There is a jumpi in long DIV/REM, with predication is any16/any8. So MUST AND the predication register with emask, otherwise may dead loop.
Signed-off-by: Yang Rong <[email protected]> --- backend/src/backend/gen_context.cpp | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/backend/src/backend/gen_context.cpp b/backend/src/backend/gen_context.cpp index 7a74856..44dbee2 100644 --- a/backend/src/backend/gen_context.cpp +++ b/backend/src/backend/gen_context.cpp @@ -1364,6 +1364,7 @@ namespace gbe GenRegister l = ra->genReg(insn.dst(12)); GenRegister m = ra->genReg(insn.dst(13)); GenRegister flagReg = checkFlagRegister(ra->genReg(insn.dst(14))); + GenRegister emaskReg = ra->genReg(GenRegister::uw1grf(ir::ocl::emask)); GenRegister zero = GenRegister::immud(0), one = GenRegister::immud(1), imm31 = GenRegister::immud(31); @@ -1445,6 +1446,11 @@ namespace gbe p->curr.predicate = GEN_PREDICATE_NONE; p->curr.useFlag(flagReg.flag_nr(), flagReg.flag_subnr()); p->CMP(GEN_CONDITIONAL_L, m, GenRegister::immud(64)); + + p->curr.execWidth = 1; + p->curr.noMask = 1; + p->AND(flagReg, flagReg, emaskReg); + p->curr.predicate = GEN_PREDICATE_NORMAL; // under condition, jump back to start point if (simdWidth == 8) @@ -1453,8 +1459,6 @@ namespace gbe p->curr.predicate = GEN_PREDICATE_ALIGN1_ANY16H; else NOT_IMPLEMENTED; - p->curr.execWidth = 1; - p->curr.noMask = 1; int jip = -(int)(p->n_instruction() - loop_start + 1) * 2; p->JMPI(zero); p->patchJMPI(p->n_instruction()-2, jip); -- 1.8.3.2 _______________________________________________ Beignet mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/beignet
