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ARM LDRD binary encoding.

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llvm-svn: 119812
This commit is contained in:
Jim Grosbach 2010-11-19 18:16:46 +00:00
parent be61a90b99
commit c2ac477e54
2 changed files with 12 additions and 22 deletions
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20
lib/Target/ARM/ARMInstrFormats.td
View File

@ -513,8 +513,8 @@ class AXI3<dag oops, dag iops, Format f, InstrItinClass itin,
asm, "", pattern>;
class AI3ld<bits<4> op, dag oops, dag iops, Format f, InstrItinClass itin,
string opc, string asm, list<dag> pattern>
class AI3ld<bits<4> op, bit op20, dag oops, dag iops, Format f,
InstrItinClass itin, string opc, string asm, list<dag> pattern>
: I<oops, iops, AddrMode3, Size4Bytes, IndexModeNone, f, itin,
opc, asm, "", pattern> {
bits<14> addr;
@ -524,27 +524,13 @@ class AI3ld<bits<4> op, dag oops, dag iops, Format f, InstrItinClass itin,
let Inst{23} = addr{8}; // U bit
let Inst{22} = addr{13}; // 1 == imm8, 0 == Rm
let Inst{21} = 0; // W bit
let Inst{20} = 1; // L bit
let Inst{20} = op20; // L bit
let Inst{19-16} = addr{12-9}; // Rn
let Inst{15-12} = Rt; // Rt
let Inst{11-8} = addr{7-4}; // imm7_4/zero
let Inst{7-4} = op;
let Inst{3-0} = addr{3-0}; // imm3_0/Rm
}
// loads
class AI3ldd<dag oops, dag iops, Format f, InstrItinClass itin,
string opc, string asm, list<dag> pattern>
: I<oops, iops, AddrMode3, Size4Bytes, IndexModeNone, f, itin,
opc, asm, "", pattern> {
let Inst{4} = 1;
let Inst{5} = 0; // H bit
let Inst{6} = 1; // S bit
let Inst{7} = 1;
let Inst{20} = 0; // L bit
let Inst{21} = 0; // W bit
let Inst{24} = 1; // P bit
let Inst{27-25} = 0b000;
}
// stores
class AI3sth<dag oops, dag iops, Format f, InstrItinClass itin,

14
lib/Target/ARM/ARMInstrInfo.td
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@ -1563,24 +1563,28 @@ def LDRcp : AIldst1<0b010, 1, 0, (outs GPR:$Rt), (ins addrmode_imm12:$addr),
}
// Loads with zero extension
def LDRH : AI3ld<0b1011, (outs GPR:$Rt), (ins addrmode3:$addr), LdMiscFrm,
def LDRH : AI3ld<0b1011, 1, (outs GPR:$Rt), (ins addrmode3:$addr), LdMiscFrm,
IIC_iLoad_bh_r, "ldrh", "\t$Rt, $addr",
[(set GPR:$Rt, (zextloadi16 addrmode3:$addr))]>;
// Loads with sign extension
def LDRSH : AI3ld<0b1111, (outs GPR:$Rt), (ins addrmode3:$addr), LdMiscFrm,
def LDRSH : AI3ld<0b1111, 1, (outs GPR:$Rt), (ins addrmode3:$addr), LdMiscFrm,
IIC_iLoad_bh_r, "ldrsh", "\t$Rt, $addr",
[(set GPR:$Rt, (sextloadi16 addrmode3:$addr))]>;
def LDRSB : AI3ld<0b1101, (outs GPR:$Rt), (ins addrmode3:$addr), LdMiscFrm,
def LDRSB : AI3ld<0b1101, 1, (outs GPR:$Rt), (ins addrmode3:$addr), LdMiscFrm,
IIC_iLoad_bh_r, "ldrsb", "\t$Rt, $addr",
[(set GPR:$Rt, (sextloadi8 addrmode3:$addr))]>;
let mayLoad = 1, neverHasSideEffects = 1, hasExtraDefRegAllocReq = 1,
isCodeGenOnly = 1 in { // $dst2 doesn't exist in asmstring?
// FIXME: $dst2 isn't in the asm string as it's implied by $Rd (dst2 = Rd+1)
// how to represent that such that tblgen is happy and we don't
// mark this codegen only?
// Load doubleword
def LDRD : AI3ldd<(outs GPR:$dst1, GPR:$dst2), (ins addrmode3:$addr), LdMiscFrm,
IIC_iLoad_d_r, "ldrd", "\t$dst1, $addr",
def LDRD : AI3ld<0b1101, 0, (outs GPR:$Rd, GPR:$dst2),
(ins addrmode3:$addr), LdMiscFrm,
IIC_iLoad_d_r, "ldrd", "\t$Rd, $addr",
[]>, Requires<[IsARM, HasV5TE]>;
// Indexed loads