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nvc0/ir: Implement TGSI_OPCODE_BALLOT and TGSI_OPCODE_READ_* 

v2: Check if each channel is masked in TGSI_OPCODE_BALLOT (Ilia Mirkin)

Signed-off-by: Boyan Ding <boyan.j.ding@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
This commit is contained in:
Boyan Ding 2017-04-10 22:56:04 +08:00 committed by Ilia Mirkin
parent 48d00779d0
commit 59f6aa8096
1 changed files with 31 additions and 0 deletions
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31
src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp
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@ -978,6 +978,10 @@ static nv50_ir::operation translateOpcode(uint opcode)
NV50_IR_OPCODE_CASE(VOTE_ANY, VOTE);
NV50_IR_OPCODE_CASE(VOTE_EQ, VOTE);
NV50_IR_OPCODE_CASE(BALLOT, VOTE);
NV50_IR_OPCODE_CASE(READ_INVOC, SHFL);
NV50_IR_OPCODE_CASE(READ_FIRST, SHFL);
NV50_IR_OPCODE_CASE(END, EXIT);
default:
@ -3431,6 +3435,33 @@ Converter::handleInstruction(const struct tgsi_full_instruction *insn)
mkCvt(OP_CVT, TYPE_U32, dst0[c], TYPE_U8, val0);
}
break;
case TGSI_OPCODE_BALLOT:
if (!tgsi.getDst(0).isMasked(0)) {
val0 = new_LValue(func, FILE_PREDICATE);
mkCmp(OP_SET, CC_NE, TYPE_U32, val0, TYPE_U32, fetchSrc(0, 0), zero);
mkOp1(op, TYPE_U32, dst0[0], val0)->subOp = NV50_IR_SUBOP_VOTE_ANY;
}
if (!tgsi.getDst(0).isMasked(1))
mkMov(dst0[1], zero, TYPE_U32);
break;
case TGSI_OPCODE_READ_FIRST:
// ReadFirstInvocationARB(src) is implemented as
// ReadInvocationARB(src, findLSB(ballot(true)))
val0 = getScratch();
mkOp1(OP_VOTE, TYPE_U32, val0, mkImm(1))->subOp = NV50_IR_SUBOP_VOTE_ANY;
mkOp2(OP_EXTBF, TYPE_U32, val0, val0, mkImm(0x2000))
->subOp = NV50_IR_SUBOP_EXTBF_REV;
mkOp1(OP_BFIND, TYPE_U32, val0, val0)->subOp = NV50_IR_SUBOP_BFIND_SAMT;
src1 = val0;
/* fallthrough */
case TGSI_OPCODE_READ_INVOC:
if (tgsi.getOpcode() == TGSI_OPCODE_READ_INVOC)
src1 = fetchSrc(1, 0);
FOR_EACH_DST_ENABLED_CHANNEL(0, c, tgsi) {
geni = mkOp3(op, dstTy, dst0[c], fetchSrc(0, c), src1, mkImm(0x1f));
geni->subOp = NV50_IR_SUBOP_SHFL_IDX;
}
break;
case TGSI_OPCODE_CLOCK:
// Stick the 32-bit clock into the high dword of the logical result.
if (!tgsi.getDst(0).isMasked(0))