mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-09-06 09:54:49 +00:00
still excluding types like i1 (not byte sized) and i120 (loading an i120 requires loading an i64, an i32, an i16 and an i8, which is expensive). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52310 91177308-0d34-0410-b5e6-96231b3b80d8
454 lines
15 KiB
C++
454 lines
15 KiB
C++
//===- CodeGen/ValueTypes.h - Low-Level Target independ. types --*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the set of low-level target independent types which various
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// values in the code generator are. This allows the target specific behavior
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// of instructions to be described to target independent passes.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_VALUETYPES_H
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#define LLVM_CODEGEN_VALUETYPES_H
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#include <cassert>
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#include <string>
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#include "llvm/Support/DataTypes.h"
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#include "llvm/Support/MathExtras.h"
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namespace llvm {
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class Type;
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struct MVT { // MVT = Machine Value Type
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public:
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enum SimpleValueType {
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// If you change this numbering, you must change the values in
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// ValueTypes.td well!
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Other = 0, // This is a non-standard value
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i1 = 1, // This is a 1 bit integer value
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i8 = 2, // This is an 8 bit integer value
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i16 = 3, // This is a 16 bit integer value
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i32 = 4, // This is a 32 bit integer value
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i64 = 5, // This is a 64 bit integer value
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i128 = 6, // This is a 128 bit integer value
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FIRST_INTEGER_VALUETYPE = i1,
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LAST_INTEGER_VALUETYPE = i128,
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f32 = 7, // This is a 32 bit floating point value
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f64 = 8, // This is a 64 bit floating point value
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f80 = 9, // This is a 80 bit floating point value
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f128 = 10, // This is a 128 bit floating point value
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ppcf128 = 11, // This is a PPC 128-bit floating point value
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Flag = 12, // This is a condition code or machine flag.
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isVoid = 13, // This has no value
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v8i8 = 14, // 8 x i8
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v4i16 = 15, // 4 x i16
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v2i32 = 16, // 2 x i32
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v1i64 = 17, // 1 x i64
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v16i8 = 18, // 16 x i8
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v8i16 = 19, // 8 x i16
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v3i32 = 20, // 3 x i32
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v4i32 = 21, // 4 x i32
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v2i64 = 22, // 2 x i64
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v2f32 = 23, // 2 x f32
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v3f32 = 24, // 3 x f32
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v4f32 = 25, // 4 x f32
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v2f64 = 26, // 2 x f64
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FIRST_VECTOR_VALUETYPE = v8i8,
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LAST_VECTOR_VALUETYPE = v2f64,
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LAST_VALUETYPE = 27, // This always remains at the end of the list.
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// fAny - Any floating-point or vector floating-point value. This is used
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// for intrinsics that have overloadings based on floating-point types.
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// This is only for tblgen's consumption!
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fAny = 253,
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// iAny - An integer or vector integer value of any bit width. This is
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// used for intrinsics that have overloadings based on integer bit widths.
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// This is only for tblgen's consumption!
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iAny = 254,
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// iPTR - An int value the size of the pointer of the current
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// target. This should only be used internal to tblgen!
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iPTR = 255
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};
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/// MVT - This type holds low-level value types. Valid values include any of
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/// the values in the SimpleValueType enum, or any value returned from one
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/// of the MVT methods. Any value type equal to one of the SimpleValueType
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/// enum values is a "simple" value type. All others are "extended".
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///
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/// Note that simple doesn't necessary mean legal for the target machine.
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/// All legal value types must be simple, but often there are some simple
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/// value types that are not legal.
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///
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/// @internal
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/// Extended types are either vector types or arbitrary precision integers.
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/// Arbitrary precision integers have iAny in the first SimpleTypeBits bits,
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/// and the bit-width in the next PrecisionBits bits, offset by minus one.
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/// Vector types are encoded by having the first SimpleTypeBits+PrecisionBits
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/// bits encode the vector element type (which must be a scalar type, possibly
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/// an arbitrary precision integer) and the remaining VectorBits upper bits
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/// encode the vector length, offset by one.
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///
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/// 32--------------16-----------8-------------0
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/// | Vector length | Precision | Simple type |
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/// | | Vector element |
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///
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private:
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static const int SimpleTypeBits = 8;
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static const int PrecisionBits = 8;
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static const int VectorBits = 32 - SimpleTypeBits - PrecisionBits;
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static const uint32_t SimpleTypeMask =
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(~uint32_t(0) << (32 - SimpleTypeBits)) >> (32 - SimpleTypeBits);
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static const uint32_t PrecisionMask =
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((~uint32_t(0) << VectorBits) >> (32 - PrecisionBits)) << SimpleTypeBits;
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static const uint32_t VectorMask =
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(~uint32_t(0) >> (32 - VectorBits)) << (32 - VectorBits);
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static const uint32_t ElementMask =
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(~uint32_t(0) << VectorBits) >> VectorBits;
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uint32_t V;
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public:
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MVT() {}
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MVT(SimpleValueType S) { V = S; }
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inline bool operator== (const MVT VT) const { return V == VT.V; }
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inline bool operator!= (const MVT VT) const { return V != VT.V; }
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/// getIntegerVT - Returns the MVT that represents an integer with the given
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/// number of bits.
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static inline MVT getIntegerVT(unsigned BitWidth) {
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switch (BitWidth) {
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default:
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break;
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case 1:
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return i1;
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case 8:
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return i8;
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case 16:
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return i16;
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case 32:
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return i32;
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case 64:
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return i64;
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case 128:
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return i128;
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}
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MVT VT;
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VT.V = iAny | (((BitWidth - 1) << SimpleTypeBits) & PrecisionMask);
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assert(VT.getSizeInBits() == BitWidth && "Bad bit width!");
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return VT;
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}
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/// getVectorVT - Returns the MVT that represents a vector NumElements in
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/// length, where each element is of type VT.
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static inline MVT getVectorVT(MVT VT, unsigned NumElements) {
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switch (VT.V) {
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default:
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break;
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case i8:
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if (NumElements == 8) return v8i8;
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if (NumElements == 16) return v16i8;
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break;
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case i16:
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if (NumElements == 4) return v4i16;
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if (NumElements == 8) return v8i16;
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break;
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case i32:
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if (NumElements == 2) return v2i32;
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if (NumElements == 3) return v3i32;
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if (NumElements == 4) return v4i32;
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break;
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case i64:
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if (NumElements == 1) return v1i64;
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if (NumElements == 2) return v2i64;
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break;
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case f32:
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if (NumElements == 2) return v2f32;
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if (NumElements == 3) return v3f32;
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if (NumElements == 4) return v4f32;
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break;
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case f64:
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if (NumElements == 2) return v2f64;
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break;
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}
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MVT Result;
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Result.V = VT.V | ((NumElements + 1) << (32 - VectorBits));
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assert(Result.getVectorElementType() == VT &&
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"Bad vector element type!");
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assert(Result.getVectorNumElements() == NumElements &&
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"Bad vector length!");
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return Result;
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}
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/// getIntVectorWithNumElements - Return any integer vector type that has
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/// the specified number of elements.
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static inline MVT getIntVectorWithNumElements(unsigned NumElts) {
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switch (NumElts) {
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default: return getVectorVT(i8, NumElts);
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case 1: return v1i64;
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case 2: return v2i32;
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case 3: return v3i32;
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case 4: return v4i16;
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case 8: return v8i8;
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case 16: return v16i8;
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}
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}
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/// isSimple - Test if the given MVT is simple (as opposed to being
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/// extended).
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inline bool isSimple() const {
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return V <= SimpleTypeMask;
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}
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/// isExtended - Test if the given MVT is extended (as opposed to
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/// being simple).
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inline bool isExtended() const {
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return !isSimple();
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}
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/// isFloatingPoint - Return true if this is a FP, or a vector FP type.
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inline bool isFloatingPoint() const {
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uint32_t SVT = V & SimpleTypeMask;
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return (SVT >= f32 && SVT <= ppcf128) || (SVT >= v2f32 && SVT <= v2f64);
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}
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/// isInteger - Return true if this is an integer, or a vector integer type.
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inline bool isInteger() const {
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uint32_t SVT = V & SimpleTypeMask;
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return (SVT >= FIRST_INTEGER_VALUETYPE && SVT <= LAST_INTEGER_VALUETYPE) ||
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(SVT >= v8i8 && SVT <= v2i64) || (SVT == iAny && (V & PrecisionMask));
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}
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/// isVector - Return true if this is a vector value type.
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inline bool isVector() const {
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return (V >= FIRST_VECTOR_VALUETYPE && V <= LAST_VECTOR_VALUETYPE) ||
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(V & VectorMask);
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}
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/// is64BitVector - Return true if this is a 64-bit vector type.
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inline bool is64BitVector() const {
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return (V==v8i8 || V==v4i16 || V==v2i32 || V==v1i64 || V==v2f32 ||
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(isExtended() && isVector() && getSizeInBits()==64));
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}
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/// is128BitVector - Return true if this is a 128-bit vector type.
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inline bool is128BitVector() const {
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return (V==v16i8 || V==v8i16 || V==v4i32 || V==v2i64 ||
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V==v4f32 || V==v2f64 ||
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(isExtended() && isVector() && getSizeInBits()==128));
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}
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/// isByteSized - Return true if the bit size is a multiple of 8.
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inline bool isByteSized() const {
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return (getSizeInBits() & 7) == 0;
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}
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/// isRound - Return true if the size is a power-of-two number of bytes.
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inline bool isRound() const {
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unsigned BitSize = getSizeInBits();
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return BitSize >= 8 && !(BitSize & (BitSize - 1));
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}
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/// bitsGT - Return true if this has more bits than VT.
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inline bool bitsGT(MVT VT) const {
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return getSizeInBits() > VT.getSizeInBits();
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}
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/// bitsGE - Return true if this has no less bits than VT.
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inline bool bitsGE(MVT VT) const {
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return getSizeInBits() >= VT.getSizeInBits();
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}
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/// bitsLT - Return true if this has less bits than VT.
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inline bool bitsLT(MVT VT) const {
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return getSizeInBits() < VT.getSizeInBits();
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}
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/// bitsLE - Return true if this has no more bits than VT.
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inline bool bitsLE(MVT VT) const {
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return getSizeInBits() <= VT.getSizeInBits();
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}
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/// getSimpleVT - Return the SimpleValueType held in the specified
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/// simple MVT.
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inline SimpleValueType getSimpleVT() const {
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assert(isSimple() && "Expected a SimpleValueType!");
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return (SimpleValueType)V;
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}
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/// getVectorElementType - Given a vector type, return the type of
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/// each element.
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inline MVT getVectorElementType() const {
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assert(isVector() && "Invalid vector type!");
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switch (V) {
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default: {
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assert(isExtended() && "Unknown simple vector type!");
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MVT VT;
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VT.V = V & ElementMask;
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return VT;
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}
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case v8i8 :
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case v16i8: return i8;
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case v4i16:
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case v8i16: return i16;
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case v2i32:
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case v3i32:
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case v4i32: return i32;
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case v1i64:
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case v2i64: return i64;
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case v2f32:
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case v3f32:
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case v4f32: return f32;
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case v2f64: return f64;
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}
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}
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/// getVectorNumElements - Given a vector type, return the number of
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/// elements it contains.
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inline unsigned getVectorNumElements() const {
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assert(isVector() && "Invalid vector type!");
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switch (V) {
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default:
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assert(isExtended() && "Unknown simple vector type!");
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return ((V & VectorMask) >> (32 - VectorBits)) - 1;
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case v16i8: return 16;
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case v8i8 :
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case v8i16: return 8;
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case v4i16:
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case v4i32:
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case v4f32: return 4;
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case v3i32:
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case v3f32: return 3;
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case v2i32:
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case v2i64:
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case v2f32:
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case v2f64: return 2;
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case v1i64: return 1;
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}
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}
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/// getSizeInBits - Return the size of the specified value type in bits.
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inline unsigned getSizeInBits() const {
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switch (V) {
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default:
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assert(isExtended() && "MVT has no known size!");
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if (isVector())
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return getVectorElementType().getSizeInBits()*getVectorNumElements();
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if (isInteger())
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return ((V & PrecisionMask) >> SimpleTypeBits) + 1;
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assert(false && "Unknown value type!");
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return 0;
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case i1 : return 1;
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case i8 : return 8;
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case i16 : return 16;
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case f32 :
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case i32 : return 32;
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case f64 :
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case i64 :
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case v8i8:
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case v4i16:
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case v2i32:
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case v1i64:
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case v2f32: return 64;
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case f80 : return 80;
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case v3i32:
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case v3f32: return 96;
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case f128:
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case ppcf128:
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case i128:
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case v16i8:
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case v8i16:
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case v4i32:
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case v2i64:
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case v4f32:
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case v2f64: return 128;
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}
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}
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/// getStoreSizeInBits - Return the number of bits overwritten by a store
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/// of the specified value type.
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inline unsigned getStoreSizeInBits() const {
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return (getSizeInBits() + 7)/8*8;
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}
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/// getRoundIntegerType - Rounds the bit-width of the given integer MVT up
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/// to the nearest power of two (and at least to eight), and returns the
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/// integer MVT with that number of bits.
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inline MVT getRoundIntegerType() const {
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assert(isInteger() && !isVector() && "Invalid integer type!");
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unsigned BitWidth = getSizeInBits();
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if (BitWidth <= 8)
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return i8;
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else
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return getIntegerVT(1 << Log2_32_Ceil(BitWidth));
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}
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/// getIntegerVTBitMask - Return an integer with 1's every place there are
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/// bits in the specified integer value type. FIXME: Should return an apint.
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inline uint64_t getIntegerVTBitMask() const {
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assert(isInteger() && !isVector() && "Only applies to int scalars!");
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return ~uint64_t(0UL) >> (64-getSizeInBits());
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}
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/// getIntegerVTSignBit - Return an integer with a 1 in the position of the
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/// sign bit for the specified integer value type. FIXME: Should return an
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/// apint.
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inline uint64_t getIntegerVTSignBit() const {
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assert(isInteger() && !isVector() && "Only applies to int scalars!");
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return uint64_t(1UL) << (getSizeInBits()-1);
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}
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/// getMVTString - This function returns value type as a string,
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/// e.g. "i32".
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std::string getMVTString() const;
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/// getTypeForMVT - This method returns an LLVM type corresponding to the
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/// specified MVT. For integer types, this returns an unsigned type. Note
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/// that this will abort for types that cannot be represented.
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const Type *getTypeForMVT() const;
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/// getMVT - Return the value type corresponding to the specified type.
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/// This returns all pointers as iPTR. If HandleUnknown is true, unknown
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/// types are returned as Other, otherwise they are invalid.
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static MVT getMVT(const Type *Ty, bool HandleUnknown = false);
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/// getRawBits - Represent the type as a bunch of bits.
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uint32_t getRawBits() const { return V; }
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/// compareRawBits - A meaningless but well-behaved order, useful for
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/// constructing containers.
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struct compareRawBits {
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bool operator()(MVT L, MVT R) const {
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return L.getRawBits() < R.getRawBits();
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}
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};
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};
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} // End llvm namespace
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#endif
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