[Mesa-dev] [PATCH V4 4/6] i965/fs: add generator support for pixel interpolator query

[Chris Forbes]

Signed-off-by: Chris Forbes <chrisf at ijw.co.nz>
---
 src/mesa/drivers/dri/i965/brw_defines.h        |  1 +
 src/mesa/drivers/dri/i965/brw_fs.cpp           |  2 ++
 src/mesa/drivers/dri/i965/brw_fs.h             |  4 ++++
 src/mesa/drivers/dri/i965/brw_fs_generator.cpp | 19 +++++++++++++++++++
 src/mesa/drivers/dri/i965/brw_shader.h         |  6 ++++++
 5 files changed, 32 insertions(+)

diff --git a/src/mesa/drivers/dri/i965/brw_defines.h b/src/mesa/drivers/dri/i965/brw_defines.h
index e528232..b4428c1 100644
--- a/src/mesa/drivers/dri/i965/brw_defines.h
+++ b/src/mesa/drivers/dri/i965/brw_defines.h
@@ -853,6 +853,7 @@ enum opcode {
    FS_OPCODE_UNPACK_HALF_2x16_SPLIT_X,
    FS_OPCODE_UNPACK_HALF_2x16_SPLIT_Y,
    FS_OPCODE_PLACEHOLDER_HALT,
+   FS_OPCODE_PIXEL_INTERPOLATOR_QUERY,
 
    VS_OPCODE_URB_WRITE,
    VS_OPCODE_PULL_CONSTANT_LOAD,
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index a3ad375..f431eff 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -370,6 +370,7 @@ fs_inst::is_send_from_grf() const
 {
    return (opcode == FS_OPCODE_VARYING_PULL_CONSTANT_LOAD_GEN7 ||
            opcode == SHADER_OPCODE_SHADER_TIME_ADD ||
+           opcode == FS_OPCODE_PIXEL_INTERPOLATOR_QUERY ||
            (opcode == FS_OPCODE_UNIFORM_PULL_CONSTANT_LOAD &&
             src[1].file == GRF) ||
            (is_tex() && src[0].file == GRF));
@@ -837,6 +838,7 @@ fs_visitor::implied_mrf_writes(fs_inst *inst)
       return 2;
    case SHADER_OPCODE_UNTYPED_ATOMIC:
    case SHADER_OPCODE_UNTYPED_SURFACE_READ:
+   case FS_OPCODE_PIXEL_INTERPOLATOR_QUERY:
       return 0;
    default:
       unreachable("not reached");
diff --git a/src/mesa/drivers/dri/i965/brw_fs.h b/src/mesa/drivers/dri/i965/brw_fs.h
index 537f10e..48f1069 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.h
+++ b/src/mesa/drivers/dri/i965/brw_fs.h
@@ -623,6 +623,10 @@ private:
                                                  struct brw_reg offset);
    void generate_mov_dispatch_to_flags(fs_inst *inst);
 
+   void generate_pixel_interpolator_query(fs_inst *inst,
+                                          struct brw_reg dst,
+                                          struct brw_reg src);
+
    void generate_set_omask(fs_inst *inst,
                            struct brw_reg dst,
                            struct brw_reg sample_mask);
diff --git a/src/mesa/drivers/dri/i965/brw_fs_generator.cpp b/src/mesa/drivers/dri/i965/brw_fs_generator.cpp
index eae55f0..fcc9a7d 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_generator.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_generator.cpp
@@ -995,6 +995,21 @@ fs_generator::generate_mov_dispatch_to_flags(fs_inst *inst)
    brw_pop_insn_state(p);
 }
 
+void
+fs_generator::generate_pixel_interpolator_query(fs_inst *inst,
+                                                struct brw_reg dst,
+                                                struct brw_reg src)
+{
+   brw_pixel_interpolator_query(p,
+         retype(dst, BRW_REGISTER_TYPE_UW),
+         src,
+         inst->pi_noperspective,
+         inst->pi_msg_type,
+         inst->pi_msg_data,
+         inst->mlen,
+         inst->regs_written);
+}
+
 
 static uint32_t brw_file_from_reg(fs_reg *reg)
 {
@@ -1730,6 +1745,10 @@ fs_generator::generate_code(exec_list *instructions)
          }
          break;
 
+      case FS_OPCODE_PIXEL_INTERPOLATOR_QUERY:
+         generate_pixel_interpolator_query(inst, dst, src[0]);
+         break;
+
       default:
 	 if (inst->opcode < (int) ARRAY_SIZE(opcode_descs)) {
 	    _mesa_problem(ctx, "Unsupported opcode `%s' in FS",
diff --git a/src/mesa/drivers/dri/i965/brw_shader.h b/src/mesa/drivers/dri/i965/brw_shader.h
index cfaea9e..6ccc148 100644
--- a/src/mesa/drivers/dri/i965/brw_shader.h
+++ b/src/mesa/drivers/dri/i965/brw_shader.h
@@ -112,6 +112,12 @@ struct backend_instruction {
    uint8_t mlen; /**< SEND message length */
    int8_t base_mrf; /**< First MRF in the SEND message, if mlen is nonzero. */
    uint8_t target; /**< MRT target. */
+   struct {
+         /* Descriptor parameters for pixel interpolator messages */
+         uint32_t pi_noperspective: 1;
+         uint32_t pi_msg_type: 3;
+         uint32_t pi_msg_data: 8;
+   };
 
    enum opcode opcode; /* BRW_OPCODE_* or FS_OPCODE_* */
    enum brw_conditional_mod conditional_mod; /**< BRW_CONDITIONAL_* */
-- 
2.0.1