[Mesa-dev] [PATCH 9/9] st/glsl_to_tgsi: fix block movs for doubles

[Dave Airlie]

From: Dave Airlie <airlied at redhat.com>

While playing with fp64, I disable varying packing to debug
something else, and noticed we never emitted half the output
movs for double matrix arrays.

We should be moving the left index two slots for dual
source doubles, and the right index two slots for non-vs
input doubles.

Signed-off-by: Dave Airlie <airlied at redhat.com>
---
 src/mesa/state_tracker/st_glsl_to_tgsi.cpp | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index 8331875..5036210 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -85,6 +85,7 @@ public:
       this->has_index2 = false;
       this->double_reg2 = false;
       this->array_id = 0;
+      this->is_double_vertex_input = false;
    }
 
    st_src_reg(gl_register_file file, int index, int type)
@@ -100,6 +101,7 @@ public:
       this->has_index2 = false;
       this->double_reg2 = false;
       this->array_id = 0;
+      this->is_double_vertex_input = false;
    }
 
    st_src_reg(gl_register_file file, int index, int type, int index2D)
@@ -115,6 +117,7 @@ public:
       this->has_index2 = false;
       this->double_reg2 = false;
       this->array_id = 0;
+      this->is_double_vertex_input = false;
    }
 
    st_src_reg()
@@ -130,6 +133,7 @@ public:
       this->has_index2 = false;
       this->double_reg2 = false;
       this->array_id = 0;
+      this->is_double_vertex_input = false;
    }
 
    explicit st_src_reg(st_dst_reg reg);
@@ -150,6 +154,7 @@ public:
     */
    bool double_reg2;
    unsigned array_id;
+   bool is_double_vertex_input;
 };
 
 class st_dst_reg {
@@ -224,6 +229,7 @@ st_src_reg::st_src_reg(st_dst_reg reg)
    this->has_index2 = reg.has_index2;
    this->double_reg2 = false;
    this->array_id = reg.array_id;
+   this->is_double_vertex_input = false;
 }
 
 st_dst_reg::st_dst_reg(st_src_reg reg)
@@ -2370,6 +2376,8 @@ glsl_to_tgsi_visitor::visit(ir_dereference_variable *ir)
 
    this->result = st_src_reg(entry->file, entry->index, var->type);
    this->result.array_id = entry->array_id;
+   if (this->shader->Stage == MESA_SHADER_VERTEX && var->data.mode == ir_var_shader_in && var->type->is_double())
+      this->result.is_double_vertex_input = true;
    if (!native_integers)
       this->result.type = GLSL_TYPE_FLOAT;
 }
@@ -2714,7 +2722,7 @@ glsl_to_tgsi_visitor::emit_block_mov(ir_assignment *ir, const struct glsl_type *
    if (type->is_matrix()) {
       const struct glsl_type *vec_type;
 
-      vec_type = glsl_type::get_instance(GLSL_TYPE_FLOAT,
+      vec_type = glsl_type::get_instance(type->is_double() ? GLSL_TYPE_DOUBLE : GLSL_TYPE_FLOAT,
                                          type->vector_elements, 1);
 
       for (int i = 0; i < type->matrix_columns; i++) {
@@ -2744,6 +2752,11 @@ glsl_to_tgsi_visitor::emit_block_mov(ir_assignment *ir, const struct glsl_type *
    }
    l->index++;
    r->index++;
+   if (type->is_dual_slot_double()) {
+      l->index++;
+      if (r->is_double_vertex_input == false)
+	 r->index++;
+   }
 }
 
 void
-- 
2.5.0