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apints on big-endian machines if the bitwidth is not a multiple of 8. Introduce a new helper, MVT::getStoreSizeInBits, and use it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43934 91177308-0d34-0410-b5e6-96231b3b80d8
380 lines
13 KiB
C++
380 lines
13 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 was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source 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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/// MVT namespace - This namespace defines the SimpleValueType enum, which
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/// contains the various low-level value types, and the ValueType typedef.
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///
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namespace MVT { // MVT = Machine Value Types
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enum SimpleValueType {
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// If you change this numbering, you must change the values in ValueTypes.td
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// 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::ValueType - This type holds low-level value types. Valid values
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/// include any of the values in the SimpleValueType enum, or any value
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/// returned from a function in the MVT namespace that has a ValueType
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/// return type. Any value type equal to one of the SimpleValueType enum
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/// values is a "simple" value type. All other value types 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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/// 31--------------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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/// Note that the verifier currently requires the top bit to be zero.
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typedef uint32_t ValueType;
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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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/// MVT::isExtendedVT - Test if the given ValueType is extended
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/// (as opposed to being simple).
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static inline bool isExtendedVT(ValueType VT) {
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return VT > SimpleTypeMask;
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}
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/// MVT::isInteger - Return true if this is an integer, or a vector integer
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/// type.
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static inline bool isInteger(ValueType VT) {
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ValueType SVT = VT & SimpleTypeMask;
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return (SVT >= FIRST_INTEGER_VALUETYPE && SVT <= LAST_INTEGER_VALUETYPE) ||
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(SVT >= v8i8 && SVT <= v2i64) || (SVT == iAny && (VT & PrecisionMask));
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}
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/// MVT::isFloatingPoint - Return true if this is an FP, or a vector FP type.
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static inline bool isFloatingPoint(ValueType VT) {
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ValueType SVT = VT & SimpleTypeMask;
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return (SVT >= f32 && SVT <= ppcf128) || (SVT >= v2f32 && SVT <= v2f64);
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}
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/// MVT::isVector - Return true if this is a vector value type.
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static inline bool isVector(ValueType VT) {
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return (VT >= FIRST_VECTOR_VALUETYPE && VT <= LAST_VECTOR_VALUETYPE) ||
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(VT & VectorMask);
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}
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/// MVT::getVectorElementType - Given a vector type, return the type of
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/// each element.
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static inline ValueType getVectorElementType(ValueType VT) {
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assert(isVector(VT) && "Invalid vector type!");
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switch (VT) {
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default:
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assert(isExtendedVT(VT) && "Unknown simple vector type!");
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return VT & ElementMask;
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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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/// MVT::getVectorNumElements - Given a vector type, return the
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/// number of elements it contains.
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static inline unsigned getVectorNumElements(ValueType VT) {
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assert(isVector(VT) && "Invalid vector type!");
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switch (VT) {
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default:
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assert(isExtendedVT(VT) && "Unknown simple vector type!");
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return ((VT & 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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/// MVT::getSizeInBits - Return the size of the specified value type
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/// in bits.
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///
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static inline unsigned getSizeInBits(ValueType VT) {
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switch (VT) {
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default:
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assert(isExtendedVT(VT) && "ValueType has no known size!");
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if (isVector(VT))
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return getSizeInBits(getVectorElementType(VT)) *
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getVectorNumElements(VT);
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if (isInteger(VT))
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return ((VT & PrecisionMask) >> SimpleTypeBits) + 1;
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assert(0 && "Unknown value type!");
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case MVT::i1 : return 1;
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case MVT::i8 : return 8;
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case MVT::i16 : return 16;
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case MVT::f32 :
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case MVT::i32 : return 32;
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case MVT::f64 :
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case MVT::i64 :
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case MVT::v8i8:
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case MVT::v4i16:
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case MVT::v2i32:
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case MVT::v1i64:
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case MVT::v2f32: return 64;
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case MVT::f80 : return 80;
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case MVT::v3i32:
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case MVT::v3f32: return 96;
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case MVT::f128:
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case MVT::ppcf128:
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case MVT::i128:
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case MVT::v16i8:
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case MVT::v8i16:
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case MVT::v4i32:
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case MVT::v2i64:
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case MVT::v4f32:
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case MVT::v2f64: return 128;
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}
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}
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/// MVT::getStoreSizeInBits - Return the number of bits overwritten by a
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/// store of the specified value type.
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///
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static inline unsigned getStoreSizeInBits(ValueType VT) {
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return (getSizeInBits(VT) + 7)/8*8;
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}
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/// MVT::getIntegerType - Returns the ValueType that represents an integer
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/// with the given number of bits.
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///
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static inline ValueType getIntegerType(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 MVT::i1;
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case 8:
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return MVT::i8;
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case 16:
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return MVT::i16;
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case 32:
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return MVT::i32;
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case 64:
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return MVT::i64;
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case 128:
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return MVT::i128;
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}
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ValueType Result = iAny |
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(((BitWidth - 1) << SimpleTypeBits) & PrecisionMask);
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assert(getSizeInBits(Result) == BitWidth && "Bad bit width!");
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return Result;
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}
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/// MVT::RoundIntegerType - Rounds the bit-width of the given integer
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/// ValueType up to the nearest power of two (and at least to eight),
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/// and returns the integer ValueType with that number of bits.
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///
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static inline ValueType RoundIntegerType(ValueType VT) {
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assert(isInteger(VT) && !isVector(VT) && "Invalid integer type!");
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unsigned BitWidth = getSizeInBits(VT);
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if (BitWidth <= 8)
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return MVT::i8;
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else
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return getIntegerType(1 << Log2_32_Ceil(BitWidth));
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}
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/// MVT::getVectorType - Returns the ValueType that represents a vector
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/// NumElements in length, where each element is of type VT.
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///
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static inline ValueType getVectorType(ValueType VT, unsigned NumElements) {
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switch (VT) {
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default:
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break;
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case MVT::i8:
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if (NumElements == 8) return MVT::v8i8;
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if (NumElements == 16) return MVT::v16i8;
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break;
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case MVT::i16:
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if (NumElements == 4) return MVT::v4i16;
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if (NumElements == 8) return MVT::v8i16;
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break;
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case MVT::i32:
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if (NumElements == 2) return MVT::v2i32;
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if (NumElements == 3) return MVT::v3i32;
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if (NumElements == 4) return MVT::v4i32;
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break;
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case MVT::i64:
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if (NumElements == 1) return MVT::v1i64;
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if (NumElements == 2) return MVT::v2i64;
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break;
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case MVT::f32:
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if (NumElements == 2) return MVT::v2f32;
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if (NumElements == 3) return MVT::v3f32;
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if (NumElements == 4) return MVT::v4f32;
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break;
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case MVT::f64:
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if (NumElements == 2) return MVT::v2f64;
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break;
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}
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// Set the length with the top bit forced to zero (needed by the verifier).
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ValueType Result = VT | (((NumElements + 1) << (33 - VectorBits)) >> 1);
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assert(getVectorElementType(Result) == VT &&
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"Bad vector element type!");
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assert(getVectorNumElements(Result) == NumElements &&
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"Bad vector length!");
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return Result;
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}
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/// MVT::getIntVectorWithNumElements - Return any integer vector type that has
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/// the specified number of elements.
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static inline ValueType getIntVectorWithNumElements(unsigned NumElts) {
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switch (NumElts) {
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default: return getVectorType(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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/// MVT::getIntVTBitMask - Return an integer with 1's every place there are
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/// bits in the specified integer value type.
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static inline uint64_t getIntVTBitMask(ValueType VT) {
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assert(isInteger(VT) && !isVector(VT) && "Only applies to int scalars!");
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return ~uint64_t(0UL) >> (64-getSizeInBits(VT));
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}
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/// MVT::getIntVTSignBit - Return an integer with a 1 in the position of the
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/// sign bit for the specified integer value type.
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static inline uint64_t getIntVTSignBit(ValueType VT) {
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assert(isInteger(VT) && !isVector(VT) && "Only applies to int scalars!");
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return uint64_t(1UL) << (getSizeInBits(VT)-1);
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}
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/// MVT::getValueTypeString - This function returns value type as a string,
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/// e.g. "i32".
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std::string getValueTypeString(ValueType VT);
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/// MVT::getTypeForValueType - This method returns an LLVM type corresponding
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/// to the specified ValueType. For integer types, this returns an unsigned
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/// type. Note that this will abort for types that cannot be represented.
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const Type *getTypeForValueType(ValueType VT);
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/// MVT::getValueType - Return the value type corresponding to the specified
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/// type. This returns all pointers as MVT::iPTR. If HandleUnknown is true,
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/// unknown types are returned as Other, otherwise they are invalid.
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ValueType getValueType(const Type *Ty, bool HandleUnknown = false);
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}
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} // End llvm namespace
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#endif
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