = c->shader_prog->_LinkedShaders[MESA_SHADER_FRAGMENT];
/* Allocate the references to the uniforms that will end up in the
* prog_data associated with the compiled program, and which will be freed
* by the state cache.
*/
int param_count;
if (fs) {
param_count = fs->num_uniform_components;
} else {
param_count = c->fp->program.Base.Parameters->NumParameters * 4;
}
/* The backend also sometimes adds params for texture size. */
param_count += 2 * ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits;
c->prog_data.base.param = rzalloc_array(NULL, const float *, param_count);
c->prog_data.base.pull_param =
rzalloc_array(NULL, const float *, param_count);
c->prog_data.base.nr_params = param_count;
c->prog_data.barycentric_interp_modes =
brw_compute_barycentric_interp_modes(brw, c->key.flat_shade,
c->key.persample_shading,
&c->fp->program);
c->program = brw_wm_fs_emit(brw, c,
&c->fp->program, c->shader_prog, &c->program_size);
if (c->program == NULL)
return false;
/* Scratch space is used for register spilling */
if (c->last_scratch) {
perf_debug("Fragment shader triggered register spilling. "
"Try reducing the number of live scalar values to "
"improve performance.\n");
c->prog_data.total_scratch = brw_get_scratch_size(c->last_scratch);
}
if (unlikely(INTEL_DEBUG & DEBUG_WM))
fprintf(stderr, "\n");
return true;
}
bool
brw_codegen_gs_prog(struct brw_context *brw,
struct gl_shader_program *prog,
struct brw_geometry_program *gp,
struct brw_gs_prog_key *key)
{
struct brw_stage_state *stage_state = &brw->gs.base;
struct brw_gs_compile c;
memset(&c, 0, sizeof(c));
c.key = *key;
c.gp = gp;
c.prog_data.include_primitive_id =
(gp->program.Base.InputsRead & VARYING_BIT_PRIMITIVE_ID) != 0;
c.prog_data.invocations = gp->program.Invocations;
/* Allocate the references to the uniforms that will end up in the
* prog_data associated with the compiled program, and which will be freed
* by the state cache.
*
* Note: param_count needs to be num_uniform_components * 4, since we add
* padding around uniform values below vec4 size, so the worst case is that
* every uniform is a float which gets padded to the size of a vec4.
*/
struct gl_shader *gs = prog->_LinkedShaders[MESA_SHADER_GEOMETRY];
int param_count = gs->num_uniform_components * 4;
/* We also upload clip plane data as uniforms */
param_count += MAX_CLIP_PLANES * 4;
c.prog_data.base.base.param =
rzalloc_array(NULL, const gl_constant_value *, param_count);
c.prog_data.base.base.pull_param =
rzalloc_array(NULL, const gl_constant_value *, param_count);
c.prog_data.base.base.nr_params = param_count;
if (brw->gen >= 7) {
if (gp->program.OutputType == GL_POINTS) {
/* When the output type is points, the geometry shader may output data
* to multiple streams, and EndPrimitive() has no effect. So we
* configure the hardware to interpret the control data as stream ID.
*/
c.prog_data.control_data_format = GEN7_GS_CONTROL_DATA_FORMAT_GSCTL_SID;
/* We only have to emit control bits if we are using streams */
if (prog->Geom.UsesStreams)
c.control_data_bits_per_vertex = 2;
else
c.control_data_bits_per_vertex = 0;
} else {
/* When the output type is triangle_strip or line_strip, EndPrimitive()
* may be used to terminate the current strip and start a new one
* (similar to primitive restart), and outputting data to multiple
* streams is not supported. So we configure the hardware to interpret
* the control data as EndPrimitive information (a.k.a. "cut bits").
*/
c.prog_data.control_data_format = GEN7_GS_CONTROL_DATA_FORMAT_GSCTL_CUT;
/* We only need to output control data if the shader actually calls
* EndPrimitive().
*/
c.control_data_bits_per_vertex = gp->program.UsesEndPrimitive ? 1 : 0;
}
} else {
/* There are no control data bits in gen6. */
c.control_data_bits_per_vertex = 0;
/* If it is using transform feedback, enable it */
if (prog->TransformFeedback.NumVarying)
c.prog_data.gen6_xfb_enabled = true;
else
c.prog_data.gen6_xfb_enabled = false;
}
c.control_data_header_size_bits =
gp->program.VerticesOut * c.control_data_bits_per_vertex;
/* 1 HWORD = 32 bytes = 256 bits */
c.prog_data.control_data_header_size_hwords =
ALIGN(c.control_data_header_size_bits, 256) / 256;
GLbitfield64 outputs_written = gp->program.Base.OutputsWritten;
/* In order for legacy clipping to work, we need to populate the clip
* distance varying slots whenever clipping is enabled, even if the vertex
* shader doesn't write to gl_ClipDistance.
*/
if (c.key.base.userclip_active) {
outputs_written |= BITFIELD64_BIT(VARYING_SLOT_CLIP_DIST0);
outputs_written |= BITFIELD64_BIT(VARYING_SLOT_CLIP_DIST1);
}
brw_compute_vue_map(brw->intelScreen->devinfo,
&c.prog_data.base.vue_map, outputs_written);
/* Compute the output vertex size.
*
* From the Ivy Bridge PRM, Vol2 Part1 7.2.1.1 STATE_GS - Output Vertex
* Size (p168):
*
* [0,62] indicating [1,63] 16B units
*
* Specifies the size of each vertex stored in the GS output entry
* (following any Control Header data) as a number of 128-bit units
* (minus one).
*
* Programming Restrictions: The vertex size must be programmed as a
* multiple of 32B units with the following exception: Rendering is
* disabled (as per SOL stage state) and the vertex size output by the
* GS thread is 16B.
*
* If rendering is enabled (as per SOL state) the vertex size must be
* programmed as a multiple of 32B units. In other words, the only time
* software can program a vertex size with an odd number of 16B units
* is when rendering is disabled.
*
* Note: B=bytes in the above text.
*
* It doesn't seem worth the extra trouble to optimize the case where the
* vertex size is 16B (especially since this would require special-casing
* the GEN assembly that writes to the URB). So we just set the vertex
* size to a multiple of 32B (2 vec4's) in all cases.
*
* The maximum output vertex size is 62*16 = 992 bytes (31 hwords). We
* budget that as follows:
*
* 512 bytes for varyings (a varying component is 4 bytes and
* gl_MaxGeometryOutputComponents = 128)
* 16 bytes overhead for VARYING_SLOT_PSIZ (each varying slot is 16
* bytes)
* 16 bytes overhead for gl_Position (we allocate it a slot in the VUE
* even if it's not used)
* 32 bytes overhead for gl_ClipDistance (we allocate it 2 VUE slots
* whenever clip planes are enabled, even if the shader doesn't
* write to gl_ClipDistance)
* 16 bytes overhead since the VUE size must be a multiple of 32 bytes
* (see below)--this causes up to 1 VUE slot to be wasted
* 400 bytes available for varying packing overhead
*
* Worst-case varying packing overhead is 3/4 of a varying slot (12 bytes)
* per interpolation type, so this is plenty.
*
*/
unsigned output_vertex_size_bytes = c.prog_data.base.vue_map.num_slots * 16;
assert(brw->gen == 6 ||
output_vertex_size_bytes <= GEN7_MAX_GS_OUTPUT_VERTEX_SIZE_BYTES);
c.prog_data.output_vertex_size_hwords =
ALIGN(output_vertex_size_bytes, 32) / 32;
/* Compute URB entry size. The maximum allowed URB entry size is 32k.
* That divides up as follows:
*
* 64 bytes for the control data header (cut indices or StreamID bits)
* 4096 bytes for varyings (a varying component is 4 bytes and
* gl_MaxGeometryTotalOutputComponents = 1024)
* 4096 bytes overhead for VARYING_SLOT_PSIZ (each varying slot is 16
* bytes/vertex and gl_MaxGeometryOutputVertices is 256)
* 4096 bytes overhead for gl_Position (we allocate it a slot in the VUE
* even if it's not used)
* 8192 bytes overhead for gl_ClipDistance (we allocate it 2 VUE slots
* whenever clip planes are enabled, even if the shader doesn't
* write to gl_ClipDistance)
* 4096 bytes overhead since the VUE size must be a multiple of 32
* bytes (see above)--this causes up to 1 VUE slot to be wasted
* 8128 bytes available for varying packing overhead
*
* Worst-case varying packing overhead is 3/4 of a varying slot per
* interpolation type, which works out to 3072 bytes, so this would allow
* us to accommodate 2 interpolation types without any danger of running
* out of URB space.
*
* In practice, the risk of running out of URB space is very small, since
* the above figures are all worst-case, and most of them scale with the
* number of output vertices. So we'll just calculate the amount of space
* we need, and if it's too large, fail to compile.
*
* The above is for gen7+ where we have a single URB entry that will hold
* all the output. In gen6, we will have to allocate URB entries for every
* vertex we emit, so our URB entries only need to be large enough to hold
* a single vertex. Also, gen6 does not have a control data header.
*/
unsigned output_size_bytes;
if (brw->gen >= 7) {
output_size_bytes =
c.prog_data.output_vertex_size_hwords * 32 * gp->program.VerticesOut;
output_size_bytes += 32 * c.prog_data.control_data_header_size_hwords;
} else {
output_size_bytes = c.prog_data.output_vertex_size_hwords * 32;
}
/* Broadwell stores "Vertex Count" as a full 8 DWord (32 byte) URB output,
* which comes before the control header.
*/
if (brw->gen >= 8)
output_size_bytes += 32;
assert(output_size_bytes >= 1);
int max_output_size_bytes = GEN7_MAX_GS_URB_ENTRY_SIZE_BYTES;
if (brw->gen == 6)
max_output_size_bytes = GEN6_MAX_GS_URB_ENTRY_SIZE_BYTES;
if (output_size_bytes > max_output_size_bytes)
return false;
/* URB entry sizes are stored as a multiple of 64 bytes in gen7+ and
* a multiple of 128 bytes in gen6.
*/
if (brw->gen >= 7)
c.prog_data.base.urb_entry_size = ALIGN(output_size_bytes, 64) / 64;
else
c.prog_data.base.urb_entry_size = ALIGN(output_size_bytes, 128) / 128;
c.prog_data.output_topology =
get_hw_prim_for_gl_prim(gp->program.OutputType);
brw_compute_vue_map(brw->intelScreen->devinfo,
&c.input_vue_map, c.key.input_varyings);
/* GS inputs are read from the VUE 256 bits (2 vec4's) at a time, so we
* need to program a URB read length of ceiling(num_slots / 2).
*/
c.prog_data.base.urb_read_length = (c.input_vue_map.num_slots + 1) / 2;
void *mem_ctx = ralloc_context(NULL);
unsigned program_size;
const unsigned *program =
brw_gs_emit(brw, prog, &c, mem_ctx, &program_size);
if (program == NULL) {
ralloc_free(mem_ctx);
return false;
}
/* Scratch space is used for register spilling */
if (c.base.last_scratch) {
perf_debug("Geometry shader triggered register spilling. "
"Try reducing the number of live vec4 values to "
"improve performance.\n");
c.prog_data.base.base.total_scratch
= brw_get_scratch_size(c.base.last_scratch*REG_SIZE);
brw_get_scratch_bo(brw, &stage_state->scratch_bo,
c.prog_data.base.base.total_scratch *
brw->max_gs_threads);
}
brw_upload_cache(&brw->cache, BRW_CACHE_GS_PROG,
&c.key, sizeof(c.key),
program, program_size,
&c.prog_data, sizeof(c.prog_data),
&stage_state->prog_offset, &brw->gs.prog_data);
ralloc_free(mem_ctx);
return true;
}
static bool
do_vs_prog(struct brw_context *brw,
struct gl_shader_program *prog,
struct brw_vertex_program *vp,
struct brw_vs_prog_key *key)
{
GLuint program_size;
const GLuint *program;
struct brw_vs_compile c;
struct brw_vs_prog_data prog_data;
void *mem_ctx;
int i;
struct gl_shader *vs = NULL;
if (prog)
vs = prog->_LinkedShaders[MESA_SHADER_VERTEX];
memset(&c, 0, sizeof(c));
memcpy(&c.key, key, sizeof(*key));
memset(&prog_data, 0, sizeof(prog_data));
mem_ctx = ralloc_context(NULL);
c.vp = vp;
/* Allocate the references to the uniforms that will end up in the
* prog_data associated with the compiled program, and which will be freed
* by the state cache.
*/
int param_count;
if (vs) {
/* We add padding around uniform values below vec4 size, with the worst
* case being a float value that gets blown up to a vec4, so be
* conservative here.
*/
param_count = vs->num_uniform_components * 4;
} else {
param_count = vp->program.Base.Parameters->NumParameters * 4;
}
/* We also upload clip plane data as uniforms */
param_count += MAX_CLIP_PLANES * 4;
prog_data.base.param = rzalloc_array(NULL, const float *, param_count);
prog_data.base.pull_param = rzalloc_array(NULL, const float *, param_count);
GLbitfield64 outputs_written = vp->program.Base.OutputsWritten;
prog_data.inputs_read = vp->program.Base.InputsRead;
if (c.key.copy_edgeflag) {
outputs_written |= BITFIELD64_BIT(VARYING_SLOT_EDGE);
prog_data.inputs_read |= VERT_BIT_EDGEFLAG;
}
if (brw->gen < 6) {
/* Put dummy slots into the VUE for the SF to put the replaced
* point sprite coords in. We shouldn't need these dummy slots,
* which take up precious URB space, but it would mean that the SF
* doesn't get nice aligned pairs of input coords into output
* coords, which would be a pain to handle.
*/
for (i = 0; i < 8; i++) {
if (c.key.point_coord_replace & (1 << i))
outputs_written |= BITFIELD64_BIT(VARYING_SLOT_TEX0 + i);
}
/* if back colors are written, allocate slots for front colors too */
if (outputs_written & BITFIELD64_BIT(VARYING_SLOT_BFC0))
outputs_written |= BITFIELD64_BIT(VARYING_SLOT_COL0);
if (outputs_written & BITFIELD64_BIT(VARYING_SLOT_BFC1))
outputs_written |= BITFIELD64_BIT(VARYING_SLOT_COL1);
}
brw_compute_vue_map(brw, &prog_data.base.vue_map, outputs_written,
c.key.base.userclip_active);
if (0) {
_mesa_fprint_program_opt(stdout, &c.vp->program.Base, PROG_PRINT_DEBUG,
true);
}
/* Emit GEN4 code.
*/
program = brw_vs_emit(brw, prog, &c, &prog_data, mem_ctx, &program_size);
if (program == NULL) {
ralloc_free(mem_ctx);
return false;
}
if (prog_data.base.nr_pull_params)
prog_data.base.num_surfaces = 1;
if (c.vp->program.Base.SamplersUsed)
prog_data.base.num_surfaces = SURF_INDEX_VS_TEXTURE(BRW_MAX_TEX_UNIT);
if (prog &&
prog->_LinkedShaders[MESA_SHADER_VERTEX]->NumUniformBlocks) {
prog_data.base.num_surfaces =
SURF_INDEX_VS_UBO(prog->_LinkedShaders[MESA_SHADER_VERTEX]->NumUniformBlocks);
}
/* Scratch space is used for register spilling */
if (c.base.last_scratch) {
perf_debug("Vertex shader triggered register spilling. "
"Try reducing the number of live vec4 values to "
"improve performance.\n");
prog_data.base.total_scratch
= brw_get_scratch_size(c.base.last_scratch*REG_SIZE);
brw_get_scratch_bo(brw, &brw->vs.scratch_bo,
prog_data.base.total_scratch * brw->max_vs_threads);
}
brw_upload_cache(&brw->cache, BRW_VS_PROG,
&c.key, sizeof(c.key),
program, program_size,
&prog_data, sizeof(prog_data),
&brw->vs.prog_offset, &brw->vs.prog_data);
ralloc_free(mem_ctx);
return true;
}
static bool
brw_vs_do_compile(struct brw_context *brw,
struct brw_vs_compile *c)
{
struct brw_stage_prog_data *stage_prog_data = &c->prog_data.base.base;
struct gl_shader *vs = NULL;
int i;
if (c->base.shader_prog)
vs = c->base.shader_prog->_LinkedShaders[MESA_SHADER_VERTEX];
/* Allocate the references to the uniforms that will end up in the
* prog_data associated with the compiled program, and which will be freed
* by the state cache.
*/
int param_count;
if (vs) {
/* We add padding around uniform values below vec4 size, with the worst
* case being a float value that gets blown up to a vec4, so be
* conservative here.
*/
param_count = vs->num_uniform_components * 4;
} else {
param_count = c->vp->program.Base.Parameters->NumParameters * 4;
}
/* vec4_visitor::setup_uniform_clipplane_values() also uploads user clip
* planes as uniforms.
*/
param_count += c->key.base.nr_userclip_plane_consts * 4;
stage_prog_data->param = rzalloc_array(NULL, const float *, param_count);
stage_prog_data->pull_param = rzalloc_array(NULL, const float *, param_count);
/* Setting nr_params here NOT to the size of the param and pull_param
* arrays, but to the number of uniform components vec4_visitor
* needs. vec4_visitor::setup_uniforms() will set it back to a proper value.
*/
stage_prog_data->nr_params = ALIGN(param_count, 4) / 4;
if (vs) {
stage_prog_data->nr_params += vs->num_samplers;
}
GLbitfield64 outputs_written = c->vp->program.Base.OutputsWritten;
c->prog_data.inputs_read = c->vp->program.Base.InputsRead;
if (c->key.copy_edgeflag) {
outputs_written |= BITFIELD64_BIT(VARYING_SLOT_EDGE);
c->prog_data.inputs_read |= VERT_BIT_EDGEFLAG;
}
if (brw->gen < 6) {
/* Put dummy slots into the VUE for the SF to put the replaced
* point sprite coords in. We shouldn't need these dummy slots,
* which take up precious URB space, but it would mean that the SF
* doesn't get nice aligned pairs of input coords into output
* coords, which would be a pain to handle.
*/
for (i = 0; i < 8; i++) {
if (c->key.point_coord_replace & (1 << i))
outputs_written |= BITFIELD64_BIT(VARYING_SLOT_TEX0 + i);
}
/* if back colors are written, allocate slots for front colors too */
if (outputs_written & BITFIELD64_BIT(VARYING_SLOT_BFC0))
outputs_written |= BITFIELD64_BIT(VARYING_SLOT_COL0);
if (outputs_written & BITFIELD64_BIT(VARYING_SLOT_BFC1))
outputs_written |= BITFIELD64_BIT(VARYING_SLOT_COL1);
}
/* In order for legacy clipping to work, we need to populate the clip
* distance varying slots whenever clipping is enabled, even if the vertex
* shader doesn't write to gl_ClipDistance.
*/
if (c->key.base.userclip_active) {
outputs_written |= BITFIELD64_BIT(VARYING_SLOT_CLIP_DIST0);
outputs_written |= BITFIELD64_BIT(VARYING_SLOT_CLIP_DIST1);
}
brw_compute_vue_map(brw, &c->prog_data.base.vue_map, outputs_written);
if (0) {
_mesa_fprint_program_opt(stderr, &c->vp->program.Base, PROG_PRINT_DEBUG,
true);
}
/* Emit GEN4 code.
*/
c->base.program = brw_vs_emit(brw, c->base.shader_prog, c,
&c->prog_data, c->base.mem_ctx, &c->base.program_size);
if (c->base.program == NULL)
return false;
if (c->base.last_scratch) {
c->prog_data.base.total_scratch
= brw_get_scratch_size(c->base.last_scratch*REG_SIZE);
}
return true;
}
/**
* All Mesa program -> GPU code generation goes through this function.
* Depending on the instructions used (i.e. flow control instructions)
* we'll use one of two code generators.
*/
bool do_wm_prog(struct brw_context *brw,
struct gl_shader_program *prog,
struct brw_fragment_program *fp,
struct brw_wm_prog_key *key)
{
struct brw_wm_compile *c;
const GLuint *program;
struct gl_shader *fs = NULL;
GLuint program_size;
if (prog)
fs = prog->_LinkedShaders[MESA_SHADER_FRAGMENT];
c = rzalloc(NULL, struct brw_wm_compile);
/* Allocate the references to the uniforms that will end up in the
* prog_data associated with the compiled program, and which will be freed
* by the state cache.
*/
int param_count;
if (fs) {
param_count = fs->num_uniform_components;
} else {
param_count = fp->program.Base.Parameters->NumParameters * 4;
}
/* The backend also sometimes adds params for texture size. */
param_count += 2 * BRW_MAX_TEX_UNIT;
c->prog_data.param = rzalloc_array(NULL, const float *, param_count);
c->prog_data.pull_param = rzalloc_array(NULL, const float *, param_count);
memcpy(&c->key, key, sizeof(*key));
c->prog_data.barycentric_interp_modes =
brw_compute_barycentric_interp_modes(brw, c->key.flat_shade,
&fp->program);
program = brw_wm_fs_emit(brw, c, &fp->program, prog, &program_size);
if (program == NULL)
return false;
/* Scratch space is used for register spilling */
if (c->last_scratch) {
perf_debug("Fragment shader triggered register spilling. "
"Try reducing the number of live scalar values to "
"improve performance.\n");
c->prog_data.total_scratch = brw_get_scratch_size(c->last_scratch);
brw_get_scratch_bo(brw, &brw->wm.scratch_bo,
c->prog_data.total_scratch * brw->max_wm_threads);
}
if (unlikely(INTEL_DEBUG & DEBUG_WM))
fprintf(stderr, "\n");
brw_upload_cache(&brw->cache, BRW_WM_PROG,
&c->key, sizeof(c->key),
program, program_size,
&c->prog_data, sizeof(c->prog_data),
&brw->wm.prog_offset, &brw->wm.prog_data);
ralloc_free(c);
return true;
}
static bool
do_vs_prog(struct brw_context *brw,
struct gl_shader_program *prog,
struct brw_vertex_program *vp,
struct brw_vs_prog_key *key)
{
struct gl_context *ctx = &brw->intel.ctx;
struct intel_context *intel = &brw->intel;
GLuint program_size;
const GLuint *program;
struct brw_vs_compile c;
void *mem_ctx;
int aux_size;
int i;
struct gl_shader *vs = NULL;
if (prog)
vs = prog->_LinkedShaders[MESA_SHADER_VERTEX];
memset(&c, 0, sizeof(c));
memcpy(&c.key, key, sizeof(*key));
mem_ctx = ralloc_context(NULL);
brw_init_compile(brw, &c.func, mem_ctx);
c.vp = vp;
/* Allocate the references to the uniforms that will end up in the
* prog_data associated with the compiled program, and which will be freed
* by the state cache.
*/
int param_count;
if (vs) {
/* We add padding around uniform values below vec4 size, with the worst
* case being a float value that gets blown up to a vec4, so be
* conservative here.
*/
param_count = vs->num_uniform_components * 4;
/* We also upload clip plane data as uniforms */
param_count += MAX_CLIP_PLANES * 4;
} else {
param_count = vp->program.Base.Parameters->NumParameters * 4;
}
c.prog_data.param = rzalloc_array(NULL, const float *, param_count);
c.prog_data.pull_param = rzalloc_array(NULL, const float *, param_count);
c.prog_data.outputs_written = vp->program.Base.OutputsWritten;
c.prog_data.inputs_read = vp->program.Base.InputsRead;
if (c.key.copy_edgeflag) {
c.prog_data.outputs_written |= BITFIELD64_BIT(VERT_RESULT_EDGE);
c.prog_data.inputs_read |= VERT_BIT_EDGEFLAG;
}
/* Put dummy slots into the VUE for the SF to put the replaced
* point sprite coords in. We shouldn't need these dummy slots,
* which take up precious URB space, but it would mean that the SF
* doesn't get nice aligned pairs of input coords into output
* coords, which would be a pain to handle.
*/
for (i = 0; i < 8; i++) {
if (c.key.point_coord_replace & (1 << i))
c.prog_data.outputs_written |= BITFIELD64_BIT(VERT_RESULT_TEX0 + i);
}
brw_compute_vue_map(&c);
if (0) {
_mesa_fprint_program_opt(stdout, &c.vp->program.Base, PROG_PRINT_DEBUG,
true);
}
/* Emit GEN4 code.
*/
if (prog) {
if (!brw_vs_emit(prog, &c)) {
ralloc_free(mem_ctx);
return false;
}
} else {
brw_old_vs_emit(&c);
}
if (c.prog_data.nr_pull_params)
c.prog_data.num_surfaces = 1;
if (c.vp->program.Base.SamplersUsed)
c.prog_data.num_surfaces = SURF_INDEX_VS_TEXTURE(BRW_MAX_TEX_UNIT);
if (prog &&
prog->_LinkedShaders[MESA_SHADER_VERTEX]->NumUniformBlocks) {
c.prog_data.num_surfaces =
SURF_INDEX_VS_UBO(prog->_LinkedShaders[MESA_SHADER_VERTEX]->NumUniformBlocks);
}
/* Scratch space is used for register spilling */
if (c.last_scratch) {
perf_debug("Vertex shader triggered register spilling. "
"Try reducing the number of live vec4 values to "
"improve performance.\n");
c.prog_data.total_scratch = brw_get_scratch_size(c.last_scratch);
brw_get_scratch_bo(intel, &brw->vs.scratch_bo,
c.prog_data.total_scratch * brw->max_vs_threads);
}
/* get the program
*/
program = brw_get_program(&c.func, &program_size);
/* We upload from &c.prog_data including the constant_map assuming
* they're packed together. It would be nice to have a
* compile-time assert macro here.
*/
assert(c.constant_map == (int8_t *)&c.prog_data +
sizeof(c.prog_data));
assert(ctx->Const.VertexProgram.MaxNativeParameters ==
ARRAY_SIZE(c.constant_map));
(void) ctx;
aux_size = sizeof(c.prog_data);
/* constant_map */
aux_size += c.vp->program.Base.Parameters->NumParameters;
brw_upload_cache(&brw->cache, BRW_VS_PROG,
&c.key, sizeof(c.key),
program, program_size,
&c.prog_data, aux_size,
&brw->vs.prog_offset, &brw->vs.prog_data);
ralloc_free(mem_ctx);
return true;
}
static bool
do_vs_prog(struct brw_context *brw,
struct gl_shader_program *prog,
struct brw_vertex_program *vp,
struct brw_vs_prog_key *key)
{
GLuint program_size;
const GLuint *program;
struct brw_vs_compile c;
struct brw_vs_prog_data prog_data;
struct brw_stage_prog_data *stage_prog_data = &prog_data.base.base;
void *mem_ctx;
int i;
struct gl_shader *vs = NULL;
if (prog)
vs = prog->_LinkedShaders[MESA_SHADER_VERTEX];
memset(&c, 0, sizeof(c));
memcpy(&c.key, key, sizeof(*key));
memset(&prog_data, 0, sizeof(prog_data));
mem_ctx = ralloc_context(NULL);
c.vp = vp;
/* Allocate the references to the uniforms that will end up in the
* prog_data associated with the compiled program, and which will be freed
* by the state cache.
*/
int param_count;
if (vs) {
/* We add padding around uniform values below vec4 size, with the worst
* case being a float value that gets blown up to a vec4, so be
* conservative here.
*/
param_count = vs->num_uniform_components * 4;
} else {
param_count = vp->program.Base.Parameters->NumParameters * 4;
}
/* vec4_visitor::setup_uniform_clipplane_values() also uploads user clip
* planes as uniforms.
*/
param_count += c.key.base.nr_userclip_plane_consts * 4;
stage_prog_data->param = rzalloc_array(NULL, const float *, param_count);
stage_prog_data->pull_param = rzalloc_array(NULL, const float *, param_count);
/* Setting nr_params here NOT to the size of the param and pull_param
* arrays, but to the number of uniform components vec4_visitor
* needs. vec4_visitor::setup_uniforms() will set it back to a proper value.
*/
stage_prog_data->nr_params = ALIGN(param_count, 4) / 4;
if (vs) {
stage_prog_data->nr_params += vs->num_samplers;
}
GLbitfield64 outputs_written = vp->program.Base.OutputsWritten;
prog_data.inputs_read = vp->program.Base.InputsRead;
if (c.key.copy_edgeflag) {
outputs_written |= BITFIELD64_BIT(VARYING_SLOT_EDGE);
prog_data.inputs_read |= VERT_BIT_EDGEFLAG;
}
if (brw->gen < 6) {
/* Put dummy slots into the VUE for the SF to put the replaced
* point sprite coords in. We shouldn't need these dummy slots,
* which take up precious URB space, but it would mean that the SF
* doesn't get nice aligned pairs of input coords into output
* coords, which would be a pain to handle.
*/
for (i = 0; i < 8; i++) {
if (c.key.point_coord_replace & (1 << i))
outputs_written |= BITFIELD64_BIT(VARYING_SLOT_TEX0 + i);
}
/* if back colors are written, allocate slots for front colors too */
if (outputs_written & BITFIELD64_BIT(VARYING_SLOT_BFC0))
outputs_written |= BITFIELD64_BIT(VARYING_SLOT_COL0);
if (outputs_written & BITFIELD64_BIT(VARYING_SLOT_BFC1))
outputs_written |= BITFIELD64_BIT(VARYING_SLOT_COL1);
}
/* In order for legacy clipping to work, we need to populate the clip
* distance varying slots whenever clipping is enabled, even if the vertex
* shader doesn't write to gl_ClipDistance.
*/
if (c.key.base.userclip_active) {
outputs_written |= BITFIELD64_BIT(VARYING_SLOT_CLIP_DIST0);
outputs_written |= BITFIELD64_BIT(VARYING_SLOT_CLIP_DIST1);
}
brw_compute_vue_map(brw, &prog_data.base.vue_map, outputs_written);
if (0) {
_mesa_fprint_program_opt(stderr, &c.vp->program.Base, PROG_PRINT_DEBUG,
true);
}
/* Emit GEN4 code.
*/
program = brw_vs_emit(brw, prog, &c, &prog_data, mem_ctx, &program_size);
if (program == NULL) {
ralloc_free(mem_ctx);
return false;
}
/* Scratch space is used for register spilling */
if (c.base.last_scratch) {
perf_debug("Vertex shader triggered register spilling. "
"Try reducing the number of live vec4 values to "
"improve performance.\n");
prog_data.base.total_scratch
= brw_get_scratch_size(c.base.last_scratch*REG_SIZE);
brw_get_scratch_bo(brw, &brw->vs.base.scratch_bo,
prog_data.base.total_scratch * brw->max_vs_threads);
}
brw_upload_cache(&brw->cache, BRW_VS_PROG,
&c.key, sizeof(c.key),
program, program_size,
&prog_data, sizeof(prog_data),
&brw->vs.base.prog_offset, &brw->vs.prog_data);
ralloc_free(mem_ctx);
return true;
}