diff options
Diffstat (limited to 'src/codegen/c.zig')
| -rw-r--r-- | src/codegen/c.zig | 39 |
1 files changed, 34 insertions, 5 deletions
diff --git a/src/codegen/c.zig b/src/codegen/c.zig index fd4a46b5e5..5343977ba3 100644 --- a/src/codegen/c.zig +++ b/src/codegen/c.zig @@ -3262,11 +3262,20 @@ fn airLoad(f: *Function, inst: Air.Inst.Index) !CValue { try f.object.dg.renderTypeForBuiltinFnName(writer, field_ty); try writer.writeAll("(("); try f.renderTypecast(writer, field_ty); - try writer.writeAll(")zig_shr_"); + try writer.writeByte(')'); + const cant_cast = host_ty.isInt() and host_ty.bitSize(target) > 64; + if (cant_cast) { + if (field_ty.bitSize(target) > 64) return f.fail("TODO: C backend: implement casting between types > 64 bits", .{}); + try writer.writeAll("zig_lo_"); + try f.object.dg.renderTypeForBuiltinFnName(writer, host_ty); + try writer.writeByte('('); + } + try writer.writeAll("zig_shr_"); try f.object.dg.renderTypeForBuiltinFnName(writer, host_ty); try writer.writeByte('('); try f.writeCValueDeref(writer, operand); try writer.print(", {})", .{try f.fmtIntLiteral(bit_offset_ty, bit_offset_val)}); + if (cant_cast) try writer.writeByte(')'); try f.object.dg.renderBuiltinInfo(writer, field_ty, .Bits); try writer.writeByte(')'); } else { @@ -3539,15 +3548,26 @@ fn airStore(f: *Function, inst: Air.Inst.Index) !CValue { try f.writeCValueDeref(writer, ptr_val); try writer.print(", {x}), zig_shl_", .{try f.fmtIntLiteral(host_ty, mask_val)}); try f.object.dg.renderTypeForBuiltinFnName(writer, host_ty); - try writer.writeAll("(("); - try f.renderTypecast(writer, host_ty); - try writer.writeByte(')'); + try writer.writeByte('('); + const cant_cast = host_ty.isInt() and host_ty.bitSize(target) > 64; + if (cant_cast) { + if (src_ty.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, host_ty); + try writer.writeAll("(0, "); + } else { + try writer.writeByte('('); + try f.renderTypecast(writer, host_ty); + try writer.writeByte(')'); + } + if (src_ty.isPtrAtRuntime()) { try writer.writeByte('('); try f.renderTypecast(writer, Type.usize); try writer.writeByte(')'); } try f.writeCValue(writer, src_val, .Other); + if (cant_cast) try writer.writeByte(')'); try writer.print(", {}))", .{try f.fmtIntLiteral(bit_offset_ty, bit_offset_val)}); } else { try f.writeCValueDeref(writer, ptr_val); @@ -5236,13 +5256,22 @@ fn airStructFieldVal(f: *Function, inst: Air.Inst.Index) !CValue { try f.object.dg.renderTypeForBuiltinFnName(writer, field_int_ty); try writer.writeAll("(("); try f.renderTypecast(writer, field_int_ty); - try writer.writeAll(")zig_shr_"); + try writer.writeByte(')'); + const cant_cast = int_info.bits > 64; + if (cant_cast) { + if (field_int_ty.bitSize(target) > 64) return f.fail("TODO: C backend: implement casting between types > 64 bits", .{}); + try writer.writeAll("zig_lo_"); + try f.object.dg.renderTypeForBuiltinFnName(writer, struct_ty); + try writer.writeByte('('); + } + try writer.writeAll("zig_shr_"); try f.object.dg.renderTypeForBuiltinFnName(writer, struct_ty); try writer.writeByte('('); try f.writeCValue(writer, struct_byval, .Other); try writer.writeAll(", "); try f.object.dg.renderValue(writer, bit_offset_ty, bit_offset_val, .FunctionArgument); try writer.writeByte(')'); + if (cant_cast) try writer.writeByte(')'); try f.object.dg.renderBuiltinInfo(writer, field_int_ty, .Bits); try writer.writeAll(");\n"); if (inst_ty.eql(field_int_ty, f.object.dg.module)) return temp_local; |