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aco: sign-extend the input and identity for 8-bit subgroup operations

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Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4494>
This commit is contained in:
Samuel Pitoiset 2020-05-20 11:32:50 +02:00 • committed by Marge Bot
parent c76595aec2
commit 2d4493ee11
1 changed files with 12 additions and 0 deletions
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12
src/amd/compiler/aco_lower_to_hw_instr.cpp
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@ -506,6 +506,18 @@ void emit_reduction(lower_context *ctx, aco_opcode op, ReduceOp reduce_op, unsig
Operand(stmp, bld.lm));
}
if (src.regClass() == v1b) {
aco_ptr<SDWA_instruction> sdwa{create_instruction<SDWA_instruction>(aco_opcode::v_mov_b32, asSDWA(Format::VOP1), 1, 1)};
sdwa->operands[0] = Operand(PhysReg{tmp}, v1);
sdwa->definitions[0] = Definition(PhysReg{tmp}, v1);
if (reduce_op == imin8 || reduce_op == imax8)
sdwa->sel[0] = sdwa_sbyte;
else
sdwa->sel[0] = sdwa_ubyte;
sdwa->dst_sel = sdwa_udword;
bld.insert(std::move(sdwa));
}
bool reduction_needs_last_op = false;
switch (op) {
case aco_opcode::p_reduce: