diff options
Diffstat (limited to 'src/mesa/drivers')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_fs.cpp | 61 | ||||
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_fs.h | 1 |
2 files changed, 42 insertions, 20 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp index b618ee5b157..d2947eee1f8 100644 --- a/src/mesa/drivers/dri/i965/brw_fs.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs.cpp @@ -534,25 +534,40 @@ fs_visitor::emit_general_interpolation(ir_variable *ir) continue; } - for (unsigned int c = 0; c < type->vector_elements; c++) { - struct brw_reg interp = interp_reg(location, c); - emit(fs_inst(FS_OPCODE_LINTERP, - attr, - this->delta_x, - this->delta_y, - fs_reg(interp))); - attr.reg_offset++; - } - - if (intel->gen < 6) { - attr.reg_offset -= type->vector_elements; + if (c->key.flat_shade && (location == FRAG_ATTRIB_COL0 || + location == FRAG_ATTRIB_COL1)) { + /* Constant interpolation (flat shading) case. The SF has + * handed us defined values in only the constant offset + * field of the setup reg. + */ for (unsigned int c = 0; c < type->vector_elements; c++) { - emit(fs_inst(BRW_OPCODE_MUL, - attr, + struct brw_reg interp = interp_reg(location, c); + interp = suboffset(interp, 3); + emit(fs_inst(FS_OPCODE_CINTERP, attr, fs_reg(interp))); + attr.reg_offset++; + } + } else { + /* Perspective interpolation case. */ + for (unsigned int c = 0; c < type->vector_elements; c++) { + struct brw_reg interp = interp_reg(location, c); + emit(fs_inst(FS_OPCODE_LINTERP, attr, - this->pixel_w)); + this->delta_x, + this->delta_y, + fs_reg(interp))); attr.reg_offset++; } + + if (intel->gen < 6) { + attr.reg_offset -= type->vector_elements; + for (unsigned int c = 0; c < type->vector_elements; c++) { + emit(fs_inst(BRW_OPCODE_MUL, + attr, + attr, + this->pixel_w)); + attr.reg_offset++; + } + } } location++; } @@ -2557,12 +2572,15 @@ fs_visitor::assign_urb_setup() foreach_iter(exec_list_iterator, iter, this->instructions) { fs_inst *inst = (fs_inst *)iter.get(); - if (inst->opcode != FS_OPCODE_LINTERP) - continue; - - assert(inst->src[2].file == FIXED_HW_REG); + if (inst->opcode == FS_OPCODE_LINTERP) { + assert(inst->src[2].file == FIXED_HW_REG); + inst->src[2].fixed_hw_reg.nr += urb_start; + } - inst->src[2].fixed_hw_reg.nr += urb_start; + if (inst->opcode == FS_OPCODE_CINTERP) { + assert(inst->src[0].file == FIXED_HW_REG); + inst->src[0].fixed_hw_reg.nr += urb_start; + } } this->first_non_payload_grf = urb_start + c->prog_data.urb_read_length; @@ -3501,6 +3519,9 @@ fs_visitor::generate_code() case FS_OPCODE_COS: generate_math(inst, dst, src); break; + case FS_OPCODE_CINTERP: + brw_MOV(p, dst, src[0]); + break; case FS_OPCODE_LINTERP: generate_linterp(inst, dst, src); break; diff --git a/src/mesa/drivers/dri/i965/brw_fs.h b/src/mesa/drivers/dri/i965/brw_fs.h index d213c62dcb7..82d96f6ac02 100644 --- a/src/mesa/drivers/dri/i965/brw_fs.h +++ b/src/mesa/drivers/dri/i965/brw_fs.h @@ -68,6 +68,7 @@ enum fs_opcodes { FS_OPCODE_COS, FS_OPCODE_DDX, FS_OPCODE_DDY, + FS_OPCODE_CINTERP, FS_OPCODE_LINTERP, FS_OPCODE_TEX, FS_OPCODE_TXB, |