diff options
| author | Eric Anholt <eric@anholt.net> | 2010-10-25 11:23:13 -0700 |
|---|---|---|
| committer | Eric Anholt <eric@anholt.net> | 2010-10-26 10:34:10 -0700 |
| commit | 3789d5025a3200c40a39119c94c3d38a13e4b65a (patch) | |
| tree | 3c52e5f7ed71ad7db433849d526edc6edd8b3a21 /src/mesa/drivers/dri/i965/brw_eu_emit.c | |
| parent | 547e7619aac74ae13bdaa7fdf403a4ceb5212467 (diff) | |
i965: Add EU code for dword scattered reads (constant buffer array indexing).
Diffstat (limited to 'src/mesa/drivers/dri/i965/brw_eu_emit.c')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_eu_emit.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_eu_emit.c b/src/mesa/drivers/dri/i965/brw_eu_emit.c index fe3a029992..feb13e7ae4 100644 --- a/src/mesa/drivers/dri/i965/brw_eu_emit.c +++ b/src/mesa/drivers/dri/i965/brw_eu_emit.c @@ -1566,6 +1566,46 @@ void brw_oword_block_read(struct brw_compile *p, brw_pop_insn_state(p); } +/** + * Read a set of dwords from the data port Data Cache (const buffer). + * + * Location (in buffer) appears as UD offsets in the register after + * the provided mrf header reg. + */ +void brw_dword_scattered_read(struct brw_compile *p, + struct brw_reg dest, + struct brw_reg mrf, + uint32_t bind_table_index) +{ + mrf = retype(mrf, BRW_REGISTER_TYPE_UD); + + brw_push_insn_state(p); + brw_set_predicate_control(p, BRW_PREDICATE_NONE); + brw_set_compression_control(p, BRW_COMPRESSION_NONE); + brw_set_mask_control(p, BRW_MASK_DISABLE); + brw_MOV(p, mrf, retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD)); + brw_pop_insn_state(p); + + struct brw_instruction *insn = next_insn(p, BRW_OPCODE_SEND); + insn->header.destreg__conditionalmod = mrf.nr; + + /* cast dest to a uword[8] vector */ + dest = retype(vec8(dest), BRW_REGISTER_TYPE_UW); + + brw_set_dest(insn, dest); + brw_set_src0(insn, brw_null_reg()); + + brw_set_dp_read_message(p->brw, + insn, + bind_table_index, + BRW_DATAPORT_DWORD_SCATTERED_BLOCK_8DWORDS, + BRW_DATAPORT_READ_MESSAGE_DWORD_SCATTERED_READ, + 0, /* source cache = data cache */ + 2, /* msg_length */ + 1, /* response_length */ + 0); /* eot */ +} + /** |