diff --git a/qemu/target-i386/translate.c b/qemu/target-i386/translate.c
index b00113ab..82f5f0fe 100644
--- a/qemu/target-i386/translate.c
+++ b/qemu/target-i386/translate.c
@@ -8187,6 +8187,36 @@ case 0x101:
                     /* bnd registers are now in-use */
                     gen_set_hflag(s, HF_MPX_IU_MASK);
                 }
+            } else if (mod != 3) {
+                /* bndldx */
+                AddressParts a = gen_lea_modrm_0(env, s, modrm);
+                if (reg >= 4
+                    || (prefixes & PREFIX_LOCK)
+                    || s->aflag == MO_16
+                    || a.base < -1) {
+                    goto illegal_op;
+                }
+                if (a.base >= 0) {
+                    tcg_gen_addi_tl(tcg_ctx, cpu_A0, *cpu_regs[a.base], a.disp);
+                } else {
+                    tcg_gen_movi_tl(tcg_ctx, cpu_A0, 0);
+                }
+                gen_lea_v_seg(s, s->aflag, cpu_A0, a.def_seg, s->override);
+                if (a.index >= 0) {
+                    tcg_gen_mov_tl(tcg_ctx, cpu_T0, *cpu_regs[a.index]);
+                } else {
+                    tcg_gen_movi_tl(tcg_ctx, cpu_T0, 0);
+                }
+                if (CODE64(s)) {
+                    gen_helper_bndldx64(tcg_ctx, tcg_ctx->cpu_bndl[reg], cpu_env, cpu_A0, cpu_T0);
+                    tcg_gen_ld_i64(tcg_ctx, tcg_ctx->cpu_bndu[reg], cpu_env,
+                                   offsetof(CPUX86State, mmx_t0.MMX_Q(0)));
+                } else {
+                    gen_helper_bndldx32(tcg_ctx, tcg_ctx->cpu_bndu[reg], cpu_env, cpu_A0, cpu_T0);
+                    tcg_gen_ext32u_i64(tcg_ctx, tcg_ctx->cpu_bndl[reg], tcg_ctx->cpu_bndu[reg]);
+                    tcg_gen_shri_i64(tcg_ctx, tcg_ctx->cpu_bndu[reg], tcg_ctx->cpu_bndu[reg], 32);
+                }
+                gen_set_hflag(s, HF_MPX_IU_MASK);
             }
         }
         gen_nop_modrm(env, s, modrm);
@@ -8262,6 +8292,33 @@ case 0x101:
                                             s->mem_index, MO_LEUL);
                     }
                 }
+            } else if (mod != 3) {
+                /* bndstx */
+                AddressParts a = gen_lea_modrm_0(env, s, modrm);
+                if (reg >= 4
+                    || (prefixes & PREFIX_LOCK)
+                    || s->aflag == MO_16
+                    || a.base < -1) {
+                    goto illegal_op;
+                }
+                if (a.base >= 0) {
+                    tcg_gen_addi_tl(tcg_ctx, cpu_A0, *cpu_regs[a.base], a.disp);
+                } else {
+                    tcg_gen_movi_tl(tcg_ctx, cpu_A0, 0);
+                }
+                gen_lea_v_seg(s, s->aflag, cpu_A0, a.def_seg, s->override);
+                if (a.index >= 0) {
+                    tcg_gen_mov_tl(tcg_ctx, cpu_T0, *cpu_regs[a.index]);
+                } else {
+                    tcg_gen_movi_tl(tcg_ctx, cpu_T0, 0);
+                }
+                if (CODE64(s)) {
+                    gen_helper_bndstx64(tcg_ctx, cpu_env, cpu_A0, cpu_T0,
+                                        tcg_ctx->cpu_bndl[reg], tcg_ctx->cpu_bndu[reg]);
+                } else {
+                    gen_helper_bndstx32(tcg_ctx, cpu_env, cpu_A0, cpu_T0,
+                                        tcg_ctx->cpu_bndl[reg], tcg_ctx->cpu_bndu[reg]);
+                }
             }
         }
         gen_nop_modrm(env, s, modrm);