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aco: sink get_alu_src() in bfe lowering 

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6424>
This commit is contained in:
Rhys Perry 2020-08-21 13:25:45 +01:00 committed by Marge Bot
parent 14d748eb28
commit d2cf6a8399
1 changed files with 8 additions and 5 deletions
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13
src/amd/compiler/aco_instruction_selection.cpp
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@ -2757,21 +2757,24 @@ void visit_alu_instr(isel_context *ctx, nir_alu_instr *instr)
}
case nir_op_ubfe:
case nir_op_ibfe: {
Temp base = get_alu_src(ctx, instr->src[0]);
Temp offset = get_alu_src(ctx, instr->src[1]);
Temp bits = get_alu_src(ctx, instr->src[2]);
if (dst.bytes() != 4)
unreachable("Unsupported BFE bit size");
if (dst.type() == RegType::sgpr) {
Temp base = get_alu_src(ctx, instr->src[0]);
nir_const_value* const_offset = nir_src_as_const_value(instr->src[1].src);
nir_const_value* const_bits = nir_src_as_const_value(instr->src[2].src);
if (const_offset && const_bits) {
uint32_t extract = (const_bits->u32 << 16) | (const_offset->u32 & 0x1f);
aco_opcode opcode = instr->op == nir_op_ubfe ? aco_opcode::s_bfe_u32 : aco_opcode::s_bfe_i32;
bld.sop2(opcode, Definition(dst), bld.def(s1, scc), base, Operand(extract));
} else if (instr->op == nir_op_ubfe) {
break;
}
Temp offset = get_alu_src(ctx, instr->src[1]);
Temp bits = get_alu_src(ctx, instr->src[2]);
if (instr->op == nir_op_ubfe) {
Temp mask = bld.sop2(aco_opcode::s_bfm_b32, bld.def(s1), bits, offset);
Temp masked = bld.sop2(aco_opcode::s_and_b32, bld.def(s1), bld.def(s1, scc), base, mask);
bld.sop2(aco_opcode::s_lshr_b32, Definition(dst), bld.def(s1, scc), masked, offset);