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[mips] Allow dsubu to take an immediate as an alias for dsubiu.

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Summary:
Patch by David Chisnall
His work was sponsored by: DARPA, AFRL

Differential Revision: http://llvm-reviews.chandlerc.com/D3155

llvm-svn: 204611
This commit is contained in:
Daniel Sanders 2014-03-24 15:38:00 +00:00
parent feee356b52
commit 318ec4f378
2 changed files with 5 additions and 0 deletions
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3
lib/Target/Mips/Mips64InstrInfo.td
View File

@ -403,6 +403,9 @@ def DSUBi : MipsInst<(outs GPR64Opnd: $rt), (ins GPR64Opnd: $rs, simm16_64: $imm
def DSUBiu : MipsInst<(outs GPR64Opnd: $rt), (ins GPR64Opnd: $rs, simm16_64: $imm),
"ssubu\t$rt, $rs, $imm", [], II_DSUB, Pseudo>;
}
def : InstAlias<"dsubu $rt, $rs, $imm",
(DSUBiu GPR64Opnd:$rt, GPR64Opnd:$rs, simm16_64: $imm),
0>;
def : InstAlias<"sub $rs, $imm",
(SUBi GPR32Opnd:$rs, GPR32Opnd:$rs, simm16:$imm),
0>;

2
test/MC/Mips/mips64-alu-instructions.s
View File

@ -83,6 +83,7 @@
# CHECK: multu $3, $5 # encoding: [0x19,0x00,0x65,0x00]
# CHECK: dsub $9, $6, $7 # encoding: [0x2e,0x48,0xc7,0x00]
# CHECK: dsubu $4, $3, $5 # encoding: [0x2f,0x20,0x65,0x00]
# CHECK: daddiu $9, $6, -17767 # encoding: [0x99,0xba,0xc9,0x64]
# CHECK: move $7, $8 # encoding: [0x2d,0x38,0x00,0x01]
# CHECK: .set push
# CHECK: .set mips32r2
@ -107,6 +108,7 @@
multu $3,$5
dsub $9,$6,$7
dsubu $4,$3,$5
dsubu $9,$6,17767
move $7,$8
rdhwr $5, $29