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Fix the encoding of QADD/SUB, QDADD/SUB. While qadd16, qadd8 use "rd, rn, rm",

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qadd and qdadd uses "rd, rm, rn", the same applies to the 'sub' variants. This
is described in ARM manuals and matches the encoding used by the gnu assembler.

llvm-svn: 123975
This commit is contained in:
Bruno Cardoso Lopes 2011-01-21 14:07:40 +00:00
parent 6a083c355b
commit 2f96371a7a
4 changed files with 48 additions and 15 deletions
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20
lib/Target/ARM/ARMInstrInfo.td
View File

@ -2266,11 +2266,11 @@ def : ARMPat<(adde GPR:$src, so_imm_not:$imm),
// ARM Arithmetic Instruction -- for disassembly only
// GPR:$dst = GPR:$a op GPR:$b
class AAI<bits<8> op27_20, bits<8> op11_4, string opc,
list<dag> pattern = [/* For disassembly only; pattern left blank */]>
: AI<(outs GPR:$Rd), (ins GPR:$Rn, GPR:$Rm), DPFrm, IIC_iALUr,
opc, "\t$Rd, $Rn, $Rm", pattern> {
bits<4> Rd;
list<dag> pattern = [/* For disassembly only; pattern left blank */],
dag iops = (ins GPR:$Rn, GPR:$Rm), string asm = "\t$Rd, $Rn, $Rm">
: AI<(outs GPR:$Rd), iops, DPFrm, IIC_iALUr, opc, asm, pattern> {
bits<4> Rn;
bits<4> Rd;
bits<4> Rm;
let Inst{27-20} = op27_20;
let Inst{11-4} = op11_4;
@ -2282,11 +2282,15 @@ class AAI<bits<8> op27_20, bits<8> op11_4, string opc,
// Saturating add/subtract -- for disassembly only
def QADD : AAI<0b00010000, 0b00000101, "qadd",
[(set GPR:$Rd, (int_arm_qadd GPR:$Rn, GPR:$Rm))]>;
[(set GPR:$Rd, (int_arm_qadd GPR:$Rm, GPR:$Rn))],
(ins GPR:$Rm, GPR:$Rn), "\t$Rd, $Rm, $Rn">;
def QSUB : AAI<0b00010010, 0b00000101, "qsub",
[(set GPR:$Rd, (int_arm_qsub GPR:$Rn, GPR:$Rm))]>;
def QDADD : AAI<0b00010100, 0b00000101, "qdadd">;
def QDSUB : AAI<0b00010110, 0b00000101, "qdsub">;
[(set GPR:$Rd, (int_arm_qsub GPR:$Rm, GPR:$Rn))],
(ins GPR:$Rm, GPR:$Rn), "\t$Rd, $Rm, $Rn">;
def QDADD : AAI<0b00010100, 0b00000101, "qdadd", [], (ins GPR:$Rm, GPR:$Rn),
"\t$Rd, $Rm, $Rn">;
def QDSUB : AAI<0b00010110, 0b00000101, "qdsub", [], (ins GPR:$Rm, GPR:$Rn),
"\t$Rd, $Rm, $Rn">;
def QADD16 : AAI<0b01100010, 0b11110001, "qadd16">;
def QADD8 : AAI<0b01100010, 0b11111001, "qadd8">;

19
lib/Target/ARM/ARMInstrThumb2.td
View File

@ -1856,9 +1856,10 @@ def t2SEL : T2ThreeReg<(outs GPR:$Rd), (ins GPR:$Rn, GPR:$Rm),
// A6.3.13, A6.3.14, A6.3.15 Parallel addition and subtraction (signed/unsigned)
// And Miscellaneous operations -- for disassembly only
class T2I_pam<bits<3> op22_20, bits<4> op7_4, string opc,
list<dag> pat = [/* For disassembly only; pattern left blank */]>
: T2I<(outs rGPR:$Rd), (ins rGPR:$Rn, rGPR:$Rm), NoItinerary, opc,
"\t$Rd, $Rn, $Rm", pat> {
list<dag> pat = [/* For disassembly only; pattern left blank */],
dag iops = (ins rGPR:$Rn, rGPR:$Rm),
string asm = "\t$Rd, $Rn, $Rm">
: T2I<(outs rGPR:$Rd), iops, NoItinerary, opc, asm, pat> {
let Inst{31-27} = 0b11111;
let Inst{26-23} = 0b0101;
let Inst{22-20} = op22_20;
@ -1877,15 +1878,19 @@ class T2I_pam<bits<3> op22_20, bits<4> op7_4, string opc,
// Saturating add/subtract -- for disassembly only
def t2QADD : T2I_pam<0b000, 0b1000, "qadd",
[(set rGPR:$Rd, (int_arm_qadd rGPR:$Rn, rGPR:$Rm))]>;
[(set rGPR:$Rd, (int_arm_qadd rGPR:$Rn, rGPR:$Rm))],
(ins rGPR:$Rm, rGPR:$Rn), "\t$Rd, $Rm, $Rn">;
def t2QADD16 : T2I_pam<0b001, 0b0001, "qadd16">;
def t2QADD8 : T2I_pam<0b000, 0b0001, "qadd8">;
def t2QASX : T2I_pam<0b010, 0b0001, "qasx">;
def t2QDADD : T2I_pam<0b000, 0b1001, "qdadd">;
def t2QDSUB : T2I_pam<0b000, 0b1011, "qdsub">;
def t2QDADD : T2I_pam<0b000, 0b1001, "qdadd", [],
(ins rGPR:$Rm, rGPR:$Rn), "\t$Rd, $Rm, $Rn">;
def t2QDSUB : T2I_pam<0b000, 0b1011, "qdsub", [],
(ins rGPR:$Rm, rGPR:$Rn), "\t$Rd, $Rm, $Rn">;
def t2QSAX : T2I_pam<0b110, 0b0001, "qsax">;
def t2QSUB : T2I_pam<0b000, 0b1010, "qsub",
[(set rGPR:$Rd, (int_arm_qsub rGPR:$Rn, rGPR:$Rm))]>;
[(set rGPR:$Rd, (int_arm_qsub rGPR:$Rn, rGPR:$Rm))],
(ins rGPR:$Rm, rGPR:$Rn), "\t$Rd, $Rm, $Rn">;
def t2QSUB16 : T2I_pam<0b101, 0b0001, "qsub16">;
def t2QSUB8 : T2I_pam<0b100, 0b0001, "qsub8">;
def t2UQADD16 : T2I_pam<0b001, 0b0101, "uqadd16">;

12
test/MC/ARM/arm_instructions.s
View File

@ -164,3 +164,15 @@
@ CHECK: clz r9, r0 @ encoding: [0x10,0x9f,0x6f,0xe1]
clz r9, r0
@ CHECK: qadd r1, r2, r3 @ encoding: [0x52,0x10,0x03,0xe1]
qadd r1, r2, r3
@ CHECK: qsub r1, r2, r3 @ encoding: [0x52,0x10,0x23,0xe1]
qsub r1, r2, r3
@ CHECK: qdadd r1, r2, r3 @ encoding: [0x52,0x10,0x43,0xe1]
qdadd r1, r2, r3
@ CHECK: qdsub r1, r2, r3 @ encoding: [0x52,0x10,0x63,0xe1]
qdsub r1, r2, r3

12
test/MC/ARM/thumb2.s
View File

@ -202,3 +202,15 @@
@ CHECK: clz r9, r0 @ encoding: [0xb0,0xfa,0x80,0xf9]
clz r9, r0
@ CHECK: qadd r1, r2, r3 @ encoding: [0x83,0xfa,0x82,0xf1]
qadd r1, r2, r3
@ CHECK: qsub r1, r2, r3 @ encoding: [0x83,0xfa,0xa2,0xf1]
qsub r1, r2, r3
@ CHECK: qdadd r1, r2, r3 @ encoding: [0x83,0xfa,0x92,0xf1]
qdadd r1, r2, r3
@ CHECK: qdsub r1, r2, r3 @ encoding: [0x83,0xfa,0xb2,0xf1]
qdsub r1, r2, r3