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x86_64: clean up formatting functions for Instruction and Operand

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This commit is contained in:
Jakub Konka 2023-04-17 13:43:01 +02:00
parent 5bc4417d2a
commit 13503b7cba
2 changed files with 45 additions and 6 deletions
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4
src/arch/x86_64/CodeGen.zig
View File

@ -439,9 +439,7 @@ fn dumpWipMir(self: *Self, inst: Mir.Inst) !void {
},
else => |e| return e,
}) |lower_inst| {
try stderr.writeAll(" | ");
try lower_inst.fmtPrint(stderr);
try stderr.writeByte('\n');
try stderr.print(" | {}\n", .{lower_inst});
}
}

47
src/arch/x86_64/encoder.zig
View File

@ -54,7 +54,34 @@ pub const Instruction = struct {
};
}
pub fn fmtPrint(op: Operand, enc_op: Encoding.Op, writer: anytype) @TypeOf(writer).Error!void {
fn format(
op: Operand,
comptime unused_format_string: []const u8,
options: std.fmt.FormatOptions,
writer: anytype,
) !void {
_ = op;
_ = unused_format_string;
_ = options;
_ = writer;
@compileError("do not format Operand directly; use fmtPrint() instead");
}
const FormatContext = struct {
op: Operand,
enc_op: Encoding.Op,
};
fn fmt(
ctx: FormatContext,
comptime unused_format_string: []const u8,
options: std.fmt.FormatOptions,
writer: anytype,
) @TypeOf(writer).Error!void {
_ = unused_format_string;
_ = options;
const op = ctx.op;
const enc_op = ctx.enc_op;
switch (op) {
.none => {},
.reg => |reg| try writer.writeAll(@tagName(reg)),
@ -105,6 +132,13 @@ pub const Instruction = struct {
.imm => |imm| try writer.print("0x{x}", .{imm.asUnsigned(enc_op.bitSize())}),
}
}
pub fn fmtPrint(op: Operand, enc_op: Encoding.Op) std.fmt.Formatter(fmt) {
return .{ .data = .{
.op = op,
.enc_op = enc_op,
} };
}
};
pub fn new(prefix: Prefix, mnemonic: Mnemonic, ops: []const Operand) !Instruction {
@ -130,14 +164,21 @@ pub const Instruction = struct {
return inst;
}
pub fn fmtPrint(inst: Instruction, writer: anytype) @TypeOf(writer).Error!void {
pub fn format(
inst: Instruction,
comptime unused_format_string: []const u8,
options: std.fmt.FormatOptions,
writer: anytype,
) @TypeOf(writer).Error!void {
_ = unused_format_string;
_ = options;
if (inst.prefix != .none) try writer.print("{s} ", .{@tagName(inst.prefix)});
try writer.print("{s}", .{@tagName(inst.encoding.mnemonic)});
for (inst.ops, inst.encoding.data.ops, 0..) |op, enc, i| {
if (op == .none) break;
if (i > 0) try writer.writeByte(',');
try writer.writeByte(' ');
try op.fmtPrint(enc, writer);
try writer.print("{}", .{op.fmtPrint(enc)});
}
}