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x86_64: refactor Lower.zig

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Jakub Konka 2023-10-27 21:17:56 +02:00 committed by Jacob Young
parent df7db0c4be
commit 493f786b38
1 changed files with 45 additions and 44 deletions
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89
src/arch/x86_64/Lower.zig
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@ -407,57 +407,58 @@ fn generic(lower: *Lower, inst: Mir.Inst) Error!void {
.mi_sib_u, .mi_rip_u, .mi_sib_s, .mi_rip_s => inst.data.x.fixes,
.m_sib, .m_rip, .rax_moffs, .moffs_rax => inst.data.x.fixes,
.extern_fn_reloc,
.linker_reloc,
.got_reloc,
.direct_reloc,
.import_reloc,
.tlv_reloc,
=> ._,
.linker_reloc => {
if (lower.bin_file.options.pic) {
const reg = inst.data.rx.r1;
const extra = lower.mir.extraData(Mir.Reloc, inst.data.rx.payload).data;
_ = lower.reloc(.{ .linker_reloc = extra });
const mnemonic: Mnemonic = switch (inst.tag) {
.mov => .mov,
.lea => .lea,
else => unreachable,
};
try lower.emit(.none, mnemonic, &.{
.{ .reg = reg },
.{ .mem = Memory.rip(Memory.PtrSize.fromBitSize(reg.bitSize()), 0) },
});
} else {
switch (inst.tag) {
.call => {
_ = lower.reloc(.{ .linker_reloc = inst.data.reloc });
try lower.emit(.none, .call, &.{
.{ .mem = Memory.sib(.qword, .{ .base = .{ .reg = .ds }, .disp = 0 }) },
});
},
.lea => {
const reg = inst.data.rx.r1;
const extra = lower.mir.extraData(Mir.Reloc, inst.data.rx.payload).data;
try lower.emit(.none, .mov, &.{
.{ .reg = reg },
.{ .imm = lower.reloc(.{ .linker_reloc = extra }) },
});
},
.mov => {
const reg = inst.data.rx.r1;
const extra = lower.mir.extraData(Mir.Reloc, inst.data.rx.payload).data;
_ = lower.reloc(.{ .linker_reloc = extra });
try lower.emit(.none, .mov, &.{
.{ .reg = reg },
.{ .mem = Memory.sib(.qword, .{ .base = .{ .reg = .ds }, .disp = 0 }) },
});
},
else => return lower.fail("TODO lower {s} {s}", .{ @tagName(inst.tag), @tagName(inst.ops) }),
}
}
return;
},
else => return lower.fail("TODO lower .{s}", .{@tagName(inst.ops)}),
};
if (inst.ops == .linker_reloc) {
if (lower.bin_file.options.pic) {
const reg = inst.data.rx.r1;
const extra = lower.mir.extraData(Mir.Reloc, inst.data.rx.payload).data;
_ = lower.reloc(.{ .linker_reloc = extra });
const mnemonic: Mnemonic = switch (inst.tag) {
.mov => .mov,
.lea => .lea,
else => unreachable,
};
try lower.emit(.none, mnemonic, &.{
.{ .reg = reg },
.{ .mem = Memory.rip(Memory.PtrSize.fromBitSize(reg.bitSize()), 0) },
});
} else {
switch (inst.tag) {
.call => {
_ = lower.reloc(.{ .linker_reloc = inst.data.reloc });
try lower.emit(.none, .call, &.{
.{ .mem = Memory.sib(.qword, .{ .base = .{ .reg = .ds }, .disp = 0 }) },
});
},
.lea => {
const reg = inst.data.rx.r1;
const extra = lower.mir.extraData(Mir.Reloc, inst.data.rx.payload).data;
try lower.emit(.none, .mov, &.{
.{ .reg = reg },
.{ .imm = lower.reloc(.{ .linker_reloc = extra }) },
});
},
.mov => {
const reg = inst.data.rx.r1;
const extra = lower.mir.extraData(Mir.Reloc, inst.data.rx.payload).data;
_ = lower.reloc(.{ .linker_reloc = extra });
try lower.emit(.none, .mov, &.{
.{ .reg = reg },
.{ .mem = Memory.sib(.qword, .{ .base = .{ .reg = .ds }, .disp = 0 }) },
});
},
else => return lower.fail("TODO lower {s} {s}", .{ @tagName(inst.tag), @tagName(inst.ops) }),
}
}
} else try lower.emit(switch (fixes) {
try lower.emit(switch (fixes) {
inline else => |tag| comptime if (std.mem.indexOfScalar(u8, @tagName(tag), ' ')) |space|
@field(Prefix, @tagName(tag)[0..space])
else