diff options
Diffstat (limited to 'src/codegen/c.zig')
| -rw-r--r-- | src/codegen/c.zig | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/src/codegen/c.zig b/src/codegen/c.zig index 5343977ba3..75864669c9 100644 --- a/src/codegen/c.zig +++ b/src/codegen/c.zig @@ -927,9 +927,9 @@ pub const DeclGen = struct { }; const int_val = Value.initPayload(&int_val_pl.base); - try writer.writeByte('('); - try dg.renderTypecast(writer, ty); - try writer.writeByte(')'); + try writer.writeAll("zig_cast_"); + try dg.renderTypeForBuiltinFnName(writer, ty); + try writer.writeByte(' '); if (std.math.isFinite(f128_val)) { try writer.writeAll("zig_as_"); try dg.renderTypeForBuiltinFnName(writer, ty); @@ -3344,16 +3344,27 @@ fn airIntCast(f: *Function, inst: Air.Inst.Index) !CValue { return CValue.none; } + const target = f.object.dg.module.getTarget(); const operand = try f.resolveInst(ty_op.operand); try reap(f, inst, &.{ty_op.operand}); const writer = f.object.writer(); const inst_ty = f.air.typeOfIndex(inst); const local = try f.allocLocal(inst, inst_ty); try f.writeCValue(writer, local, .Other); - try writer.writeAll(" = ("); - try f.renderTypecast(writer, inst_ty); - try writer.writeByte(')'); + try writer.writeAll(" = "); + const cant_cast = inst_ty.isInt() and inst_ty.bitSize(target) > 64; + if (cant_cast) { + if (f.air.typeOf(ty_op.operand).bitSize(target) > 64) return f.fail("TODO: C backend: implement casting between types > 64 bits", .{}); + try writer.writeAll("zig_as_"); + try f.object.dg.renderTypeForBuiltinFnName(writer, inst_ty); + try writer.writeAll("(0, "); + } else { + try writer.writeByte('('); + try f.renderTypecast(writer, inst_ty); + try writer.writeByte(')'); + } try f.writeCValue(writer, operand, .Other); + if (cant_cast) try writer.writeByte(')'); try writer.writeAll(";\n"); return local; } |