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Javed Absar
683224ecbd
This patch cleans up and fixes issues in the M-Class system register handling: 1. It defines the system registers and the encoding (SYSm values) in one place: a new ARMSystemRegister.td using SearchableTable, thereby removing the hand-coded values which existed in multiple places. 2. Some system registers e.g. BASEPRI_MAX_NS which do not exist were being allowed! Ref: ARMv6/7/8M architecture reference manual. Reviewed by: @t.p.northover, @olist01, @john.brawn Differential Revision: https://reviews.llvm.org/D35209 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@308456 91177308-0d34-0410-b5e6-96231b3b80d8
45 lines
1.4 KiB
C++
45 lines
1.4 KiB
C++
//===-- ARMBaseInfo.cpp - ARM Base encoding information------------===//
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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 provides basic encoding and assembly information for ARM.
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//
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//===----------------------------------------------------------------------===//
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#include "ARMBaseInfo.h"
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/Support/Regex.h"
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using namespace llvm;
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namespace llvm {
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namespace ARMSysReg {
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// lookup system register using 12-bit SYSm value.
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// Note: the search is uniqued using M1 mask
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const MClassSysReg *lookupMClassSysRegBy12bitSYSmValue(unsigned SYSm) {
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return lookupMClassSysRegByM1Encoding12(SYSm);
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}
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// returns APSR with _<bits> qualifier.
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// Note: ARMv7-M deprecates using MSR APSR without a _<bits> qualifier
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const MClassSysReg *lookupMClassSysRegAPSRNonDeprecated(unsigned SYSm) {
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return lookupMClassSysRegByM2M3Encoding8((1<<9)|(SYSm & 0xFF));
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}
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// lookup system registers using 8-bit SYSm value
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const MClassSysReg *lookupMClassSysRegBy8bitSYSmValue(unsigned SYSm) {
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return ARMSysReg::lookupMClassSysRegByM2M3Encoding8((1<<8)|(SYSm & 0xFF));
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}
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#define GET_MCLASSSYSREG_IMPL
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#include "ARMGenSystemRegister.inc"
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}
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}
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