diff --git a/src/cmd/internal/obj/loong64/a.out.go b/src/cmd/internal/obj/loong64/a.out.go
index 6d41b6aa03..a34a2a50c3 100644
--- a/src/cmd/internal/obj/loong64/a.out.go
+++ b/src/cmd/internal/obj/loong64/a.out.go
@@ -213,7 +213,6 @@ const (
 	C_LACON // $n(REG) where int12 < n <= int32
 	C_LECON
 	C_DACON // $n(REG) where int32 < n
-	C_STCON // $tlsvar
 	C_SBRA
 	C_LBRA
 	C_SAUTO
diff --git a/src/cmd/internal/obj/loong64/asm.go b/src/cmd/internal/obj/loong64/asm.go
index fbfa7024d6..6d21767645 100644
--- a/src/cmd/internal/obj/loong64/asm.go
+++ b/src/cmd/internal/obj/loong64/asm.go
@@ -204,8 +204,6 @@ var optab = []Optab{
 	{AMOVV, C_ADDCON, C_NONE, C_NONE, C_REG, C_NONE, 3, 4, REGZERO, 0},
 	{AMOVW, C_ANDCON, C_NONE, C_NONE, C_REG, C_NONE, 3, 4, REGZERO, 0},
 	{AMOVV, C_ANDCON, C_NONE, C_NONE, C_REG, C_NONE, 3, 4, REGZERO, 0},
-	{AMOVW, C_STCON, C_NONE, C_NONE, C_REG, C_NONE, 55, 12, 0, 0},
-	{AMOVV, C_STCON, C_NONE, C_NONE, C_REG, C_NONE, 55, 12, 0, 0},
 
 	{AMOVW, C_UCON, C_NONE, C_NONE, C_REG, C_NONE, 24, 4, 0, 0},
 	{AMOVV, C_UCON, C_NONE, C_NONE, C_REG, C_NONE, 24, 4, 0, 0},
@@ -759,7 +757,7 @@ func (c *ctxt0) aclass(a *obj.Addr) int {
 
 			c.instoffset = a.Offset
 			if s.Type == objabi.STLSBSS {
-				return C_STCON // address of TLS variable
+				c.ctxt.Diag("taking address of TLS variable is not supported")
 			}
 			return C_LECON
 
@@ -1770,25 +1768,6 @@ func (c *ctxt0) asmout(p *obj.Prog, o *Optab, out []uint32) {
 		o3 = OP_RRR(c.oprrr(AADDV), uint32(REG_R2), uint32(REGTMP), uint32(REGTMP))
 		o4 = OP_12IRR(c.opirr(-p.As), uint32(0), uint32(REGTMP), uint32(p.To.Reg))
 
-	case 55: //  lu12i.w + ori + add r2, regtmp
-		// NOTE: this case does not use REGTMP. If it ever does,
-		// remove the NOTUSETMP flag in optab.
-		o1 = OP_IR(c.opir(ALU12IW), uint32(0), uint32(REGTMP))
-		rel := obj.Addrel(c.cursym)
-		rel.Off = int32(c.pc)
-		rel.Siz = 4
-		rel.Sym = p.From.Sym
-		rel.Add = p.From.Offset
-		rel.Type = objabi.R_LOONG64_TLS_LE_HI
-		o2 = OP_12IRR(c.opirr(AOR), uint32(0), uint32(REGTMP), uint32(REGTMP))
-		rel2 := obj.Addrel(c.cursym)
-		rel2.Off = int32(c.pc + 4)
-		rel2.Siz = 4
-		rel2.Sym = p.From.Sym
-		rel2.Add = p.From.Offset
-		rel2.Type = objabi.R_LOONG64_TLS_LE_LO
-		o3 = OP_RRR(c.oprrr(AADDV), uint32(REG_R2), uint32(REGTMP), uint32(p.To.Reg))
-
 	case 56: // mov r, tlsvar IE model ==> (pcalau12i + ld.d)tlsvar@got + add.d + st.d
 		o1 = OP_IR(c.opir(APCALAU12I), uint32(0), uint32(REGTMP))
 		rel := obj.Addrel(c.cursym)
diff --git a/src/cmd/internal/obj/loong64/cnames.go b/src/cmd/internal/obj/loong64/cnames.go
index 94b1b54c93..3841296f3a 100644
--- a/src/cmd/internal/obj/loong64/cnames.go
+++ b/src/cmd/internal/obj/loong64/cnames.go
@@ -25,7 +25,6 @@ var cnames0 = []string{
 	"LACON",
 	"LECON",
 	"DACON",
-	"STCON",
 	"SBRA",
 	"LBRA",
 	"SAUTO",