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[mips][microMIPS] Implement BGEZALS and BLTZALS instructions

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Differential Revision: http://reviews.llvm.org/D5004

llvm-svn: 217678
This commit is contained in:
Zoran Jovanovic 2014-09-12 13:51:58 +00:00
parent 29a4b03447
commit e18ff10a80
3 changed files with 23 additions and 0 deletions
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2
lib/Target/Mips/AsmParser/MipsAsmParser.cpp
View File

@ -985,6 +985,8 @@ static bool hasShortDelaySlot(unsigned Opcode) {
switch (Opcode) {
case Mips::JALS_MM:
case Mips::JALRS_MM:
case Mips::BGEZALS_MM:
case Mips::BLTZALS_MM:
return true;
default:
return false;

11
lib/Target/Mips/MicroMipsInstrInfo.td
View File

@ -115,6 +115,11 @@ let isCall = 1, hasDelaySlot = 1, Defs = [RA] in {
class JumpLinkRegMM<string opstr, RegisterOperand RO>:
InstSE<(outs RO:$rd), (ins RO:$rs), !strconcat(opstr, "\t$rd, $rs"),
[], IIBranch, FrmR>;
class BranchCompareToZeroLinkMM<string opstr, DAGOperand opnd,
RegisterOperand RO> :
InstSE<(outs), (ins RO:$rs, opnd:$offset),
!strconcat(opstr, "\t$rs, $offset"), [], IIBranch, FrmI, opstr>;
}
def MFHI16_MM : MoveFromHILOMM<"mfhi", GPR32Opnd, AC0>, MFHILO_FM_MM16<0x10>;
@ -298,6 +303,12 @@ let DecoderNamespace = "MicroMips", Predicates = [InMicroMips] in {
def BLTZAL_MM : MMRel, BGEZAL_FT<"bltzal", brtarget_mm, GPR32Opnd>,
BGEZAL_FM_MM<0x01>;
/// Branch Instructions - Short Delay Slot
def BGEZALS_MM : BranchCompareToZeroLinkMM<"bgezals", brtarget_mm,
GPR32Opnd>, BGEZAL_FM_MM<0x13>;
def BLTZALS_MM : BranchCompareToZeroLinkMM<"bltzals", brtarget_mm,
GPR32Opnd>, BGEZAL_FM_MM<0x11>;
/// Control Instructions
def SYNC_MM : MMRel, SYNC_FT<"sync">, SYNC_FM_MM;
def BREAK_MM : MMRel, BRK_FT<"break">, BRK_FM_MM;

10
test/MC/Mips/micromips-branch-instructions.s
View File

@ -29,6 +29,10 @@
# CHECK-EL: nop # encoding: [0x00,0x00,0x00,0x00]
# CHECK-EL: bltz $6, 1332 # encoding: [0x06,0x40,0x9a,0x02]
# CHECK-EL: nop # encoding: [0x00,0x00,0x00,0x00]
# CHECK-EL: bgezals $6, 1332 # encoding: [0x66,0x42,0x9a,0x02]
# CHECK-EL: move $zero, $zero # encoding: [0x00,0x0c]
# CHECK-EL: bltzals $6, 1332 # encoding: [0x26,0x42,0x9a,0x02]
# CHECK-EL: move $zero, $zero # encoding: [0x00,0x0c]
#------------------------------------------------------------------------------
# Big endian
#------------------------------------------------------------------------------
@ -52,6 +56,10 @@
# CHECK-EB: nop # encoding: [0x00,0x00,0x00,0x00]
# CHECK-EB: bltz $6, 1332 # encoding: [0x40,0x06,0x02,0x9a]
# CHECK-EB: nop # encoding: [0x00,0x00,0x00,0x00]
# CHECK-EB: bgezals $6, 1332 # encoding: [0x42,0x66,0x02,0x9a]
# CHECK-EB: move $zero, $zero # encoding: [0x0c,0x00]
# CHECK-EB: bltzals $6, 1332 # encoding: [0x42,0x26,0x02,0x9a]
# CHECK-EB: move $zero, $zero # encoding: [0x0c,0x00]
b 1332
beq $9,$6,1332
@ -63,3 +71,5 @@
bne $9,$6,1332
bal 1332
bltz $6,1332
bgezals $6,1332
bltzals $6,1332