target/mips: Support R5900 DIV1 and DIVU1 instructions

Add support for DIV1 and DIVU1 instructions.

Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Fredrik Noring <noring@nocrew.org>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>

diff --git a/target/mips/translate.c b/target/mips/translate.c
index d7d7145f84f8107acf598d4f0a1cd58a3d01d095..f2aeaf4b6e9076ac34adf43169d94c93f786e4ee 100644 (file)
--- a/target/mips/translate.c
+++ b/target/mips/translate.c
@@ -4593,11 +4593,14 @@ static void gen_muldiv(DisasContext *ctx, uint32_t opc,
     gen_load_gpr(t1, rt);
 
     if (acc != 0) {
-        check_dsp(ctx);
+        if (!(ctx->insn_flags & INSN_R5900)) {
+            check_dsp(ctx);
+        }
     }
 
     switch (opc) {
     case OPC_DIV:
+    case TX79_MMI_DIV1:
         {
             TCGv t2 = tcg_temp_new();
             TCGv t3 = tcg_temp_new();
@@ -4619,6 +4622,7 @@ static void gen_muldiv(DisasContext *ctx, uint32_t opc,
         }
         break;
     case OPC_DIVU:
+    case TX79_MMI_DIVU1:
         {
             TCGv t2 = tcg_const_tl(0);
             TCGv t3 = tcg_const_tl(1);
@@ -24665,6 +24669,10 @@ static void decode_tx79_mmi(CPUMIPSState *env, DisasContext *ctx)
     case TX79_MMI_MULTU1:
         gen_mul_txx9(ctx, opc, rd, rs, rt);
         break;
+    case TX79_MMI_DIV1:
+    case TX79_MMI_DIVU1:
+        gen_muldiv(ctx, opc, 1, rs, rt);
+        break;
     case TX79_MMI_MTLO1:
     case TX79_MMI_MTHI1:
         gen_HILO(ctx, opc, 1, rs);
@@ -24676,8 +24684,6 @@ static void decode_tx79_mmi(CPUMIPSState *env, DisasContext *ctx)
     case TX79_MMI_MADD:          /* TODO: TX79_MMI_MADD */
     case TX79_MMI_MADDU:         /* TODO: TX79_MMI_MADDU */
     case TX79_MMI_PLZCW:         /* TODO: TX79_MMI_PLZCW */
-    case TX79_MMI_DIV1:          /* TODO: TX79_MMI_DIV1 */
-    case TX79_MMI_DIVU1:         /* TODO: TX79_MMI_DIVU1 */
     case TX79_MMI_MADD1:         /* TODO: TX79_MMI_MADD1 */
     case TX79_MMI_MADDU1:        /* TODO: TX79_MMI_MADDU1 */
     case TX79_MMI_PMFHL:         /* TODO: TX79_MMI_PMFHL */