[Qemu-devel] [PATCH v14 30/33] target-tilegx: Handle atomic instructions

[Richard Henderson <rth@twiddle.net>]

Signed-off-by: Richard Henderson <rth@twiddle.net>
---
 target-tilegx/translate.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 49 insertions(+), 1 deletion(-)

diff --git a/target-tilegx/translate.c b/target-tilegx/translate.c
index 210e912..2a0798a 100644
--- a/target-tilegx/translate.c
+++ b/target-tilegx/translate.c
@@ -180,6 +180,19 @@ static void gen_saturate_op(TCGv tdest, TCGv tsrca, TCGv tsrcb,
     tcg_temp_free(t0);
 }
 
+static void gen_atomic_excp(DisasContext *dc, unsigned dest, unsigned srca,
+                            unsigned srcb, TileExcp excp)
+{
+#ifdef CONFIG_USER_ONLY
+    TCGv_i32 t = tcg_const_i32((dest << 16) | (srca << 8) | srcb);
+    tcg_gen_st_i32(t, cpu_env, offsetof(CPUTLGState, excparam));
+    tcg_temp_free_i32(t);
+    gen_exception(dc, excp);
+#else
+    gen_exception(dc, TILEGX_EXCP_OPCODE_UNIMPLEMENTED);
+#endif
+}
+
 static void gen_dblaligni(TCGv tdest, TCGv tsrca, TCGv tsrcb, int shr)
 {
     TCGv t0 = tcg_temp_new();
@@ -595,8 +608,13 @@ static TileExcp gen_rrr_opcode(DisasContext *dc, unsigned opext,
         mnemonic = "cmpeq";
         break;
     case OE_RRR(CMPEXCH4, 0, X1):
+        gen_atomic_excp(dc, dest, srca, srcb, TILEGX_EXCP_OPCODE_CMPEXCH4);
+        mnemonic = "cmpexch4";
+        break;
     case OE_RRR(CMPEXCH, 0, X1):
-        return TILEGX_EXCP_OPCODE_UNIMPLEMENTED;
+        gen_atomic_excp(dc, dest, srca, srcb, TILEGX_EXCP_OPCODE_CMPEXCH);
+        mnemonic = "cmpexch";
+        break;
     case OE_RRR(CMPLES, 0, X0):
     case OE_RRR(CMPLES, 0, X1):
     case OE_RRR(CMPLES, 2, Y0):
@@ -662,7 +680,13 @@ static TileExcp gen_rrr_opcode(DisasContext *dc, unsigned opext,
         mnemonic = "dblalign";
         break;
     case OE_RRR(EXCH4, 0, X1):
+        gen_atomic_excp(dc, dest, srca, srcb, TILEGX_EXCP_OPCODE_EXCH4);
+        mnemonic = "exch4";
+        break;
     case OE_RRR(EXCH, 0, X1):
+        gen_atomic_excp(dc, dest, srca, srcb, TILEGX_EXCP_OPCODE_EXCH);
+        mnemonic = "exch";
+        break;
     case OE_RRR(FDOUBLE_ADDSUB, 0, X0):
     case OE_RRR(FDOUBLE_ADD_FLAGS, 0, X0):
     case OE_RRR(FDOUBLE_MUL_FLAGS, 0, X0):
@@ -672,13 +696,37 @@ static TileExcp gen_rrr_opcode(DisasContext *dc, unsigned opext,
     case OE_RRR(FDOUBLE_UNPACK_MAX, 0, X0):
     case OE_RRR(FDOUBLE_UNPACK_MIN, 0, X0):
     case OE_RRR(FETCHADD4, 0, X1):
+        gen_atomic_excp(dc, dest, srca, srcb, TILEGX_EXCP_OPCODE_FETCHADD4);
+        mnemonic = "fetchadd4";
+        break;
     case OE_RRR(FETCHADDGEZ4, 0, X1):
+        gen_atomic_excp(dc, dest, srca, srcb, TILEGX_EXCP_OPCODE_FETCHADDGEZ4);
+        mnemonic = "fetchaddgez4";
+        break;
     case OE_RRR(FETCHADDGEZ, 0, X1):
+        gen_atomic_excp(dc, dest, srca, srcb, TILEGX_EXCP_OPCODE_FETCHADDGEZ);
+        mnemonic = "fetchaddgez";
+        break;
     case OE_RRR(FETCHADD, 0, X1):
+        gen_atomic_excp(dc, dest, srca, srcb, TILEGX_EXCP_OPCODE_FETCHADD);
+        mnemonic = "fetchadd";
+        break;
     case OE_RRR(FETCHAND4, 0, X1):
+        gen_atomic_excp(dc, dest, srca, srcb, TILEGX_EXCP_OPCODE_FETCHAND4);
+        mnemonic = "fetchand4";
+        break;
     case OE_RRR(FETCHAND, 0, X1):
+        gen_atomic_excp(dc, dest, srca, srcb, TILEGX_EXCP_OPCODE_FETCHAND);
+        mnemonic = "fetchand";
+        break;
     case OE_RRR(FETCHOR4, 0, X1):
+        gen_atomic_excp(dc, dest, srca, srcb, TILEGX_EXCP_OPCODE_FETCHOR4);
+        mnemonic = "fetchor4";
+        break;
     case OE_RRR(FETCHOR, 0, X1):
+        gen_atomic_excp(dc, dest, srca, srcb, TILEGX_EXCP_OPCODE_FETCHOR);
+        mnemonic = "fetchor";
+        break;
     case OE_RRR(FSINGLE_ADD1, 0, X0):
     case OE_RRR(FSINGLE_ADDSUB2, 0, X0):
     case OE_RRR(FSINGLE_MUL1, 0, X0):
-- 
2.4.3