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astgen: implement float literals

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Isaac Freund 2021-03-26 15:41:49 +01:00
parent d8ee8794e1
commit 22338d7816
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1 changed files with 11 additions and 5 deletions
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16
src/astgen.zig
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@ -2959,26 +2959,32 @@ fn floatLiteral(
mod: *Module,
scope: *Scope,
rl: ResultLoc,
float_lit: ast.Node.Index,
node: ast.Node.Index,
) InnerError!zir.Inst.Ref {
if (true) @panic("TODO update for zir-memory-layout");
const arena = scope.arena();
const tree = scope.tree();
const main_tokens = tree.nodes.items(.main_token);
const gz = scope.getGenZir();
const main_token = main_tokens[float_lit];
const main_token = main_tokens[node];
const bytes = tree.tokenSlice(main_token);
if (bytes.len > 2 and bytes[1] == 'x') {
assert(bytes[0] == '0'); // validated by tokenizer
return mod.failTok(scope, main_token, "TODO implement hex floats", .{});
}
const float_number = std.fmt.parseFloat(f128, bytes) catch |e| switch (e) {
error.InvalidCharacter => unreachable, // validated by tokenizer
};
const result = try addZIRInstConst(mod, scope, src, .{
const typed_value = try arena.create(TypedValue);
typed_value.* = .{
.ty = Type.initTag(.comptime_float),
.val = try Value.Tag.float_128.create(arena, float_number),
};
const result = try gz.add(.{
.tag = .@"const",
.data = .{ .@"const" = typed_value },
});
return rvalue(mod, scope, rl, result);
return rvalue(mod, scope, rl, result, node);
}
fn asmExpr(