Clean up simd_cast translation.
This commit is contained in:
Huon Wilson
parent
502f9acbe9
commit
b067e4464b
2 changed files with 67 additions and 104 deletions
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@ -43,6 +43,8 @@ use syntax::ast;
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use syntax::ptr::P;
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use syntax::ptr::P;
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use syntax::parse::token;
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use syntax::parse::token;
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use std::cmp::Ordering;
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pub fn get_simple_intrinsic(ccx: &CrateContext, item: &ast::ForeignItem) -> Option<ValueRef> {
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pub fn get_simple_intrinsic(ccx: &CrateContext, item: &ast::ForeignItem) -> Option<ValueRef> {
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let name = match &*item.ident.name.as_str() {
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let name = match &*item.ident.name.as_str() {
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"sqrtf32" => "llvm.sqrt.f32",
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"sqrtf32" => "llvm.sqrt.f32",
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@ -1485,120 +1487,57 @@ fn generic_simd_intrinsic<'blk, 'tcx, 'a>
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if in_elem == out_elem { return llargs[0]; }
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if in_elem == out_elem { return llargs[0]; }
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match (&in_elem.sty, &out_elem.sty) {
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enum Style { Float, Int(/* is signed? */ bool), Unsupported }
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(&ty::TyInt(lhs), &ty::TyInt(rhs)) => {
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match (lhs, rhs) {
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(ast::TyI8, ast::TyI8) |
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(ast::TyI16, ast::TyI16) |
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(ast::TyI32, ast::TyI32) |
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(ast::TyI64, ast::TyI64) => return llargs[0],
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(ast::TyI8, ast::TyI16) |
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let (in_style, in_width) = match in_elem.sty {
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(ast::TyI8, ast::TyI32) |
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// vectors of pointer-sized integers should've been
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(ast::TyI8, ast::TyI64) |
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// disallowed before here, so this unwrap is safe.
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(ast::TyI16, ast::TyI32) |
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ty::TyInt(i) => (Style::Int(true), i.bit_width().unwrap()),
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(ast::TyI16, ast::TyI64) |
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ty::TyUint(u) => (Style::Int(false), u.bit_width().unwrap()),
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(ast::TyI32, ast::TyI64) => return SExt(bcx, llargs[0], llret_ty),
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ty::TyFloat(f) => (Style::Float, f.bit_width()),
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_ => (Style::Unsupported, 0)
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};
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let (out_style, out_width) = match out_elem.sty {
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ty::TyInt(i) => (Style::Int(true), i.bit_width().unwrap()),
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ty::TyUint(u) => (Style::Int(false), u.bit_width().unwrap()),
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ty::TyFloat(f) => (Style::Float, f.bit_width()),
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_ => (Style::Unsupported, 0)
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};
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(ast::TyI16, ast::TyI8) |
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match (in_style, out_style) {
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(ast::TyI32, ast::TyI8) |
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(Style::Int(in_is_signed), Style::Int(_)) => {
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(ast::TyI32, ast::TyI16) |
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return match in_width.cmp(&out_width) {
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(ast::TyI64, ast::TyI8) |
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Ordering::Greater => Trunc(bcx, llargs[0], llret_ty),
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(ast::TyI64, ast::TyI16) |
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Ordering::Equal => llargs[0],
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(ast::TyI64, ast::TyI32) => return Trunc(bcx, llargs[0], llret_ty),
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Ordering::Less => if in_is_signed {
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_ => {}
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SExt(bcx, llargs[0], llret_ty)
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} else {
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ZExt(bcx, llargs[0], llret_ty)
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}
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}
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}
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}
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}
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(&ty::TyUint(lhs), &ty::TyUint(rhs)) => {
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(Style::Int(in_is_signed), Style::Float) => {
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match (lhs, rhs) {
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return if in_is_signed {
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(ast::TyU8, ast::TyU8) |
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SIToFP(bcx, llargs[0], llret_ty)
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(ast::TyU16, ast::TyU16) |
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} else {
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(ast::TyU32, ast::TyU32) |
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UIToFP(bcx, llargs[0], llret_ty)
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(ast::TyU64, ast::TyU64) => return llargs[0],
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(ast::TyU8, ast::TyU16) |
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(ast::TyU8, ast::TyU32) |
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(ast::TyU8, ast::TyU64) |
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(ast::TyU16, ast::TyU32) |
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(ast::TyU16, ast::TyU64) |
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(ast::TyU32, ast::TyU64) => return ZExt(bcx, llargs[0], llret_ty),
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(ast::TyU16, ast::TyU8) |
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(ast::TyU32, ast::TyU8) |
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(ast::TyU32, ast::TyU16) |
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(ast::TyU64, ast::TyU8) |
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(ast::TyU64, ast::TyU16) |
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(ast::TyU64, ast::TyU32) => return Trunc(bcx, llargs[0], llret_ty),
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_ => {}
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}
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}
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}
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}
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(&ty::TyInt(lhs), &ty::TyUint(rhs)) => {
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(Style::Float, Style::Int(out_is_signed)) => {
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match (lhs, rhs) {
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return if out_is_signed {
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(ast::TyI8, ast::TyU8) |
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FPToSI(bcx, llargs[0], llret_ty)
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(ast::TyI16, ast::TyU16) |
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} else {
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(ast::TyI32, ast::TyU32) |
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FPToUI(bcx, llargs[0], llret_ty)
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(ast::TyI64, ast::TyU64) => return llargs[0],
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(ast::TyI8, ast::TyU16) |
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(ast::TyI8, ast::TyU32) |
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(ast::TyI8, ast::TyU64) |
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(ast::TyI16, ast::TyU32) |
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(ast::TyI16, ast::TyU64) |
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(ast::TyI32, ast::TyU64) => return SExt(bcx, llargs[0], llret_ty),
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(ast::TyI16, ast::TyU8) |
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(ast::TyI32, ast::TyU8) |
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(ast::TyI32, ast::TyU16) |
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(ast::TyI64, ast::TyU8) |
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(ast::TyI64, ast::TyU16) |
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(ast::TyI64, ast::TyU32) => return Trunc(bcx, llargs[0], llret_ty),
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_ => {}
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}
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}
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}
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}
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(&ty::TyUint(lhs), &ty::TyInt(rhs)) => {
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(Style::Float, Style::Float) => {
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match (lhs, rhs) {
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return match in_width.cmp(&out_width) {
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(ast::TyU8, ast::TyI8) |
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Ordering::Greater => FPTrunc(bcx, llargs[0], llret_ty),
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(ast::TyU16, ast::TyI16) |
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Ordering::Equal => llargs[0],
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(ast::TyU32, ast::TyI32) |
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Ordering::Less => FPExt(bcx, llargs[0], llret_ty)
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(ast::TyU64, ast::TyI64) => return llargs[0],
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(ast::TyU8, ast::TyI16) |
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(ast::TyU8, ast::TyI32) |
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(ast::TyU8, ast::TyI64) |
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(ast::TyU16, ast::TyI32) |
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(ast::TyU16, ast::TyI64) |
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(ast::TyU32, ast::TyI64) => return ZExt(bcx, llargs[0], llret_ty),
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(ast::TyU16, ast::TyI8) |
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(ast::TyU32, ast::TyI8) |
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(ast::TyU32, ast::TyI16) |
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(ast::TyU64, ast::TyI8) |
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(ast::TyU64, ast::TyI16) |
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(ast::TyU64, ast::TyI32) => return Trunc(bcx, llargs[0], llret_ty),
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_ => {}
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}
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}
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}
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}
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_ => {/* Unsupported. Fallthrough. */}
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(&ty::TyInt(_), &ty::TyFloat(_)) => {
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return SIToFP(bcx, llargs[0], llret_ty)
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}
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(&ty::TyUint(_), &ty::TyFloat(_)) => {
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return UIToFP(bcx, llargs[0], llret_ty)
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}
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(&ty::TyFloat(_), &ty::TyInt(_)) => {
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return FPToSI(bcx, llargs[0], llret_ty)
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}
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(&ty::TyFloat(_), &ty::TyUint(_)) => {
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return FPToUI(bcx, llargs[0], llret_ty)
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}
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(&ty::TyFloat(ast::TyF32), &ty::TyFloat(ast::TyF64)) => {
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return FPExt(bcx, llargs[0], llret_ty)
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}
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(&ty::TyFloat(ast::TyF64), &ty::TyFloat(ast::TyF32)) => {
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return FPTrunc(bcx, llargs[0], llret_ty)
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}
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_ => {}
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}
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}
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require!(false,
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require!(false,
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"unsupported cast from `{}` with element `{}` to `{}` with element `{}`",
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"unsupported cast from `{}` with element `{}` to `{}` with element `{}`",
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@ -1339,6 +1339,15 @@ impl IntTy {
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TyI16 | TyI32 | TyI64 => 3,
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TyI16 | TyI32 | TyI64 => 3,
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}
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}
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}
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}
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pub fn bit_width(&self) -> Option<usize> {
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Some(match *self {
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TyIs => return None,
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TyI8 => 8,
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TyI16 => 16,
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TyI32 => 32,
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TyI64 => 64,
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})
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}
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}
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}
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#[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Copy)]
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#[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Copy)]
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@ -1357,6 +1366,15 @@ impl UintTy {
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TyU16 | TyU32 | TyU64 => 3,
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TyU16 | TyU32 | TyU64 => 3,
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}
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}
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}
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}
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pub fn bit_width(&self) -> Option<usize> {
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Some(match *self {
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TyUs => return None,
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TyU8 => 8,
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TyU16 => 16,
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TyU32 => 32,
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TyU64 => 64,
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})
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}
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}
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}
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impl fmt::Debug for UintTy {
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impl fmt::Debug for UintTy {
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@ -1395,6 +1413,12 @@ impl FloatTy {
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TyF32 | TyF64 => 3, // add F128 handling here
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TyF32 | TyF64 => 3, // add F128 handling here
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}
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}
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}
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}
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pub fn bit_width(&self) -> usize {
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match *self {
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TyF32 => 32,
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TyF64 => 64,
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}
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}
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}
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}
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// Bind a type to an associated type: `A=Foo`.
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// Bind a type to an associated type: `A=Foo`.
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