[PULL 03/19] target/mips/tx79: Introduce PAND/POR/PXOR/PNOR opcodes (parallel logic)

[Philippe Mathieu-Daudé]

Introduce the parallel logic opcodes:

 - PAND (Parallel AND)
 - POR  (Parallel OR)
 - PXOR (Parallel XOR)
 - PNOR (Parallel NOR)

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210214175912.732946-16-f4bug@amsat.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 target/mips/tcg/tx79.decode      |  4 +++
 target/mips/tcg/tx79_translate.c | 54 ++++++++++++++++++++++++++++++++
 2 files changed, 58 insertions(+)

diff --git a/target/mips/tcg/tx79.decode b/target/mips/tcg/tx79.decode
index 0f748b53a64..26c80b9bce5 100644
--- a/target/mips/tcg/tx79.decode
+++ b/target/mips/tcg/tx79.decode
@@ -32,8 +32,12 @@ MTLO1           011100 .....  0000000000 00000 010011   @rs
 # MMI2
 
 PCPYLD          011100 ..... ..... ..... 01110 001001   @rs_rt_rd
+PAND            011100 ..... ..... ..... 10010 001001   @rs_rt_rd
+PXOR            011100 ..... ..... ..... 10011 001001   @rs_rt_rd
 
 # MMI3
 
 PCPYUD          011100 ..... ..... ..... 01110 101001   @rs_rt_rd
+POR             011100 ..... ..... ..... 10010 101001   @rs_rt_rd
+PNOR            011100 ..... ..... ..... 10011 101001   @rs_rt_rd
 PCPYH           011100 00000 ..... ..... 11011 101001   @rt_rd
diff --git a/target/mips/tcg/tx79_translate.c b/target/mips/tcg/tx79_translate.c
index ad83774b977..00364f10d47 100644
--- a/target/mips/tcg/tx79_translate.c
+++ b/target/mips/tcg/tx79_translate.c
@@ -2,6 +2,7 @@
  * Toshiba TX79-specific instructions translation routines
  *
  *  Copyright (c) 2018 Fredrik Noring
+ *  Copyright (c) 2021 Philippe Mathieu-Daudé
  *
  * SPDX-License-Identifier: GPL-2.0-or-later
  */
@@ -114,6 +115,35 @@ static bool trans_MTLO1(DisasContext *ctx, arg_rtype *a)
  * PSUBUW  rd, rs, rt        Parallel Subtract with Unsigned saturation Word
  */
 
+static bool trans_parallel_arith(DisasContext *ctx, arg_rtype *a,
+                                 void (*gen_logic_i64)(TCGv_i64, TCGv_i64, 
TCGv_i64))
+{
+    TCGv_i64 ax, bx;
+
+    if (a->rd == 0) {
+        /* nop */
+        return true;
+    }
+
+    ax = tcg_temp_new_i64();
+    bx = tcg_temp_new_i64();
+
+    /* Lower half */
+    gen_load_gpr(ax, a->rs);
+    gen_load_gpr(bx, a->rt);
+    gen_logic_i64(cpu_gpr[a->rd], ax, bx);
+
+    /* Upper half */
+    gen_load_gpr_hi(ax, a->rs);
+    gen_load_gpr_hi(bx, a->rt);
+    gen_logic_i64(cpu_gpr_hi[a->rd], ax, bx);
+
+    tcg_temp_free(bx);
+    tcg_temp_free(ax);
+
+    return true;
+}
+
 /*
  *     Min/Max (4 instructions)
  *     ------------------------
@@ -139,6 +169,30 @@ static bool trans_MTLO1(DisasContext *ctx, arg_rtype *a)
  * PNOR    rd, rs, rt        Parallel NOR
  */
 
+/* Parallel And */
+static bool trans_PAND(DisasContext *ctx, arg_rtype *a)
+{
+    return trans_parallel_arith(ctx, a, tcg_gen_and_i64);
+}
+
+/* Parallel Or */
+static bool trans_POR(DisasContext *ctx, arg_rtype *a)
+{
+    return trans_parallel_arith(ctx, a, tcg_gen_or_i64);
+}
+
+/* Parallel Exclusive Or */
+static bool trans_PXOR(DisasContext *ctx, arg_rtype *a)
+{
+    return trans_parallel_arith(ctx, a, tcg_gen_xor_i64);
+}
+
+/* Parallel Not Or */
+static bool trans_PNOR(DisasContext *ctx, arg_rtype *a)
+{
+    return trans_parallel_arith(ctx, a, tcg_gen_nor_i64);
+}
+
 /*
  *     Shift (9 instructions)
  *     ----------------------
-- 
2.31.1