Index: lib/Target/Mips/MipsInstrInfo.td
===================================================================
--- lib/Target/Mips/MipsInstrInfo.td
+++ lib/Target/Mips/MipsInstrInfo.td
@@ -1207,6 +1207,8 @@
                 (SUBu GPR32Opnd:$rt, ZERO, GPR32Opnd:$rs), 1>;
 def : InstAlias<"slt $rs, $rt, $imm",
                 (SLTi GPR32Opnd:$rs, GPR32Opnd:$rt, simm16:$imm), 0>;
+def : InstAlias<"sltu $rt, $rs, $imm",
+                (SLTiu GPR32Opnd:$rt, GPR32Opnd:$rs, simm16:$imm), 0>;
 def : InstAlias<"xor $rs, $rt, $imm",
                 (XORi GPR32Opnd:$rs, GPR32Opnd:$rt, uimm16:$imm), 0>;
 def : InstAlias<"or $rs, $rt, $imm",
Index: test/MC/Mips/mips1/valid.s
===================================================================
--- test/MC/Mips/mips1/valid.s
+++ test/MC/Mips/mips1/valid.s
@@ -73,6 +73,7 @@
 	slti  $s1,$10,9489         # CHECK: slti $17, $10, 9489    # encoding: [0x29,0x51,0x25,0x11]
 	sltiu $t9,$t9,-15531       # CHECK: sltiu $25, $25, -15531 # encoding: [0x2f,0x39,0xc3,0x55]
 	sltu  $s4,$s5,$11          # CHECK: sltu  $20, $21, $11    # encoding: [0x02,0xab,0xa0,0x2b]
+	sltu  $t8,$t9,-15531       # CHECK: sltiu $24, $25, -15531 # encoding: [0x2f,0x38,0xc3,0x55]
 	sra   $s1,15               # CHECK: sra $17, $17, 15       # encoding: [0x00,0x11,0x8b,0xc3]
 	sra   $s1,$s7,15           # CHECK: sra $17, $23, 15       # encoding: [0x00,0x17,0x8b,0xc3]
 	srav  $s1,$sp              # CHECK: srav $17, $17, $sp     # encoding: [0x03,0xb1,0x88,0x07]
Index: test/MC/Mips/mips2/valid.s
===================================================================
--- test/MC/Mips/mips2/valid.s
+++ test/MC/Mips/mips2/valid.s
@@ -85,6 +85,7 @@
 	slti  $s1,$10,9489         # CHECK: slti $17, $10, 9489    # encoding: [0x29,0x51,0x25,0x11]
 	sltiu $t9,$t9,-15531       # CHECK: sltiu $25, $25, -15531 # encoding: [0x2f,0x39,0xc3,0x55]
 	sltu  $s4,$s5,$11          # CHECK: sltu  $20, $21, $11    # encoding: [0x02,0xab,0xa0,0x2b]
+	sltu  $t8,$t9,-15531       # CHECK: sltiu $24, $25, -15531 # encoding: [0x2f,0x38,0xc3,0x55]
 	sqrt.d	$f17,$f22
 	sqrt.s	$f0,$f1
 	sra   $s1,15               # CHECK: sra $17, $17, 15       # encoding: [0x00,0x11,0x8b,0xc3]
Index: test/MC/Mips/mips3/valid.s
===================================================================
--- test/MC/Mips/mips3/valid.s
+++ test/MC/Mips/mips3/valid.s
@@ -136,6 +136,7 @@
 	slti  $s1,$10,9489         # CHECK: slti $17, $10, 9489    # encoding: [0x29,0x51,0x25,0x11]
 	sltiu $t9,$t9,-15531       # CHECK: sltiu $25, $25, -15531 # encoding: [0x2f,0x39,0xc3,0x55]
 	sltu  $s4,$s5,$11          # CHECK: sltu  $20, $21, $11    # encoding: [0x02,0xab,0xa0,0x2b]
+	sltu  $t8,$t9,-15531       # CHECK: sltiu $24, $25, -15531 # encoding: [0x2f,0x38,0xc3,0x55]
 	sqrt.d	$f17,$f22
 	sqrt.s	$f0,$f1
 	sra   $s1,15               # CHECK: sra $17, $17, 15       # encoding: [0x00,0x11,0x8b,0xc3]
Index: test/MC/Mips/mips32/valid.s
===================================================================
--- test/MC/Mips/mips32/valid.s
+++ test/MC/Mips/mips32/valid.s
@@ -109,6 +109,7 @@
 	slti  $s1,$10,9489         # CHECK: slti $17, $10, 9489    # encoding: [0x29,0x51,0x25,0x11]
 	sltiu $t9,$t9,-15531       # CHECK: sltiu $25, $25, -15531 # encoding: [0x2f,0x39,0xc3,0x55]
 	sltu  $s4,$s5,$11          # CHECK: sltu  $20, $21, $11    # encoding: [0x02,0xab,0xa0,0x2b]
+	sltu  $t8,$t9,-15531       # CHECK: sltiu $24, $25, -15531 # encoding: [0x2f,0x38,0xc3,0x55]
 	sqrt.d	$f17,$f22
 	sqrt.s	$f0,$f1
 	sra   $s1,15               # CHECK: sra $17, $17, 15       # encoding: [0x00,0x11,0x8b,0xc3]
Index: test/MC/Mips/mips32r2/valid.s
===================================================================
--- test/MC/Mips/mips32r2/valid.s
+++ test/MC/Mips/mips32r2/valid.s
@@ -135,6 +135,7 @@
 	slti  $s1,$10,9489         # CHECK: slti $17, $10, 9489    # encoding: [0x29,0x51,0x25,0x11]
 	sltiu $t9,$t9,-15531       # CHECK: sltiu $25, $25, -15531 # encoding: [0x2f,0x39,0xc3,0x55]
 	sltu  $s4,$s5,$11          # CHECK: sltu  $20, $21, $11    # encoding: [0x02,0xab,0xa0,0x2b]
+	sltu  $t8,$t9,-15531       # CHECK: sltiu $24, $25, -15531 # encoding: [0x2f,0x38,0xc3,0x55]
 	sqrt.d	$f17,$f22
 	sqrt.s	$f0,$f1
 	sra   $s1,15               # CHECK: sra $17, $17, 15       # encoding: [0x00,0x11,0x8b,0xc3]
Index: test/MC/Mips/mips4/valid.s
===================================================================
--- test/MC/Mips/mips4/valid.s
+++ test/MC/Mips/mips4/valid.s
@@ -152,6 +152,7 @@
 	slti  $s1,$10,9489         # CHECK: slti $17, $10, 9489    # encoding: [0x29,0x51,0x25,0x11]
 	sltiu $t9,$t9,-15531       # CHECK: sltiu $25, $25, -15531 # encoding: [0x2f,0x39,0xc3,0x55]
 	sltu  $s4,$s5,$11          # CHECK: sltu  $20, $21, $11    # encoding: [0x02,0xab,0xa0,0x2b]
+	sltu  $t8,$t9,-15531       # CHECK: sltiu $24, $25, -15531 # encoding: [0x2f,0x38,0xc3,0x55]
 	sqrt.d	$f17,$f22
 	sqrt.s	$f0,$f1
 	sra   $s1,15               # CHECK: sra $17, $17, 15       # encoding: [0x00,0x11,0x8b,0xc3]
Index: test/MC/Mips/mips5/valid.s
===================================================================
--- test/MC/Mips/mips5/valid.s
+++ test/MC/Mips/mips5/valid.s
@@ -152,6 +152,7 @@
 	slti  $s1,$10,9489         # CHECK: slti $17, $10, 9489    # encoding: [0x29,0x51,0x25,0x11]
 	sltiu $t9,$t9,-15531       # CHECK: sltiu $25, $25, -15531 # encoding: [0x2f,0x39,0xc3,0x55]
 	sltu  $s4,$s5,$11          # CHECK: sltu  $20, $21, $11    # encoding: [0x02,0xab,0xa0,0x2b]
+	sltu  $t8,$t9,-15531       # CHECK: sltiu $24, $25, -15531 # encoding: [0x2f,0x38,0xc3,0x55]
 	sqrt.d	$f17,$f22
 	sqrt.s	$f0,$f1
 	sra   $s1,15               # CHECK: sra $17, $17, 15       # encoding: [0x00,0x11,0x8b,0xc3]
Index: test/MC/Mips/mips64/valid.s
===================================================================
--- test/MC/Mips/mips64/valid.s
+++ test/MC/Mips/mips64/valid.s
@@ -165,6 +165,7 @@
 	slti  $s1,$10,9489         # CHECK: slti $17, $10, 9489    # encoding: [0x29,0x51,0x25,0x11]
 	sltiu $t9,$t9,-15531       # CHECK: sltiu $25, $25, -15531 # encoding: [0x2f,0x39,0xc3,0x55]
 	sltu  $s4,$s5,$11          # CHECK: sltu  $20, $21, $11    # encoding: [0x02,0xab,0xa0,0x2b]
+	sltu  $t8,$t9,-15531       # CHECK: sltiu $24, $25, -15531 # encoding: [0x2f,0x38,0xc3,0x55]
 	sqrt.d	$f17,$f22
 	sqrt.s	$f0,$f1
 	sra   $s1,15               # CHECK: sra $17, $17, 15       # encoding: [0x00,0x11,0x8b,0xc3]
Index: test/MC/Mips/mips64r2/valid.s
===================================================================
--- test/MC/Mips/mips64r2/valid.s
+++ test/MC/Mips/mips64r2/valid.s
@@ -189,6 +189,7 @@
 	slti  $s1,$10,9489         # CHECK: slti $17, $10, 9489    # encoding: [0x29,0x51,0x25,0x11]
 	sltiu $t9,$t9,-15531       # CHECK: sltiu $25, $25, -15531 # encoding: [0x2f,0x39,0xc3,0x55]
 	sltu  $s4,$s5,$11          # CHECK: sltu  $20, $21, $11    # encoding: [0x02,0xab,0xa0,0x2b]
+	sltu  $t8,$t9,-15531       # CHECK: sltiu $24, $25, -15531 # encoding: [0x2f,0x38,0xc3,0x55]
 	sqrt.d	$f17,$f22
 	sqrt.s	$f0,$f1
 	sra   $s1,15               # CHECK: sra $17, $17, 15       # encoding: [0x00,0x11,0x8b,0xc3]