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add the popcount instruction and support this in the isel

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the primary user of this will probably end up being find-first-set-bit/find-
last-set-bit, which i'll get around to...


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21860 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duraid Madina 2005-05-11 05:16:09 +00:00
parent 9b583b4910
commit 63bbed536c
2 changed files with 8 additions and 1 deletions
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7
lib/Target/IA64/IA64ISelPattern.cpp
View File

@ -90,7 +90,6 @@ namespace {
setOperationAction(ISD::FSQRT, MVT::f32, Expand);
//IA64 has these, but they are not implemented
setOperationAction(ISD::CTPOP, MVT::i64 , Expand);
setOperationAction(ISD::CTTZ , MVT::i64 , Expand);
setOperationAction(ISD::CTLZ , MVT::i64 , Expand);
@ -1600,6 +1599,12 @@ pC = pA OR pB
return Result;
}
case ISD::CTPOP: {
Tmp1 = SelectExpr(N.getOperand(0));
BuildMI(BB, IA64::POPCNT, 1, Result).addReg(Tmp1);
return Result;
}
case ISD::SHL: {
Tmp1 = SelectExpr(N.getOperand(0));
if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(N.getOperand(1))) {

2
lib/Target/IA64/IA64InstrInfo.td
View File

@ -227,6 +227,8 @@ def LD4 : AForm<0x03, 0x0b, (ops GR:$dst, GR:$srcPtr),
def LD8 : AForm<0x03, 0x0b, (ops GR:$dst, GR:$srcPtr),
"ld8 $dst = [$srcPtr];;">;
def POPCNT : AForm<0x03, 0x0b, (ops GR:$dst, GR:$src), "popcnt $dst = $src;;">;
// some FP stuff:
def FADD : AForm<0x03, 0x0b, (ops FP:$dst, FP:$src1, FP:$src2),
"fadd $dst = $src1, $src2;;">;