KonstantinSeurer
/
mesa
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

i965: Use the spill destination for the message header on GEN >= 7 

Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>
This commit is contained in:
Jason Ekstrand 2014-10-24 12:22:04 -07:00
parent 76bb695f09
commit 4242eb14c1
1 changed files with 13 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
src/mesa/drivers/dri/i965/brw_eu_emit.c
View File

@ -2099,7 +2099,18 @@ brw_oword_block_read_scratch(struct brw_compile *p,
if (brw->gen >= 6)
offset /= 16;
mrf = retype(mrf, BRW_REGISTER_TYPE_UD);
if (p->brw->gen >= 7) {
/* On gen 7 and above, we no longer have message registers and we can
* send from any register we want. By using the destination register
* for the message, we guarantee that the implied message write won't
* accidentally overwrite anything. This has been a problem because
* the MRF registers and source for the final FB write are both fixed
* and may overlap.
*/
mrf = retype(dest, BRW_REGISTER_TYPE_UD);
} else {
mrf = retype(mrf, BRW_REGISTER_TYPE_UD);
}
dest = retype(dest, BRW_REGISTER_TYPE_UW);
if (num_regs == 1) {
@ -2118,11 +2129,7 @@ brw_oword_block_read_scratch(struct brw_compile *p,
brw_MOV(p, mrf, retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD));
/* set message header global offset field (reg 0, element 2) */
brw_MOV(p,
retype(brw_vec1_reg(BRW_MESSAGE_REGISTER_FILE,
mrf.nr,
2), BRW_REGISTER_TYPE_UD),
brw_imm_ud(offset));
brw_MOV(p, get_element_ud(mrf, 2), brw_imm_ud(offset));
brw_pop_insn_state(p);
}