RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2025-01-26 14:16:12 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

[X86] Teach the assembler to support %db8-%db15 as aliases for %dr8-%dr15.

Browse Source 
llvm-svn: 319612
This commit is contained in:
Craig Topper 2017-12-02 08:27:46 +00:00
parent 8d65510314
commit 7135686104
2 changed files with 28 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
lib/Target/X86/AsmParser/X86AsmParser.cpp
View File

@ -1098,19 +1098,31 @@ bool X86AsmParser::ParseRegister(unsigned &RegNo,
EndLoc = Parser.getTok().getEndLoc();
// If this is "db[0-7]", match it as an alias
// for dr[0-7].
if (RegNo == 0 && Tok.getString().size() == 3 &&
Tok.getString().startswith("db")) {
switch (Tok.getString()[2]) {
case '0': RegNo = X86::DR0; break;
case '1': RegNo = X86::DR1; break;
case '2': RegNo = X86::DR2; break;
case '3': RegNo = X86::DR3; break;
case '4': RegNo = X86::DR4; break;
case '5': RegNo = X86::DR5; break;
case '6': RegNo = X86::DR6; break;
case '7': RegNo = X86::DR7; break;
// If this is "db[0-15]", match it as an alias
// for dr[0-15].
if (RegNo == 0 && Tok.getString().startswith("db")) {
if (Tok.getString().size() == 3) {
switch (Tok.getString()[2]) {
case '0': RegNo = X86::DR0; break;
case '1': RegNo = X86::DR1; break;
case '2': RegNo = X86::DR2; break;
case '3': RegNo = X86::DR3; break;
case '4': RegNo = X86::DR4; break;
case '5': RegNo = X86::DR5; break;
case '6': RegNo = X86::DR6; break;
case '7': RegNo = X86::DR7; break;
case '8': RegNo = X86::DR8; break;
case '9': RegNo = X86::DR9; break;
}
} else if (Tok.getString().size() == 4 && Tok.getString()[2] == '1') {
switch (Tok.getString()[3]) {
case '0': RegNo = X86::DR10; break;
case '1': RegNo = X86::DR11; break;
case '2': RegNo = X86::DR12; break;
case '3': RegNo = X86::DR13; break;
case '4': RegNo = X86::DR14; break;
case '5': RegNo = X86::DR15; break;
}
}
if (RegNo != 0) {

3
test/MC/X86/x86-64.s
View File

@ -455,6 +455,9 @@ mov %rdx, %cr15
mov %rdx, %dr15
// CHECK: movq %rdx, %dr15
// CHECK: encoding: [0x44,0x0f,0x23,0xfa]
mov %rdx, %db15
// CHECK: movq %rdx, %db15
// CHECK: encoding: [0x44,0x0f,0x23,0xfa]
// rdar://8456371 - Handle commutable instructions written backward.
// CHECK: faddp %st(1)