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

i965: Emit proper NOPs. 

The PRMs for HSW and newer say that other than the opcode and DebugCtrl
bits of the instruction word, the rest must be zero.

By zeroing the instruction word manually, we avoid using any of the
state inherited through brw_codegen.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96959
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
This commit is contained in:
Matt Turner 2016-12-03 20:14:55 -08:00
parent 9c95ad24cc
commit 43cdbb3e6a
1 changed files with 2 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
src/mesa/drivers/dri/i965/brw_eu_emit.c
View File

@ -1282,10 +1282,8 @@ brw_F16TO32(struct brw_codegen *p, struct brw_reg dst, struct brw_reg src)
void brw_NOP(struct brw_codegen *p)
{
brw_inst *insn = next_insn(p, BRW_OPCODE_NOP);
brw_inst_set_exec_size(p->devinfo, insn, BRW_EXECUTE_1);
brw_set_dest(p, insn, retype(brw_vec1_grf(0,0), BRW_REGISTER_TYPE_UD));
brw_set_src0(p, insn, retype(brw_vec1_grf(0,0), BRW_REGISTER_TYPE_UD));
brw_set_src1(p, insn, brw_imm_ud(0x0));
memset(insn, 0, sizeof(*insn));
brw_inst_set_opcode(p->devinfo, insn, BRW_OPCODE_NOP);
}