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stage2: lower u128, and refactor some bits in x64

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This commit is contained in:
Jakub Konka 2022-04-15 13:46:51 +02:00 committed by Andrew Kelley
parent 3723eb7f31
commit 52c8ac1a84
2 changed files with 22 additions and 21 deletions
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25
src/arch/x86_64/CodeGen.zig
View File

@ -155,6 +155,8 @@ pub const MCValue = union(enum) {
.memory,
.stack_offset,
.ptr_stack_offset,
.direct_load,
.got_load,
=> true,
else => false,
};
@ -3131,20 +3133,19 @@ fn genBinMathOp(self: *Self, inst: Air.Inst.Index, op_lhs: Air.Inst.Ref, op_rhs:
}
fn genBinMathOpMir(self: *Self, mir_tag: Mir.Inst.Tag, dst_ty: Type, dst_mcv: MCValue, src_mcv: MCValue) !void {
const abi_size = dst_ty.abiSize(self.target.*);
const abi_size = @intCast(u32, dst_ty.abiSize(self.target.*));
switch (dst_mcv) {
.none => unreachable,
.undef => unreachable,
.dead, .unreach, .immediate => unreachable,
.compare_flags_unsigned => unreachable,
.compare_flags_signed => unreachable,
.ptr_stack_offset => unreachable,
.register_overflow_unsigned => unreachable,
.register_overflow_signed => unreachable,
.register => |dst_reg| {
switch (src_mcv) {
.none => unreachable,
.undef => try self.genSetReg(dst_ty, dst_reg, .undef),
.undef => unreachable,
.dead, .unreach => unreachable,
.register_overflow_unsigned => unreachable,
.register_overflow_signed => unreachable,
@ -3168,7 +3169,7 @@ fn genBinMathOpMir(self: *Self, mir_tag: Mir.Inst.Tag, dst_ty: Type, dst_mcv: MC
_ = try self.addInst(.{
.tag = mir_tag,
.ops = (Mir.Ops{
.reg1 = registerAlias(dst_reg, @intCast(u32, abi_size)),
.reg1 = registerAlias(dst_reg, abi_size),
}).encode(),
.data = .{ .imm = @truncate(u32, imm) },
});
@ -3192,7 +3193,7 @@ fn genBinMathOpMir(self: *Self, mir_tag: Mir.Inst.Tag, dst_ty: Type, dst_mcv: MC
_ = try self.addInst(.{
.tag = mir_tag,
.ops = (Mir.Ops{
.reg1 = registerAlias(dst_reg, @intCast(u32, abi_size)),
.reg1 = registerAlias(dst_reg, abi_size),
.reg2 = .rbp,
.flags = 0b01,
}).encode(),
@ -3201,19 +3202,18 @@ fn genBinMathOpMir(self: *Self, mir_tag: Mir.Inst.Tag, dst_ty: Type, dst_mcv: MC
},
}
},
.stack_offset => |off| {
.ptr_stack_offset, .stack_offset => |off| {
if (off > math.maxInt(i32)) {
return self.fail("stack offset too large", .{});
}
if (abi_size > 8) {
return self.fail("TODO implement ADD/SUB/CMP for stack dst with large ABI", .{});
return self.fail("TODO implement {} for stack dst with large ABI", .{mir_tag});
}
switch (src_mcv) {
.none => unreachable,
.undef => return self.genSetStack(dst_ty, off, .undef, .{}),
.undef => unreachable,
.dead, .unreach => unreachable,
.ptr_stack_offset => unreachable,
.register_overflow_unsigned => unreachable,
.register_overflow_signed => unreachable,
.register => |src_reg| {
@ -3221,7 +3221,7 @@ fn genBinMathOpMir(self: *Self, mir_tag: Mir.Inst.Tag, dst_ty: Type, dst_mcv: MC
.tag = mir_tag,
.ops = (Mir.Ops{
.reg1 = .rbp,
.reg2 = registerAlias(src_reg, @intCast(u32, abi_size)),
.reg2 = registerAlias(src_reg, abi_size),
.flags = 0b10,
}).encode(),
.data = .{ .imm = @bitCast(u32, -off) },
@ -3257,7 +3257,10 @@ fn genBinMathOpMir(self: *Self, mir_tag: Mir.Inst.Tag, dst_ty: Type, dst_mcv: MC
.data = .{ .payload = payload },
});
},
.memory, .stack_offset => {
.memory,
.stack_offset,
.ptr_stack_offset,
=> {
return self.fail("TODO implement x86 ADD/SUB/CMP source memory", .{});
},
.got_load, .direct_load => {

18
src/codegen.zig
View File

@ -426,22 +426,20 @@ pub fn generateSymbol(
},
},
.Int => {
// TODO populate .debug_info for the integer
const info = typed_value.ty.intInfo(bin_file.options.target);
const info = typed_value.ty.intInfo(target);
if (info.bits <= 8) {
const x = @intCast(u8, typed_value.val.toUnsignedInt(target));
try code.append(x);
return Result{ .appended = {} };
}
if (info.bits > 64) {
return Result{
.fail = try ErrorMsg.create(
bin_file.allocator,
src_loc,
"TODO implement generateSymbol for big ints ('{}')",
.{typed_value.ty.fmtDebug()},
),
};
var bigint_buffer: Value.BigIntSpace = undefined;
const bigint = typed_value.val.toBigInt(&bigint_buffer, target);
const abi_size = try math.cast(usize, typed_value.ty.abiSize(target));
const start = code.items.len;
try code.resize(start + abi_size);
bigint.writeTwosComplement(code.items[start..][0..abi_size], info.bits, abi_size, endian);
return Result{ .appended = {} };
}
switch (info.signedness) {
.unsigned => {