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Fix instruction encoding for "bd(n)z" on PowerPC, 

by using a new instruction format BForm_1.

llvm-svn: 167861
This commit is contained in:
Ulrich Weigand 2012-11-13 19:15:52 +00:00
parent 84ee76acfe
commit 0117718580
3 changed files with 15 additions and 14 deletions
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8
llvm/lib/Target/PowerPC/PPCInstr64Bit.td
View File

@ -234,10 +234,10 @@ def : Pat<(PPCtc_return CTRRC8:$dst, imm:$imm),
let isBranch = 1, isTerminator = 1, hasCtrlDep = 1, PPC970_Unit = 7 in {
let Defs = [CTR8], Uses = [CTR8] in {
def BDZ8 : IForm_ext<16, 18, 0, 0, (outs), (ins condbrtarget:$dst),
"bdz $dst", BrB, []>;
def BDNZ8 : IForm_ext<16, 16, 0, 0, (outs), (ins condbrtarget:$dst),
"bdnz $dst", BrB, []>;
def BDZ8 : BForm_1<16, 18, 0, 0, (outs), (ins condbrtarget:$dst),
"bdz $dst">;
def BDNZ8 : BForm_1<16, 16, 0, 0, (outs), (ins condbrtarget:$dst),
"bdnz $dst">;
}
}

13
llvm/lib/Target/PowerPC/PPCInstrFormats.td
View File

@ -94,12 +94,6 @@ class IForm<bits<6> opcode, bit aa, bit lk, dag OOL, dag IOL, string asmstr,
let Inst{31} = lk;
}
class IForm_ext<bits<6> opcode, bits<5> bo, bit aa, bit lk, dag OOL, dag IOL,
string asmstr, InstrItinClass itin, list<dag> pattern>
: IForm<opcode, aa, lk, OOL, IOL, asmstr, itin, pattern> {
let LI{0-4} = bo;
}
// 1.7.2 B-Form
class BForm<bits<6> opcode, bit aa, bit lk, dag OOL, dag IOL, string asmstr>
: I<opcode, OOL, IOL, asmstr, BrB> {
@ -118,6 +112,13 @@ class BForm<bits<6> opcode, bit aa, bit lk, dag OOL, dag IOL, string asmstr>
let Inst{31} = lk;
}
class BForm_1<bits<6> opcode, bits<5> bo, bit aa, bit lk, dag OOL, dag IOL,
string asmstr>
: BForm<opcode, aa, lk, OOL, IOL, asmstr> {
let BIBO{4-0} = bo;
let BIBO{6-5} = 0;
let CR = 0;
}
// 1.7.4 D-Form
class DForm_base<bits<6> opcode, dag OOL, dag IOL, string asmstr,

8
llvm/lib/Target/PowerPC/PPCInstrInfo.td
View File

@ -446,10 +446,10 @@ let isBranch = 1, isTerminator = 1, hasCtrlDep = 1, PPC970_Unit = 7 in {
/*[(PPCcondbranch CRRC:$crS, imm:$opc, bb:$dst)]*/>;
let Defs = [CTR], Uses = [CTR] in {
def BDZ : IForm_ext<16, 18, 0, 0, (outs), (ins condbrtarget:$dst),
"bdz $dst", BrB, []>;
def BDNZ : IForm_ext<16, 16, 0, 0, (outs), (ins condbrtarget:$dst),
"bdnz $dst", BrB, []>;
def BDZ : BForm_1<16, 18, 0, 0, (outs), (ins condbrtarget:$dst),
"bdz $dst">;
def BDNZ : BForm_1<16, 16, 0, 0, (outs), (ins condbrtarget:$dst),
"bdnz $dst">;
}
}