diff mbox series

[v8,30/87] target/mips: Add emulation of nanoMIPS 16-bit logic instructions

Message ID 1534182832-554-31-git-send-email-aleksandar.markovic@rt-rk.com
State New
Headers show
Series Add nanoMIPS support to QEMU | expand

Commit Message

Aleksandar Markovic Aug. 13, 2018, 5:52 p.m. UTC 
From: Yongbok Kim <yongbok.kim@mips.com>

Add emulation of NOT16, AND16, XOR16, OR16 instructions.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Yongbok Kim <yongbok.kim@mips.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Stefan Markovic <smarkovic@wavecomp.com>
---
 target/mips/translate.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
diff mbox series

Patch

diff --git a/target/mips/translate.c b/target/mips/translate.c
index 240e3fb..6feb093 100644
--- a/target/mips/translate.c
+++ b/target/mips/translate.c
@@ -16691,6 +16691,27 @@  static inline int decode_gpr_gpr4_zero(int r)
 #define NANOMIPS_EXTRACT_RS5(op) (op & 0x1f)
 
 
+static void gen_pool16c_nanomips_insn(DisasContext *ctx)
+{
+    int rt = decode_gpr_gpr3(NANOMIPS_EXTRACT_RD(ctx->opcode));
+    int rs = decode_gpr_gpr3(NANOMIPS_EXTRACT_RS(ctx->opcode));
+
+    switch (extract32(ctx->opcode, 2, 2)) {
+    case NM_NOT16:
+        gen_logic(ctx, OPC_NOR, rt, rs, 0);
+        break;
+    case NM_AND16:
+        gen_logic(ctx, OPC_AND, rt, rt, rs);
+        break;
+    case NM_XOR16:
+        gen_logic(ctx, OPC_XOR, rt, rt, rs);
+        break;
+    case NM_OR16:
+        gen_logic(ctx, OPC_OR, rt, rt, rs);
+        break;
+    }
+}
+
 static int decode_nanomips_opc(CPUMIPSState *env, DisasContext *ctx)
 {
     uint32_t op;
@@ -16767,6 +16788,7 @@  static int decode_nanomips_opc(CPUMIPSState *env, DisasContext *ctx)
     case NM_P16C:
         switch (ctx->opcode & 1) {
         case NM_POOL16C_0:
+            gen_pool16c_nanomips_insn(ctx);
             break;
         case NM_LWXS16:
             gen_ldxs(ctx, rt, rs, rd);
@@ -16841,6 +16863,12 @@  static int decode_nanomips_opc(CPUMIPSState *env, DisasContext *ctx)
         }
         break;
     case NM_ANDI16:
+        {
+            uint32_t u = extract32(ctx->opcode, 0, 4);
+            u = (u == 12) ? 0xff :
+                (u == 13) ? 0xffff : u;
+            gen_logic_imm(ctx, OPC_ANDI, rt, rs, u);
+        }
         break;
     case NM_P16_LB:
         offset = extract32(ctx->opcode, 0, 2);