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aco: Implement [ui]find_msb_rev.

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Signed-off-by: Georg Lehmann <dadschoorse@gmail.com>
Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18951>
This commit is contained in:
Georg Lehmann
2022-10-04 15:08:06 +02:00
parent 1e552b9c95
commit 058174c4de
1 changed files with 16 additions and 0 deletions
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16
src/amd/compiler/aco_instruction_selection.cpp
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@@ -1822,6 +1822,22 @@ visit_alu_instr(isel_context* ctx, nir_alu_instr* instr)
}
break;
}
case nir_op_ufind_msb_rev:
case nir_op_ifind_msb_rev: {
Temp src = get_alu_src(ctx, instr->src[0]);
if (src.regClass() == s1) {
aco_opcode op = instr->op == nir_op_ufind_msb_rev ? aco_opcode::s_flbit_i32_b32
: aco_opcode::s_flbit_i32;
bld.sop1(op, Definition(dst), src);
} else if (src.regClass() == v1) {
aco_opcode op =
instr->op == nir_op_ufind_msb_rev ? aco_opcode::v_ffbh_u32 : aco_opcode::v_ffbh_i32;
emit_vop1_instruction(ctx, instr, op, dst);
} else {
isel_err(&instr->instr, "Unimplemented NIR instr bit size");
}
break;
}
case nir_op_uclz: {
Temp src = get_alu_src(ctx, instr->src[0]);
if (src.regClass() == s1) {