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[Qemu-devel] [PATCH v2] target-mips: Implement Loongson 3A processor.


From: r
Subject: [Qemu-devel] [PATCH v2] target-mips: Implement Loongson 3A processor.
Date: Thu, 1 Dec 2016 09:46:21 +0800

From: Heiher <address@hidden>

Signed-off-by: Heiher <address@hidden>
---
 target-mips/helper.c         |   4 +-
 target-mips/mips-defs.h      |   5 +
 target-mips/translate.c      | 463 +++++++++++++++++++++++++++++++++++++++++--
 target-mips/translate_init.c |  24 +++
 4 files changed, 481 insertions(+), 15 deletions(-)

diff --git a/target-mips/helper.c b/target-mips/helper.c
index c864b15..a70b20f 100644
--- a/target-mips/helper.c
+++ b/target-mips/helper.c
@@ -715,7 +715,7 @@ void mips_cpu_do_interrupt(CPUState *cs)
             int KX = (env->CP0_Status & (1 << CP0St_KX)) != 0;
 
             if (((R == 0 && UX) || (R == 1 && SX) || (R == 3 && KX)) &&
-                (!(env->insn_flags & (INSN_LOONGSON2E | INSN_LOONGSON2F))))
+                (!(env->insn_flags & INSN_LOONGSON)))
                 offset = 0x080;
             else
 #endif
@@ -734,7 +734,7 @@ void mips_cpu_do_interrupt(CPUState *cs)
             int KX = (env->CP0_Status & (1 << CP0St_KX)) != 0;
 
             if (((R == 0 && UX) || (R == 1 && SX) || (R == 3 && KX)) &&
-                (!(env->insn_flags & (INSN_LOONGSON2E | INSN_LOONGSON2F))))
+                (!(env->insn_flags & INSN_LOONGSON)))
                 offset = 0x080;
             else
 #endif
diff --git a/target-mips/mips-defs.h b/target-mips/mips-defs.h
index 047554e..02dfb22 100644
--- a/target-mips/mips-defs.h
+++ b/target-mips/mips-defs.h
@@ -50,7 +50,11 @@
 /* Chip specific instructions. */
 #define                INSN_LOONGSON2E  0x20000000
 #define                INSN_LOONGSON2F  0x40000000
+#define         INSN_LOONGSON3A  0x10000000
 #define                INSN_VR54XX     0x80000000
+#define         INSN_LOONGSON2   (INSN_LOONGSON2E | INSN_LOONGSON2F)
+#define         INSN_LOONGSON3   (INSN_LOONGSON3A)
+#define         INSN_LOONGSON    (INSN_LOONGSON2 | INSN_LOONGSON3)
 
 /* MIPS CPU defines. */
 #define                CPU_MIPS1       (ISA_MIPS1)
@@ -70,6 +74,7 @@
 /* MIPS Technologies "Release 2" */
 #define                CPU_MIPS32R2    (CPU_MIPS32 | ISA_MIPS32R2)
 #define                CPU_MIPS64R2    (CPU_MIPS64 | CPU_MIPS32R2 | 
ISA_MIPS64R2)
+#define         CPU_LOONGSON3A  (CPU_MIPS64R2 | INSN_LOONGSON3A)
 
 /* MIPS Technologies "Release 3" */
 #define CPU_MIPS32R3 (CPU_MIPS32R2 | ISA_MIPS32R3)
diff --git a/target-mips/translate.c b/target-mips/translate.c
index 57b824f..67378b4 100644
--- a/target-mips/translate.c
+++ b/target-mips/translate.c
@@ -2123,7 +2123,7 @@ static void gen_ld(DisasContext *ctx, uint32_t opc,
 {
     TCGv t0, t1, t2;
 
-    if (rt == 0 && ctx->insn_flags & (INSN_LOONGSON2E | INSN_LOONGSON2F)) {
+    if (rt == 0 && ctx->insn_flags & INSN_LOONGSON) {
         /* Loongson CPU uses a load to zero register for prefetch.
            We emulate it as a NOP. On other CPU we must perform the
            actual memory access. */
@@ -2438,6 +2438,402 @@ static void gen_cop1_ldst(DisasContext *ctx, uint32_t 
op, int rt,
     }
 }
 
+static inline void gen_cop2_gslwlrc1(DisasContext *ctx, TCGv base,
+                          int rt, int rs, int offset, int left)
+{
+    TCGv_i32 t0, t1, t2;
+
+    gen_base_offset_addr(ctx, base, rs, offset);
+    t1 = tcg_temp_new_i32();
+    /* Do a byte access to possibly trigger a page
+       fault with the unaligned address.  */
+    tcg_gen_qemu_ld_i32(t1, base, ctx->mem_idx, MO_UB);
+    tcg_gen_trunc_tl_i32(t1, base);
+    tcg_gen_andi_i32(t1, t1, 3);
+    if (left) {
+        tcg_gen_xori_i32(t1, t1, 3);
+    }
+    tcg_gen_shli_i32(t1, t1, 3);
+    tcg_gen_andi_tl(base, base, ~3);
+    t0 = tcg_temp_new_i32();
+    tcg_gen_qemu_ld_i32(t0, base, ctx->mem_idx, MO_TEUL);
+    if (left) {
+        tcg_gen_shl_i32(t0, t0, t1);
+        t2 = tcg_const_i32(-1);
+    } else {
+        tcg_gen_shr_i32(t0, t0, t1);
+        tcg_gen_xori_i32(t1, t1, 31);
+        t2 = tcg_const_i32(0xfffffffeu);
+    }
+    tcg_gen_shl_i32(t2, t2, t1);
+    gen_load_fpr32(ctx, t1, rt);
+    if (left) {
+        tcg_gen_andc_i32(t1, t1, t2);
+    } else {
+        tcg_gen_and_i32(t1, t1, t2);
+    }
+    tcg_temp_free_i32(t2);
+    tcg_gen_or_i32(t0, t0, t1);
+    tcg_temp_free_i32(t1);
+    gen_store_fpr32(ctx, t0, rt);
+    tcg_temp_free_i32(t0);
+}
+
+static inline void gen_cop2_gsldlrc1(DisasContext *ctx, TCGv base,
+                          int rt, int rs, int offset, int left)
+{
+    TCGv_i64 t0, t1, t2;
+
+    gen_base_offset_addr(ctx, base, rs, offset);
+    t1 = tcg_temp_new_i64();
+    /* Do a byte access to possibly trigger a page
+       fault with the unaligned address.  */
+    tcg_gen_qemu_ld_i64(t1, base, ctx->mem_idx, MO_UB);
+    tcg_gen_ext_tl_i64(t1, base);
+    tcg_gen_andi_i64(t1, t1, 7);
+    if (left) {
+        tcg_gen_xori_i64(t1, t1, 7);
+    }
+    tcg_gen_shli_i64(t1, t1, 3);
+    tcg_gen_andi_tl(base, base, ~7);
+    t0 = tcg_temp_new_i64();
+    tcg_gen_qemu_ld_i64(t0, base, ctx->mem_idx, MO_TEQ);
+    if (left) {
+        tcg_gen_shl_i64(t0, t0, t1);
+        t2 = tcg_const_i64(-1);
+    } else {
+        tcg_gen_shr_i64(t0, t0, t1);
+        tcg_gen_xori_i64(t1, t1, 63);
+        t2 = tcg_const_i64(0xfffffffffffffffeull);
+    }
+    tcg_gen_shl_i64(t2, t2, t1);
+    gen_load_fpr64(ctx, t1, rt);
+    if (left) {
+        tcg_gen_andc_i64(t1, t1, t2);
+    } else {
+        tcg_gen_and_i64(t1, t1, t2);
+    }
+    tcg_temp_free_i64(t2);
+    tcg_gen_or_i64(t0, t0, t1);
+    tcg_temp_free_i64(t1);
+    gen_store_fpr64(ctx, t0, rt);
+    tcg_temp_free_i64(t0);
+}
+
+static void gen_cop2_ldst(DisasContext *ctx, uint32_t op, int rt,
+                          int rs, int rd)
+{
+    TCGv t0 = tcg_temp_new(), t1;
+    TCGv_i32 fp32;
+    TCGv_i64 fp64;
+    int offset, gen_excp_cop2 = 0;
+
+    check_insn(ctx, INSN_LOONGSON3A);
+
+    switch (op) {
+    case OPC_LWC2:
+        offset = (int8_t)(ctx->opcode >> 6);
+        switch (ctx->opcode & 0xc03f) {
+        case 4:      /* gslwlc1 */
+            check_cp1_enabled(ctx);
+            gen_cop2_gslwlrc1(ctx, t0, rt, rs, offset, 1);
+            break;
+        case 5:      /* gslwrc1 */
+            check_cp1_enabled(ctx);
+            gen_cop2_gslwlrc1(ctx, t0, rt, rs, offset, 0);
+            break;
+        case 6:      /* gsldlc1 */
+            check_cp1_enabled(ctx);
+            gen_cop2_gsldlrc1(ctx, t0, rt, rs, offset, 1);
+            break;
+        case 7:      /* gsldrc1 */
+            check_cp1_enabled(ctx);
+            gen_cop2_gsldlrc1(ctx, t0, rt, rs, offset, 0);
+            break;
+        default:
+            gen_excp_cop2++;
+        }
+        offset = ((int)((ctx->opcode >> 6) & 0x1ff) << 23) >> 19;
+        switch (ctx->opcode & 0x8020) {
+#if defined(TARGET_MIPS64)
+        case 0x20:   /* gslq */
+            gen_base_offset_addr(ctx, t0, rs, offset);
+            tcg_gen_qemu_ld_tl(t0, t0, ctx->mem_idx, MO_TEQ |
+                               ctx->default_tcg_memop_mask);
+            gen_store_gpr(t0, rt);
+            gen_base_offset_addr(ctx, t0, rs, offset + 8);
+            tcg_gen_qemu_ld_tl(t0, t0, ctx->mem_idx, MO_TEQ |
+                               ctx->default_tcg_memop_mask);
+            gen_store_gpr(t0, ctx->opcode & 0x1f);
+            break;
+#endif
+        case 0x8020: /* gslqc1 */
+            check_cp1_enabled(ctx);
+            gen_base_offset_addr(ctx, t0, rs, offset);
+            fp64 = tcg_temp_new_i64();
+            tcg_gen_qemu_ld_i64(fp64, t0, ctx->mem_idx, MO_TEQ |
+                               ctx->default_tcg_memop_mask);
+            gen_store_fpr64(ctx, fp64, rt);
+            gen_base_offset_addr(ctx, t0, rs, offset + 8);
+            tcg_gen_qemu_ld_i64(fp64, t0, ctx->mem_idx, MO_TEQ |
+                               ctx->default_tcg_memop_mask);
+            gen_store_fpr64(ctx, fp64, ctx->opcode & 0x1f);
+            tcg_temp_free_i64(fp64);
+            break;
+        default:
+            gen_excp_cop2++;
+        }
+        break;
+    case OPC_LDC2:
+        offset = (int8_t)(ctx->opcode >> 3);
+        switch (ctx->opcode & 0x7) {
+        case 0x0:    /* gslbx */
+            gen_base_offset_addr(ctx, t0, rs, offset);
+            if (rd) {
+                gen_op_addr_add(ctx, t0, cpu_gpr[rd], t0);
+            }
+            tcg_gen_qemu_ld_tl(t0, t0, ctx->mem_idx, MO_SB);
+            gen_store_gpr(t0, rt);
+            break;
+        case 0x1:    /* gslhx */
+            gen_base_offset_addr(ctx, t0, rs, offset);
+            if (rd) {
+                gen_op_addr_add(ctx, t0, cpu_gpr[rd], t0);
+            }
+            tcg_gen_qemu_ld_tl(t0, t0, ctx->mem_idx, MO_TESW |
+                               ctx->default_tcg_memop_mask);
+            gen_store_gpr(t0, rt);
+            break;
+        case 0x2:    /* gslwx */
+            gen_base_offset_addr(ctx, t0, rs, offset);
+            if (rd) {
+                gen_op_addr_add(ctx, t0, cpu_gpr[rd], t0);
+            }
+            tcg_gen_qemu_ld_tl(t0, t0, ctx->mem_idx, MO_TESL |
+                               ctx->default_tcg_memop_mask);
+            gen_store_gpr(t0, rt);
+            break;
+#if defined(TARGET_MIPS64)
+        case 0x3:    /* gsldx */
+            gen_base_offset_addr(ctx, t0, rs, offset);
+            if (rd) {
+                gen_op_addr_add(ctx, t0, cpu_gpr[rd], t0);
+            }
+            tcg_gen_qemu_ld_tl(t0, t0, ctx->mem_idx, MO_TEQ |
+                               ctx->default_tcg_memop_mask);
+            gen_store_gpr(t0, rt);
+            break;
+#endif
+        case 0x6:    /* gslwxc1 */
+            check_cp1_enabled(ctx);
+            gen_base_offset_addr(ctx, t0, rs, offset);
+            if (rd) {
+                gen_op_addr_add(ctx, t0, cpu_gpr[rd], t0);
+            }
+            fp32 = tcg_temp_new_i32();
+            tcg_gen_qemu_ld_i32(fp32, t0, ctx->mem_idx, MO_TESL |
+                               ctx->default_tcg_memop_mask);
+            gen_store_fpr32(ctx, fp32, rt);
+            tcg_temp_free_i32(fp32);
+            break;
+        case 0x7:    /* gsldxc1 */
+            check_cp1_enabled(ctx);
+            gen_base_offset_addr(ctx, t0, rs, offset);
+            if (rd) {
+                gen_op_addr_add(ctx, t0, cpu_gpr[rd], t0);
+            }
+            fp64 = tcg_temp_new_i64();
+            tcg_gen_qemu_ld_i64(fp64, t0, ctx->mem_idx, MO_TEQ |
+                               ctx->default_tcg_memop_mask);
+            gen_store_fpr64(ctx, fp64, rt);
+            tcg_temp_free_i64(fp64);
+            break;
+        default:
+            gen_excp_cop2 = 2;
+        }
+        break;
+    case OPC_SWC2:
+        offset = (int8_t)(ctx->opcode >> 6);
+        switch (ctx->opcode & 0xc03f) {
+        case 4:      /* gsswlc1 */
+            check_cp1_enabled(ctx);
+            t1 = tcg_temp_new();
+            gen_base_offset_addr(ctx, t0, rs, offset);
+            fp32 = tcg_temp_new_i32();
+            gen_load_fpr32(ctx, fp32, rt);
+            tcg_gen_ext_i32_tl(t1, fp32);
+            gen_helper_0e2i(swl, t1, t0, ctx->mem_idx);
+            tcg_temp_free_i32(fp32);
+            tcg_temp_free(t1);
+            break;
+        case 5:      /* gsswrc1 */
+            check_cp1_enabled(ctx);
+            t1 = tcg_temp_new();
+            gen_base_offset_addr(ctx, t0, rs, offset);
+            fp32 = tcg_temp_new_i32();
+            gen_load_fpr32(ctx, fp32, rt);
+            tcg_gen_ext_i32_tl(t1, fp32);
+            gen_helper_0e2i(swr, t1, t0, ctx->mem_idx);
+            tcg_temp_free_i32(fp32);
+            tcg_temp_free(t1);
+            break;
+        case 6:      /* gssdlc1 */
+            check_cp1_enabled(ctx);
+            fp64 = tcg_temp_new_i64();
+            gen_base_offset_addr(ctx, t0, rs, offset);
+            gen_load_fpr64(ctx, fp64, rt);
+#if defined(TARGET_MIPS64)
+            gen_helper_0e2i(sdl, fp64, t0, ctx->mem_idx);
+#else
+            fp32 = tcg_temp_new_i32();
+            tcg_gen_extrl_i64_i32(fp32, fp64);
+            gen_helper_0e2i(swl, fp32, t0, ctx->mem_idx);
+            gen_base_offset_addr(ctx, t0, rs, offset + 4);
+            tcg_gen_extrh_i64_i32(fp32, fp64);
+            gen_helper_0e2i(swl, fp32, t0, ctx->mem_idx);
+            tcg_temp_free_i32(fp32);
+#endif
+            tcg_temp_free_i64(fp64);
+            break;
+        case 7:      /* gssdrc1 */
+            check_cp1_enabled(ctx);
+            fp64 = tcg_temp_new_i64();
+            gen_base_offset_addr(ctx, t0, rs, offset);
+            gen_load_fpr64(ctx, fp64, rt);
+#if defined(TARGET_MIPS64)
+            gen_helper_0e2i(sdr, fp64, t0, ctx->mem_idx);
+#else
+            fp32 = tcg_temp_new_i32();
+            tcg_gen_extrl_i64_i32(fp32, fp64);
+            gen_helper_0e2i(swr, fp32, t0, ctx->mem_idx);
+            gen_base_offset_addr(ctx, t0, rs, offset + 4);
+            tcg_gen_extrh_i64_i32(fp32, fp64);
+            gen_helper_0e2i(swr, fp32, t0, ctx->mem_idx);
+            tcg_temp_free_i32(fp32);
+#endif
+            tcg_temp_free_i64(fp64);
+            break;
+        default:
+            gen_excp_cop2++;
+        }
+        offset = ((int)((ctx->opcode >> 6) & 0x1ff) << 23) >> 19;
+        switch (ctx->opcode & 0x8020) {
+#if defined(TARGET_MIPS64)
+        case 0x20:   /* gssq */
+            t1 = tcg_temp_new();
+            gen_base_offset_addr(ctx, t0, rs, offset);
+            gen_load_gpr(t1, rt);
+            tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx, MO_TEQ |
+                               ctx->default_tcg_memop_mask);
+            gen_base_offset_addr(ctx, t0, rs, offset + 8);
+            gen_load_gpr(t1, ctx->opcode & 0x1f);
+            tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx, MO_TEQ |
+                               ctx->default_tcg_memop_mask);
+            tcg_temp_free(t1);
+            break;
+#endif
+        case 0x8020: /* gssqc1 */
+            check_cp1_enabled(ctx);
+            fp64 = tcg_temp_new_i64();
+            gen_base_offset_addr(ctx, t0, rs, offset);
+            gen_load_fpr64(ctx, fp64, rt);
+            tcg_gen_qemu_st_i64(fp64, t0, ctx->mem_idx, MO_TEQ |
+                               ctx->default_tcg_memop_mask);
+            gen_base_offset_addr(ctx, t0, rs, offset + 8);
+            gen_load_fpr64(ctx, fp64, ctx->opcode & 0x1f);
+            tcg_gen_qemu_st_i64(fp64, t0, ctx->mem_idx, MO_TEQ |
+                               ctx->default_tcg_memop_mask);
+            tcg_temp_free_i64(fp64);
+            break;
+        default:
+            gen_excp_cop2++;
+        }
+        break;
+    case OPC_SDC2:
+        offset = (int8_t)(ctx->opcode >> 3);
+        switch (ctx->opcode & 0x7) {
+        case 0x0:    /* gssbx */
+            gen_base_offset_addr(ctx, t0, rs, offset);
+            if (rd) {
+                gen_op_addr_add(ctx, t0, cpu_gpr[rd], t0);
+            }
+            t1 = tcg_temp_new();
+            gen_load_gpr(t1, rt);
+            tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx, MO_SB);
+            tcg_temp_free(t1);
+            break;
+        case 0x1:    /* gsshx */
+            gen_base_offset_addr(ctx, t0, rs, offset);
+            if (rd) {
+                gen_op_addr_add(ctx, t0, cpu_gpr[rd], t0);
+            }
+            t1 = tcg_temp_new();
+            gen_load_gpr(t1, rt);
+            tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx, MO_TEUW |
+                               ctx->default_tcg_memop_mask);
+            tcg_temp_free(t1);
+            break;
+        case 0x2:    /* gsswx */
+            gen_base_offset_addr(ctx, t0, rs, offset);
+            if (rd) {
+                gen_op_addr_add(ctx, t0, cpu_gpr[rd], t0);
+            }
+            t1 = tcg_temp_new();
+            gen_load_gpr(t1, rt);
+            tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx, MO_TEUL |
+                               ctx->default_tcg_memop_mask);
+            tcg_temp_free(t1);
+            break;
+#if defined(TARGET_MIPS64)
+        case 0x3:    /* gssdx */
+            gen_base_offset_addr(ctx, t0, rs, offset);
+            if (rd) {
+                gen_op_addr_add(ctx, t0, cpu_gpr[rd], t0);
+            }
+            t1 = tcg_temp_new();
+            gen_load_gpr(t1, rt);
+            tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx, MO_TEQ |
+                               ctx->default_tcg_memop_mask);
+            tcg_temp_free(t1);
+            break;
+#endif
+        case 0x6:    /* gsswxc1 */
+            check_cp1_enabled(ctx);
+            gen_base_offset_addr(ctx, t0, rs, offset);
+            if (rd) {
+                gen_op_addr_add(ctx, t0, cpu_gpr[rd], t0);
+            }
+            fp32 = tcg_temp_new_i32();
+            gen_load_fpr32(ctx, fp32, rt);
+            tcg_gen_qemu_st_i32(fp32, t0, ctx->mem_idx, MO_TEUL |
+                                ctx->default_tcg_memop_mask);
+            tcg_temp_free_i32(fp32);
+            break;
+        case 0x7:    /* gssdxc1 */
+            check_cp1_enabled(ctx);
+            gen_base_offset_addr(ctx, t0, rs, offset);
+            if (rd) {
+                gen_op_addr_add(ctx, t0, cpu_gpr[rd], t0);
+            }
+            fp64 = tcg_temp_new_i64();
+            gen_load_fpr64(ctx, fp64, rt);
+            tcg_gen_qemu_st_i64(fp64, t0, ctx->mem_idx, MO_TEQ |
+                                ctx->default_tcg_memop_mask);
+            tcg_temp_free_i64(fp64);
+            break;
+        default:
+            gen_excp_cop2 = 2;
+        }
+        break;
+    default:
+        gen_excp_cop2 = 2;
+    }
+    tcg_temp_free(t0);
+    if (2 == gen_excp_cop2) {
+        generate_exception_err(ctx, EXCP_CpU, 2);
+    }
+}
+
 /* Arithmetic with immediate operand */
 static void gen_arith_imm(DisasContext *ctx, uint32_t opc,
                           int rt, int rs, int16_t imm)
@@ -4083,12 +4479,55 @@ static void gen_loongson_multimedia(DisasContext *ctx, 
int rd, int rs, int rt)
 
     case OPC_SEQU_CP2:
     case OPC_SEQ_CP2:
+        {
+            int cc = (ctx->opcode >> 8) & 0x7;
+            TCGLabel *l1 = gen_new_label();
+            tcg_gen_ori_i32(fpu_fcr31, fpu_fcr31, 1 << get_fp_bit(cc));
+            tcg_gen_brcond_i64(TCG_COND_EQ, t0, t1, l1);
+            tcg_gen_xori_i32(fpu_fcr31, fpu_fcr31, 1 << get_fp_bit(cc));
+            gen_set_label(l1);
+        }
+        goto out;
     case OPC_SLTU_CP2:
+        {
+            int cc = (ctx->opcode >> 8) & 0x7;
+            TCGLabel *l1 = gen_new_label();
+            tcg_gen_ori_i32(fpu_fcr31, fpu_fcr31, 1 << get_fp_bit(cc));
+            tcg_gen_brcond_i64(TCG_COND_LTU, t0, t1, l1);
+            tcg_gen_xori_i32(fpu_fcr31, fpu_fcr31, 1 << get_fp_bit(cc));
+            gen_set_label(l1);
+        }
+        goto out;
     case OPC_SLT_CP2:
+        {
+            int cc = (ctx->opcode >> 8) & 0x7;
+            TCGLabel *l1 = gen_new_label();
+            tcg_gen_ori_i32(fpu_fcr31, fpu_fcr31, 1 << get_fp_bit(cc));
+            tcg_gen_brcond_i64(TCG_COND_LT, t0, t1, l1);
+            tcg_gen_xori_i32(fpu_fcr31, fpu_fcr31, 1 << get_fp_bit(cc));
+            gen_set_label(l1);
+        }
+        goto out;
     case OPC_SLEU_CP2:
+        {
+            int cc = (ctx->opcode >> 8) & 0x7;
+            TCGLabel *l1 = gen_new_label();
+            tcg_gen_ori_i32(fpu_fcr31, fpu_fcr31, 1 << get_fp_bit(cc));
+            tcg_gen_brcond_i64(TCG_COND_LEU, t0, t1, l1);
+            tcg_gen_xori_i32(fpu_fcr31, fpu_fcr31, 1 << get_fp_bit(cc));
+            gen_set_label(l1);
+        }
+        goto out;
     case OPC_SLE_CP2:
-        /* ??? Document is unclear: Set FCC[CC].  Does that mean the
-           FD field is the CC field?  */
+        {
+            int cc = (ctx->opcode >> 8) & 0x7;
+            TCGLabel *l1 = gen_new_label();
+            tcg_gen_ori_i32(fpu_fcr31, fpu_fcr31, 1 << get_fp_bit(cc));
+            tcg_gen_brcond_i64(TCG_COND_LE, t0, t1, l1);
+            tcg_gen_xori_i32(fpu_fcr31, fpu_fcr31, 1 << get_fp_bit(cc));
+            gen_set_label(l1);
+        }
+        goto out;
     default:
         MIPS_INVAL("loongson_cp2");
         generate_exception_end(ctx, EXCP_RI);
@@ -4100,6 +4539,7 @@ static void gen_loongson_multimedia(DisasContext *ctx, 
int rd, int rs, int rt)
 
     gen_store_fpr64(ctx, t0, rd);
 
+out:
     tcg_temp_free_i64(t0);
     tcg_temp_free_i64(t1);
 }
@@ -17066,8 +17506,7 @@ static void decode_opc_special_legacy(CPUMIPSState 
*env, DisasContext *ctx)
     switch (op1) {
     case OPC_MOVN:         /* Conditional move */
     case OPC_MOVZ:
-        check_insn(ctx, ISA_MIPS4 | ISA_MIPS32 |
-                   INSN_LOONGSON2E | INSN_LOONGSON2F);
+        check_insn(ctx, ISA_MIPS4 | ISA_MIPS32 | INSN_LOONGSON);
         gen_cond_move(ctx, op1, rd, rs, rt);
         break;
     case OPC_MFHI:          /* Move from HI/LO */
@@ -17354,7 +17793,7 @@ static void decode_opc_special2_legacy(CPUMIPSState 
*env, DisasContext *ctx)
     case OPC_MULTU_G_2F:
     case OPC_MOD_G_2F:
     case OPC_MODU_G_2F:
-        check_insn(ctx, INSN_LOONGSON2F);
+        check_insn(ctx, INSN_LOONGSON2F | INSN_LOONGSON3A);
         gen_loongson_integer(ctx, op1, rd, rs, rt);
         break;
     case OPC_CLO:
@@ -17386,7 +17825,7 @@ static void decode_opc_special2_legacy(CPUMIPSState 
*env, DisasContext *ctx)
     case OPC_DDIVU_G_2F:
     case OPC_DMOD_G_2F:
     case OPC_DMODU_G_2F:
-        check_insn(ctx, INSN_LOONGSON2F);
+        check_insn(ctx, INSN_LOONGSON2F | INSN_LOONGSON3A);
         gen_loongson_integer(ctx, op1, rd, rs, rt);
         break;
 #endif
@@ -19711,8 +20150,7 @@ static void decode_opc(CPUMIPSState *env, DisasContext 
*ctx)
                                        sextract32(ctx->opcode << 2, 0, 28));
         } else {
             /* OPC_LWC2, OPC_SWC2 */
-            /* COP2: Not implemented. */
-            generate_exception_err(ctx, EXCP_CpU, 2);
+            gen_cop2_ldst(ctx, op, rt, rs, rd);
         }
         break;
     case OPC_BEQZC: /* OPC_JIC, OPC_LDC2 */
@@ -19728,12 +20166,11 @@ static void decode_opc(CPUMIPSState *env, 
DisasContext *ctx)
             }
         } else {
             /* OPC_LWC2, OPC_SWC2 */
-            /* COP2: Not implemented. */
-            generate_exception_err(ctx, EXCP_CpU, 2);
+            gen_cop2_ldst(ctx, op, rt, rs, rd);
         }
         break;
     case OPC_CP2:
-        check_insn(ctx, INSN_LOONGSON2F);
+        check_insn(ctx, INSN_LOONGSON2F | INSN_LOONGSON3A);
         /* Note that these instructions use different fields.  */
         gen_loongson_multimedia(ctx, sa, rd, rt);
         break;
@@ -19913,7 +20350,7 @@ void gen_intermediate_code(CPUMIPSState *env, struct 
TranslationBlock *tb)
     ctx.hflags = (uint32_t)tb->flags; /* FIXME: maybe use 64 bits here? */
     ctx.ulri = (env->CP0_Config3 >> CP0C3_ULRI) & 1;
     ctx.ps = ((env->active_fpu.fcr0 >> FCR0_PS) & 1) ||
-             (env->insn_flags & (INSN_LOONGSON2E | INSN_LOONGSON2F));
+             (env->insn_flags & INSN_LOONGSON);
     ctx.vp = (env->CP0_Config5 >> CP0C5_VP) & 1;
     ctx.mrp = (env->CP0_Config5 >> CP0C5_MRP) & 1;
     ctx.nan2008 = (env->active_fpu.fcr31 >> FCR31_NAN2008) & 1;
diff --git a/target-mips/translate_init.c b/target-mips/translate_init.c
index 6ae23e4..4b0cf02 100644
--- a/target-mips/translate_init.c
+++ b/target-mips/translate_init.c
@@ -772,6 +772,30 @@ static const mips_def_t mips_defs[] =
         .mmu_type = MMU_TYPE_R4000,
     },
     {
+        .name = "Loongson-3A",
+        .CP0_PRid = 0x6308,
+        /* 64KB I-cache and d-cache. 4 way with 32 bit cache line size.  */
+        .CP0_Config0 = MIPS_CONFIG0 | (0x1 << CP0C0_AR) | (0x2 << CP0C0_AT) |
+                       (MMU_TYPE_R4000 << CP0C0_MT),
+        .CP0_Config1 = MIPS_CONFIG1 | (1 << CP0C1_FP) | (63 << CP0C1_MMU) |
+                       (2 << CP0C1_IS) | (4 << CP0C1_IL) | (3 << CP0C1_IA) |
+                       (2 << CP0C1_DS) | (4 << CP0C1_DL) | (3 << CP0C1_DA) |
+                       (1 << CP0C1_PC) | (1 << CP0C1_WR) | (1 << CP0C1_EP),
+        .CP0_Config2 = MIPS_CONFIG2 | (5 << CP0C2_SS) | (5 << CP0C2_SL) |
+                       (3 << CP0C2_SA),
+        .CP0_Config3 = MIPS_CONFIG3 | (1 << CP0C3_LPA) | (1 << CP0C3_ULRI),
+        .SYNCI_Step = 16,
+        .CCRes = 2,
+        .CP0_Status_rw_bitmask = 0xF5D0FFFF,
+        .CP1_fcr0 = (0x5 << FCR0_PRID) | (0x1 << FCR0_REV) | (0x1 << FCR0_F64),
+        .CP1_fcr31 = 0,
+        .CP1_fcr31_rw_bitmask = 0xFF83FFFF,
+        .SEGBITS = 40,
+        .PABITS = 40,
+        .insn_flags = CPU_LOONGSON3A,
+        .mmu_type = MMU_TYPE_R4000,
+    },
+    {
         /* A generic CPU providing MIPS64 ASE DSP 2 features.
            FIXME: Eventually this should be replaced by a real CPU model. */
         .name = "mips64dspr2",
-- 
2.10.2




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