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aco: Implement uclz. 

Signed-off-by: Georg Lehmann <dadschoorse@gmail.com>
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13895>
This commit is contained in:
Georg Lehmann 2021-11-19 14:27:06 +01:00 committed by Marge Bot
parent 79e266fffc
commit 529ec3d7dc
1 changed files with 13 additions and 0 deletions
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13
src/amd/compiler/aco_instruction_selection.cpp
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@ -1768,6 +1768,19 @@ visit_alu_instr(isel_context* ctx, nir_alu_instr* instr)
}
break;
}
case nir_op_uclz: {
Temp src = get_alu_src(ctx, instr->src[0]);
if (src.regClass() == s1) {
Temp msb_rev = bld.sop1(aco_opcode::s_flbit_i32_b32, bld.def(s1), src);
bld.sop2(aco_opcode::s_min_u32, Definition(dst), Operand::c32(32u), msb_rev);
} else if (src.regClass() == v1) {
Temp msb_rev = bld.vop1(aco_opcode::v_ffbh_u32, bld.def(v1), src);
bld.vop2(aco_opcode::v_min_u32, Definition(dst), Operand::c32(32u), msb_rev);
} else {
isel_err(&instr->instr, "Unimplemented NIR instr bit size");
}
break;
}
case nir_op_bitfield_reverse: {
if (dst.regClass() == s1) {
bld.sop1(aco_opcode::s_brev_b32, Definition(dst), get_alu_src(ctx, instr->src[0]));