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08e682ecf4
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29195 91177308-0d34-0410-b5e6-96231b3b80d8
200 lines
6.9 KiB
C++
200 lines
6.9 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 "llvm/Support/DataTypes.h"
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namespace llvm {
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class Type;
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/// MVT namespace - This namespace defines the ValueType enum, which contains
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/// the various low-level value types.
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///
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namespace MVT { // MVT = Machine Value Types
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enum ValueType {
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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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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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Flag = 11, // This is a condition code or machine flag.
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isVoid = 12, // This has no value
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Vector = 13, // This is an abstract vector type, which will
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// be expanded into a target vector type, or scalars
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// if no matching vector type is available.
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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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v16i8 = 17, // 16 x i8
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v8i16 = 18, // 8 x i16
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v4i32 = 19, // 4 x i32
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v2i64 = 20, // 2 x i64
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v2f32 = 21, // 2 x f32
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v4f32 = 22, // 4 x f32
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v2f64 = 23, // 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 = 24, // This always remains at the end of the list.
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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::isInteger - Return true if this is a simple integer, or a packed
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/// vector integer type.
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static inline bool isInteger(ValueType VT) {
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return (VT >= i1 && VT <= i128) || (VT >= v8i8 && VT <= v2i64);
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}
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/// MVT::isFloatingPoint - Return true if this is a simple FP, or a packed
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/// vector FP type.
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static inline bool isFloatingPoint(ValueType VT) {
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return (VT >= f32 && VT <= f128) || (VT >= v4f32 && VT <= v2f64);
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}
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/// MVT::isVector - Return true if this is a packed vector type (i.e. not
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/// MVT::Vector).
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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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}
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/// MVT::getSizeInBits - Return the size of the specified value type 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: assert(0 && "ValueType has no known size!");
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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::v2f32: return 64;
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case MVT::f80 : return 80;
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case MVT::f128:
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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::getVectorType - Returns the ValueType that represents a vector
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/// NumElements in length, where each element is of type VT. If there is no
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/// ValueType that represents this vector, a ValueType of Other is returned.
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///
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ValueType getVectorType(ValueType VT, unsigned NumElements);
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/// MVT::getVectorBaseType - Given a packed vector type, return the type of
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/// each element.
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static inline ValueType getVectorBaseType(ValueType VT) {
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switch (VT) {
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default: assert(0 && "Invalid vector type!");
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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 v4i32: return i32;
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case v2i64: return i64;
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case v2f32:
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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 packed vector type, return the number
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/// of elements it contains.
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static inline unsigned getVectorNumElements(ValueType VT) {
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switch (VT) {
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default: assert(0 && "Invalid vector type!");
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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 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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}
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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: assert(0 && "Invalid vector type!");
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case 2: return v2i32;
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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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const char *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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}
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} // End llvm namespace
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#endif
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