Index: lib/Target/Mips/Mips32r6InstrInfo.td
===================================================================
--- lib/Target/Mips/Mips32r6InstrInfo.td
+++ lib/Target/Mips/Mips32r6InstrInfo.td
@@ -64,6 +64,8 @@
 class MUHU_ENC   : SPECIAL_3R_FM<0b00011, 0b011001>;
 class MUL_R6_ENC : SPECIAL_3R_FM<0b00010, 0b011000>;
 class MULU_ENC   : SPECIAL_3R_FM<0b00010, 0b011001>;
+class SELEQZ_ENC : SPECIAL_3R_FM<0b00000, 0b110101>;
+class SELNEZ_ENC : SPECIAL_3R_FM<0b00000, 0b110111>;
 class SEL_D_ENC  : COP1_3R_FM<0b010000, FIELD_FMT_D>;
 class SEL_S_ENC  : COP1_3R_FM<0b010000, FIELD_FMT_S>;
 
@@ -105,6 +107,16 @@
 class MUL_R6_DESC : MUL_R6_DESC_BASE<"mul", GPR32Opnd>;
 class MULU_DESC   : MUL_R6_DESC_BASE<"mulu", GPR32Opnd>;
 
+class SELEQNE_Z_DESC_BASE<string instr_asm, RegisterOperand GPROpnd> {
+  dag OutOperandList = (outs GPROpnd:$rd);
+  dag InOperandList = (ins GPROpnd:$rs, GPROpnd:$rt);
+  string AsmString = !strconcat(instr_asm, "\t$rd, $rs, $rt");
+  list<dag> Pattern = [];
+}
+
+class SELEQZ_DESC : SELEQNE_Z_DESC_BASE<"seleqz", GPR32Opnd>;
+class SELNEZ_DESC : SELEQNE_Z_DESC_BASE<"selnez", GPR32Opnd>;
+
 class SEL_DESC_BASE<string instr_asm, RegisterOperand FGROpnd> {
   dag OutOperandList = (outs FGROpnd:$fd);
   dag InOperandList = (ins FGROpnd:$fd_in, FGROpnd:$fs, FGROpnd:$ft);
@@ -225,10 +237,10 @@
 def NAL; // BAL with rd=0
 def RINT_D : RINT_D_ENC, RINT_D_DESC, ISA_MIPS32R6;
 def RINT_S : RINT_S_ENC, RINT_S_DESC, ISA_MIPS32R6;
-def SELEQZ;
+def SELEQZ   : SELEQZ_ENC, SELEQZ_DESC, ISA_MIPS32R6;
 def SELEQZ_D : SELEQZ_D_ENC, SELEQZ_D_DESC, ISA_MIPS32R6;
 def SELEQZ_S : SELEQZ_S_ENC, SELEQZ_S_DESC, ISA_MIPS32R6;
-def SELNEZ;
+def SELNEZ   : SELNEZ_ENC, SELNEZ_DESC, ISA_MIPS32R6;
 def SELNEZ_D : SELNEZ_D_ENC, SELNEZ_D_DESC, ISA_MIPS32R6;
 def SELNEZ_S : SELNEZ_S_ENC, SELNEZ_S_DESC, ISA_MIPS32R6;
 def SEL_D : SEL_D_ENC, SEL_D_DESC, ISA_MIPS32R6;
Index: test/MC/Mips/mips32r6/valid.s
===================================================================
--- test/MC/Mips/mips32r6/valid.s
+++ test/MC/Mips/mips32r6/valid.s
@@ -8,6 +8,8 @@
         muh     $2,$3,$4         # CHECK: muh $2, $3, $4   # encoding: [0x00,0x64,0x10,0xd8]
         mulu    $2,$3,$4         # CHECK: mulu $2, $3, $4  # encoding: [0x00,0x64,0x10,0x99]
         muhu    $2,$3,$4         # CHECK: muhu $2, $3, $4  # encoding: [0x00,0x64,0x10,0xd9]
+        seleqz  $2,$3,$4         # CHECK: seleqz $2, $3, $4 # encoding: [0x00,0x64,0x10,0x35]
+        selnez  $2,$3,$4         # CHECK: selnez $2, $3, $4 # encoding: [0x00,0x64,0x10,0x37]
         sel.d   $f0,$f1,$f2      # CHECK: sel.d $f0, $f1, $f2 # encoding: [0x46,0x22,0x08,0x10]
         sel.s   $f0,$f1,$f2      # CHECK: sel.s $f0, $f1, $f2 # encoding: [0x46,0x02,0x08,0x10]
         max.s   $f0, $f2, $f4    # CHECK: max.s $f0, $f2, $f4 # encoding: [0x46,0x04,0x10,0x1d]
Index: test/MC/Mips/mips64r6/valid.s
===================================================================
--- test/MC/Mips/mips64r6/valid.s
+++ test/MC/Mips/mips64r6/valid.s
@@ -8,6 +8,8 @@
         muh     $2,$3,$4         # CHECK: muh $2, $3, $4   # encoding: [0x00,0x64,0x10,0xd8]
         mulu    $2,$3,$4         # CHECK: mulu $2, $3, $4  # encoding: [0x00,0x64,0x10,0x99]
         muhu    $2,$3,$4         # CHECK: muhu $2, $3, $4  # encoding: [0x00,0x64,0x10,0xd9]
+        seleqz  $2,$3,$4         # CHECK: seleqz $2, $3, $4 # encoding: [0x00,0x64,0x10,0x35]
+        selnez  $2,$3,$4         # CHECK: selnez $2, $3, $4 # encoding: [0x00,0x64,0x10,0x37]
         dmul    $2,$3,$4         # CHECK: dmul $2, $3, $4  # encoding: [0x00,0x64,0x10,0xb8]
         dmuh    $2,$3,$4         # CHECK: dmuh $2, $3, $4  # encoding: [0x00,0x64,0x10,0xf8]
         dmulu   $2,$3,$4         # CHECK: dmulu $2, $3, $4 # encoding: [0x00,0x64,0x10,0xb9]