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ARM IAS: support implicit immediate 0s for {LD,ST}R{B,}T

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The ARM ARM indicates the mnemonics as follows:

  ldrbt{<c>}{<q>} <Rt>, [<Rn>], {, #+/-<imm>}
  ldrt{<c>}{<q>} <Rt>, [<Rn>] {, #+/-<imm>}
  strbt{<c>}{<q>} <Rt>, [<Rn>] {, #<imm>}
  strt{<c>}{<q>} <Rt>, [<Rn>] {, #+/-<imm>}

This improves the parser to deal with the implicit immediate 0 for the mnemonics
as per the specification.

Thanks to Joerg Sonnenberger for the tests!

llvm-svn: 198914
This commit is contained in:
Saleem Abdulrasool 2014-01-10 04:38:31 +00:00
parent b0841deda2
commit b7a097a617
2 changed files with 53 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

72
lib/Target/ARM/ARMInstrInfo.td
View File

@ -2444,23 +2444,28 @@ def LDRT_POST_REG : AI2ldstidx<1, 0, 0, (outs GPR:$Rt, GPR:$Rn_wb),
let DecoderMethod = "DecodeAddrMode2IdxInstruction";
}
def LDRT_POST_IMM : AI2ldstidx<1, 0, 0, (outs GPR:$Rt, GPR:$Rn_wb),
(ins addr_offset_none:$addr, am2offset_imm:$offset),
IndexModePost, LdFrm, IIC_iLoad_ru,
"ldrt", "\t$Rt, $addr, $offset",
"$addr.base = $Rn_wb", []> {
class LDRTImmediate<bit has_offset, string args, dag iops>
: AI2ldstidx<1, 0, 0, (outs GPR:$Rt, GPR:$Rn_wb), iops,
IndexModePost, LdFrm, IIC_iLoad_ru,
"ldrt", args, "$addr.base = $Rn_wb", []> {
// {12} isAdd
// {11-0} imm12/Rm
bits<14> offset;
bits<4> addr;
let Inst{25} = 0;
let Inst{23} = offset{12};
let Inst{23} = !if(has_offset, offset{12}, 1);
let Inst{21} = 1; // overwrite
let Inst{19-16} = addr;
let Inst{11-0} = offset{11-0};
let Inst{11-0} = !if(has_offset, offset{11-0}, 0);
let DecoderMethod = "DecodeAddrMode2IdxInstruction";
}
def LDRT_POST_IMM
: LDRTImmediate<1, "\t$Rt, $addr, $offset",
(ins addr_offset_none:$addr, am2offset_imm:$offset)>;
def LDRT_POST_IMM_0
: LDRTImmediate<0, "\t$Rt, $addr", (ins addr_offset_none:$addr)>;
def LDRBT_POST_REG : AI2ldstidx<1, 1, 0, (outs GPR:$Rt, GPR:$Rn_wb),
(ins addr_offset_none:$addr, am2offset_reg:$offset),
IndexModePost, LdFrm, IIC_iLoad_bh_ru,
@ -2480,23 +2485,28 @@ def LDRBT_POST_REG : AI2ldstidx<1, 1, 0, (outs GPR:$Rt, GPR:$Rn_wb),
let DecoderMethod = "DecodeAddrMode2IdxInstruction";
}
def LDRBT_POST_IMM : AI2ldstidx<1, 1, 0, (outs GPR:$Rt, GPR:$Rn_wb),
(ins addr_offset_none:$addr, am2offset_imm:$offset),
class LDRBTImmediate<bit has_offset, string args, dag iops>
: AI2ldstidx<1, 1, 0, (outs GPR:$Rt, GPR:$Rn_wb), iops,
IndexModePost, LdFrm, IIC_iLoad_bh_ru,
"ldrbt", "\t$Rt, $addr, $offset",
"$addr.base = $Rn_wb", []> {
"ldrbt", args, "$addr.base = $Rn_wb", []> {
// {12} isAdd
// {11-0} imm12/Rm
bits<14> offset;
bits<4> addr;
let Inst{25} = 0;
let Inst{23} = offset{12};
let Inst{23} = !if(has_offset, offset{12}, 1);
let Inst{21} = 1; // overwrite
let Inst{19-16} = addr;
let Inst{11-0} = offset{11-0};
let Inst{11-0} = !if(has_offset, offset{11-0}, 0);
let DecoderMethod = "DecodeAddrMode2IdxInstruction";
}
def LDRBT_POST_IMM
: LDRBTImmediate<1, "\t$Rt, $addr, $offset",
(ins addr_offset_none:$addr, am2offset_imm:$offset)>;
def LDRBT_POST_IMM_0
: LDRBTImmediate<0, "\t$Rt, $addr", (ins addr_offset_none:$addr)>;
multiclass AI3ldrT<bits<4> op, string opc> {
def i : AI3ldstidxT<op, 1, (outs GPR:$Rt, GPR:$base_wb),
(ins addr_offset_none:$addr, postidx_imm8:$offset),
@ -2748,23 +2758,27 @@ def STRBT_POST_REG : AI2ldstidx<0, 1, 0, (outs GPR:$Rn_wb),
let DecoderMethod = "DecodeAddrMode2IdxInstruction";
}
def STRBT_POST_IMM : AI2ldstidx<0, 1, 0, (outs GPR:$Rn_wb),
(ins GPR:$Rt, addr_offset_none:$addr, am2offset_imm:$offset),
IndexModePost, StFrm, IIC_iStore_bh_ru,
"strbt", "\t$Rt, $addr, $offset",
"$addr.base = $Rn_wb", []> {
class STRBTImmediate<bit has_offset, string args, dag iops>
: AI2ldstidx<0, 1, 0, (outs GPR:$Rn_wb), iops, IndexModePost, StFrm,
IIC_iStore_bh_ru, "strbt", args, "$addr.base = $Rn_wb", []> {
// {12} isAdd
// {11-0} imm12/Rm
bits<14> offset;
bits<4> addr;
let Inst{25} = 0;
let Inst{23} = offset{12};
let Inst{23} = !if(has_offset, offset{12}, 1);
let Inst{21} = 1; // overwrite
let Inst{19-16} = addr;
let Inst{11-0} = offset{11-0};
let Inst{11-0} = !if(has_offset, offset{11-0}, 0);
let DecoderMethod = "DecodeAddrMode2IdxInstruction";
}
def STRBT_POST_IMM
: STRBTImmediate<1, "\t$Rt, $addr, $offset",
(ins GPR:$Rt, addr_offset_none:$addr, am2offset_imm:$offset)>;
def STRBT_POST_IMM_0
: STRBTImmediate<0, "\t$Rt, $addr", (ins GPR:$Rt, addr_offset_none:$addr)>;
let mayStore = 1, neverHasSideEffects = 1 in {
def STRT_POST_REG : AI2ldstidx<0, 0, 0, (outs GPR:$Rn_wb),
(ins GPR:$Rt, addr_offset_none:$addr, am2offset_reg:$offset),
@ -2785,22 +2799,26 @@ def STRT_POST_REG : AI2ldstidx<0, 0, 0, (outs GPR:$Rn_wb),
let DecoderMethod = "DecodeAddrMode2IdxInstruction";
}
def STRT_POST_IMM : AI2ldstidx<0, 0, 0, (outs GPR:$Rn_wb),
(ins GPR:$Rt, addr_offset_none:$addr, am2offset_imm:$offset),
IndexModePost, StFrm, IIC_iStore_ru,
"strt", "\t$Rt, $addr, $offset",
"$addr.base = $Rn_wb", []> {
class STRTImmediate<bit has_offset, string args, dag iops>
: AI2ldstidx<0, 0, 0, (outs GPR:$Rn_wb), iops, IndexModePost, StFrm,
IIC_iStore_ru, "strt", args, "$addr.base = $Rn_wb", []> {
// {12} isAdd
// {11-0} imm12/Rm
bits<14> offset;
bits<4> addr;
let Inst{25} = 0;
let Inst{23} = offset{12};
let Inst{23} = !if(has_offset, offset{12}, 1);
let Inst{21} = 1; // overwrite
let Inst{19-16} = addr;
let Inst{11-0} = offset{11-0};
let Inst{11-0} = !if(has_offset, offset{11-0}, 0);
let DecoderMethod = "DecodeAddrMode2IdxInstruction";
}
def STRT_POST_IMM
: STRTImmediate<1, "\t$Rt, $addr, $offset",
(ins GPR:$Rt, addr_offset_none:$addr, am2offset_imm:$offset)>;
def STRT_POST_IMM_0
: STRTImmediate<0, "\t$Rt, $addr", (ins GPR:$Rt, addr_offset_none:$addr)>;
}

8
test/MC/ARM/arm_addrmode2.s
View File

@ -4,27 +4,35 @@
@ CHECK: ldrt r1, [r0], r2 @ encoding: [0x02,0x10,0xb0,0xe6]
@ CHECK: ldrt r1, [r0], r2, lsr #3 @ encoding: [0xa2,0x11,0xb0,0xe6]
@ CHECK: ldrt r1, [r0], #4 @ encoding: [0x04,0x10,0xb0,0xe4]
@ CHECK: ldrt r1, [r0] @ encoding: [0x00,0x10,0xb0,0xe4]
@ CHECK: ldrbt r1, [r0], r2 @ encoding: [0x02,0x10,0xf0,0xe6]
@ CHECK: ldrbt r1, [r0], r2, lsr #3 @ encoding: [0xa2,0x11,0xf0,0xe6]
@ CHECK: ldrbt r1, [r0], #4 @ encoding: [0x04,0x10,0xf0,0xe4]
@ CHECK: ldrbt r1, [r0] @ encoding: [0x00,0x10,0xf0,0xe4]
@ CHECK: strt r1, [r0], r2 @ encoding: [0x02,0x10,0xa0,0xe6]
@ CHECK: strt r1, [r0], r2, lsr #3 @ encoding: [0xa2,0x11,0xa0,0xe6]
@ CHECK: strt r1, [r0], #4 @ encoding: [0x04,0x10,0xa0,0xe4]
@ CHECK: strt r1, [r0] @ encoding: [0x00,0x10,0xa0,0xe4]
@ CHECK: strbt r1, [r0], r2 @ encoding: [0x02,0x10,0xe0,0xe6]
@ CHECK: strbt r1, [r0], r2, lsr #3 @ encoding: [0xa2,0x11,0xe0,0xe6]
@ CHECK: strbt r1, [r0], #4 @ encoding: [0x04,0x10,0xe0,0xe4]
@ CHECK: strbt r1, [r0] @ encoding: [0x00,0x10,0xe0,0xe4]
ldrt r1, [r0], r2
ldrt r1, [r0], r2, lsr #3
ldrt r1, [r0], #4
ldrt r1, [r0]
ldrbt r1, [r0], r2
ldrbt r1, [r0], r2, lsr #3
ldrbt r1, [r0], #4
ldrbt r1, [r0]
strt r1, [r0], r2
strt r1, [r0], r2, lsr #3
strt r1, [r0], #4
strt r1, [r0]
strbt r1, [r0], r2
strbt r1, [r0], r2, lsr #3
strbt r1, [r0], #4
strbt r1, [r0]
@ Pre-indexed
@ CHECK: ldr r1, [r0, r2, lsr #3]! @ encoding: [0xa2,0x11,0xb0,0xe7]