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ARM IAS: support .short and .hword

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This adds support for the .short and its alias .hword for adding literal values
into the object file.  This is similar to the .word directive, however, rather
than inserting a value of 4 bytes, adds a 2-byte value.

llvm-svn: 201968
This commit is contained in:
Saleem Abdulrasool 2014-02-23 06:22:09 +00:00
parent b31e03007a
commit 3897651250
3 changed files with 35 additions and 11 deletions
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14
llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
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@ -199,7 +199,7 @@ class ARMAsmParser : public MCTargetAsmParser {
bool parsePrefix(ARMMCExpr::VariantKind &RefKind);
bool parseMemRegOffsetShift(ARM_AM::ShiftOpc &ShiftType,
unsigned &ShiftAmount);
bool parseDirectiveWord(unsigned Size, SMLoc L);
bool parseLiteralValues(unsigned Size, SMLoc L);
bool parseDirectiveThumb(SMLoc L);
bool parseDirectiveARM(SMLoc L);
bool parseDirectiveThumbFunc(SMLoc L);
@ -7959,7 +7959,9 @@ MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
StringRef IDVal = DirectiveID.getIdentifier();
if (IDVal == ".word")
return parseDirectiveWord(4, DirectiveID.getLoc());
return parseLiteralValues(4, DirectiveID.getLoc());
else if (IDVal == ".short" || IDVal == ".hword")
return parseLiteralValues(2, DirectiveID.getLoc());
else if (IDVal == ".thumb")
return parseDirectiveThumb(DirectiveID.getLoc());
else if (IDVal == ".arm")
@ -8023,9 +8025,11 @@ bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
return true;
}
/// parseDirectiveWord
/// ::= .word [ expression (, expression)* ]
bool ARMAsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
/// parseLiteralValues
/// ::= .hword expression [, expression]*
/// ::= .short expression [, expression]*
/// ::= .word expression [, expression]*
bool ARMAsmParser::parseLiteralValues(unsigned Size, SMLoc L) {
if (getLexer().isNot(AsmToken::EndOfStatement)) {
for (;;) {
const MCExpr *Value;

6
llvm/test/MC/ARM/arm_word_directive.s
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@ -1,6 +0,0 @@
@ RUN: llvm-mc -mcpu=cortex-a8 -triple arm-unknown-unknown %s | FileCheck %s
@ CHECK: TEST0:
@ CHECK: .long 3
TEST0:
.word 3

26
llvm/test/MC/ARM/directive-literals.s Normal file
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@ -0,0 +1,26 @@
@ RUN: llvm-mc -triple arm %s | FileCheck %s
.data
short:
.short 0
.short 0xdefe
@ CHECK-LABEL: short
@ CHECK-NEXT: .short 0
@ CHECK-NEXT: .short 57086
hword:
.hword 0
.hword 0xdefe
@ CHECK-LABEL: hword
@ CHECK-NEXT: .short 0
@ CHECK-NEXT: .short 57086
word:
.word 3
@ CHECK-LABEL: word
@ CHECK-NEXT: .long 3