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-rw-r--r--src/mesa/drivers/dri/i965/brw_curbe.c22
-rw-r--r--src/mesa/drivers/dri/i965/brw_vs.c4
-rw-r--r--src/mesa/drivers/dri/i965/brw_vs_emit.c133
-rw-r--r--src/mesa/drivers/dri/i965/gen6_vs_state.c24
4 files changed, 93 insertions, 90 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_curbe.c b/src/mesa/drivers/dri/i965/brw_curbe.c
index 7b823eb201..877b22fec1 100644
--- a/src/mesa/drivers/dri/i965/brw_curbe.c
+++ b/src/mesa/drivers/dri/i965/brw_curbe.c
@@ -242,21 +242,13 @@ static void prepare_constant_buffer(struct brw_context *brw)
GLuint offset = brw->curbe.vs_start * 16;
GLuint nr = brw->vs.prog_data->nr_params / 4;
- if (vp->use_const_buffer) {
- /* Load the subset of push constants that will get used when
- * we also have a pull constant buffer.
- */
- for (i = 0; i < vp->program.Base.Parameters->NumParameters; i++) {
- if (brw->vs.constant_map[i] != -1) {
- assert(brw->vs.constant_map[i] <= nr);
- memcpy(buf + offset + brw->vs.constant_map[i] * 4,
- vp->program.Base.Parameters->ParameterValues[i],
- 4 * sizeof(float));
- }
- }
- } else {
- for (i = 0; i < nr; i++) {
- memcpy(buf + offset + i * 4,
+ /* Load the subset of push constants that will get used when
+ * we also have a pull constant buffer.
+ */
+ for (i = 0; i < vp->program.Base.Parameters->NumParameters; i++) {
+ if (brw->vs.constant_map[i] != -1) {
+ assert(brw->vs.constant_map[i] <= nr);
+ memcpy(buf + offset + brw->vs.constant_map[i] * 4,
vp->program.Base.Parameters->ParameterValues[i],
4 * sizeof(float));
}
diff --git a/src/mesa/drivers/dri/i965/brw_vs.c b/src/mesa/drivers/dri/i965/brw_vs.c
index 4a41c7a517..59f270d675 100644
--- a/src/mesa/drivers/dri/i965/brw_vs.c
+++ b/src/mesa/drivers/dri/i965/brw_vs.c
@@ -99,8 +99,8 @@ static void do_vs_prog( struct brw_context *brw,
(void) ctx;
aux_size = sizeof(c.prog_data);
- if (c.vp->use_const_buffer)
- aux_size += c.vp->program.Base.Parameters->NumParameters;
+ /* constant_map */
+ aux_size += c.vp->program.Base.Parameters->NumParameters;
drm_intel_bo_unreference(brw->vs.prog_bo);
brw->vs.prog_bo = brw_upload_cache_with_auxdata(&brw->cache, BRW_VS_PROG,
diff --git a/src/mesa/drivers/dri/i965/brw_vs_emit.c b/src/mesa/drivers/dri/i965/brw_vs_emit.c
index 184452666a..e1a3f33393 100644
--- a/src/mesa/drivers/dri/i965/brw_vs_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_vs_emit.c
@@ -143,6 +143,8 @@ static void brw_vs_alloc_regs( struct brw_vs_compile *c )
GLuint i, reg = 0, mrf;
int attributes_in_vue;
int first_reladdr_output;
+ int max_constant;
+ int constant = 0;
/* Determine whether to use a real constant buffer or use a block
* of GRF registers for constants. The later is faster but only
@@ -181,62 +183,81 @@ static void brw_vs_alloc_regs( struct brw_vs_compile *c )
}
- /* Vertex program parameters from curbe:
+ /* Assign some (probably all) of the vertex program constants to
+ * the push constant buffer/CURBE.
+ *
+ * There's an obvious limit to the numer of push constants equal to
+ * the number of register available, and that number is smaller
+ * than the minimum maximum number of vertex program parameters, so
+ * support for pull constants is required if we overflow.
+ * Additionally, on gen6 the number of push constants is even
+ * lower.
+ *
+ * When there's relative addressing, we don't know what range of
+ * Mesa IR registers can be accessed. And generally, when relative
+ * addressing is used we also have too many constants to load them
+ * all as push constants. So, we'll just support relative
+ * addressing out of the pull constant buffers, and try to load as
+ * many statically-accessed constants into the push constant buffer
+ * as we can.
*/
- if (c->vp->use_const_buffer) {
- int max_constant = BRW_MAX_GRF - 20 - c->vp->program.Base.NumTemporaries;
- int constant = 0;
+ if (intel->gen >= 6) {
+ /* We can only load 32 regs of push constants. */
+ max_constant = 32 * 2 - c->key.nr_userclip;
+ } else {
+ max_constant = BRW_MAX_GRF - 20 - c->vp->program.Base.NumTemporaries;
+ }
- /* We've got more constants than we can load with the push
- * mechanism. This is often correlated with reladdr loads where
- * we should probably be using a pull mechanism anyway to avoid
- * excessive reading. However, the pull mechanism is slow in
- * general. So, we try to allocate as many non-reladdr-loaded
- * constants through the push buffer as we can before giving up.
- */
- memset(c->constant_map, -1, c->vp->program.Base.Parameters->NumParameters);
- for (i = 0;
- i < c->vp->program.Base.NumInstructions && constant < max_constant;
- i++) {
- struct prog_instruction *inst = &c->vp->program.Base.Instructions[i];
- int arg;
+ /* constant_map maps from ParameterValues[] index to index in the
+ * push constant buffer, or -1 if it's only in the pull constant
+ * buffer.
+ */
+ memset(c->constant_map, -1, c->vp->program.Base.Parameters->NumParameters);
+ for (i = 0;
+ i < c->vp->program.Base.NumInstructions && constant < max_constant;
+ i++) {
+ struct prog_instruction *inst = &c->vp->program.Base.Instructions[i];
+ int arg;
- for (arg = 0; arg < 3 && constant < max_constant; arg++) {
- if ((inst->SrcReg[arg].File != PROGRAM_STATE_VAR &&
- inst->SrcReg[arg].File != PROGRAM_CONSTANT &&
- inst->SrcReg[arg].File != PROGRAM_UNIFORM &&
- inst->SrcReg[arg].File != PROGRAM_ENV_PARAM &&
- inst->SrcReg[arg].File != PROGRAM_LOCAL_PARAM) ||
- inst->SrcReg[arg].RelAddr)
- continue;
+ for (arg = 0; arg < 3 && constant < max_constant; arg++) {
+ if (inst->SrcReg[arg].File != PROGRAM_STATE_VAR &&
+ inst->SrcReg[arg].File != PROGRAM_CONSTANT &&
+ inst->SrcReg[arg].File != PROGRAM_UNIFORM &&
+ inst->SrcReg[arg].File != PROGRAM_ENV_PARAM &&
+ inst->SrcReg[arg].File != PROGRAM_LOCAL_PARAM) {
+ continue;
+ }
- if (c->constant_map[inst->SrcReg[arg].Index] == -1) {
- c->constant_map[inst->SrcReg[arg].Index] = constant++;
- }
+ if (inst->SrcReg[arg].RelAddr) {
+ c->vp->use_const_buffer = GL_TRUE;
+ continue;
}
- }
- for (i = 0; i < constant; i++) {
- c->regs[PROGRAM_STATE_VAR][i] = stride( brw_vec4_grf(reg+i/2,
- (i%2) * 4),
- 0, 4, 1);
+ if (c->constant_map[inst->SrcReg[arg].Index] == -1) {
+ c->constant_map[inst->SrcReg[arg].Index] = constant++;
+ }
}
- reg += (constant + 1) / 2;
- c->prog_data.curb_read_length = reg - 1;
- /* XXX 0 causes a bug elsewhere... */
- c->prog_data.nr_params = MAX2(constant * 4, 4);
}
- else {
- /* use a section of the GRF for constants */
- GLuint nr_params = c->vp->program.Base.Parameters->NumParameters;
- for (i = 0; i < nr_params; i++) {
- c->regs[PROGRAM_STATE_VAR][i] = stride( brw_vec4_grf(reg+i/2, (i%2) * 4), 0, 4, 1);
- }
- reg += (nr_params + 1) / 2;
- c->prog_data.curb_read_length = reg - 1;
- c->prog_data.nr_params = nr_params * 4;
+ /* If we ran out of push constant space, then we'll also upload all
+ * constants through the pull constant buffer so that they can be
+ * accessed no matter what. For relative addressing (the common
+ * case) we need them all in place anyway.
+ */
+ if (constant == max_constant)
+ c->vp->use_const_buffer = GL_TRUE;
+
+ for (i = 0; i < constant; i++) {
+ c->regs[PROGRAM_STATE_VAR][i] = stride(brw_vec4_grf(reg + i / 2,
+ (i % 2) * 4),
+ 0, 4, 1);
}
+ reg += (constant + 1) / 2;
+ c->prog_data.curb_read_length = reg - 1;
+ c->prog_data.nr_params = constant;
+ /* XXX 0 causes a bug elsewhere... */
+ if (intel->gen < 6 && c->prog_data.nr_params == 0)
+ c->prog_data.nr_params = 4;
/* Allocate input regs:
*/
@@ -1302,22 +1323,18 @@ get_src_reg( struct brw_vs_compile *c,
case PROGRAM_UNIFORM:
case PROGRAM_ENV_PARAM:
case PROGRAM_LOCAL_PARAM:
- if (c->vp->use_const_buffer) {
- if (!relAddr && c->constant_map[index] != -1) {
- assert(c->regs[PROGRAM_STATE_VAR][c->constant_map[index]].nr != 0);
- return c->regs[PROGRAM_STATE_VAR][c->constant_map[index]];
- } else if (relAddr)
+ if (!relAddr && c->constant_map[index] != -1) {
+ /* Take from the push constant buffer if possible. */
+ assert(c->regs[PROGRAM_STATE_VAR][c->constant_map[index]].nr != 0);
+ return c->regs[PROGRAM_STATE_VAR][c->constant_map[index]];
+ } else {
+ /* Must be in the pull constant buffer then .*/
+ assert(c->vp->use_const_buffer);
+ if (relAddr)
return get_reladdr_constant(c, inst, argIndex);
else
return get_constant(c, inst, argIndex);
}
- else if (relAddr) {
- return deref(c, c->regs[PROGRAM_STATE_VAR][0], index, 16);
- }
- else {
- assert(c->regs[PROGRAM_STATE_VAR][index].nr != 0);
- return c->regs[PROGRAM_STATE_VAR][index];
- }
case PROGRAM_ADDRESS:
assert(index == 0);
return c->regs[file][index];
diff --git a/src/mesa/drivers/dri/i965/gen6_vs_state.c b/src/mesa/drivers/dri/i965/gen6_vs_state.c
index e94d0c0ddb..4ef9e2e607 100644
--- a/src/mesa/drivers/dri/i965/gen6_vs_state.c
+++ b/src/mesa/drivers/dri/i965/gen6_vs_state.c
@@ -54,7 +54,7 @@ upload_vs_state(struct brw_context *brw)
OUT_BATCH(0);
ADVANCE_BATCH();
} else {
- int params_uploaded = 0;
+ int params_uploaded = 0, param_regs;
float *param;
if (brw->vertex_program->IsNVProgram)
@@ -88,20 +88,11 @@ upload_vs_state(struct brw_context *brw)
params_uploaded++;
}
- if (vp->use_const_buffer) {
- for (i = 0; i < vp->program.Base.Parameters->NumParameters; i++) {
- if (brw->vs.constant_map[i] != -1) {
- memcpy(param + brw->vs.constant_map[i] * 4,
- vp->program.Base.Parameters->ParameterValues[i],
- 4 * sizeof(float));
- params_uploaded++;
- }
- }
- } else {
- for (i = 0; i < nr_params; i++) {
- memcpy(param, vp->program.Base.Parameters->ParameterValues[i],
+ for (i = 0; i < vp->program.Base.Parameters->NumParameters; i++) {
+ if (brw->vs.constant_map[i] != -1) {
+ memcpy(param + brw->vs.constant_map[i] * 4,
+ vp->program.Base.Parameters->ParameterValues[i],
4 * sizeof(float));
- param += 4;
params_uploaded++;
}
}
@@ -117,13 +108,16 @@ upload_vs_state(struct brw_context *brw)
drm_intel_gem_bo_unmap_gtt(constant_bo);
+ param_regs = (params_uploaded + 1) / 2;
+ assert(param_regs <= 32);
+
BEGIN_BATCH(5);
OUT_BATCH(CMD_3D_CONSTANT_VS_STATE << 16 |
GEN6_CONSTANT_BUFFER_0_ENABLE |
(5 - 2));
OUT_RELOC(constant_bo,
I915_GEM_DOMAIN_RENDER, 0, /* XXX: bad domain */
- ALIGN(params_uploaded, 2) / 2 - 1);
+ param_regs - 1);
OUT_BATCH(0);
OUT_BATCH(0);
OUT_BATCH(0);
generated by cgit v1.2.3 (git 2.51.0) at 2025-10-31 15:27:14 +0000