diff options
Diffstat (limited to 'src/mesa/drivers/dri')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_defines.h | 10 | ||||
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_shader.cpp | 2 | ||||
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_vec4.h | 2 | ||||
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_vec4_emit.cpp | 31 |
4 files changed, 45 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_defines.h b/src/mesa/drivers/dri/i965/brw_defines.h index ff270da1536..2e1285fec0a 100644 --- a/src/mesa/drivers/dri/i965/brw_defines.h +++ b/src/mesa/drivers/dri/i965/brw_defines.h @@ -833,6 +833,16 @@ enum opcode { * vec4_instruction::offset. */ GS_OPCODE_SET_WRITE_OFFSET, + + /** + * Set the "GS Number of Output Vertices for Slot {0,1}" fields of a + * URB_WRITE message header. + * + * - dst is the MRF containing the message header. + * + * - src0.x is the vertex count. The upper 16 bits will be ignored. + */ + GS_OPCODE_SET_VERTEX_COUNT, }; #define BRW_PREDICATE_NONE 0 diff --git a/src/mesa/drivers/dri/i965/brw_shader.cpp b/src/mesa/drivers/dri/i965/brw_shader.cpp index e5d939af24f..cec2d608209 100644 --- a/src/mesa/drivers/dri/i965/brw_shader.cpp +++ b/src/mesa/drivers/dri/i965/brw_shader.cpp @@ -503,6 +503,8 @@ brw_instruction_name(enum opcode op) return "gs_thread_end"; case GS_OPCODE_SET_WRITE_OFFSET: return "set_write_offset"; + case GS_OPCODE_SET_VERTEX_COUNT: + return "set_vertex_count"; default: /* Yes, this leaks. It's in debug code, it should never occur, and if diff --git a/src/mesa/drivers/dri/i965/brw_vec4.h b/src/mesa/drivers/dri/i965/brw_vec4.h index 484e5787e5d..730d6b72833 100644 --- a/src/mesa/drivers/dri/i965/brw_vec4.h +++ b/src/mesa/drivers/dri/i965/brw_vec4.h @@ -633,6 +633,8 @@ private: void generate_gs_set_write_offset(struct brw_reg dst, struct brw_reg src0, struct brw_reg src1); + void generate_gs_set_vertex_count(struct brw_reg dst, + struct brw_reg src); void generate_oword_dual_block_offsets(struct brw_reg m1, struct brw_reg index); void generate_scratch_write(vec4_instruction *inst, diff --git a/src/mesa/drivers/dri/i965/brw_vec4_emit.cpp b/src/mesa/drivers/dri/i965/brw_vec4_emit.cpp index c487ac85a23..11eeca144f5 100644 --- a/src/mesa/drivers/dri/i965/brw_vec4_emit.cpp +++ b/src/mesa/drivers/dri/i965/brw_vec4_emit.cpp @@ -475,6 +475,33 @@ vec4_generator::generate_gs_set_write_offset(struct brw_reg dst, } void +vec4_generator::generate_gs_set_vertex_count(struct brw_reg dst, + struct brw_reg src) +{ + brw_push_insn_state(p); + brw_set_access_mode(p, BRW_ALIGN_1); + brw_set_mask_control(p, BRW_MASK_DISABLE); + + /* If we think of the src and dst registers as composed of 8 DWORDs each, + * we want to pick up the contents of DWORDs 0 and 4 from src, truncate + * them to WORDs, and then pack them into DWORD 2 of dst. + * + * It's easier to get the EU to do this if we think of the src and dst + * registers as composed of 16 WORDS each; then, we want to pick up the + * contents of WORDs 0 and 8 from src, and pack them into WORDs 4 and 5 of + * dst. + * + * We can do that by the following EU instruction: + * + * mov (2) dst.4<1>:uw src<8;1,0>:uw { Align1, Q1, NoMask } + */ + brw_MOV(p, suboffset(stride(retype(dst, BRW_REGISTER_TYPE_UW), 2, 2, 1), 4), + stride(retype(src, BRW_REGISTER_TYPE_UW), 8, 1, 0)); + brw_set_access_mode(p, BRW_ALIGN_16); + brw_pop_insn_state(p); +} + +void vec4_generator::generate_oword_dual_block_offsets(struct brw_reg m1, struct brw_reg index) { @@ -954,6 +981,10 @@ vec4_generator::generate_vec4_instruction(vec4_instruction *instruction, generate_gs_set_write_offset(dst, src[0], src[1]); break; + case GS_OPCODE_SET_VERTEX_COUNT: + generate_gs_set_vertex_count(dst, src[0]); + break; + case SHADER_OPCODE_SHADER_TIME_ADD: brw_shader_time_add(p, src[0], SURF_INDEX_VS_SHADER_TIME); mark_surface_used(SURF_INDEX_VS_SHADER_TIME); |