target/mips: Convert Vr54xx MACC* opcodes to decodetree

Convert the following Integer Multiply-Accumulate opcodes:

 * MACC         Multiply, accumulate, and move LO
 * MACCHI       Multiply, accumulate, and move HI
 * MACCHIU      Unsigned multiply, accumulate, and move HI
 * MACCU        Unsigned multiply, accumulate, and move LO

Since all opcodes are generated using the same pattern, we
add the gen_helper_mult_acc_t typedef and MULT_ACC() macro
to remove boilerplate code.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210808173018.90960-6-f4bug@amsat.org>

target/mips/tcg/translate.c

@@ -300,16 +300,12 @@ enum {
 enum {
     OPC_VR54XX_MULS    = (0x03 << 6) | OPC_MULT,
     OPC_VR54XX_MULSU   = (0x03 << 6) | OPC_MULTU,
-    OPC_VR54XX_MACC    = (0x05 << 6) | OPC_MULT,
-    OPC_VR54XX_MACCU   = (0x05 << 6) | OPC_MULTU,
     OPC_VR54XX_MSAC    = (0x07 << 6) | OPC_MULT,
     OPC_VR54XX_MSACU   = (0x07 << 6) | OPC_MULTU,
     OPC_VR54XX_MULHI   = (0x09 << 6) | OPC_MULT,
     OPC_VR54XX_MULHIU  = (0x09 << 6) | OPC_MULTU,
     OPC_VR54XX_MULSHI  = (0x0B << 6) | OPC_MULT,
     OPC_VR54XX_MULSHIU = (0x0B << 6) | OPC_MULTU,
-    OPC_VR54XX_MACCHI  = (0x0D << 6) | OPC_MULT,
-    OPC_VR54XX_MACCHIU = (0x0D << 6) | OPC_MULTU,
     OPC_VR54XX_MSACHI  = (0x0F << 6) | OPC_MULT,
     OPC_VR54XX_MSACHIU = (0x0F << 6) | OPC_MULTU,
 };
@@ -3780,12 +3776,6 @@ static void gen_mul_vr54xx(DisasContext *ctx, uint32_t opc,
     case OPC_VR54XX_MULSU:
         gen_helper_mulsu(t0, cpu_env, t0, t1);
         break;
-    case OPC_VR54XX_MACC:
-        gen_helper_macc(t0, cpu_env, t0, t1);
-        break;
-    case OPC_VR54XX_MACCU:
-        gen_helper_maccu(t0, cpu_env, t0, t1);
-        break;
     case OPC_VR54XX_MSAC:
         gen_helper_msac(t0, cpu_env, t0, t1);
         break;
@@ -3804,12 +3794,6 @@ static void gen_mul_vr54xx(DisasContext *ctx, uint32_t opc,
     case OPC_VR54XX_MULSHIU:
         gen_helper_mulshiu(t0, cpu_env, t0, t1);
         break;
-    case OPC_VR54XX_MACCHI:
-        gen_helper_macchi(t0, cpu_env, t0, t1);
-        break;
-    case OPC_VR54XX_MACCHIU:
-        gen_helper_macchiu(t0, cpu_env, t0, t1);
-        break;
     case OPC_VR54XX_MSACHI:
         gen_helper_msachi(t0, cpu_env, t0, t1);
         break;

target/mips/tcg/vr54xx.decode

@@ -6,3 +6,12 @@
 #
 # Reference: VR5432 Microprocessor User’s Manual
 #            (Document Number U13751EU5V0UM00)
+
+&r              rs rt rd
+
+@rs_rt_rd       ...... rs:5  rt:5  rd:5  ..... ......   &r
+
+MACC            000000 ..... ..... ..... 00101011000    @rs_rt_rd
+MACCU           000000 ..... ..... ..... 00101011001    @rs_rt_rd
+MACCHI          000000 ..... ..... ..... 01101011000    @rs_rt_rd
+MACCHIU         000000 ..... ..... ..... 01101011001    @rs_rt_rd

target/mips/tcg/vr54xx_translate.c

@@ -17,3 +17,36 @@
 
 /* Include the auto-generated decoder. */
 #include "decode-vr54xx.c.inc"
+
+/*
+ * Integer Multiply-Accumulate Instructions
+ *
+ * MACC         Multiply, accumulate, and move LO
+ * MACCHI       Multiply, accumulate, and move HI
+ * MACCHIU      Unsigned multiply, accumulate, and move HI
+ * MACCU        Unsigned multiply, accumulate, and move LO
+ */
+
+static bool trans_mult_acc(DisasContext *ctx, arg_r *a,
+                           void (*gen_helper_mult_acc)(TCGv, TCGv_ptr, TCGv, TCGv))
+{
+    TCGv t0 = tcg_temp_new();
+    TCGv t1 = tcg_temp_new();
+
+    gen_load_gpr(t0, a->rs);
+    gen_load_gpr(t1, a->rt);
+
+    gen_helper_mult_acc(t0, cpu_env, t0, t1);
+
+    gen_store_gpr(t0, a->rd);
+
+    tcg_temp_free(t0);
+    tcg_temp_free(t1);
+
+    return false;
+}
+
+TRANS(MACC,     trans_mult_acc, gen_helper_macc);
+TRANS(MACCHI,   trans_mult_acc, gen_helper_macchi);
+TRANS(MACCHIU,  trans_mult_acc, gen_helper_macchiu);
+TRANS(MACCU,    trans_mult_acc, gen_helper_maccu);