[PULL,v4,34/46] target/mips: Add emulation of DSP ASE for nanoMIPS - part 6

Commit Message

Aleksandar Markovic Aug. 23, 2018, 1:34 p.m. UTC

From: Stefan Markovic <[e-mail]>

Add emulation of DSP ASE instructions for nanoMIPS - part 6.

Reviewed-by: Aleksandar Markovic <[e-mail]>
Signed-off-by: Aleksandar Markovic <[e-mail]>
Signed-off-by: Stefan Markovic <[e-mail]>
---
 target/mips/translate.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)

Patch

diff --git a/target/mips/translate.c b/target/mips/translate.c
index c83dad0..c6dc0bc 100644
--- a/target/mips/translate.c
+++ b/target/mips/translate.c
@@ -17912,6 +17912,60 @@  static void gen_pool32axf_4_nanomips_insn(DisasContext *ctx, uint32_t opc,
     tcg_temp_free(t0);
 }
 
+static void gen_pool32axf_7_nanomips_insn(DisasContext *ctx, uint32_t opc,
+                                          int rt, int rs, int rd)
+{
+    TCGv t0 = tcg_temp_new();
+    TCGv rs_t = tcg_temp_new();
+
+    gen_load_gpr(rs_t, rs);
+
+    switch (opc) {
+    case NM_SHRA_R_QB:
+        check_dspr2(ctx);
+        tcg_gen_movi_tl(t0, rd >> 2);
+        switch (extract32(ctx->opcode, 12, 1)) {
+        case 0:
+            /* NM_SHRA_QB */
+            gen_helper_shra_qb(t0, t0, rs_t);
+            gen_store_gpr(t0, rt);
+            break;
+        case 1:
+            /* NM_SHRA_R_QB */
+            gen_helper_shra_r_qb(t0, t0, rs_t);
+            gen_store_gpr(t0, rt);
+            break;
+        }
+        break;
+    case NM_SHRL_PH:
+        check_dspr2(ctx);
+        tcg_gen_movi_tl(t0, rd >> 1);
+        gen_helper_shrl_ph(t0, t0, rs_t);
+        gen_store_gpr(t0, rt);
+        break;
+    case NM_REPL_QB:
+        check_dsp(ctx);
+        {
+            int16_t imm;
+            target_long result;
+            imm = extract32(ctx->opcode, 13, 8);
+            result = (uint32_t)imm << 24 |
+                     (uint32_t)imm << 16 |
+                     (uint32_t)imm << 8  |
+                     (uint32_t)imm;
+            result = (int32_t)result;
+            tcg_gen_movi_tl(t0, result);
+            gen_store_gpr(t0, rt);
+        }
+        break;
+    default:
+        generate_exception_end(ctx, EXCP_RI);
+        break;
+    }
+    tcg_temp_free(t0);
+    tcg_temp_free(rs_t);
+}
+
 
 static void gen_pool32axf_nanomips_insn(CPUMIPSState *env, DisasContext *ctx)
 {
@@ -18007,6 +18061,10 @@  static void gen_pool32axf_nanomips_insn(CPUMIPSState *env, DisasContext *ctx)
         }
         break;
     case NM_POOL32AXF_7:
+        {
+            int32_t op1 = extract32(ctx->opcode, 9, 3);
+            gen_pool32axf_7_nanomips_insn(ctx, op1, rt, rs, rd);
+        }
         break;
     default:
         generate_exception_end(ctx, EXCP_RI);