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Implement eret and deret(return from exception) instructions for Mips. Test examples are given.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186507 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Vladimir Medic 2013-07-17 14:05:19 +00:00
parent c88ac4a344
commit 16f385f90f
4 changed files with 49 additions and 10 deletions
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13
lib/Target/Mips/MipsInstrFormats.td
View File

@ -519,6 +519,19 @@ class BRK_FM<bits<6> funct>
let Inst{5-0} = funct;
}
//===----------------------------------------------------------------------===//
// Exception return format <Cop0|1|0|funct>
//===----------------------------------------------------------------------===//
class ER_FM<bits<6> funct>
{
bits<32> Inst;
let Inst{31-26} = 0x10;
let Inst{25} = 1;
let Inst{24-6} = 0;
let Inst{5-0} = funct;
}
//===----------------------------------------------------------------------===//
//
// FLOATING POINT INSTRUCTION FORMATS

8
lib/Target/Mips/MipsInstrInfo.td
View File

@ -652,6 +652,11 @@ class BRK_FT<string opstr> :
InstSE<(outs), (ins uimm10:$code_1, uimm10:$code_2),
!strconcat(opstr, "\t$code_1, $code_2"), [], NoItinerary, FrmOther>;
// (D)Eret
class ER_FT<string opstr> :
InstSE<(outs), (ins),
opstr, [], NoItinerary, FrmOther>;
// Sync
let hasSideEffects = 1 in
class SYNC_FT :
@ -958,6 +963,9 @@ def TEQ : TEQ_FT<"teq", CPURegsOpnd>, TEQ_FM<0x34>;
def BREAK : BRK_FT<"break">, BRK_FM<0xd>;
def SYSCALL : SYS_FT<"syscall">, SYS_FM<0xc>;
def ERET : ER_FT<"eret">, ER_FM<0x18>;
def DERET : ER_FT<"deret">, ER_FM<0x1f>;
/// Load-linked, Store-conditional
let Predicates = [NotN64, HasStdEnc] in {
def LL : LLBase<"ll", CPURegsOpnd, mem>, LW_FM<0x30>;

28
test/MC/Mips/mips-control-instructions.s Normal file
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@ -0,0 +1,28 @@
# RUN: llvm-mc %s -triple=mips-unknown-unknown -show-encoding -mcpu=mips32r2 | \
# RUN: FileCheck -check-prefix=CHECK32 %s
# RUN: llvm-mc %s -triple=mips-unknown-unknown -show-encoding -mcpu=mips64r2 | \
# RUN: FileCheck -check-prefix=CHECK64 %s
# CHECK32: break # encoding: [0x00,0x00,0x00,0x0d]
# CHECK32: break 7, 0 # encoding: [0x00,0x07,0x00,0x0d]
# CHECK32: break 7, 5 # encoding: [0x00,0x07,0x01,0x4d]
# CHECK32: syscall # encoding: [0x00,0x00,0x00,0x0c]
# CHECK32: syscall 13396 # encoding: [0x00,0x0d,0x15,0x0c]
# CHECK32: eret # encoding: [0x42,0x00,0x00,0x18]
# CHECK32: deret # encoding: [0x42,0x00,0x00,0x1f]
# CHECK64: break # encoding: [0x00,0x00,0x00,0x0d]
# CHECK64: break 7, 0 # encoding: [0x00,0x07,0x00,0x0d]
# CHECK64: break 7, 5 # encoding: [0x00,0x07,0x01,0x4d]
# CHECK64: syscall # encoding: [0x00,0x00,0x00,0x0c]
# CHECK64: syscall 13396 # encoding: [0x00,0x0d,0x15,0x0c]
# CHECK64: eret # encoding: [0x42,0x00,0x00,0x18]
# CHECK64: deret # encoding: [0x42,0x00,0x00,0x1f]
break
break 7
break 7,5
syscall
syscall 0x3454
eret
deret

10
test/MC/Mips/mips_directives.s
View File

@ -41,15 +41,5 @@ $JTI0_0:
.set f6,$f6
# CHECK: abs.s $f6, $f7 # encoding: [0x46,0x00,0x39,0x85]
# CHECK: and $3, $15, $15 # encoding: [0x01,0xef,0x18,0x24]
# CHECK: break # encoding: [0x00,0x00,0x00,0x0d]
# CHECK: break 7, 0 # encoding: [0x00,0x07,0x00,0x0d]
# CHECK: break 7, 5 # encoding: [0x00,0x07,0x01,0x4d]
# CHECK: syscall # encoding: [0x00,0x00,0x00,0x0c]
# CHECK: syscall 13396 # encoding: [0x00,0x0d,0x15,0x0c]
abs.s f6,FPU_MASK
and r3,$t7,STORE_MASK
break
break 7
break 7,5
syscall
syscall 0x3454