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[Mips Assembler] Add alias definitions for jal

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Mips assembler allows following to be used as aliased instructions:
jal $rs for jalr $rs
jal $rd,$rd for jalr $rd,$rs

This patch provides alias definitions in td files and test cases to show the usage.

Contributer: Vladimir Medic


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178304 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jack Carter 2013-03-28 23:02:21 +00:00
parent bad24f757d
commit 94fcfaf3a9
3 changed files with 22 additions and 1 deletions
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4
lib/Target/Mips/Mips64InstrInfo.td
View File

@ -332,6 +332,10 @@ def : InstAlias<"not $rt, $rs",
def : InstAlias<"j $rs", (JR64 CPU64Regs:$rs), 0>, Requires<[HasMips64]>;
def : InstAlias<"jalr $rs", (JALR64 RA_64, CPU64Regs:$rs)>,
Requires<[HasMips64]>;
def : InstAlias<"jal $rs", (JALR64 RA_64, CPU64Regs:$rs), 0>,
Requires<[HasMips64]>;
def : InstAlias<"jal $rd,$rs", (JALR64 CPU64Regs:$rd, CPU64Regs:$rs), 0>,
Requires<[HasMips64]>;
def : InstAlias<"daddu $rs, $rt, $imm",
(DADDiu CPU64RegsOpnd:$rs, CPU64RegsOpnd:$rt, simm16_64:$imm),
1>;

3
lib/Target/Mips/MipsInstrInfo.td
View File

@ -1001,6 +1001,9 @@ def : InstAlias<"and $rs, $rt, $imm",
def : InstAlias<"j $rs", (JR CPURegs:$rs), 0>,
Requires<[NotMips64]>;
def : InstAlias<"jalr $rs", (JALR RA, CPURegs:$rs)>, Requires<[NotMips64]>;
def : InstAlias<"jal $rs", (JALR RA, CPURegs:$rs), 0>, Requires<[NotMips64]>;
def : InstAlias<"jal $rd,$rs", (JALR CPURegs:$rd, CPURegs:$rs), 0>,
Requires<[NotMips64]>;
def : InstAlias<"not $rt, $rs",
(NOR CPURegsOpnd:$rt, CPURegsOpnd:$rs, ZERO), 1>;
def : InstAlias<"neg $rt, $rs",

16
test/MC/Mips/mips-jump-instructions.s
View File

@ -1,4 +1,5 @@
# RUN: llvm-mc %s -triple=mipsel-unknown-linux -show-encoding -mcpu=mips32r2 | FileCheck %s
# RUN: llvm-mc %s -triple=mipsel-unknown-linux -show-encoding -mcpu=mips32r2 | \
# RUN: FileCheck %s
# Check that the assembler can handle the documented syntax
# for jumps and branches.
# CHECK: .section __TEXT,__text,regular,pure_instructions
@ -25,6 +26,9 @@
# CHECK: nop # encoding: [0x00,0x00,0x00,0x00]
# CHECK: bal 1332 # encoding: [0x4d,0x01,0x11,0x04]
# CHECK: nop # encoding: [0x00,0x00,0x00,0x00]
.set noreorder
b 1332
nop
bc1f 1332
@ -63,6 +67,11 @@ end_of_code:
# CHECK: jr $7 # encoding: [0x08,0x00,0xe0,0x00]
# CHECK: nop # encoding: [0x00,0x00,0x00,0x00]
# CHECK: jr $7 # encoding: [0x08,0x00,0xe0,0x00]
# CHECK: nop # encoding: [0x00,0x00,0x00,0x00]
# CHECK: jalr $25 # encoding: [0x09,0xf8,0x20,0x03]
# CHECK: nop # encoding: [0x00,0x00,0x00,0x00]
# CHECK: jalr $4, $25 # encoding: [0x09,0x20,0x20,0x03]
# CHECK: nop # encoding: [0x00,0x00,0x00,0x00]
j 1328
@ -78,3 +87,8 @@ end_of_code:
jr $7
nop
j $7
nop
jal $25
nop
jal $4,$25
nop