[Qemu-devel] [PATCH v6 04/13] target-mips-ase-dsp: Add load instructions

[Jia Liu]

Add MIPS ASE DSP Load instructions.

Signed-off-by: Jia Liu <address@hidden>
---
 target-mips/translate.c |   69 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)

diff --git a/target-mips/translate.c b/target-mips/translate.c
index b049238..f154f09 100644
--- a/target-mips/translate.c
+++ b/target-mips/translate.c
@@ -313,6 +313,9 @@ enum {
     OPC_MODU_G_2E   = 0x23 | OPC_SPECIAL3,
     OPC_DMOD_G_2E   = 0x26 | OPC_SPECIAL3,
     OPC_DMODU_G_2E  = 0x27 | OPC_SPECIAL3,
+
+    /* MIPS DSP Load */
+    OPC_LX_DSP         = 0x0A | OPC_SPECIAL3,
 };
 
 /* BSHFL opcodes */
@@ -340,6 +343,17 @@ enum {
 #endif
 };
 
+#define MASK_LX(op) (MASK_SPECIAL3(op) | (op & (0x1F << 6)))
+/* MIPS DSP Load */
+enum {
+    OPC_LBUX = (0x06 << 6) | OPC_LX_DSP,
+    OPC_LHX  = (0x04 << 6) | OPC_LX_DSP,
+    OPC_LWX  = (0x00 << 6) | OPC_LX_DSP,
+#if defined(TARGET_MIPS64)
+    OPC_LDX = (0x08 << 6) | OPC_LX_DSP,
+#endif
+};
+
 /* Coprocessor 0 (rs field) */
 #define MASK_CP0(op)       MASK_OP_MAJOR(op) | (op & (0x1F << 21))
 
@@ -12124,6 +12138,61 @@ static void decode_opc (CPUMIPSState *env, 
DisasContext *ctx, int *is_branch)
             check_insn(env, ctx, INSN_LOONGSON2E);
             gen_loongson_integer(ctx, op1, rd, rs, rt);
             break;
+        case OPC_LX_DSP:
+            op2 = MASK_LX(ctx->opcode);
+            switch (op2) {
+            case OPC_LBUX:
+                check_insn(env, ctx, ASE_DSP);
+                {
+                    TCGv addr = tcg_temp_new();
+
+                    save_cpu_state(ctx, 1);
+                    gen_op_addr_add(ctx, addr, cpu_gpr[rs], cpu_gpr[rt]);
+                    op_ld_lbu(cpu_gpr[rd], addr, ctx);
+                    tcg_temp_free(addr);
+                    break;
+                }
+            case OPC_LHX:
+                check_insn(env, ctx, ASE_DSP);
+                {
+                    TCGv addr = tcg_temp_new();
+
+                    save_cpu_state(ctx, 1);
+                    gen_op_addr_add(ctx, addr, cpu_gpr[rs], cpu_gpr[rt]);
+                    op_ld_lh(cpu_gpr[rd], addr, ctx);
+                    tcg_temp_free(addr);
+                    break;
+                }
+            case OPC_LWX:
+                check_insn(env, ctx, ASE_DSP);
+                {
+                    TCGv addr = tcg_temp_new();
+
+                    save_cpu_state(ctx, 1);
+                    gen_op_addr_add(ctx, addr, cpu_gpr[rs], cpu_gpr[rt]);
+                    op_ld_lw(cpu_gpr[rd], addr, ctx);
+                    tcg_temp_free(addr);
+                    break;
+                }
+#if defined(TARGET_MIPS64)
+            case OPC_LDX:
+                check_insn(env, ctx, ASE_DSP);
+                {
+                    TCGv addr = tcg_temp_new();
+
+                    save_cpu_state(ctx, 1);
+                    gen_op_addr_add(ctx, addr, cpu_gpr[rs], cpu_gpr[rt]);
+                    op_ld_ld(cpu_gpr[rd], addr, ctx);
+                    tcg_temp_free(addr);
+                    break;
+                }
+#endif
+            default:            /* Invalid */
+                MIPS_INVAL("MASK LX");
+                generate_exception(ctx, EXCP_RI);
+                break;
+            }
+            break;
 #if defined(TARGET_MIPS64)
         case OPC_DEXTM ... OPC_DEXT:
         case OPC_DINSM ... OPC_DINS:
-- 
1.7.9.5