| //! Codegen of intrinsics. This includes `extern "rust-intrinsic"`, `extern "platform-intrinsic"` |
| //! and LLVM intrinsics that have symbol names starting with `llvm.`. |
| |
| macro_rules! intrinsic_args { |
| ($fx:expr, $args:expr => ($($arg:tt),*); $intrinsic:expr) => { |
| #[allow(unused_parens)] |
| let ($($arg),*) = if let [$($arg),*] = $args { |
| ($(codegen_operand($fx, &($arg).node)),*) |
| } else { |
| $crate::intrinsics::bug_on_incorrect_arg_count($intrinsic); |
| }; |
| } |
| } |
| |
| mod llvm; |
| mod llvm_aarch64; |
| mod llvm_x86; |
| mod simd; |
| |
| use cranelift_codegen::ir::AtomicRmwOp; |
| use rustc_middle::ty; |
| use rustc_middle::ty::layout::{HasParamEnv, ValidityRequirement}; |
| use rustc_middle::ty::print::{with_no_trimmed_paths, with_no_visible_paths}; |
| use rustc_middle::ty::GenericArgsRef; |
| use rustc_span::source_map::Spanned; |
| use rustc_span::symbol::{sym, Symbol}; |
| |
| pub(crate) use self::llvm::codegen_llvm_intrinsic_call; |
| use crate::cast::clif_intcast; |
| use crate::prelude::*; |
| |
| fn bug_on_incorrect_arg_count(intrinsic: impl std::fmt::Display) -> ! { |
| bug!("wrong number of args for intrinsic {}", intrinsic); |
| } |
| |
| fn report_atomic_type_validation_error<'tcx>( |
| fx: &mut FunctionCx<'_, '_, 'tcx>, |
| intrinsic: Symbol, |
| span: Span, |
| ty: Ty<'tcx>, |
| ) { |
| fx.tcx.dcx().span_err( |
| span, |
| format!( |
| "`{}` intrinsic: expected basic integer or raw pointer type, found `{:?}`", |
| intrinsic, ty |
| ), |
| ); |
| // Prevent verifier error |
| fx.bcx.ins().trap(TrapCode::UnreachableCodeReached); |
| } |
| |
| pub(crate) fn clif_vector_type<'tcx>(tcx: TyCtxt<'tcx>, layout: TyAndLayout<'tcx>) -> Type { |
| let (element, count) = match layout.abi { |
| Abi::Vector { element, count } => (element, count), |
| _ => unreachable!(), |
| }; |
| |
| scalar_to_clif_type(tcx, element).by(u32::try_from(count).unwrap()).unwrap() |
| } |
| |
| fn simd_for_each_lane<'tcx>( |
| fx: &mut FunctionCx<'_, '_, 'tcx>, |
| val: CValue<'tcx>, |
| ret: CPlace<'tcx>, |
| f: &dyn Fn(&mut FunctionCx<'_, '_, 'tcx>, Ty<'tcx>, Ty<'tcx>, Value) -> Value, |
| ) { |
| let layout = val.layout(); |
| |
| let (lane_count, lane_ty) = layout.ty.simd_size_and_type(fx.tcx); |
| let lane_layout = fx.layout_of(lane_ty); |
| let (ret_lane_count, ret_lane_ty) = ret.layout().ty.simd_size_and_type(fx.tcx); |
| let ret_lane_layout = fx.layout_of(ret_lane_ty); |
| assert_eq!(lane_count, ret_lane_count); |
| |
| for lane_idx in 0..lane_count { |
| let lane = val.value_lane(fx, lane_idx).load_scalar(fx); |
| |
| let res_lane = f(fx, lane_layout.ty, ret_lane_layout.ty, lane); |
| let res_lane = CValue::by_val(res_lane, ret_lane_layout); |
| |
| ret.place_lane(fx, lane_idx).write_cvalue(fx, res_lane); |
| } |
| } |
| |
| fn simd_pair_for_each_lane_typed<'tcx>( |
| fx: &mut FunctionCx<'_, '_, 'tcx>, |
| x: CValue<'tcx>, |
| y: CValue<'tcx>, |
| ret: CPlace<'tcx>, |
| f: &dyn Fn(&mut FunctionCx<'_, '_, 'tcx>, CValue<'tcx>, CValue<'tcx>) -> CValue<'tcx>, |
| ) { |
| assert_eq!(x.layout(), y.layout()); |
| let layout = x.layout(); |
| |
| let (lane_count, _lane_ty) = layout.ty.simd_size_and_type(fx.tcx); |
| let (ret_lane_count, _ret_lane_ty) = ret.layout().ty.simd_size_and_type(fx.tcx); |
| assert_eq!(lane_count, ret_lane_count); |
| |
| for lane_idx in 0..lane_count { |
| let x_lane = x.value_lane(fx, lane_idx); |
| let y_lane = y.value_lane(fx, lane_idx); |
| |
| let res_lane = f(fx, x_lane, y_lane); |
| |
| ret.place_lane(fx, lane_idx).write_cvalue(fx, res_lane); |
| } |
| } |
| |
| fn simd_pair_for_each_lane<'tcx>( |
| fx: &mut FunctionCx<'_, '_, 'tcx>, |
| x: CValue<'tcx>, |
| y: CValue<'tcx>, |
| ret: CPlace<'tcx>, |
| f: &dyn Fn(&mut FunctionCx<'_, '_, 'tcx>, Ty<'tcx>, Ty<'tcx>, Value, Value) -> Value, |
| ) { |
| assert_eq!(x.layout(), y.layout()); |
| let layout = x.layout(); |
| |
| let (lane_count, lane_ty) = layout.ty.simd_size_and_type(fx.tcx); |
| let lane_layout = fx.layout_of(lane_ty); |
| let (ret_lane_count, ret_lane_ty) = ret.layout().ty.simd_size_and_type(fx.tcx); |
| let ret_lane_layout = fx.layout_of(ret_lane_ty); |
| assert_eq!(lane_count, ret_lane_count); |
| |
| for lane_idx in 0..lane_count { |
| let x_lane = x.value_lane(fx, lane_idx).load_scalar(fx); |
| let y_lane = y.value_lane(fx, lane_idx).load_scalar(fx); |
| |
| let res_lane = f(fx, lane_layout.ty, ret_lane_layout.ty, x_lane, y_lane); |
| let res_lane = CValue::by_val(res_lane, ret_lane_layout); |
| |
| ret.place_lane(fx, lane_idx).write_cvalue(fx, res_lane); |
| } |
| } |
| |
| fn simd_horizontal_pair_for_each_lane<'tcx>( |
| fx: &mut FunctionCx<'_, '_, 'tcx>, |
| x: CValue<'tcx>, |
| y: CValue<'tcx>, |
| ret: CPlace<'tcx>, |
| f: &dyn Fn(&mut FunctionCx<'_, '_, 'tcx>, Ty<'tcx>, Ty<'tcx>, Value, Value) -> Value, |
| ) { |
| assert_eq!(x.layout(), y.layout()); |
| let layout = x.layout(); |
| |
| let (lane_count, lane_ty) = layout.ty.simd_size_and_type(fx.tcx); |
| let lane_layout = fx.layout_of(lane_ty); |
| let (ret_lane_count, ret_lane_ty) = ret.layout().ty.simd_size_and_type(fx.tcx); |
| let ret_lane_layout = fx.layout_of(ret_lane_ty); |
| assert_eq!(lane_count, ret_lane_count); |
| |
| for lane_idx in 0..lane_count { |
| let src = if lane_idx < (lane_count / 2) { x } else { y }; |
| let src_idx = lane_idx % (lane_count / 2); |
| |
| let lhs_lane = src.value_lane(fx, src_idx * 2).load_scalar(fx); |
| let rhs_lane = src.value_lane(fx, src_idx * 2 + 1).load_scalar(fx); |
| |
| let res_lane = f(fx, lane_layout.ty, ret_lane_layout.ty, lhs_lane, rhs_lane); |
| let res_lane = CValue::by_val(res_lane, ret_lane_layout); |
| |
| ret.place_lane(fx, lane_idx).write_cvalue(fx, res_lane); |
| } |
| } |
| |
| fn simd_trio_for_each_lane<'tcx>( |
| fx: &mut FunctionCx<'_, '_, 'tcx>, |
| x: CValue<'tcx>, |
| y: CValue<'tcx>, |
| z: CValue<'tcx>, |
| ret: CPlace<'tcx>, |
| f: &dyn Fn(&mut FunctionCx<'_, '_, 'tcx>, Ty<'tcx>, Ty<'tcx>, Value, Value, Value) -> Value, |
| ) { |
| assert_eq!(x.layout(), y.layout()); |
| let layout = x.layout(); |
| |
| let (lane_count, lane_ty) = layout.ty.simd_size_and_type(fx.tcx); |
| let lane_layout = fx.layout_of(lane_ty); |
| let (ret_lane_count, ret_lane_ty) = ret.layout().ty.simd_size_and_type(fx.tcx); |
| let ret_lane_layout = fx.layout_of(ret_lane_ty); |
| assert_eq!(lane_count, ret_lane_count); |
| |
| for lane_idx in 0..lane_count { |
| let x_lane = x.value_lane(fx, lane_idx).load_scalar(fx); |
| let y_lane = y.value_lane(fx, lane_idx).load_scalar(fx); |
| let z_lane = z.value_lane(fx, lane_idx).load_scalar(fx); |
| |
| let res_lane = f(fx, lane_layout.ty, ret_lane_layout.ty, x_lane, y_lane, z_lane); |
| let res_lane = CValue::by_val(res_lane, ret_lane_layout); |
| |
| ret.place_lane(fx, lane_idx).write_cvalue(fx, res_lane); |
| } |
| } |
| |
| fn simd_reduce<'tcx>( |
| fx: &mut FunctionCx<'_, '_, 'tcx>, |
| val: CValue<'tcx>, |
| acc: Option<Value>, |
| ret: CPlace<'tcx>, |
| f: &dyn Fn(&mut FunctionCx<'_, '_, 'tcx>, Ty<'tcx>, Value, Value) -> Value, |
| ) { |
| let (lane_count, lane_ty) = val.layout().ty.simd_size_and_type(fx.tcx); |
| let lane_layout = fx.layout_of(lane_ty); |
| assert_eq!(lane_layout, ret.layout()); |
| |
| let (mut res_val, start_lane) = |
| if let Some(acc) = acc { (acc, 0) } else { (val.value_lane(fx, 0).load_scalar(fx), 1) }; |
| for lane_idx in start_lane..lane_count { |
| let lane = val.value_lane(fx, lane_idx).load_scalar(fx); |
| res_val = f(fx, lane_layout.ty, res_val, lane); |
| } |
| let res = CValue::by_val(res_val, lane_layout); |
| ret.write_cvalue(fx, res); |
| } |
| |
| // FIXME move all uses to `simd_reduce` |
| fn simd_reduce_bool<'tcx>( |
| fx: &mut FunctionCx<'_, '_, 'tcx>, |
| val: CValue<'tcx>, |
| ret: CPlace<'tcx>, |
| f: &dyn Fn(&mut FunctionCx<'_, '_, 'tcx>, Value, Value) -> Value, |
| ) { |
| let (lane_count, _lane_ty) = val.layout().ty.simd_size_and_type(fx.tcx); |
| assert!(ret.layout().ty.is_bool()); |
| |
| let res_val = val.value_lane(fx, 0).load_scalar(fx); |
| let mut res_val = fx.bcx.ins().band_imm(res_val, 1); // mask to boolean |
| for lane_idx in 1..lane_count { |
| let lane = val.value_lane(fx, lane_idx).load_scalar(fx); |
| let lane = fx.bcx.ins().band_imm(lane, 1); // mask to boolean |
| res_val = f(fx, res_val, lane); |
| } |
| let res_val = if fx.bcx.func.dfg.value_type(res_val) != types::I8 { |
| fx.bcx.ins().ireduce(types::I8, res_val) |
| } else { |
| res_val |
| }; |
| let res = CValue::by_val(res_val, ret.layout()); |
| ret.write_cvalue(fx, res); |
| } |
| |
| fn bool_to_zero_or_max_uint<'tcx>( |
| fx: &mut FunctionCx<'_, '_, 'tcx>, |
| ty: Ty<'tcx>, |
| val: Value, |
| ) -> Value { |
| let ty = fx.clif_type(ty).unwrap(); |
| |
| let int_ty = match ty { |
| types::F32 => types::I32, |
| types::F64 => types::I64, |
| ty => ty, |
| }; |
| |
| let mut res = fx.bcx.ins().bmask(int_ty, val); |
| |
| if ty.is_float() { |
| res = codegen_bitcast(fx, ty, res); |
| } |
| |
| res |
| } |
| |
| pub(crate) fn codegen_intrinsic_call<'tcx>( |
| fx: &mut FunctionCx<'_, '_, 'tcx>, |
| instance: Instance<'tcx>, |
| args: &[Spanned<mir::Operand<'tcx>>], |
| destination: CPlace<'tcx>, |
| target: Option<BasicBlock>, |
| source_info: mir::SourceInfo, |
| ) -> Result<(), Instance<'tcx>> { |
| let intrinsic = fx.tcx.item_name(instance.def_id()); |
| let instance_args = instance.args; |
| |
| if intrinsic.as_str().starts_with("simd_") { |
| self::simd::codegen_simd_intrinsic_call( |
| fx, |
| intrinsic, |
| instance_args, |
| args, |
| destination, |
| target.expect("target for simd intrinsic"), |
| source_info.span, |
| ); |
| } else if codegen_float_intrinsic_call(fx, intrinsic, args, destination) { |
| let ret_block = fx.get_block(target.expect("target for float intrinsic")); |
| fx.bcx.ins().jump(ret_block, &[]); |
| } else { |
| codegen_regular_intrinsic_call( |
| fx, |
| instance, |
| intrinsic, |
| instance_args, |
| args, |
| destination, |
| target, |
| source_info, |
| )?; |
| } |
| Ok(()) |
| } |
| |
| fn codegen_float_intrinsic_call<'tcx>( |
| fx: &mut FunctionCx<'_, '_, 'tcx>, |
| intrinsic: Symbol, |
| args: &[Spanned<mir::Operand<'tcx>>], |
| ret: CPlace<'tcx>, |
| ) -> bool { |
| let (name, arg_count, ty, clif_ty) = match intrinsic { |
| sym::expf32 => ("expf", 1, fx.tcx.types.f32, types::F32), |
| sym::expf64 => ("exp", 1, fx.tcx.types.f64, types::F64), |
| sym::exp2f32 => ("exp2f", 1, fx.tcx.types.f32, types::F32), |
| sym::exp2f64 => ("exp2", 1, fx.tcx.types.f64, types::F64), |
| sym::sqrtf32 => ("sqrtf", 1, fx.tcx.types.f32, types::F32), |
| sym::sqrtf64 => ("sqrt", 1, fx.tcx.types.f64, types::F64), |
| sym::powif32 => ("__powisf2", 2, fx.tcx.types.f32, types::F32), // compiler-builtins |
| sym::powif64 => ("__powidf2", 2, fx.tcx.types.f64, types::F64), // compiler-builtins |
| sym::powf32 => ("powf", 2, fx.tcx.types.f32, types::F32), |
| sym::powf64 => ("pow", 2, fx.tcx.types.f64, types::F64), |
| sym::logf32 => ("logf", 1, fx.tcx.types.f32, types::F32), |
| sym::logf64 => ("log", 1, fx.tcx.types.f64, types::F64), |
| sym::log2f32 => ("log2f", 1, fx.tcx.types.f32, types::F32), |
| sym::log2f64 => ("log2", 1, fx.tcx.types.f64, types::F64), |
| sym::log10f32 => ("log10f", 1, fx.tcx.types.f32, types::F32), |
| sym::log10f64 => ("log10", 1, fx.tcx.types.f64, types::F64), |
| sym::fabsf32 => ("fabsf", 1, fx.tcx.types.f32, types::F32), |
| sym::fabsf64 => ("fabs", 1, fx.tcx.types.f64, types::F64), |
| sym::fmaf32 => ("fmaf", 3, fx.tcx.types.f32, types::F32), |
| sym::fmaf64 => ("fma", 3, fx.tcx.types.f64, types::F64), |
| sym::copysignf32 => ("copysignf", 2, fx.tcx.types.f32, types::F32), |
| sym::copysignf64 => ("copysign", 2, fx.tcx.types.f64, types::F64), |
| sym::floorf32 => ("floorf", 1, fx.tcx.types.f32, types::F32), |
| sym::floorf64 => ("floor", 1, fx.tcx.types.f64, types::F64), |
| sym::ceilf32 => ("ceilf", 1, fx.tcx.types.f32, types::F32), |
| sym::ceilf64 => ("ceil", 1, fx.tcx.types.f64, types::F64), |
| sym::truncf32 => ("truncf", 1, fx.tcx.types.f32, types::F32), |
| sym::truncf64 => ("trunc", 1, fx.tcx.types.f64, types::F64), |
| sym::rintf32 => ("rintf", 1, fx.tcx.types.f32, types::F32), |
| sym::rintf64 => ("rint", 1, fx.tcx.types.f64, types::F64), |
| sym::roundf32 => ("roundf", 1, fx.tcx.types.f32, types::F32), |
| sym::roundf64 => ("round", 1, fx.tcx.types.f64, types::F64), |
| sym::roundevenf32 => ("roundevenf", 1, fx.tcx.types.f32, types::F32), |
| sym::roundevenf64 => ("roundeven", 1, fx.tcx.types.f64, types::F64), |
| sym::nearbyintf32 => ("nearbyintf", 1, fx.tcx.types.f32, types::F32), |
| sym::nearbyintf64 => ("nearbyint", 1, fx.tcx.types.f64, types::F64), |
| sym::sinf32 => ("sinf", 1, fx.tcx.types.f32, types::F32), |
| sym::sinf64 => ("sin", 1, fx.tcx.types.f64, types::F64), |
| sym::cosf32 => ("cosf", 1, fx.tcx.types.f32, types::F32), |
| sym::cosf64 => ("cos", 1, fx.tcx.types.f64, types::F64), |
| _ => return false, |
| }; |
| |
| if args.len() != arg_count { |
| bug!("wrong number of args for intrinsic {:?}", intrinsic); |
| } |
| |
| let (a, b, c); |
| let args = match args { |
| [x] => { |
| a = [codegen_operand(fx, &x.node).load_scalar(fx)]; |
| &a as &[_] |
| } |
| [x, y] => { |
| b = [ |
| codegen_operand(fx, &x.node).load_scalar(fx), |
| codegen_operand(fx, &y.node).load_scalar(fx), |
| ]; |
| &b |
| } |
| [x, y, z] => { |
| c = [ |
| codegen_operand(fx, &x.node).load_scalar(fx), |
| codegen_operand(fx, &y.node).load_scalar(fx), |
| codegen_operand(fx, &z.node).load_scalar(fx), |
| ]; |
| &c |
| } |
| _ => unreachable!(), |
| }; |
| |
| let layout = fx.layout_of(ty); |
| let res = match intrinsic { |
| sym::fmaf32 | sym::fmaf64 => { |
| CValue::by_val(fx.bcx.ins().fma(args[0], args[1], args[2]), layout) |
| } |
| sym::copysignf32 | sym::copysignf64 => { |
| CValue::by_val(fx.bcx.ins().fcopysign(args[0], args[1]), layout) |
| } |
| sym::fabsf32 |
| | sym::fabsf64 |
| | sym::floorf32 |
| | sym::floorf64 |
| | sym::ceilf32 |
| | sym::ceilf64 |
| | sym::truncf32 |
| | sym::truncf64 |
| | sym::nearbyintf32 |
| | sym::nearbyintf64 |
| | sym::sqrtf32 |
| | sym::sqrtf64 => { |
| let val = match intrinsic { |
| sym::fabsf32 | sym::fabsf64 => fx.bcx.ins().fabs(args[0]), |
| sym::floorf32 | sym::floorf64 => fx.bcx.ins().floor(args[0]), |
| sym::ceilf32 | sym::ceilf64 => fx.bcx.ins().ceil(args[0]), |
| sym::truncf32 | sym::truncf64 => fx.bcx.ins().trunc(args[0]), |
| sym::nearbyintf32 | sym::nearbyintf64 => fx.bcx.ins().nearest(args[0]), |
| sym::sqrtf32 | sym::sqrtf64 => fx.bcx.ins().sqrt(args[0]), |
| _ => unreachable!(), |
| }; |
| |
| CValue::by_val(val, layout) |
| } |
| |
| // These intrinsics aren't supported natively by Cranelift. |
| // Lower them to a libcall. |
| sym::powif32 | sym::powif64 => { |
| let input_tys: Vec<_> = vec![AbiParam::new(clif_ty), AbiParam::new(types::I32)]; |
| let ret_val = fx.lib_call(name, input_tys, vec![AbiParam::new(clif_ty)], &args)[0]; |
| CValue::by_val(ret_val, fx.layout_of(ty)) |
| } |
| _ => { |
| let input_tys: Vec<_> = args.iter().map(|_| AbiParam::new(clif_ty)).collect(); |
| let ret_val = fx.lib_call(name, input_tys, vec![AbiParam::new(clif_ty)], &args)[0]; |
| CValue::by_val(ret_val, fx.layout_of(ty)) |
| } |
| }; |
| |
| ret.write_cvalue(fx, res); |
| |
| true |
| } |
| |
| fn codegen_regular_intrinsic_call<'tcx>( |
| fx: &mut FunctionCx<'_, '_, 'tcx>, |
| instance: Instance<'tcx>, |
| intrinsic: Symbol, |
| generic_args: GenericArgsRef<'tcx>, |
| args: &[Spanned<mir::Operand<'tcx>>], |
| ret: CPlace<'tcx>, |
| destination: Option<BasicBlock>, |
| source_info: mir::SourceInfo, |
| ) -> Result<(), Instance<'tcx>> { |
| assert_eq!(generic_args, instance.args); |
| let usize_layout = fx.layout_of(fx.tcx.types.usize); |
| |
| match intrinsic { |
| sym::abort => { |
| fx.bcx.ins().trap(TrapCode::User(0)); |
| return Ok(()); |
| } |
| sym::likely | sym::unlikely => { |
| intrinsic_args!(fx, args => (a); intrinsic); |
| |
| ret.write_cvalue(fx, a); |
| } |
| sym::breakpoint => { |
| intrinsic_args!(fx, args => (); intrinsic); |
| |
| fx.bcx.ins().debugtrap(); |
| } |
| sym::copy => { |
| intrinsic_args!(fx, args => (src, dst, count); intrinsic); |
| let src = src.load_scalar(fx); |
| let dst = dst.load_scalar(fx); |
| let count = count.load_scalar(fx); |
| |
| let elem_ty = generic_args.type_at(0); |
| let elem_size: u64 = fx.layout_of(elem_ty).size.bytes(); |
| assert_eq!(args.len(), 3); |
| let byte_amount = |
| if elem_size != 1 { fx.bcx.ins().imul_imm(count, elem_size as i64) } else { count }; |
| |
| // FIXME emit_small_memmove |
| fx.bcx.call_memmove(fx.target_config, dst, src, byte_amount); |
| } |
| sym::volatile_copy_memory | sym::volatile_copy_nonoverlapping_memory => { |
| // NOTE: the volatile variants have src and dst swapped |
| intrinsic_args!(fx, args => (dst, src, count); intrinsic); |
| let dst = dst.load_scalar(fx); |
| let src = src.load_scalar(fx); |
| let count = count.load_scalar(fx); |
| |
| let elem_ty = generic_args.type_at(0); |
| let elem_size: u64 = fx.layout_of(elem_ty).size.bytes(); |
| assert_eq!(args.len(), 3); |
| let byte_amount = |
| if elem_size != 1 { fx.bcx.ins().imul_imm(count, elem_size as i64) } else { count }; |
| |
| // FIXME make the copy actually volatile when using emit_small_mem{cpy,move} |
| if intrinsic == sym::volatile_copy_nonoverlapping_memory { |
| // FIXME emit_small_memcpy |
| fx.bcx.call_memcpy(fx.target_config, dst, src, byte_amount); |
| } else { |
| // FIXME emit_small_memmove |
| fx.bcx.call_memmove(fx.target_config, dst, src, byte_amount); |
| } |
| } |
| sym::size_of_val => { |
| intrinsic_args!(fx, args => (ptr); intrinsic); |
| |
| let layout = fx.layout_of(generic_args.type_at(0)); |
| // Note: Can't use is_unsized here as truly unsized types need to take the fixed size |
| // branch |
| let meta = if let Abi::ScalarPair(_, _) = ptr.layout().abi { |
| Some(ptr.load_scalar_pair(fx).1) |
| } else { |
| None |
| }; |
| let (size, _align) = crate::unsize::size_and_align_of(fx, layout, meta); |
| ret.write_cvalue(fx, CValue::by_val(size, usize_layout)); |
| } |
| sym::min_align_of_val => { |
| intrinsic_args!(fx, args => (ptr); intrinsic); |
| |
| let layout = fx.layout_of(generic_args.type_at(0)); |
| // Note: Can't use is_unsized here as truly unsized types need to take the fixed size |
| // branch |
| let meta = if let Abi::ScalarPair(_, _) = ptr.layout().abi { |
| Some(ptr.load_scalar_pair(fx).1) |
| } else { |
| None |
| }; |
| let (_size, align) = crate::unsize::size_and_align_of(fx, layout, meta); |
| ret.write_cvalue(fx, CValue::by_val(align, usize_layout)); |
| } |
| |
| sym::vtable_size => { |
| intrinsic_args!(fx, args => (vtable); intrinsic); |
| let vtable = vtable.load_scalar(fx); |
| |
| let size = crate::vtable::size_of_obj(fx, vtable); |
| ret.write_cvalue(fx, CValue::by_val(size, usize_layout)); |
| } |
| |
| sym::vtable_align => { |
| intrinsic_args!(fx, args => (vtable); intrinsic); |
| let vtable = vtable.load_scalar(fx); |
| |
| let align = crate::vtable::min_align_of_obj(fx, vtable); |
| ret.write_cvalue(fx, CValue::by_val(align, usize_layout)); |
| } |
| |
| sym::exact_div => { |
| intrinsic_args!(fx, args => (x, y); intrinsic); |
| |
| // FIXME trap on inexact |
| let res = crate::num::codegen_int_binop(fx, BinOp::Div, x, y); |
| ret.write_cvalue(fx, res); |
| } |
| sym::saturating_add | sym::saturating_sub => { |
| intrinsic_args!(fx, args => (lhs, rhs); intrinsic); |
| |
| assert_eq!(lhs.layout().ty, rhs.layout().ty); |
| let bin_op = match intrinsic { |
| sym::saturating_add => BinOp::Add, |
| sym::saturating_sub => BinOp::Sub, |
| _ => unreachable!(), |
| }; |
| |
| let res = crate::num::codegen_saturating_int_binop(fx, bin_op, lhs, rhs); |
| ret.write_cvalue(fx, res); |
| } |
| sym::rotate_left => { |
| intrinsic_args!(fx, args => (x, y); intrinsic); |
| let y = y.load_scalar(fx); |
| |
| let layout = x.layout(); |
| let x = x.load_scalar(fx); |
| let res = fx.bcx.ins().rotl(x, y); |
| ret.write_cvalue(fx, CValue::by_val(res, layout)); |
| } |
| sym::rotate_right => { |
| intrinsic_args!(fx, args => (x, y); intrinsic); |
| let y = y.load_scalar(fx); |
| |
| let layout = x.layout(); |
| let x = x.load_scalar(fx); |
| let res = fx.bcx.ins().rotr(x, y); |
| ret.write_cvalue(fx, CValue::by_val(res, layout)); |
| } |
| |
| // The only difference between offset and arith_offset is regarding UB. Because Cranelift |
| // doesn't have UB both are codegen'ed the same way |
| sym::arith_offset => { |
| intrinsic_args!(fx, args => (base, offset); intrinsic); |
| let offset = offset.load_scalar(fx); |
| |
| let pointee_ty = base.layout().ty.builtin_deref(true).unwrap().ty; |
| let pointee_size = fx.layout_of(pointee_ty).size.bytes(); |
| let ptr_diff = if pointee_size != 1 { |
| fx.bcx.ins().imul_imm(offset, pointee_size as i64) |
| } else { |
| offset |
| }; |
| let base_val = base.load_scalar(fx); |
| let res = fx.bcx.ins().iadd(base_val, ptr_diff); |
| ret.write_cvalue(fx, CValue::by_val(res, base.layout())); |
| } |
| |
| sym::ptr_mask => { |
| intrinsic_args!(fx, args => (ptr, mask); intrinsic); |
| let ptr = ptr.load_scalar(fx); |
| let mask = mask.load_scalar(fx); |
| fx.bcx.ins().band(ptr, mask); |
| } |
| |
| sym::write_bytes | sym::volatile_set_memory => { |
| intrinsic_args!(fx, args => (dst, val, count); intrinsic); |
| let val = val.load_scalar(fx); |
| let count = count.load_scalar(fx); |
| |
| let pointee_ty = dst.layout().ty.builtin_deref(true).unwrap().ty; |
| let pointee_size = fx.layout_of(pointee_ty).size.bytes(); |
| let count = if pointee_size != 1 { |
| fx.bcx.ins().imul_imm(count, pointee_size as i64) |
| } else { |
| count |
| }; |
| let dst_ptr = dst.load_scalar(fx); |
| // FIXME make the memset actually volatile when switching to emit_small_memset |
| // FIXME use emit_small_memset |
| fx.bcx.call_memset(fx.target_config, dst_ptr, val, count); |
| } |
| sym::ctlz | sym::ctlz_nonzero => { |
| intrinsic_args!(fx, args => (arg); intrinsic); |
| let val = arg.load_scalar(fx); |
| |
| // FIXME trap on `ctlz_nonzero` with zero arg. |
| let res = fx.bcx.ins().clz(val); |
| let res = clif_intcast(fx, res, types::I32, false); |
| let res = CValue::by_val(res, ret.layout()); |
| ret.write_cvalue(fx, res); |
| } |
| sym::cttz | sym::cttz_nonzero => { |
| intrinsic_args!(fx, args => (arg); intrinsic); |
| let val = arg.load_scalar(fx); |
| |
| // FIXME trap on `cttz_nonzero` with zero arg. |
| let res = fx.bcx.ins().ctz(val); |
| let res = clif_intcast(fx, res, types::I32, false); |
| let res = CValue::by_val(res, ret.layout()); |
| ret.write_cvalue(fx, res); |
| } |
| sym::ctpop => { |
| intrinsic_args!(fx, args => (arg); intrinsic); |
| let val = arg.load_scalar(fx); |
| |
| let res = fx.bcx.ins().popcnt(val); |
| let res = clif_intcast(fx, res, types::I32, false); |
| let res = CValue::by_val(res, ret.layout()); |
| ret.write_cvalue(fx, res); |
| } |
| sym::bitreverse => { |
| intrinsic_args!(fx, args => (arg); intrinsic); |
| let val = arg.load_scalar(fx); |
| |
| let res = fx.bcx.ins().bitrev(val); |
| let res = CValue::by_val(res, arg.layout()); |
| ret.write_cvalue(fx, res); |
| } |
| sym::bswap => { |
| intrinsic_args!(fx, args => (arg); intrinsic); |
| let val = arg.load_scalar(fx); |
| |
| let res = if fx.bcx.func.dfg.value_type(val) == types::I8 { |
| val |
| } else { |
| fx.bcx.ins().bswap(val) |
| }; |
| let res = CValue::by_val(res, arg.layout()); |
| ret.write_cvalue(fx, res); |
| } |
| sym::assert_inhabited | sym::assert_zero_valid | sym::assert_mem_uninitialized_valid => { |
| intrinsic_args!(fx, args => (); intrinsic); |
| |
| let ty = generic_args.type_at(0); |
| |
| let requirement = ValidityRequirement::from_intrinsic(intrinsic); |
| |
| if let Some(requirement) = requirement { |
| let do_panic = !fx |
| .tcx |
| .check_validity_requirement((requirement, fx.param_env().and(ty))) |
| .expect("expect to have layout during codegen"); |
| |
| if do_panic { |
| let layout = fx.layout_of(ty); |
| let msg_str = with_no_visible_paths!({ |
| with_no_trimmed_paths!({ |
| if layout.abi.is_uninhabited() { |
| // Use this error even for the other intrinsics as it is more precise. |
| format!("attempted to instantiate uninhabited type `{}`", ty) |
| } else if intrinsic == sym::assert_zero_valid { |
| format!( |
| "attempted to zero-initialize type `{}`, which is invalid", |
| ty |
| ) |
| } else { |
| format!( |
| "attempted to leave type `{}` uninitialized, which is invalid", |
| ty |
| ) |
| } |
| }) |
| }); |
| crate::base::codegen_panic_nounwind(fx, &msg_str, Some(source_info.span)); |
| return Ok(()); |
| } |
| } |
| } |
| |
| sym::volatile_load | sym::unaligned_volatile_load => { |
| intrinsic_args!(fx, args => (ptr); intrinsic); |
| |
| // Cranelift treats loads as volatile by default |
| // FIXME correctly handle unaligned_volatile_load |
| let inner_layout = fx.layout_of(ptr.layout().ty.builtin_deref(true).unwrap().ty); |
| let val = CValue::by_ref(Pointer::new(ptr.load_scalar(fx)), inner_layout); |
| ret.write_cvalue(fx, val); |
| } |
| sym::volatile_store | sym::unaligned_volatile_store | sym::nontemporal_store => { |
| intrinsic_args!(fx, args => (ptr, val); intrinsic); |
| let ptr = ptr.load_scalar(fx); |
| |
| // Cranelift treats stores as volatile by default |
| // FIXME correctly handle unaligned_volatile_store |
| // FIXME actually do nontemporal stores if requested |
| let dest = CPlace::for_ptr(Pointer::new(ptr), val.layout()); |
| dest.write_cvalue(fx, val); |
| } |
| |
| sym::pref_align_of |
| | sym::needs_drop |
| | sym::type_id |
| | sym::type_name |
| | sym::variant_count => { |
| intrinsic_args!(fx, args => (); intrinsic); |
| |
| let const_val = fx |
| .tcx |
| .const_eval_instance(ParamEnv::reveal_all(), instance, source_info.span) |
| .unwrap(); |
| let val = crate::constant::codegen_const_value(fx, const_val, ret.layout().ty); |
| ret.write_cvalue(fx, val); |
| } |
| |
| sym::ptr_offset_from | sym::ptr_offset_from_unsigned => { |
| intrinsic_args!(fx, args => (ptr, base); intrinsic); |
| let ptr = ptr.load_scalar(fx); |
| let base = base.load_scalar(fx); |
| let ty = generic_args.type_at(0); |
| |
| let pointee_size: u64 = fx.layout_of(ty).size.bytes(); |
| let diff_bytes = fx.bcx.ins().isub(ptr, base); |
| // FIXME this can be an exact division. |
| let val = if intrinsic == sym::ptr_offset_from_unsigned { |
| let usize_layout = fx.layout_of(fx.tcx.types.usize); |
| // Because diff_bytes ULE isize::MAX, this would be fine as signed, |
| // but unsigned is slightly easier to codegen, so might as well. |
| CValue::by_val(fx.bcx.ins().udiv_imm(diff_bytes, pointee_size as i64), usize_layout) |
| } else { |
| let isize_layout = fx.layout_of(fx.tcx.types.isize); |
| CValue::by_val(fx.bcx.ins().sdiv_imm(diff_bytes, pointee_size as i64), isize_layout) |
| }; |
| ret.write_cvalue(fx, val); |
| } |
| |
| sym::caller_location => { |
| intrinsic_args!(fx, args => (); intrinsic); |
| |
| let caller_location = fx.get_caller_location(source_info); |
| ret.write_cvalue(fx, caller_location); |
| } |
| |
| _ if intrinsic.as_str().starts_with("atomic_fence") => { |
| intrinsic_args!(fx, args => (); intrinsic); |
| |
| fx.bcx.ins().fence(); |
| } |
| _ if intrinsic.as_str().starts_with("atomic_singlethreadfence") => { |
| intrinsic_args!(fx, args => (); intrinsic); |
| |
| // FIXME use a compiler fence once Cranelift supports it |
| fx.bcx.ins().fence(); |
| } |
| _ if intrinsic.as_str().starts_with("atomic_load") => { |
| intrinsic_args!(fx, args => (ptr); intrinsic); |
| let ptr = ptr.load_scalar(fx); |
| |
| let ty = generic_args.type_at(0); |
| match ty.kind() { |
| ty::Uint(UintTy::U128) | ty::Int(IntTy::I128) => { |
| // FIXME implement 128bit atomics |
| if fx.tcx.is_compiler_builtins(LOCAL_CRATE) { |
| // special case for compiler-builtins to avoid having to patch it |
| crate::trap::trap_unimplemented(fx, "128bit atomics not yet supported"); |
| return Ok(()); |
| } else { |
| fx.tcx |
| .dcx() |
| .span_fatal(source_info.span, "128bit atomics not yet supported"); |
| } |
| } |
| ty::Uint(_) | ty::Int(_) | ty::RawPtr(..) => {} |
| _ => { |
| report_atomic_type_validation_error(fx, intrinsic, source_info.span, ty); |
| return Ok(()); |
| } |
| } |
| let clif_ty = fx.clif_type(ty).unwrap(); |
| |
| let val = fx.bcx.ins().atomic_load(clif_ty, MemFlags::trusted(), ptr); |
| |
| let val = CValue::by_val(val, fx.layout_of(ty)); |
| ret.write_cvalue(fx, val); |
| } |
| _ if intrinsic.as_str().starts_with("atomic_store") => { |
| intrinsic_args!(fx, args => (ptr, val); intrinsic); |
| let ptr = ptr.load_scalar(fx); |
| |
| let ty = generic_args.type_at(0); |
| match ty.kind() { |
| ty::Uint(UintTy::U128) | ty::Int(IntTy::I128) => { |
| // FIXME implement 128bit atomics |
| if fx.tcx.is_compiler_builtins(LOCAL_CRATE) { |
| // special case for compiler-builtins to avoid having to patch it |
| crate::trap::trap_unimplemented(fx, "128bit atomics not yet supported"); |
| return Ok(()); |
| } else { |
| fx.tcx |
| .dcx() |
| .span_fatal(source_info.span, "128bit atomics not yet supported"); |
| } |
| } |
| ty::Uint(_) | ty::Int(_) | ty::RawPtr(..) => {} |
| _ => { |
| report_atomic_type_validation_error(fx, intrinsic, source_info.span, ty); |
| return Ok(()); |
| } |
| } |
| |
| let val = val.load_scalar(fx); |
| |
| fx.bcx.ins().atomic_store(MemFlags::trusted(), val, ptr); |
| } |
| _ if intrinsic.as_str().starts_with("atomic_xchg") => { |
| intrinsic_args!(fx, args => (ptr, new); intrinsic); |
| let ptr = ptr.load_scalar(fx); |
| |
| let layout = new.layout(); |
| match layout.ty.kind() { |
| ty::Uint(_) | ty::Int(_) | ty::RawPtr(..) => {} |
| _ => { |
| report_atomic_type_validation_error(fx, intrinsic, source_info.span, layout.ty); |
| return Ok(()); |
| } |
| } |
| let ty = fx.clif_type(layout.ty).unwrap(); |
| |
| let new = new.load_scalar(fx); |
| |
| let old = fx.bcx.ins().atomic_rmw(ty, MemFlags::trusted(), AtomicRmwOp::Xchg, ptr, new); |
| |
| let old = CValue::by_val(old, layout); |
| ret.write_cvalue(fx, old); |
| } |
| _ if intrinsic.as_str().starts_with("atomic_cxchg") => { |
| // both atomic_cxchg_* and atomic_cxchgweak_* |
| intrinsic_args!(fx, args => (ptr, test_old, new); intrinsic); |
| let ptr = ptr.load_scalar(fx); |
| |
| let layout = new.layout(); |
| match layout.ty.kind() { |
| ty::Uint(_) | ty::Int(_) | ty::RawPtr(..) => {} |
| _ => { |
| report_atomic_type_validation_error(fx, intrinsic, source_info.span, layout.ty); |
| return Ok(()); |
| } |
| } |
| |
| let test_old = test_old.load_scalar(fx); |
| let new = new.load_scalar(fx); |
| |
| let old = fx.bcx.ins().atomic_cas(MemFlags::trusted(), ptr, test_old, new); |
| let is_eq = fx.bcx.ins().icmp(IntCC::Equal, old, test_old); |
| |
| let ret_val = CValue::by_val_pair(old, is_eq, ret.layout()); |
| ret.write_cvalue(fx, ret_val) |
| } |
| |
| _ if intrinsic.as_str().starts_with("atomic_xadd") => { |
| intrinsic_args!(fx, args => (ptr, amount); intrinsic); |
| let ptr = ptr.load_scalar(fx); |
| |
| let layout = amount.layout(); |
| match layout.ty.kind() { |
| ty::Uint(_) | ty::Int(_) | ty::RawPtr(..) => {} |
| _ => { |
| report_atomic_type_validation_error(fx, intrinsic, source_info.span, layout.ty); |
| return Ok(()); |
| } |
| } |
| let ty = fx.clif_type(layout.ty).unwrap(); |
| |
| let amount = amount.load_scalar(fx); |
| |
| let old = |
| fx.bcx.ins().atomic_rmw(ty, MemFlags::trusted(), AtomicRmwOp::Add, ptr, amount); |
| |
| let old = CValue::by_val(old, layout); |
| ret.write_cvalue(fx, old); |
| } |
| _ if intrinsic.as_str().starts_with("atomic_xsub") => { |
| intrinsic_args!(fx, args => (ptr, amount); intrinsic); |
| let ptr = ptr.load_scalar(fx); |
| |
| let layout = amount.layout(); |
| match layout.ty.kind() { |
| ty::Uint(_) | ty::Int(_) | ty::RawPtr(..) => {} |
| _ => { |
| report_atomic_type_validation_error(fx, intrinsic, source_info.span, layout.ty); |
| return Ok(()); |
| } |
| } |
| let ty = fx.clif_type(layout.ty).unwrap(); |
| |
| let amount = amount.load_scalar(fx); |
| |
| let old = |
| fx.bcx.ins().atomic_rmw(ty, MemFlags::trusted(), AtomicRmwOp::Sub, ptr, amount); |
| |
| let old = CValue::by_val(old, layout); |
| ret.write_cvalue(fx, old); |
| } |
| _ if intrinsic.as_str().starts_with("atomic_and") => { |
| intrinsic_args!(fx, args => (ptr, src); intrinsic); |
| let ptr = ptr.load_scalar(fx); |
| |
| let layout = src.layout(); |
| match layout.ty.kind() { |
| ty::Uint(_) | ty::Int(_) | ty::RawPtr(..) => {} |
| _ => { |
| report_atomic_type_validation_error(fx, intrinsic, source_info.span, layout.ty); |
| return Ok(()); |
| } |
| } |
| let ty = fx.clif_type(layout.ty).unwrap(); |
| |
| let src = src.load_scalar(fx); |
| |
| let old = fx.bcx.ins().atomic_rmw(ty, MemFlags::trusted(), AtomicRmwOp::And, ptr, src); |
| |
| let old = CValue::by_val(old, layout); |
| ret.write_cvalue(fx, old); |
| } |
| _ if intrinsic.as_str().starts_with("atomic_or") => { |
| intrinsic_args!(fx, args => (ptr, src); intrinsic); |
| let ptr = ptr.load_scalar(fx); |
| |
| let layout = src.layout(); |
| match layout.ty.kind() { |
| ty::Uint(_) | ty::Int(_) | ty::RawPtr(..) => {} |
| _ => { |
| report_atomic_type_validation_error(fx, intrinsic, source_info.span, layout.ty); |
| return Ok(()); |
| } |
| } |
| let ty = fx.clif_type(layout.ty).unwrap(); |
| |
| let src = src.load_scalar(fx); |
| |
| let old = fx.bcx.ins().atomic_rmw(ty, MemFlags::trusted(), AtomicRmwOp::Or, ptr, src); |
| |
| let old = CValue::by_val(old, layout); |
| ret.write_cvalue(fx, old); |
| } |
| _ if intrinsic.as_str().starts_with("atomic_xor") => { |
| intrinsic_args!(fx, args => (ptr, src); intrinsic); |
| let ptr = ptr.load_scalar(fx); |
| |
| let layout = src.layout(); |
| match layout.ty.kind() { |
| ty::Uint(_) | ty::Int(_) | ty::RawPtr(..) => {} |
| _ => { |
| report_atomic_type_validation_error(fx, intrinsic, source_info.span, layout.ty); |
| return Ok(()); |
| } |
| } |
| let ty = fx.clif_type(layout.ty).unwrap(); |
| |
| let src = src.load_scalar(fx); |
| |
| let old = fx.bcx.ins().atomic_rmw(ty, MemFlags::trusted(), AtomicRmwOp::Xor, ptr, src); |
| |
| let old = CValue::by_val(old, layout); |
| ret.write_cvalue(fx, old); |
| } |
| _ if intrinsic.as_str().starts_with("atomic_nand") => { |
| intrinsic_args!(fx, args => (ptr, src); intrinsic); |
| let ptr = ptr.load_scalar(fx); |
| |
| let layout = src.layout(); |
| match layout.ty.kind() { |
| ty::Uint(_) | ty::Int(_) | ty::RawPtr(..) => {} |
| _ => { |
| report_atomic_type_validation_error(fx, intrinsic, source_info.span, layout.ty); |
| return Ok(()); |
| } |
| } |
| let ty = fx.clif_type(layout.ty).unwrap(); |
| |
| let src = src.load_scalar(fx); |
| |
| let old = fx.bcx.ins().atomic_rmw(ty, MemFlags::trusted(), AtomicRmwOp::Nand, ptr, src); |
| |
| let old = CValue::by_val(old, layout); |
| ret.write_cvalue(fx, old); |
| } |
| _ if intrinsic.as_str().starts_with("atomic_max") => { |
| intrinsic_args!(fx, args => (ptr, src); intrinsic); |
| let ptr = ptr.load_scalar(fx); |
| |
| let layout = src.layout(); |
| match layout.ty.kind() { |
| ty::Uint(_) | ty::Int(_) | ty::RawPtr(..) => {} |
| _ => { |
| report_atomic_type_validation_error(fx, intrinsic, source_info.span, layout.ty); |
| return Ok(()); |
| } |
| } |
| let ty = fx.clif_type(layout.ty).unwrap(); |
| |
| let src = src.load_scalar(fx); |
| |
| let old = fx.bcx.ins().atomic_rmw(ty, MemFlags::trusted(), AtomicRmwOp::Smax, ptr, src); |
| |
| let old = CValue::by_val(old, layout); |
| ret.write_cvalue(fx, old); |
| } |
| _ if intrinsic.as_str().starts_with("atomic_umax") => { |
| intrinsic_args!(fx, args => (ptr, src); intrinsic); |
| let ptr = ptr.load_scalar(fx); |
| |
| let layout = src.layout(); |
| match layout.ty.kind() { |
| ty::Uint(_) | ty::Int(_) | ty::RawPtr(..) => {} |
| _ => { |
| report_atomic_type_validation_error(fx, intrinsic, source_info.span, layout.ty); |
| return Ok(()); |
| } |
| } |
| let ty = fx.clif_type(layout.ty).unwrap(); |
| |
| let src = src.load_scalar(fx); |
| |
| let old = fx.bcx.ins().atomic_rmw(ty, MemFlags::trusted(), AtomicRmwOp::Umax, ptr, src); |
| |
| let old = CValue::by_val(old, layout); |
| ret.write_cvalue(fx, old); |
| } |
| _ if intrinsic.as_str().starts_with("atomic_min") => { |
| intrinsic_args!(fx, args => (ptr, src); intrinsic); |
| let ptr = ptr.load_scalar(fx); |
| |
| let layout = src.layout(); |
| match layout.ty.kind() { |
| ty::Uint(_) | ty::Int(_) | ty::RawPtr(..) => {} |
| _ => { |
| report_atomic_type_validation_error(fx, intrinsic, source_info.span, layout.ty); |
| return Ok(()); |
| } |
| } |
| let ty = fx.clif_type(layout.ty).unwrap(); |
| |
| let src = src.load_scalar(fx); |
| |
| let old = fx.bcx.ins().atomic_rmw(ty, MemFlags::trusted(), AtomicRmwOp::Smin, ptr, src); |
| |
| let old = CValue::by_val(old, layout); |
| ret.write_cvalue(fx, old); |
| } |
| _ if intrinsic.as_str().starts_with("atomic_umin") => { |
| intrinsic_args!(fx, args => (ptr, src); intrinsic); |
| let ptr = ptr.load_scalar(fx); |
| |
| let layout = src.layout(); |
| match layout.ty.kind() { |
| ty::Uint(_) | ty::Int(_) | ty::RawPtr(..) => {} |
| _ => { |
| report_atomic_type_validation_error(fx, intrinsic, source_info.span, layout.ty); |
| return Ok(()); |
| } |
| } |
| let ty = fx.clif_type(layout.ty).unwrap(); |
| |
| let src = src.load_scalar(fx); |
| |
| let old = fx.bcx.ins().atomic_rmw(ty, MemFlags::trusted(), AtomicRmwOp::Umin, ptr, src); |
| |
| let old = CValue::by_val(old, layout); |
| ret.write_cvalue(fx, old); |
| } |
| |
| sym::minnumf32 => { |
| intrinsic_args!(fx, args => (a, b); intrinsic); |
| let a = a.load_scalar(fx); |
| let b = b.load_scalar(fx); |
| |
| let val = crate::num::codegen_float_min(fx, a, b); |
| let val = CValue::by_val(val, fx.layout_of(fx.tcx.types.f32)); |
| ret.write_cvalue(fx, val); |
| } |
| sym::minnumf64 => { |
| intrinsic_args!(fx, args => (a, b); intrinsic); |
| let a = a.load_scalar(fx); |
| let b = b.load_scalar(fx); |
| |
| let val = crate::num::codegen_float_min(fx, a, b); |
| let val = CValue::by_val(val, fx.layout_of(fx.tcx.types.f64)); |
| ret.write_cvalue(fx, val); |
| } |
| sym::maxnumf32 => { |
| intrinsic_args!(fx, args => (a, b); intrinsic); |
| let a = a.load_scalar(fx); |
| let b = b.load_scalar(fx); |
| |
| let val = crate::num::codegen_float_max(fx, a, b); |
| let val = CValue::by_val(val, fx.layout_of(fx.tcx.types.f32)); |
| ret.write_cvalue(fx, val); |
| } |
| sym::maxnumf64 => { |
| intrinsic_args!(fx, args => (a, b); intrinsic); |
| let a = a.load_scalar(fx); |
| let b = b.load_scalar(fx); |
| |
| let val = crate::num::codegen_float_max(fx, a, b); |
| let val = CValue::by_val(val, fx.layout_of(fx.tcx.types.f64)); |
| ret.write_cvalue(fx, val); |
| } |
| |
| sym::catch_unwind => { |
| intrinsic_args!(fx, args => (f, data, catch_fn); intrinsic); |
| let f = f.load_scalar(fx); |
| let data = data.load_scalar(fx); |
| let _catch_fn = catch_fn.load_scalar(fx); |
| |
| // FIXME once unwinding is supported, change this to actually catch panics |
| let f_sig = fx.bcx.func.import_signature(Signature { |
| call_conv: fx.target_config.default_call_conv, |
| params: vec![AbiParam::new(pointer_ty(fx.tcx))], |
| returns: vec![], |
| }); |
| |
| fx.bcx.ins().call_indirect(f_sig, f, &[data]); |
| |
| let layout = fx.layout_of(fx.tcx.types.i32); |
| let ret_val = CValue::by_val(fx.bcx.ins().iconst(types::I32, 0), layout); |
| ret.write_cvalue(fx, ret_val); |
| } |
| |
| sym::fadd_fast |
| | sym::fsub_fast |
| | sym::fmul_fast |
| | sym::fdiv_fast |
| | sym::frem_fast |
| | sym::fadd_algebraic |
| | sym::fsub_algebraic |
| | sym::fmul_algebraic |
| | sym::fdiv_algebraic |
| | sym::frem_algebraic => { |
| intrinsic_args!(fx, args => (x, y); intrinsic); |
| |
| let res = crate::num::codegen_float_binop( |
| fx, |
| match intrinsic { |
| sym::fadd_fast | sym::fadd_algebraic => BinOp::Add, |
| sym::fsub_fast | sym::fsub_algebraic => BinOp::Sub, |
| sym::fmul_fast | sym::fmul_algebraic => BinOp::Mul, |
| sym::fdiv_fast | sym::fdiv_algebraic => BinOp::Div, |
| sym::frem_fast | sym::frem_algebraic => BinOp::Rem, |
| _ => unreachable!(), |
| }, |
| x, |
| y, |
| ); |
| ret.write_cvalue(fx, res); |
| } |
| sym::float_to_int_unchecked => { |
| intrinsic_args!(fx, args => (f); intrinsic); |
| let f = f.load_scalar(fx); |
| |
| let res = crate::cast::clif_int_or_float_cast( |
| fx, |
| f, |
| false, |
| fx.clif_type(ret.layout().ty).unwrap(), |
| type_sign(ret.layout().ty), |
| ); |
| ret.write_cvalue(fx, CValue::by_val(res, ret.layout())); |
| } |
| |
| sym::raw_eq => { |
| intrinsic_args!(fx, args => (lhs_ref, rhs_ref); intrinsic); |
| let lhs_ref = lhs_ref.load_scalar(fx); |
| let rhs_ref = rhs_ref.load_scalar(fx); |
| |
| let size = fx.layout_of(generic_args.type_at(0)).layout.size(); |
| // FIXME add and use emit_small_memcmp |
| let is_eq_value = if size == Size::ZERO { |
| // No bytes means they're trivially equal |
| fx.bcx.ins().iconst(types::I8, 1) |
| } else if let Some(clty) = size.bits().try_into().ok().and_then(Type::int) { |
| // Can't use `trusted` for these loads; they could be unaligned. |
| let mut flags = MemFlags::new(); |
| flags.set_notrap(); |
| let lhs_val = fx.bcx.ins().load(clty, flags, lhs_ref, 0); |
| let rhs_val = fx.bcx.ins().load(clty, flags, rhs_ref, 0); |
| fx.bcx.ins().icmp(IntCC::Equal, lhs_val, rhs_val) |
| } else { |
| // Just call `memcmp` (like slices do in core) when the |
| // size is too large or it's not a power-of-two. |
| let signed_bytes = i64::try_from(size.bytes()).unwrap(); |
| let bytes_val = fx.bcx.ins().iconst(fx.pointer_type, signed_bytes); |
| let params = vec![AbiParam::new(fx.pointer_type); 3]; |
| let returns = vec![AbiParam::new(types::I32)]; |
| let args = &[lhs_ref, rhs_ref, bytes_val]; |
| let cmp = fx.lib_call("memcmp", params, returns, args)[0]; |
| fx.bcx.ins().icmp_imm(IntCC::Equal, cmp, 0) |
| }; |
| ret.write_cvalue(fx, CValue::by_val(is_eq_value, ret.layout())); |
| } |
| |
| sym::compare_bytes => { |
| intrinsic_args!(fx, args => (lhs_ptr, rhs_ptr, bytes_val); intrinsic); |
| let lhs_ptr = lhs_ptr.load_scalar(fx); |
| let rhs_ptr = rhs_ptr.load_scalar(fx); |
| let bytes_val = bytes_val.load_scalar(fx); |
| |
| let params = vec![AbiParam::new(fx.pointer_type); 3]; |
| let returns = vec![AbiParam::new(types::I32)]; |
| let args = &[lhs_ptr, rhs_ptr, bytes_val]; |
| // Here we assume that the `memcmp` provided by the target is a NOP for size 0. |
| let cmp = fx.lib_call("memcmp", params, returns, args)[0]; |
| ret.write_cvalue(fx, CValue::by_val(cmp, ret.layout())); |
| } |
| |
| sym::black_box => { |
| intrinsic_args!(fx, args => (a); intrinsic); |
| |
| // FIXME implement black_box semantics |
| ret.write_cvalue(fx, a); |
| } |
| |
| // FIXME implement variadics in cranelift |
| sym::va_copy | sym::va_arg | sym::va_end => { |
| fx.tcx.dcx().span_fatal( |
| source_info.span, |
| "Defining variadic functions is not yet supported by Cranelift", |
| ); |
| } |
| |
| // Unimplemented intrinsics must have a fallback body. The fallback body is obtained |
| // by converting the `InstanceDef::Intrinsic` to an `InstanceDef::Item`. |
| _ => { |
| let intrinsic = fx.tcx.intrinsic(instance.def_id()).unwrap(); |
| if intrinsic.must_be_overridden { |
| span_bug!( |
| source_info.span, |
| "intrinsic {} must be overridden by codegen_cranelift, but isn't", |
| intrinsic.name, |
| ); |
| } |
| return Err(Instance::new(instance.def_id(), instance.args)); |
| } |
| } |
| |
| let ret_block = fx.get_block(destination.unwrap()); |
| fx.bcx.ins().jump(ret_block, &[]); |
| Ok(()) |
| } |
