| use std::assert_matches::assert_matches; |
| |
| use rustc_abi::{BackendRepr, Float, Integer, Primitive, Scalar}; |
| use rustc_ast::{InlineAsmOptions, InlineAsmTemplatePiece}; |
| use rustc_codegen_ssa::mir::operand::OperandValue; |
| use rustc_codegen_ssa::traits::*; |
| use rustc_data_structures::fx::FxHashMap; |
| use rustc_middle::ty::Instance; |
| use rustc_middle::ty::layout::TyAndLayout; |
| use rustc_middle::{bug, span_bug}; |
| use rustc_span::{Pos, Span, Symbol, sym}; |
| use rustc_target::asm::*; |
| use smallvec::SmallVec; |
| use tracing::debug; |
| |
| use crate::attributes; |
| use crate::builder::Builder; |
| use crate::common::Funclet; |
| use crate::context::CodegenCx; |
| use crate::llvm::{self, ToLlvmBool, Type, Value}; |
| use crate::type_of::LayoutLlvmExt; |
| |
| impl<'ll, 'tcx> AsmBuilderMethods<'tcx> for Builder<'_, 'll, 'tcx> { |
| fn codegen_inline_asm( |
| &mut self, |
| template: &[InlineAsmTemplatePiece], |
| operands: &[InlineAsmOperandRef<'tcx, Self>], |
| options: InlineAsmOptions, |
| line_spans: &[Span], |
| instance: Instance<'_>, |
| dest: Option<Self::BasicBlock>, |
| catch_funclet: Option<(Self::BasicBlock, Option<&Self::Funclet>)>, |
| ) { |
| let asm_arch = self.tcx.sess.asm_arch.unwrap(); |
| |
| // Collect the types of output operands |
| let mut constraints = vec![]; |
| let mut clobbers = vec![]; |
| let mut output_types = vec![]; |
| let mut op_idx = FxHashMap::default(); |
| let mut clobbered_x87 = false; |
| for (idx, op) in operands.iter().enumerate() { |
| match *op { |
| InlineAsmOperandRef::Out { reg, late, place } => { |
| let is_target_supported = |reg_class: InlineAsmRegClass| { |
| for &(_, feature) in reg_class.supported_types(asm_arch, true) { |
| if let Some(feature) = feature { |
| if self |
| .tcx |
| .asm_target_features(instance.def_id()) |
| .contains(&feature) |
| { |
| return true; |
| } |
| } else { |
| // Register class is unconditionally supported |
| return true; |
| } |
| } |
| false |
| }; |
| |
| let mut layout = None; |
| let ty = if let Some(ref place) = place { |
| layout = Some(&place.layout); |
| llvm_fixup_output_type(self.cx, reg.reg_class(), &place.layout, instance) |
| } else if matches!( |
| reg.reg_class(), |
| InlineAsmRegClass::X86( |
| X86InlineAsmRegClass::mmx_reg | X86InlineAsmRegClass::x87_reg |
| ) |
| ) { |
| // Special handling for x87/mmx registers: we always |
| // clobber the whole set if one register is marked as |
| // clobbered. This is due to the way LLVM handles the |
| // FP stack in inline assembly. |
| if !clobbered_x87 { |
| clobbered_x87 = true; |
| clobbers.push("~{st}".to_string()); |
| for i in 1..=7 { |
| clobbers.push(format!("~{{st({})}}", i)); |
| } |
| } |
| continue; |
| } else if !is_target_supported(reg.reg_class()) |
| || reg.reg_class().is_clobber_only(asm_arch, true) |
| { |
| // We turn discarded outputs into clobber constraints |
| // if the target feature needed by the register class is |
| // disabled. This is necessary otherwise LLVM will try |
| // to actually allocate a register for the dummy output. |
| assert_matches!(reg, InlineAsmRegOrRegClass::Reg(_)); |
| clobbers.push(format!("~{}", reg_to_llvm(reg, None))); |
| continue; |
| } else { |
| // If the output is discarded, we don't really care what |
| // type is used. We're just using this to tell LLVM to |
| // reserve the register. |
| dummy_output_type(self.cx, reg.reg_class()) |
| }; |
| output_types.push(ty); |
| op_idx.insert(idx, constraints.len()); |
| let prefix = if late { "=" } else { "=&" }; |
| constraints.push(format!("{}{}", prefix, reg_to_llvm(reg, layout))); |
| } |
| InlineAsmOperandRef::InOut { reg, late, in_value, out_place } => { |
| let layout = if let Some(ref out_place) = out_place { |
| &out_place.layout |
| } else { |
| // LLVM required tied operands to have the same type, |
| // so we just use the type of the input. |
| &in_value.layout |
| }; |
| let ty = llvm_fixup_output_type(self.cx, reg.reg_class(), layout, instance); |
| output_types.push(ty); |
| op_idx.insert(idx, constraints.len()); |
| let prefix = if late { "=" } else { "=&" }; |
| constraints.push(format!("{}{}", prefix, reg_to_llvm(reg, Some(layout)))); |
| } |
| _ => {} |
| } |
| } |
| |
| // Collect input operands |
| let mut inputs = vec![]; |
| for (idx, op) in operands.iter().enumerate() { |
| match *op { |
| InlineAsmOperandRef::In { reg, value } => { |
| let llval = llvm_fixup_input( |
| self, |
| value.immediate(), |
| reg.reg_class(), |
| &value.layout, |
| instance, |
| ); |
| inputs.push(llval); |
| op_idx.insert(idx, constraints.len()); |
| constraints.push(reg_to_llvm(reg, Some(&value.layout))); |
| } |
| InlineAsmOperandRef::InOut { reg, late, in_value, out_place: _ } => { |
| let value = llvm_fixup_input( |
| self, |
| in_value.immediate(), |
| reg.reg_class(), |
| &in_value.layout, |
| instance, |
| ); |
| inputs.push(value); |
| |
| // In the case of fixed registers, we have the choice of |
| // either using a tied operand or duplicating the constraint. |
| // We prefer the latter because it matches the behavior of |
| // Clang. |
| if late && matches!(reg, InlineAsmRegOrRegClass::Reg(_)) { |
| constraints.push(reg_to_llvm(reg, Some(&in_value.layout))); |
| } else { |
| constraints.push(format!("{}", op_idx[&idx])); |
| } |
| } |
| InlineAsmOperandRef::SymFn { instance } => { |
| inputs.push(self.cx.get_fn(instance)); |
| op_idx.insert(idx, constraints.len()); |
| constraints.push("s".to_string()); |
| } |
| InlineAsmOperandRef::SymStatic { def_id } => { |
| inputs.push(self.cx.get_static(def_id)); |
| op_idx.insert(idx, constraints.len()); |
| constraints.push("s".to_string()); |
| } |
| _ => {} |
| } |
| } |
| |
| // Build the template string |
| let mut labels = vec![]; |
| let mut template_str = String::new(); |
| for piece in template { |
| match *piece { |
| InlineAsmTemplatePiece::String(ref s) => { |
| if s.contains('$') { |
| for c in s.chars() { |
| if c == '$' { |
| template_str.push_str("$$"); |
| } else { |
| template_str.push(c); |
| } |
| } |
| } else { |
| template_str.push_str(s) |
| } |
| } |
| InlineAsmTemplatePiece::Placeholder { operand_idx, modifier, span: _ } => { |
| match operands[operand_idx] { |
| InlineAsmOperandRef::In { reg, .. } |
| | InlineAsmOperandRef::Out { reg, .. } |
| | InlineAsmOperandRef::InOut { reg, .. } => { |
| let modifier = modifier_to_llvm(asm_arch, reg.reg_class(), modifier); |
| if let Some(modifier) = modifier { |
| template_str.push_str(&format!( |
| "${{{}:{}}}", |
| op_idx[&operand_idx], modifier |
| )); |
| } else { |
| template_str.push_str(&format!("${{{}}}", op_idx[&operand_idx])); |
| } |
| } |
| InlineAsmOperandRef::Const { ref string } => { |
| // Const operands get injected directly into the template |
| template_str.push_str(string); |
| } |
| InlineAsmOperandRef::SymFn { .. } |
| | InlineAsmOperandRef::SymStatic { .. } => { |
| // Only emit the raw symbol name |
| template_str.push_str(&format!("${{{}:c}}", op_idx[&operand_idx])); |
| } |
| InlineAsmOperandRef::Label { label } => { |
| template_str.push_str(&format!("${{{}:l}}", constraints.len())); |
| constraints.push("!i".to_owned()); |
| labels.push(label); |
| } |
| } |
| } |
| } |
| } |
| |
| constraints.append(&mut clobbers); |
| if !options.contains(InlineAsmOptions::PRESERVES_FLAGS) { |
| match asm_arch { |
| InlineAsmArch::AArch64 | InlineAsmArch::Arm64EC | InlineAsmArch::Arm => { |
| constraints.push("~{cc}".to_string()); |
| } |
| InlineAsmArch::X86 | InlineAsmArch::X86_64 => { |
| constraints.extend_from_slice(&[ |
| "~{dirflag}".to_string(), |
| "~{fpsr}".to_string(), |
| "~{flags}".to_string(), |
| ]); |
| } |
| InlineAsmArch::RiscV32 | InlineAsmArch::RiscV64 => { |
| constraints.extend_from_slice(&[ |
| "~{fflags}".to_string(), |
| "~{vtype}".to_string(), |
| "~{vl}".to_string(), |
| "~{vxsat}".to_string(), |
| "~{vxrm}".to_string(), |
| ]); |
| } |
| InlineAsmArch::Avr => { |
| constraints.push("~{sreg}".to_string()); |
| } |
| InlineAsmArch::Nvptx64 => {} |
| InlineAsmArch::PowerPC | InlineAsmArch::PowerPC64 => {} |
| InlineAsmArch::Hexagon => {} |
| InlineAsmArch::LoongArch32 | InlineAsmArch::LoongArch64 => { |
| constraints.extend_from_slice(&[ |
| "~{$fcc0}".to_string(), |
| "~{$fcc1}".to_string(), |
| "~{$fcc2}".to_string(), |
| "~{$fcc3}".to_string(), |
| "~{$fcc4}".to_string(), |
| "~{$fcc5}".to_string(), |
| "~{$fcc6}".to_string(), |
| "~{$fcc7}".to_string(), |
| ]); |
| } |
| InlineAsmArch::Mips | InlineAsmArch::Mips64 => {} |
| InlineAsmArch::S390x => { |
| constraints.push("~{cc}".to_string()); |
| } |
| InlineAsmArch::Sparc | InlineAsmArch::Sparc64 => { |
| // In LLVM, ~{icc} represents icc and xcc in 64-bit code. |
| // https://github.com/llvm/llvm-project/blob/llvmorg-19.1.0/llvm/lib/Target/Sparc/SparcRegisterInfo.td#L64 |
| constraints.push("~{icc}".to_string()); |
| constraints.push("~{fcc0}".to_string()); |
| constraints.push("~{fcc1}".to_string()); |
| constraints.push("~{fcc2}".to_string()); |
| constraints.push("~{fcc3}".to_string()); |
| } |
| InlineAsmArch::SpirV => {} |
| InlineAsmArch::Wasm32 | InlineAsmArch::Wasm64 => {} |
| InlineAsmArch::Bpf => {} |
| InlineAsmArch::Msp430 => { |
| constraints.push("~{sr}".to_string()); |
| } |
| InlineAsmArch::M68k => { |
| constraints.push("~{ccr}".to_string()); |
| } |
| InlineAsmArch::CSKY => { |
| constraints.push("~{psr}".to_string()); |
| } |
| } |
| } |
| if !options.contains(InlineAsmOptions::NOMEM) { |
| // This is actually ignored by LLVM, but it's probably best to keep |
| // it just in case. LLVM instead uses the ReadOnly/ReadNone |
| // attributes on the call instruction to optimize. |
| constraints.push("~{memory}".to_string()); |
| } |
| let volatile = !options.contains(InlineAsmOptions::PURE); |
| let alignstack = !options.contains(InlineAsmOptions::NOSTACK); |
| let output_type = match &output_types[..] { |
| [] => self.type_void(), |
| [ty] => ty, |
| tys => self.type_struct(tys, false), |
| }; |
| let dialect = match asm_arch { |
| InlineAsmArch::X86 | InlineAsmArch::X86_64 |
| if !options.contains(InlineAsmOptions::ATT_SYNTAX) => |
| { |
| llvm::AsmDialect::Intel |
| } |
| _ => llvm::AsmDialect::Att, |
| }; |
| let result = inline_asm_call( |
| self, |
| &template_str, |
| &constraints.join(","), |
| &inputs, |
| output_type, |
| &labels, |
| volatile, |
| alignstack, |
| dialect, |
| line_spans, |
| options.contains(InlineAsmOptions::MAY_UNWIND), |
| dest, |
| catch_funclet, |
| ) |
| .unwrap_or_else(|| span_bug!(line_spans[0], "LLVM asm constraint validation failed")); |
| |
| let mut attrs = SmallVec::<[_; 2]>::new(); |
| if options.contains(InlineAsmOptions::PURE) { |
| if options.contains(InlineAsmOptions::NOMEM) { |
| attrs.push(llvm::MemoryEffects::None.create_attr(self.cx.llcx)); |
| } else if options.contains(InlineAsmOptions::READONLY) { |
| attrs.push(llvm::MemoryEffects::ReadOnly.create_attr(self.cx.llcx)); |
| } |
| attrs.push(llvm::AttributeKind::WillReturn.create_attr(self.cx.llcx)); |
| } else if options.contains(InlineAsmOptions::NOMEM) { |
| attrs.push(llvm::MemoryEffects::InaccessibleMemOnly.create_attr(self.cx.llcx)); |
| } else if options.contains(InlineAsmOptions::READONLY) { |
| attrs.push(llvm::MemoryEffects::ReadOnlyNotPure.create_attr(self.cx.llcx)); |
| } |
| attributes::apply_to_callsite(result, llvm::AttributePlace::Function, &{ attrs }); |
| |
| // Write results to outputs. We need to do this for all possible control flow. |
| // |
| // Note that `dest` maybe populated with unreachable_block when asm goto with outputs |
| // is used (because we need to codegen callbr which always needs a destination), so |
| // here we use the NORETURN option to determine if `dest` should be used. |
| for block in (if options.contains(InlineAsmOptions::NORETURN) { None } else { Some(dest) }) |
| .into_iter() |
| .chain(labels.iter().copied().map(Some)) |
| { |
| if let Some(block) = block { |
| self.switch_to_block(block); |
| } |
| |
| for (idx, op) in operands.iter().enumerate() { |
| if let InlineAsmOperandRef::Out { reg, place: Some(place), .. } |
| | InlineAsmOperandRef::InOut { reg, out_place: Some(place), .. } = *op |
| { |
| let value = if output_types.len() == 1 { |
| result |
| } else { |
| self.extract_value(result, op_idx[&idx] as u64) |
| }; |
| let value = |
| llvm_fixup_output(self, value, reg.reg_class(), &place.layout, instance); |
| OperandValue::Immediate(value).store(self, place); |
| } |
| } |
| } |
| } |
| } |
| |
| impl<'tcx> AsmCodegenMethods<'tcx> for CodegenCx<'_, 'tcx> { |
| fn codegen_global_asm( |
| &mut self, |
| template: &[InlineAsmTemplatePiece], |
| operands: &[GlobalAsmOperandRef<'tcx>], |
| options: InlineAsmOptions, |
| _line_spans: &[Span], |
| ) { |
| let asm_arch = self.tcx.sess.asm_arch.unwrap(); |
| |
| // Build the template string |
| let mut template_str = String::new(); |
| |
| // On X86 platforms there are two assembly syntaxes. Rust uses intel by default, |
| // but AT&T can be specified explicitly. |
| if matches!(asm_arch, InlineAsmArch::X86 | InlineAsmArch::X86_64) { |
| if options.contains(InlineAsmOptions::ATT_SYNTAX) { |
| template_str.push_str(".att_syntax\n") |
| } else { |
| template_str.push_str(".intel_syntax\n") |
| } |
| } |
| |
| for piece in template { |
| match *piece { |
| InlineAsmTemplatePiece::String(ref s) => template_str.push_str(s), |
| InlineAsmTemplatePiece::Placeholder { operand_idx, modifier: _, span: _ } => { |
| match operands[operand_idx] { |
| GlobalAsmOperandRef::Const { ref string } => { |
| // Const operands get injected directly into the |
| // template. Note that we don't need to escape $ |
| // here unlike normal inline assembly. |
| template_str.push_str(string); |
| } |
| GlobalAsmOperandRef::SymFn { instance } => { |
| let llval = self.get_fn(instance); |
| self.add_compiler_used_global(llval); |
| let symbol = llvm::build_string(|s| unsafe { |
| llvm::LLVMRustGetMangledName(llval, s); |
| }) |
| .expect("symbol is not valid UTF-8"); |
| template_str.push_str(&symbol); |
| } |
| GlobalAsmOperandRef::SymStatic { def_id } => { |
| let llval = self |
| .renamed_statics |
| .borrow() |
| .get(&def_id) |
| .copied() |
| .unwrap_or_else(|| self.get_static(def_id)); |
| self.add_compiler_used_global(llval); |
| let symbol = llvm::build_string(|s| unsafe { |
| llvm::LLVMRustGetMangledName(llval, s); |
| }) |
| .expect("symbol is not valid UTF-8"); |
| template_str.push_str(&symbol); |
| } |
| } |
| } |
| } |
| } |
| |
| // Just to play it safe, if intel was used, reset the assembly syntax to att. |
| if matches!(asm_arch, InlineAsmArch::X86 | InlineAsmArch::X86_64) |
| && !options.contains(InlineAsmOptions::ATT_SYNTAX) |
| { |
| template_str.push_str("\n.att_syntax\n"); |
| } |
| |
| llvm::append_module_inline_asm(self.llmod, template_str.as_bytes()); |
| } |
| |
| fn mangled_name(&self, instance: Instance<'tcx>) -> String { |
| let llval = self.get_fn(instance); |
| llvm::build_string(|s| unsafe { |
| llvm::LLVMRustGetMangledName(llval, s); |
| }) |
| .expect("symbol is not valid UTF-8") |
| } |
| } |
| |
| pub(crate) fn inline_asm_call<'ll>( |
| bx: &mut Builder<'_, 'll, '_>, |
| asm: &str, |
| cons: &str, |
| inputs: &[&'ll Value], |
| output: &'ll llvm::Type, |
| labels: &[&'ll llvm::BasicBlock], |
| volatile: bool, |
| alignstack: bool, |
| dia: llvm::AsmDialect, |
| line_spans: &[Span], |
| unwind: bool, |
| dest: Option<&'ll llvm::BasicBlock>, |
| catch_funclet: Option<(&'ll llvm::BasicBlock, Option<&Funclet<'ll>>)>, |
| ) -> Option<&'ll Value> { |
| let argtys = inputs |
| .iter() |
| .map(|v| { |
| debug!("Asm Input Type: {:?}", *v); |
| bx.cx.val_ty(*v) |
| }) |
| .collect::<Vec<_>>(); |
| |
| debug!("Asm Output Type: {:?}", output); |
| let fty = bx.cx.type_func(&argtys, output); |
| |
| // Ask LLVM to verify that the constraints are well-formed. |
| let constraints_ok = unsafe { llvm::LLVMRustInlineAsmVerify(fty, cons.as_ptr(), cons.len()) }; |
| debug!("constraint verification result: {:?}", constraints_ok); |
| if !constraints_ok { |
| // LLVM has detected an issue with our constraints, so bail out. |
| return None; |
| } |
| |
| let v = unsafe { |
| llvm::LLVMGetInlineAsm( |
| fty, |
| asm.as_ptr(), |
| asm.len(), |
| cons.as_ptr(), |
| cons.len(), |
| volatile.to_llvm_bool(), |
| alignstack.to_llvm_bool(), |
| dia, |
| unwind.to_llvm_bool(), |
| ) |
| }; |
| |
| let call = if !labels.is_empty() { |
| assert!(catch_funclet.is_none()); |
| bx.callbr(fty, None, None, v, inputs, dest.unwrap(), labels, None, None) |
| } else if let Some((catch, funclet)) = catch_funclet { |
| bx.invoke(fty, None, None, v, inputs, dest.unwrap(), catch, funclet, None) |
| } else { |
| bx.call(fty, None, None, v, inputs, None, None) |
| }; |
| |
| // Store mark in a metadata node so we can map LLVM errors |
| // back to source locations. See #17552. |
| let key = "srcloc"; |
| let kind = bx.get_md_kind_id(key); |
| |
| // `srcloc` contains one 64-bit integer for each line of assembly code, |
| // where the lower 32 bits hold the lo byte position and the upper 32 bits |
| // hold the hi byte position. |
| let mut srcloc = vec![]; |
| if dia == llvm::AsmDialect::Intel && line_spans.len() > 1 { |
| // LLVM inserts an extra line to add the ".intel_syntax", so add |
| // a dummy srcloc entry for it. |
| // |
| // Don't do this if we only have 1 line span since that may be |
| // due to the asm template string coming from a macro. LLVM will |
| // default to the first srcloc for lines that don't have an |
| // associated srcloc. |
| srcloc.push(llvm::LLVMValueAsMetadata(bx.const_u64(0))); |
| } |
| srcloc.extend(line_spans.iter().map(|span| { |
| llvm::LLVMValueAsMetadata( |
| bx.const_u64(u64::from(span.lo().to_u32()) | (u64::from(span.hi().to_u32()) << 32)), |
| ) |
| })); |
| bx.cx.set_metadata_node(call, kind, &srcloc); |
| |
| Some(call) |
| } |
| |
| /// If the register is an xmm/ymm/zmm register then return its index. |
| fn xmm_reg_index(reg: InlineAsmReg) -> Option<u32> { |
| use X86InlineAsmReg::*; |
| match reg { |
| InlineAsmReg::X86(reg) if reg as u32 >= xmm0 as u32 && reg as u32 <= xmm15 as u32 => { |
| Some(reg as u32 - xmm0 as u32) |
| } |
| InlineAsmReg::X86(reg) if reg as u32 >= ymm0 as u32 && reg as u32 <= ymm15 as u32 => { |
| Some(reg as u32 - ymm0 as u32) |
| } |
| InlineAsmReg::X86(reg) if reg as u32 >= zmm0 as u32 && reg as u32 <= zmm31 as u32 => { |
| Some(reg as u32 - zmm0 as u32) |
| } |
| _ => None, |
| } |
| } |
| |
| /// If the register is an AArch64 integer register then return its index. |
| fn a64_reg_index(reg: InlineAsmReg) -> Option<u32> { |
| match reg { |
| InlineAsmReg::AArch64(r) => r.reg_index(), |
| _ => None, |
| } |
| } |
| |
| /// If the register is an AArch64 vector register then return its index. |
| fn a64_vreg_index(reg: InlineAsmReg) -> Option<u32> { |
| match reg { |
| InlineAsmReg::AArch64(reg) => reg.vreg_index(), |
| _ => None, |
| } |
| } |
| |
| /// Converts a register class to an LLVM constraint code. |
| fn reg_to_llvm(reg: InlineAsmRegOrRegClass, layout: Option<&TyAndLayout<'_>>) -> String { |
| use InlineAsmRegClass::*; |
| match reg { |
| // For vector registers LLVM wants the register name to match the type size. |
| InlineAsmRegOrRegClass::Reg(reg) => { |
| if let Some(idx) = xmm_reg_index(reg) { |
| let class = if let Some(layout) = layout { |
| match layout.size.bytes() { |
| 64 => 'z', |
| 32 => 'y', |
| _ => 'x', |
| } |
| } else { |
| // We use f32 as the type for discarded outputs |
| 'x' |
| }; |
| format!("{{{}mm{}}}", class, idx) |
| } else if let Some(idx) = a64_reg_index(reg) { |
| let class = if let Some(layout) = layout { |
| match layout.size.bytes() { |
| 8 => 'x', |
| _ => 'w', |
| } |
| } else { |
| // We use i32 as the type for discarded outputs |
| 'w' |
| }; |
| if class == 'x' && reg == InlineAsmReg::AArch64(AArch64InlineAsmReg::x30) { |
| // LLVM doesn't recognize x30. use lr instead. |
| "{lr}".to_string() |
| } else { |
| format!("{{{}{}}}", class, idx) |
| } |
| } else if let Some(idx) = a64_vreg_index(reg) { |
| let class = if let Some(layout) = layout { |
| match layout.size.bytes() { |
| 16 => 'q', |
| 8 => 'd', |
| 4 => 's', |
| 2 => 'h', |
| 1 => 'd', // We fixup i8 to i8x8 |
| _ => unreachable!(), |
| } |
| } else { |
| // We use i64x2 as the type for discarded outputs |
| 'q' |
| }; |
| format!("{{{}{}}}", class, idx) |
| } else if reg == InlineAsmReg::Arm(ArmInlineAsmReg::r14) { |
| // LLVM doesn't recognize r14 |
| "{lr}".to_string() |
| } else { |
| format!("{{{}}}", reg.name()) |
| } |
| } |
| // The constraints can be retrieved from |
| // https://llvm.org/docs/LangRef.html#supported-constraint-code-list |
| InlineAsmRegOrRegClass::RegClass(reg) => match reg { |
| AArch64(AArch64InlineAsmRegClass::reg) => "r", |
| AArch64(AArch64InlineAsmRegClass::vreg) => "w", |
| AArch64(AArch64InlineAsmRegClass::vreg_low16) => "x", |
| AArch64(AArch64InlineAsmRegClass::preg) => unreachable!("clobber-only"), |
| Arm(ArmInlineAsmRegClass::reg) => "r", |
| Arm(ArmInlineAsmRegClass::sreg) |
| | Arm(ArmInlineAsmRegClass::dreg_low16) |
| | Arm(ArmInlineAsmRegClass::qreg_low8) => "t", |
| Arm(ArmInlineAsmRegClass::sreg_low16) |
| | Arm(ArmInlineAsmRegClass::dreg_low8) |
| | Arm(ArmInlineAsmRegClass::qreg_low4) => "x", |
| Arm(ArmInlineAsmRegClass::dreg) | Arm(ArmInlineAsmRegClass::qreg) => "w", |
| Hexagon(HexagonInlineAsmRegClass::reg) => "r", |
| Hexagon(HexagonInlineAsmRegClass::preg) => unreachable!("clobber-only"), |
| LoongArch(LoongArchInlineAsmRegClass::reg) => "r", |
| LoongArch(LoongArchInlineAsmRegClass::freg) => "f", |
| Mips(MipsInlineAsmRegClass::reg) => "r", |
| Mips(MipsInlineAsmRegClass::freg) => "f", |
| Nvptx(NvptxInlineAsmRegClass::reg16) => "h", |
| Nvptx(NvptxInlineAsmRegClass::reg32) => "r", |
| Nvptx(NvptxInlineAsmRegClass::reg64) => "l", |
| PowerPC(PowerPCInlineAsmRegClass::reg) => "r", |
| PowerPC(PowerPCInlineAsmRegClass::reg_nonzero) => "b", |
| PowerPC(PowerPCInlineAsmRegClass::freg) => "f", |
| PowerPC(PowerPCInlineAsmRegClass::vreg) => "v", |
| PowerPC(PowerPCInlineAsmRegClass::vsreg) => "^wa", |
| PowerPC( |
| PowerPCInlineAsmRegClass::cr |
| | PowerPCInlineAsmRegClass::ctr |
| | PowerPCInlineAsmRegClass::lr |
| | PowerPCInlineAsmRegClass::xer, |
| ) => { |
| unreachable!("clobber-only") |
| } |
| RiscV(RiscVInlineAsmRegClass::reg) => "r", |
| RiscV(RiscVInlineAsmRegClass::freg) => "f", |
| RiscV(RiscVInlineAsmRegClass::vreg) => unreachable!("clobber-only"), |
| X86(X86InlineAsmRegClass::reg) => "r", |
| X86(X86InlineAsmRegClass::reg_abcd) => "Q", |
| X86(X86InlineAsmRegClass::reg_byte) => "q", |
| X86(X86InlineAsmRegClass::xmm_reg) | X86(X86InlineAsmRegClass::ymm_reg) => "x", |
| X86(X86InlineAsmRegClass::zmm_reg) => "v", |
| X86(X86InlineAsmRegClass::kreg) => "^Yk", |
| X86( |
| X86InlineAsmRegClass::x87_reg |
| | X86InlineAsmRegClass::mmx_reg |
| | X86InlineAsmRegClass::kreg0 |
| | X86InlineAsmRegClass::tmm_reg, |
| ) => unreachable!("clobber-only"), |
| Wasm(WasmInlineAsmRegClass::local) => "r", |
| Bpf(BpfInlineAsmRegClass::reg) => "r", |
| Bpf(BpfInlineAsmRegClass::wreg) => "w", |
| Avr(AvrInlineAsmRegClass::reg) => "r", |
| Avr(AvrInlineAsmRegClass::reg_upper) => "d", |
| Avr(AvrInlineAsmRegClass::reg_pair) => "r", |
| Avr(AvrInlineAsmRegClass::reg_iw) => "w", |
| Avr(AvrInlineAsmRegClass::reg_ptr) => "e", |
| S390x(S390xInlineAsmRegClass::reg) => "r", |
| S390x(S390xInlineAsmRegClass::reg_addr) => "a", |
| S390x(S390xInlineAsmRegClass::freg) => "f", |
| S390x(S390xInlineAsmRegClass::vreg) => "v", |
| S390x(S390xInlineAsmRegClass::areg) => { |
| unreachable!("clobber-only") |
| } |
| Sparc(SparcInlineAsmRegClass::reg) => "r", |
| Sparc(SparcInlineAsmRegClass::yreg) => unreachable!("clobber-only"), |
| Msp430(Msp430InlineAsmRegClass::reg) => "r", |
| M68k(M68kInlineAsmRegClass::reg) => "r", |
| M68k(M68kInlineAsmRegClass::reg_addr) => "a", |
| M68k(M68kInlineAsmRegClass::reg_data) => "d", |
| CSKY(CSKYInlineAsmRegClass::reg) => "r", |
| CSKY(CSKYInlineAsmRegClass::freg) => "f", |
| SpirV(SpirVInlineAsmRegClass::reg) => bug!("LLVM backend does not support SPIR-V"), |
| Err => unreachable!(), |
| } |
| .to_string(), |
| } |
| } |
| |
| /// Converts a modifier into LLVM's equivalent modifier. |
| fn modifier_to_llvm( |
| arch: InlineAsmArch, |
| reg: InlineAsmRegClass, |
| modifier: Option<char>, |
| ) -> Option<char> { |
| use InlineAsmRegClass::*; |
| // The modifiers can be retrieved from |
| // https://llvm.org/docs/LangRef.html#asm-template-argument-modifiers |
| match reg { |
| AArch64(AArch64InlineAsmRegClass::reg) => modifier, |
| AArch64(AArch64InlineAsmRegClass::vreg) | AArch64(AArch64InlineAsmRegClass::vreg_low16) => { |
| if modifier == Some('v') { |
| None |
| } else { |
| modifier |
| } |
| } |
| AArch64(AArch64InlineAsmRegClass::preg) => unreachable!("clobber-only"), |
| Arm(ArmInlineAsmRegClass::reg) => None, |
| Arm(ArmInlineAsmRegClass::sreg) | Arm(ArmInlineAsmRegClass::sreg_low16) => None, |
| Arm(ArmInlineAsmRegClass::dreg) |
| | Arm(ArmInlineAsmRegClass::dreg_low16) |
| | Arm(ArmInlineAsmRegClass::dreg_low8) => Some('P'), |
| Arm(ArmInlineAsmRegClass::qreg) |
| | Arm(ArmInlineAsmRegClass::qreg_low8) |
| | Arm(ArmInlineAsmRegClass::qreg_low4) => { |
| if modifier.is_none() { |
| Some('q') |
| } else { |
| modifier |
| } |
| } |
| Hexagon(_) => None, |
| LoongArch(_) => None, |
| Mips(_) => None, |
| Nvptx(_) => None, |
| PowerPC(PowerPCInlineAsmRegClass::vsreg) => { |
| // The documentation for the 'x' modifier is missing for llvm, and the gcc |
| // documentation is simply "use this for any vsx argument". It is needed |
| // to ensure the correct vsx register number is used. |
| if modifier.is_none() { Some('x') } else { modifier } |
| } |
| PowerPC(_) => None, |
| RiscV(RiscVInlineAsmRegClass::reg) | RiscV(RiscVInlineAsmRegClass::freg) => None, |
| RiscV(RiscVInlineAsmRegClass::vreg) => unreachable!("clobber-only"), |
| X86(X86InlineAsmRegClass::reg) | X86(X86InlineAsmRegClass::reg_abcd) => match modifier { |
| None if arch == InlineAsmArch::X86_64 => Some('q'), |
| None => Some('k'), |
| Some('l') => Some('b'), |
| Some('h') => Some('h'), |
| Some('x') => Some('w'), |
| Some('e') => Some('k'), |
| Some('r') => Some('q'), |
| _ => unreachable!(), |
| }, |
| X86(X86InlineAsmRegClass::reg_byte) => None, |
| X86(reg @ X86InlineAsmRegClass::xmm_reg) |
| | X86(reg @ X86InlineAsmRegClass::ymm_reg) |
| | X86(reg @ X86InlineAsmRegClass::zmm_reg) => match (reg, modifier) { |
| (X86InlineAsmRegClass::xmm_reg, None) => Some('x'), |
| (X86InlineAsmRegClass::ymm_reg, None) => Some('t'), |
| (X86InlineAsmRegClass::zmm_reg, None) => Some('g'), |
| (_, Some('x')) => Some('x'), |
| (_, Some('y')) => Some('t'), |
| (_, Some('z')) => Some('g'), |
| _ => unreachable!(), |
| }, |
| X86(X86InlineAsmRegClass::kreg) => None, |
| X86( |
| X86InlineAsmRegClass::x87_reg |
| | X86InlineAsmRegClass::mmx_reg |
| | X86InlineAsmRegClass::kreg0 |
| | X86InlineAsmRegClass::tmm_reg, |
| ) => unreachable!("clobber-only"), |
| Wasm(WasmInlineAsmRegClass::local) => None, |
| Bpf(_) => None, |
| Avr(AvrInlineAsmRegClass::reg_pair) |
| | Avr(AvrInlineAsmRegClass::reg_iw) |
| | Avr(AvrInlineAsmRegClass::reg_ptr) => match modifier { |
| Some('h') => Some('B'), |
| Some('l') => Some('A'), |
| _ => None, |
| }, |
| Avr(_) => None, |
| S390x(_) => None, |
| Sparc(_) => None, |
| Msp430(_) => None, |
| SpirV(SpirVInlineAsmRegClass::reg) => bug!("LLVM backend does not support SPIR-V"), |
| M68k(_) => None, |
| CSKY(_) => None, |
| Err => unreachable!(), |
| } |
| } |
| |
| /// Type to use for outputs that are discarded. It doesn't really matter what |
| /// the type is, as long as it is valid for the constraint code. |
| fn dummy_output_type<'ll>(cx: &CodegenCx<'ll, '_>, reg: InlineAsmRegClass) -> &'ll Type { |
| use InlineAsmRegClass::*; |
| match reg { |
| AArch64(AArch64InlineAsmRegClass::reg) => cx.type_i32(), |
| AArch64(AArch64InlineAsmRegClass::vreg) | AArch64(AArch64InlineAsmRegClass::vreg_low16) => { |
| cx.type_vector(cx.type_i64(), 2) |
| } |
| AArch64(AArch64InlineAsmRegClass::preg) => unreachable!("clobber-only"), |
| Arm(ArmInlineAsmRegClass::reg) => cx.type_i32(), |
| Arm(ArmInlineAsmRegClass::sreg) | Arm(ArmInlineAsmRegClass::sreg_low16) => cx.type_f32(), |
| Arm(ArmInlineAsmRegClass::dreg) |
| | Arm(ArmInlineAsmRegClass::dreg_low16) |
| | Arm(ArmInlineAsmRegClass::dreg_low8) => cx.type_f64(), |
| Arm(ArmInlineAsmRegClass::qreg) |
| | Arm(ArmInlineAsmRegClass::qreg_low8) |
| | Arm(ArmInlineAsmRegClass::qreg_low4) => cx.type_vector(cx.type_i64(), 2), |
| Hexagon(HexagonInlineAsmRegClass::reg) => cx.type_i32(), |
| Hexagon(HexagonInlineAsmRegClass::preg) => unreachable!("clobber-only"), |
| LoongArch(LoongArchInlineAsmRegClass::reg) => cx.type_i32(), |
| LoongArch(LoongArchInlineAsmRegClass::freg) => cx.type_f32(), |
| Mips(MipsInlineAsmRegClass::reg) => cx.type_i32(), |
| Mips(MipsInlineAsmRegClass::freg) => cx.type_f32(), |
| Nvptx(NvptxInlineAsmRegClass::reg16) => cx.type_i16(), |
| Nvptx(NvptxInlineAsmRegClass::reg32) => cx.type_i32(), |
| Nvptx(NvptxInlineAsmRegClass::reg64) => cx.type_i64(), |
| PowerPC(PowerPCInlineAsmRegClass::reg) => cx.type_i32(), |
| PowerPC(PowerPCInlineAsmRegClass::reg_nonzero) => cx.type_i32(), |
| PowerPC(PowerPCInlineAsmRegClass::freg) => cx.type_f64(), |
| PowerPC(PowerPCInlineAsmRegClass::vreg) => cx.type_vector(cx.type_i32(), 4), |
| PowerPC(PowerPCInlineAsmRegClass::vsreg) => cx.type_vector(cx.type_i32(), 4), |
| PowerPC( |
| PowerPCInlineAsmRegClass::cr |
| | PowerPCInlineAsmRegClass::ctr |
| | PowerPCInlineAsmRegClass::lr |
| | PowerPCInlineAsmRegClass::xer, |
| ) => { |
| unreachable!("clobber-only") |
| } |
| RiscV(RiscVInlineAsmRegClass::reg) => cx.type_i32(), |
| RiscV(RiscVInlineAsmRegClass::freg) => cx.type_f32(), |
| RiscV(RiscVInlineAsmRegClass::vreg) => unreachable!("clobber-only"), |
| X86(X86InlineAsmRegClass::reg) | X86(X86InlineAsmRegClass::reg_abcd) => cx.type_i32(), |
| X86(X86InlineAsmRegClass::reg_byte) => cx.type_i8(), |
| X86(X86InlineAsmRegClass::xmm_reg) |
| | X86(X86InlineAsmRegClass::ymm_reg) |
| | X86(X86InlineAsmRegClass::zmm_reg) => cx.type_f32(), |
| X86(X86InlineAsmRegClass::kreg) => cx.type_i16(), |
| X86( |
| X86InlineAsmRegClass::x87_reg |
| | X86InlineAsmRegClass::mmx_reg |
| | X86InlineAsmRegClass::kreg0 |
| | X86InlineAsmRegClass::tmm_reg, |
| ) => unreachable!("clobber-only"), |
| Wasm(WasmInlineAsmRegClass::local) => cx.type_i32(), |
| Bpf(BpfInlineAsmRegClass::reg) => cx.type_i64(), |
| Bpf(BpfInlineAsmRegClass::wreg) => cx.type_i32(), |
| Avr(AvrInlineAsmRegClass::reg) => cx.type_i8(), |
| Avr(AvrInlineAsmRegClass::reg_upper) => cx.type_i8(), |
| Avr(AvrInlineAsmRegClass::reg_pair) => cx.type_i16(), |
| Avr(AvrInlineAsmRegClass::reg_iw) => cx.type_i16(), |
| Avr(AvrInlineAsmRegClass::reg_ptr) => cx.type_i16(), |
| S390x(S390xInlineAsmRegClass::reg | S390xInlineAsmRegClass::reg_addr) => cx.type_i32(), |
| S390x(S390xInlineAsmRegClass::freg) => cx.type_f64(), |
| S390x(S390xInlineAsmRegClass::vreg) => cx.type_vector(cx.type_i64(), 2), |
| S390x(S390xInlineAsmRegClass::areg) => { |
| unreachable!("clobber-only") |
| } |
| Sparc(SparcInlineAsmRegClass::reg) => cx.type_i32(), |
| Sparc(SparcInlineAsmRegClass::yreg) => unreachable!("clobber-only"), |
| Msp430(Msp430InlineAsmRegClass::reg) => cx.type_i16(), |
| M68k(M68kInlineAsmRegClass::reg) => cx.type_i32(), |
| M68k(M68kInlineAsmRegClass::reg_addr) => cx.type_i32(), |
| M68k(M68kInlineAsmRegClass::reg_data) => cx.type_i32(), |
| CSKY(CSKYInlineAsmRegClass::reg) => cx.type_i32(), |
| CSKY(CSKYInlineAsmRegClass::freg) => cx.type_f32(), |
| SpirV(SpirVInlineAsmRegClass::reg) => bug!("LLVM backend does not support SPIR-V"), |
| Err => unreachable!(), |
| } |
| } |
| |
| /// Helper function to get the LLVM type for a Scalar. Pointers are returned as |
| /// the equivalent integer type. |
| fn llvm_asm_scalar_type<'ll>(cx: &CodegenCx<'ll, '_>, scalar: Scalar) -> &'ll Type { |
| let dl = &cx.tcx.data_layout; |
| match scalar.primitive() { |
| Primitive::Int(Integer::I8, _) => cx.type_i8(), |
| Primitive::Int(Integer::I16, _) => cx.type_i16(), |
| Primitive::Int(Integer::I32, _) => cx.type_i32(), |
| Primitive::Int(Integer::I64, _) => cx.type_i64(), |
| Primitive::Float(Float::F16) => cx.type_f16(), |
| Primitive::Float(Float::F32) => cx.type_f32(), |
| Primitive::Float(Float::F64) => cx.type_f64(), |
| Primitive::Float(Float::F128) => cx.type_f128(), |
| // FIXME(erikdesjardins): handle non-default addrspace ptr sizes |
| Primitive::Pointer(_) => cx.type_from_integer(dl.ptr_sized_integer()), |
| _ => unreachable!(), |
| } |
| } |
| |
| fn any_target_feature_enabled( |
| cx: &CodegenCx<'_, '_>, |
| instance: Instance<'_>, |
| features: &[Symbol], |
| ) -> bool { |
| let enabled = cx.tcx.asm_target_features(instance.def_id()); |
| features.iter().any(|feat| enabled.contains(feat)) |
| } |
| |
| /// Fix up an input value to work around LLVM bugs. |
| fn llvm_fixup_input<'ll, 'tcx>( |
| bx: &mut Builder<'_, 'll, 'tcx>, |
| mut value: &'ll Value, |
| reg: InlineAsmRegClass, |
| layout: &TyAndLayout<'tcx>, |
| instance: Instance<'_>, |
| ) -> &'ll Value { |
| use InlineAsmRegClass::*; |
| let dl = &bx.tcx.data_layout; |
| match (reg, layout.backend_repr) { |
| (AArch64(AArch64InlineAsmRegClass::vreg), BackendRepr::Scalar(s)) => { |
| if let Primitive::Int(Integer::I8, _) = s.primitive() { |
| let vec_ty = bx.cx.type_vector(bx.cx.type_i8(), 8); |
| bx.insert_element(bx.const_undef(vec_ty), value, bx.const_i32(0)) |
| } else { |
| value |
| } |
| } |
| (AArch64(AArch64InlineAsmRegClass::vreg_low16), BackendRepr::Scalar(s)) |
| if s.primitive() != Primitive::Float(Float::F128) => |
| { |
| let elem_ty = llvm_asm_scalar_type(bx.cx, s); |
| let count = 16 / layout.size.bytes(); |
| let vec_ty = bx.cx.type_vector(elem_ty, count); |
| // FIXME(erikdesjardins): handle non-default addrspace ptr sizes |
| if let Primitive::Pointer(_) = s.primitive() { |
| let t = bx.type_from_integer(dl.ptr_sized_integer()); |
| value = bx.ptrtoint(value, t); |
| } |
| bx.insert_element(bx.const_undef(vec_ty), value, bx.const_i32(0)) |
| } |
| ( |
| AArch64(AArch64InlineAsmRegClass::vreg_low16), |
| BackendRepr::SimdVector { element, count }, |
| ) if layout.size.bytes() == 8 => { |
| let elem_ty = llvm_asm_scalar_type(bx.cx, element); |
| let vec_ty = bx.cx.type_vector(elem_ty, count); |
| let indices: Vec<_> = (0..count * 2).map(|x| bx.const_i32(x as i32)).collect(); |
| bx.shuffle_vector(value, bx.const_undef(vec_ty), bx.const_vector(&indices)) |
| } |
| (X86(X86InlineAsmRegClass::reg_abcd), BackendRepr::Scalar(s)) |
| if s.primitive() == Primitive::Float(Float::F64) => |
| { |
| bx.bitcast(value, bx.cx.type_i64()) |
| } |
| ( |
| X86(X86InlineAsmRegClass::xmm_reg | X86InlineAsmRegClass::zmm_reg), |
| BackendRepr::SimdVector { .. }, |
| ) if layout.size.bytes() == 64 => bx.bitcast(value, bx.cx.type_vector(bx.cx.type_f64(), 8)), |
| ( |
| X86( |
| X86InlineAsmRegClass::xmm_reg |
| | X86InlineAsmRegClass::ymm_reg |
| | X86InlineAsmRegClass::zmm_reg, |
| ), |
| BackendRepr::Scalar(s), |
| ) if bx.sess().asm_arch == Some(InlineAsmArch::X86) |
| && s.primitive() == Primitive::Float(Float::F128) => |
| { |
| bx.bitcast(value, bx.type_vector(bx.type_i32(), 4)) |
| } |
| ( |
| X86( |
| X86InlineAsmRegClass::xmm_reg |
| | X86InlineAsmRegClass::ymm_reg |
| | X86InlineAsmRegClass::zmm_reg, |
| ), |
| BackendRepr::Scalar(s), |
| ) if s.primitive() == Primitive::Float(Float::F16) => { |
| let value = bx.insert_element( |
| bx.const_undef(bx.type_vector(bx.type_f16(), 8)), |
| value, |
| bx.const_usize(0), |
| ); |
| bx.bitcast(value, bx.type_vector(bx.type_i16(), 8)) |
| } |
| ( |
| X86( |
| X86InlineAsmRegClass::xmm_reg |
| | X86InlineAsmRegClass::ymm_reg |
| | X86InlineAsmRegClass::zmm_reg, |
| ), |
| BackendRepr::SimdVector { element, count: count @ (8 | 16) }, |
| ) if element.primitive() == Primitive::Float(Float::F16) => { |
| bx.bitcast(value, bx.type_vector(bx.type_i16(), count)) |
| } |
| ( |
| Arm(ArmInlineAsmRegClass::sreg | ArmInlineAsmRegClass::sreg_low16), |
| BackendRepr::Scalar(s), |
| ) => { |
| if let Primitive::Int(Integer::I32, _) = s.primitive() { |
| bx.bitcast(value, bx.cx.type_f32()) |
| } else { |
| value |
| } |
| } |
| ( |
| Arm( |
| ArmInlineAsmRegClass::dreg |
| | ArmInlineAsmRegClass::dreg_low8 |
| | ArmInlineAsmRegClass::dreg_low16, |
| ), |
| BackendRepr::Scalar(s), |
| ) => { |
| if let Primitive::Int(Integer::I64, _) = s.primitive() { |
| bx.bitcast(value, bx.cx.type_f64()) |
| } else { |
| value |
| } |
| } |
| ( |
| Arm( |
| ArmInlineAsmRegClass::dreg |
| | ArmInlineAsmRegClass::dreg_low8 |
| | ArmInlineAsmRegClass::dreg_low16 |
| | ArmInlineAsmRegClass::qreg |
| | ArmInlineAsmRegClass::qreg_low4 |
| | ArmInlineAsmRegClass::qreg_low8, |
| ), |
| BackendRepr::SimdVector { element, count: count @ (4 | 8) }, |
| ) if element.primitive() == Primitive::Float(Float::F16) => { |
| bx.bitcast(value, bx.type_vector(bx.type_i16(), count)) |
| } |
| (LoongArch(LoongArchInlineAsmRegClass::freg), BackendRepr::Scalar(s)) |
| if s.primitive() == Primitive::Float(Float::F16) => |
| { |
| // Smaller floats are always "NaN-boxed" inside larger floats on LoongArch. |
| let value = bx.bitcast(value, bx.type_i16()); |
| let value = bx.zext(value, bx.type_i32()); |
| let value = bx.or(value, bx.const_u32(0xFFFF_0000)); |
| bx.bitcast(value, bx.type_f32()) |
| } |
| (Mips(MipsInlineAsmRegClass::reg), BackendRepr::Scalar(s)) => { |
| match s.primitive() { |
| // MIPS only supports register-length arithmetics. |
| Primitive::Int(Integer::I8 | Integer::I16, _) => bx.zext(value, bx.cx.type_i32()), |
| Primitive::Float(Float::F32) => bx.bitcast(value, bx.cx.type_i32()), |
| Primitive::Float(Float::F64) => bx.bitcast(value, bx.cx.type_i64()), |
| _ => value, |
| } |
| } |
| (RiscV(RiscVInlineAsmRegClass::freg), BackendRepr::Scalar(s)) |
| if s.primitive() == Primitive::Float(Float::F16) |
| && !any_target_feature_enabled(bx, instance, &[sym::zfhmin, sym::zfh]) => |
| { |
| // Smaller floats are always "NaN-boxed" inside larger floats on RISC-V. |
| let value = bx.bitcast(value, bx.type_i16()); |
| let value = bx.zext(value, bx.type_i32()); |
| let value = bx.or(value, bx.const_u32(0xFFFF_0000)); |
| bx.bitcast(value, bx.type_f32()) |
| } |
| ( |
| PowerPC(PowerPCInlineAsmRegClass::vreg | PowerPCInlineAsmRegClass::vsreg), |
| BackendRepr::Scalar(s), |
| ) if s.primitive() == Primitive::Float(Float::F32) => { |
| let value = bx.insert_element( |
| bx.const_undef(bx.type_vector(bx.type_f32(), 4)), |
| value, |
| bx.const_usize(0), |
| ); |
| bx.bitcast(value, bx.type_vector(bx.type_f32(), 4)) |
| } |
| ( |
| PowerPC(PowerPCInlineAsmRegClass::vreg | PowerPCInlineAsmRegClass::vsreg), |
| BackendRepr::Scalar(s), |
| ) if s.primitive() == Primitive::Float(Float::F64) => { |
| let value = bx.insert_element( |
| bx.const_undef(bx.type_vector(bx.type_f64(), 2)), |
| value, |
| bx.const_usize(0), |
| ); |
| bx.bitcast(value, bx.type_vector(bx.type_f64(), 2)) |
| } |
| _ => value, |
| } |
| } |
| |
| /// Fix up an output value to work around LLVM bugs. |
| fn llvm_fixup_output<'ll, 'tcx>( |
| bx: &mut Builder<'_, 'll, 'tcx>, |
| mut value: &'ll Value, |
| reg: InlineAsmRegClass, |
| layout: &TyAndLayout<'tcx>, |
| instance: Instance<'_>, |
| ) -> &'ll Value { |
| use InlineAsmRegClass::*; |
| match (reg, layout.backend_repr) { |
| (AArch64(AArch64InlineAsmRegClass::vreg), BackendRepr::Scalar(s)) => { |
| if let Primitive::Int(Integer::I8, _) = s.primitive() { |
| bx.extract_element(value, bx.const_i32(0)) |
| } else { |
| value |
| } |
| } |
| (AArch64(AArch64InlineAsmRegClass::vreg_low16), BackendRepr::Scalar(s)) |
| if s.primitive() != Primitive::Float(Float::F128) => |
| { |
| value = bx.extract_element(value, bx.const_i32(0)); |
| if let Primitive::Pointer(_) = s.primitive() { |
| value = bx.inttoptr(value, layout.llvm_type(bx.cx)); |
| } |
| value |
| } |
| ( |
| AArch64(AArch64InlineAsmRegClass::vreg_low16), |
| BackendRepr::SimdVector { element, count }, |
| ) if layout.size.bytes() == 8 => { |
| let elem_ty = llvm_asm_scalar_type(bx.cx, element); |
| let vec_ty = bx.cx.type_vector(elem_ty, count * 2); |
| let indices: Vec<_> = (0..count).map(|x| bx.const_i32(x as i32)).collect(); |
| bx.shuffle_vector(value, bx.const_undef(vec_ty), bx.const_vector(&indices)) |
| } |
| (X86(X86InlineAsmRegClass::reg_abcd), BackendRepr::Scalar(s)) |
| if s.primitive() == Primitive::Float(Float::F64) => |
| { |
| bx.bitcast(value, bx.cx.type_f64()) |
| } |
| ( |
| X86(X86InlineAsmRegClass::xmm_reg | X86InlineAsmRegClass::zmm_reg), |
| BackendRepr::SimdVector { .. }, |
| ) if layout.size.bytes() == 64 => bx.bitcast(value, layout.llvm_type(bx.cx)), |
| ( |
| X86( |
| X86InlineAsmRegClass::xmm_reg |
| | X86InlineAsmRegClass::ymm_reg |
| | X86InlineAsmRegClass::zmm_reg, |
| ), |
| BackendRepr::Scalar(s), |
| ) if bx.sess().asm_arch == Some(InlineAsmArch::X86) |
| && s.primitive() == Primitive::Float(Float::F128) => |
| { |
| bx.bitcast(value, bx.type_f128()) |
| } |
| ( |
| X86( |
| X86InlineAsmRegClass::xmm_reg |
| | X86InlineAsmRegClass::ymm_reg |
| | X86InlineAsmRegClass::zmm_reg, |
| ), |
| BackendRepr::Scalar(s), |
| ) if s.primitive() == Primitive::Float(Float::F16) => { |
| let value = bx.bitcast(value, bx.type_vector(bx.type_f16(), 8)); |
| bx.extract_element(value, bx.const_usize(0)) |
| } |
| ( |
| X86( |
| X86InlineAsmRegClass::xmm_reg |
| | X86InlineAsmRegClass::ymm_reg |
| | X86InlineAsmRegClass::zmm_reg, |
| ), |
| BackendRepr::SimdVector { element, count: count @ (8 | 16) }, |
| ) if element.primitive() == Primitive::Float(Float::F16) => { |
| bx.bitcast(value, bx.type_vector(bx.type_f16(), count)) |
| } |
| ( |
| Arm(ArmInlineAsmRegClass::sreg | ArmInlineAsmRegClass::sreg_low16), |
| BackendRepr::Scalar(s), |
| ) => { |
| if let Primitive::Int(Integer::I32, _) = s.primitive() { |
| bx.bitcast(value, bx.cx.type_i32()) |
| } else { |
| value |
| } |
| } |
| ( |
| Arm( |
| ArmInlineAsmRegClass::dreg |
| | ArmInlineAsmRegClass::dreg_low8 |
| | ArmInlineAsmRegClass::dreg_low16, |
| ), |
| BackendRepr::Scalar(s), |
| ) => { |
| if let Primitive::Int(Integer::I64, _) = s.primitive() { |
| bx.bitcast(value, bx.cx.type_i64()) |
| } else { |
| value |
| } |
| } |
| ( |
| Arm( |
| ArmInlineAsmRegClass::dreg |
| | ArmInlineAsmRegClass::dreg_low8 |
| | ArmInlineAsmRegClass::dreg_low16 |
| | ArmInlineAsmRegClass::qreg |
| | ArmInlineAsmRegClass::qreg_low4 |
| | ArmInlineAsmRegClass::qreg_low8, |
| ), |
| BackendRepr::SimdVector { element, count: count @ (4 | 8) }, |
| ) if element.primitive() == Primitive::Float(Float::F16) => { |
| bx.bitcast(value, bx.type_vector(bx.type_f16(), count)) |
| } |
| (LoongArch(LoongArchInlineAsmRegClass::freg), BackendRepr::Scalar(s)) |
| if s.primitive() == Primitive::Float(Float::F16) => |
| { |
| let value = bx.bitcast(value, bx.type_i32()); |
| let value = bx.trunc(value, bx.type_i16()); |
| bx.bitcast(value, bx.type_f16()) |
| } |
| (Mips(MipsInlineAsmRegClass::reg), BackendRepr::Scalar(s)) => { |
| match s.primitive() { |
| // MIPS only supports register-length arithmetics. |
| Primitive::Int(Integer::I8, _) => bx.trunc(value, bx.cx.type_i8()), |
| Primitive::Int(Integer::I16, _) => bx.trunc(value, bx.cx.type_i16()), |
| Primitive::Float(Float::F32) => bx.bitcast(value, bx.cx.type_f32()), |
| Primitive::Float(Float::F64) => bx.bitcast(value, bx.cx.type_f64()), |
| _ => value, |
| } |
| } |
| (RiscV(RiscVInlineAsmRegClass::freg), BackendRepr::Scalar(s)) |
| if s.primitive() == Primitive::Float(Float::F16) |
| && !any_target_feature_enabled(bx, instance, &[sym::zfhmin, sym::zfh]) => |
| { |
| let value = bx.bitcast(value, bx.type_i32()); |
| let value = bx.trunc(value, bx.type_i16()); |
| bx.bitcast(value, bx.type_f16()) |
| } |
| ( |
| PowerPC(PowerPCInlineAsmRegClass::vreg | PowerPCInlineAsmRegClass::vsreg), |
| BackendRepr::Scalar(s), |
| ) if s.primitive() == Primitive::Float(Float::F32) => { |
| let value = bx.bitcast(value, bx.type_vector(bx.type_f32(), 4)); |
| bx.extract_element(value, bx.const_usize(0)) |
| } |
| ( |
| PowerPC(PowerPCInlineAsmRegClass::vreg | PowerPCInlineAsmRegClass::vsreg), |
| BackendRepr::Scalar(s), |
| ) if s.primitive() == Primitive::Float(Float::F64) => { |
| let value = bx.bitcast(value, bx.type_vector(bx.type_f64(), 2)); |
| bx.extract_element(value, bx.const_usize(0)) |
| } |
| _ => value, |
| } |
| } |
| |
| /// Output type to use for llvm_fixup_output. |
| fn llvm_fixup_output_type<'ll, 'tcx>( |
| cx: &CodegenCx<'ll, 'tcx>, |
| reg: InlineAsmRegClass, |
| layout: &TyAndLayout<'tcx>, |
| instance: Instance<'_>, |
| ) -> &'ll Type { |
| use InlineAsmRegClass::*; |
| match (reg, layout.backend_repr) { |
| (AArch64(AArch64InlineAsmRegClass::vreg), BackendRepr::Scalar(s)) => { |
| if let Primitive::Int(Integer::I8, _) = s.primitive() { |
| cx.type_vector(cx.type_i8(), 8) |
| } else { |
| layout.llvm_type(cx) |
| } |
| } |
| (AArch64(AArch64InlineAsmRegClass::vreg_low16), BackendRepr::Scalar(s)) |
| if s.primitive() != Primitive::Float(Float::F128) => |
| { |
| let elem_ty = llvm_asm_scalar_type(cx, s); |
| let count = 16 / layout.size.bytes(); |
| cx.type_vector(elem_ty, count) |
| } |
| ( |
| AArch64(AArch64InlineAsmRegClass::vreg_low16), |
| BackendRepr::SimdVector { element, count }, |
| ) if layout.size.bytes() == 8 => { |
| let elem_ty = llvm_asm_scalar_type(cx, element); |
| cx.type_vector(elem_ty, count * 2) |
| } |
| (X86(X86InlineAsmRegClass::reg_abcd), BackendRepr::Scalar(s)) |
| if s.primitive() == Primitive::Float(Float::F64) => |
| { |
| cx.type_i64() |
| } |
| ( |
| X86(X86InlineAsmRegClass::xmm_reg | X86InlineAsmRegClass::zmm_reg), |
| BackendRepr::SimdVector { .. }, |
| ) if layout.size.bytes() == 64 => cx.type_vector(cx.type_f64(), 8), |
| ( |
| X86( |
| X86InlineAsmRegClass::xmm_reg |
| | X86InlineAsmRegClass::ymm_reg |
| | X86InlineAsmRegClass::zmm_reg, |
| ), |
| BackendRepr::Scalar(s), |
| ) if cx.sess().asm_arch == Some(InlineAsmArch::X86) |
| && s.primitive() == Primitive::Float(Float::F128) => |
| { |
| cx.type_vector(cx.type_i32(), 4) |
| } |
| ( |
| X86( |
| X86InlineAsmRegClass::xmm_reg |
| | X86InlineAsmRegClass::ymm_reg |
| | X86InlineAsmRegClass::zmm_reg, |
| ), |
| BackendRepr::Scalar(s), |
| ) if s.primitive() == Primitive::Float(Float::F16) => cx.type_vector(cx.type_i16(), 8), |
| ( |
| X86( |
| X86InlineAsmRegClass::xmm_reg |
| | X86InlineAsmRegClass::ymm_reg |
| | X86InlineAsmRegClass::zmm_reg, |
| ), |
| BackendRepr::SimdVector { element, count: count @ (8 | 16) }, |
| ) if element.primitive() == Primitive::Float(Float::F16) => { |
| cx.type_vector(cx.type_i16(), count) |
| } |
| ( |
| Arm(ArmInlineAsmRegClass::sreg | ArmInlineAsmRegClass::sreg_low16), |
| BackendRepr::Scalar(s), |
| ) => { |
| if let Primitive::Int(Integer::I32, _) = s.primitive() { |
| cx.type_f32() |
| } else { |
| layout.llvm_type(cx) |
| } |
| } |
| ( |
| Arm( |
| ArmInlineAsmRegClass::dreg |
| | ArmInlineAsmRegClass::dreg_low8 |
| | ArmInlineAsmRegClass::dreg_low16, |
| ), |
| BackendRepr::Scalar(s), |
| ) => { |
| if let Primitive::Int(Integer::I64, _) = s.primitive() { |
| cx.type_f64() |
| } else { |
| layout.llvm_type(cx) |
| } |
| } |
| ( |
| Arm( |
| ArmInlineAsmRegClass::dreg |
| | ArmInlineAsmRegClass::dreg_low8 |
| | ArmInlineAsmRegClass::dreg_low16 |
| | ArmInlineAsmRegClass::qreg |
| | ArmInlineAsmRegClass::qreg_low4 |
| | ArmInlineAsmRegClass::qreg_low8, |
| ), |
| BackendRepr::SimdVector { element, count: count @ (4 | 8) }, |
| ) if element.primitive() == Primitive::Float(Float::F16) => { |
| cx.type_vector(cx.type_i16(), count) |
| } |
| (LoongArch(LoongArchInlineAsmRegClass::freg), BackendRepr::Scalar(s)) |
| if s.primitive() == Primitive::Float(Float::F16) => |
| { |
| cx.type_f32() |
| } |
| (Mips(MipsInlineAsmRegClass::reg), BackendRepr::Scalar(s)) => { |
| match s.primitive() { |
| // MIPS only supports register-length arithmetics. |
| Primitive::Int(Integer::I8 | Integer::I16, _) => cx.type_i32(), |
| Primitive::Float(Float::F32) => cx.type_i32(), |
| Primitive::Float(Float::F64) => cx.type_i64(), |
| _ => layout.llvm_type(cx), |
| } |
| } |
| (RiscV(RiscVInlineAsmRegClass::freg), BackendRepr::Scalar(s)) |
| if s.primitive() == Primitive::Float(Float::F16) |
| && !any_target_feature_enabled(cx, instance, &[sym::zfhmin, sym::zfh]) => |
| { |
| cx.type_f32() |
| } |
| ( |
| PowerPC(PowerPCInlineAsmRegClass::vreg | PowerPCInlineAsmRegClass::vsreg), |
| BackendRepr::Scalar(s), |
| ) if s.primitive() == Primitive::Float(Float::F32) => cx.type_vector(cx.type_f32(), 4), |
| ( |
| PowerPC(PowerPCInlineAsmRegClass::vreg | PowerPCInlineAsmRegClass::vsreg), |
| BackendRepr::Scalar(s), |
| ) if s.primitive() == Primitive::Float(Float::F64) => cx.type_vector(cx.type_f64(), 2), |
| _ => layout.llvm_type(cx), |
| } |
| } |
