diff options
Diffstat (limited to 'src/mesa/drivers/dri/i965/brw_fs_generator.cpp')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_fs_generator.cpp | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs_generator.cpp b/src/mesa/drivers/dri/i965/brw_fs_generator.cpp index bb7e792044f..b016b5684e7 100644 --- a/src/mesa/drivers/dri/i965/brw_fs_generator.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs_generator.cpp @@ -317,6 +317,14 @@ fs_generator::generate_fb_write(fs_inst *inst, struct brw_reg payload) brw_imm_ud(inst->target)); } + /* Set computes stencil to render target */ + if (prog_data->computed_stencil) { + brw_OR(p, + vec1(retype(payload, BRW_REGISTER_TYPE_UD)), + vec1(retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD)), + brw_imm_ud(0x1 << 14)); + } + implied_header = brw_null_reg(); } else { implied_header = retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UW); @@ -437,6 +445,47 @@ fs_generator::generate_cs_terminate(fs_inst *inst, struct brw_reg payload) } void +fs_generator::generate_stencil_ref_packing(fs_inst *inst, + struct brw_reg dst, + struct brw_reg src) +{ + assert(dispatch_width == 8); + assert(devinfo->gen >= 9); + + /* Stencil value updates are provided in 8 slots of 1 byte per slot. + * Presumably, in order to save memory bandwidth, the stencil reference + * values written from the FS need to be packed into 2 dwords (this makes + * sense because the stencil values are limited to 1 byte each and a SIMD8 + * send, so stencil slots 0-3 in dw0, and 4-7 in dw1.) + * + * The spec is confusing here because in the payload definition of MDP_RTW_S8 + * (Message Data Payload for Render Target Writes with Stencil 8b) the + * stencil value seems to be dw4.0-dw4.7. However, if you look at the type of + * dw4 it is type MDPR_STENCIL (Message Data Payload Register) which is the + * packed values specified above and diagrammed below: + * + * 31 0 + * -------------------------------- + * DW | | + * 2-7 | IGNORED | + * | | + * -------------------------------- + * DW1 | STC | STC | STC | STC | + * | slot7 | slot6 | slot5 | slot4| + * -------------------------------- + * DW0 | STC | STC | STC | STC | + * | slot3 | slot2 | slot1 | slot0| + * -------------------------------- + */ + + src.vstride = BRW_VERTICAL_STRIDE_4; + src.width = BRW_WIDTH_1; + src.hstride = BRW_HORIZONTAL_STRIDE_0; + assert(src.type == BRW_REGISTER_TYPE_UB); + brw_MOV(p, retype(dst, BRW_REGISTER_TYPE_UB), src); +} + +void fs_generator::generate_barrier(fs_inst *inst, struct brw_reg src) { brw_barrier(p, src); @@ -2182,6 +2231,10 @@ fs_generator::generate_code(const cfg_t *cfg, int dispatch_width) generate_barrier(inst, src[0]); break; + case FS_OPCODE_PACK_STENCIL_REF: + generate_stencil_ref_packing(inst, dst, src[0]); + break; + default: unreachable("Unsupported opcode"); |