[Qemu-ppc] [RFC v2 06/13] target-ppc: add modulo dword operations

[Nikunj A Dadhania]

Adding following instructions for ISA3.0 support

modud: Modulo Unsigned Dword
modsd: Modulo Signed Dword

Signed-off-by: Nikunj A Dadhania <address@hidden>
---
 target-ppc/helper.h     |  2 ++
 target-ppc/int_helper.c | 16 ++++++++++++++++
 target-ppc/translate.c  | 15 +++++++++++++++
 3 files changed, 33 insertions(+)

diff --git a/target-ppc/helper.h b/target-ppc/helper.h
index 76072fd..26a0930 100644
--- a/target-ppc/helper.h
+++ b/target-ppc/helper.h
@@ -45,6 +45,8 @@ DEF_HELPER_FLAGS_2(modsw, TCG_CALL_NO_RWG_SE, i32, i32, i32)
 DEF_HELPER_FLAGS_2(moduw, TCG_CALL_NO_RWG_SE, i32, i32, i32)
 DEF_HELPER_3(sraw, tl, env, tl, tl)
 #if defined(TARGET_PPC64)
+DEF_HELPER_FLAGS_2(modsd, TCG_CALL_NO_RWG_SE, i64, i64, i64)
+DEF_HELPER_FLAGS_2(modud, TCG_CALL_NO_RWG_SE, i64, i64, i64)
 DEF_HELPER_FLAGS_1(cntlzd, TCG_CALL_NO_RWG_SE, tl, tl)
 DEF_HELPER_FLAGS_1(popcntd, TCG_CALL_NO_RWG_SE, tl, tl)
 DEF_HELPER_FLAGS_2(bpermd, TCG_CALL_NO_RWG_SE, i64, i64, i64)
diff --git a/target-ppc/int_helper.c b/target-ppc/int_helper.c
index 631e0b4..e95572b 100644
--- a/target-ppc/int_helper.c
+++ b/target-ppc/int_helper.c
@@ -161,6 +161,22 @@ target_ulong helper_cntlzw(target_ulong t)
 }
 
 #if defined(TARGET_PPC64)
+uint64_t helper_modsd(uint64_t rau, uint64_t rbu)
+{
+    int64_t ra = (int64_t)rau;
+    int64_t rb = (int64_t)rbu;
+
+    if ((rb == 0) || (ra == INT32_MIN && rb == -1)) {
+        return 0;
+    }
+    return ra % rb;
+}
+
+uint64_t helper_modud(uint64_t ra, uint64_t rb)
+{
+    return rb ? ra % rb : 0;
+}
+
 target_ulong helper_cntlzd(target_ulong t)
 {
     return clz64(t);
diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index 4348efd..38a117c 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -1192,6 +1192,19 @@ static void glue(gen_, name)(DisasContext *ctx)          
               \
 GEN_INT_ARITH_MODW(moduw, 0x08, 0);
 GEN_INT_ARITH_MODW(modsw, 0x18, 1);
 
+#if defined(TARGET_PPC64)
+#define GEN_INT_ARITH_MODD(name, opc3, sign)                            \
+    static void glue(gen_, name)(DisasContext *ctx)                     \
+{                                                                       \
+    gen_helper_##name(cpu_gpr[rD(ctx->opcode)],                         \
+                      cpu_gpr[rA(ctx->opcode)],                         \
+                      cpu_gpr[rB(ctx->opcode)]);                        \
+}
+
+GEN_INT_ARITH_MODD(modud, 0x08, 0);
+GEN_INT_ARITH_MODD(modsd, 0x18, 1);
+#endif
+
 /* mulhw  mulhw. */
 static void gen_mulhw(DisasContext *ctx)
 {
@@ -10274,6 +10287,8 @@ GEN_HANDLER_E(divdeu, 0x1F, 0x09, 0x0C, 0, PPC_NONE, 
PPC2_DIVE_ISA206),
 GEN_HANDLER_E(divdeuo, 0x1F, 0x09, 0x1C, 0, PPC_NONE, PPC2_DIVE_ISA206),
 GEN_HANDLER_E(divde, 0x1F, 0x09, 0x0D, 0, PPC_NONE, PPC2_DIVE_ISA206),
 GEN_HANDLER_E(divdeo, 0x1F, 0x09, 0x1D, 0, PPC_NONE, PPC2_DIVE_ISA206),
+GEN_HANDLER_E(modsd, 0x1F, 0x09, 0x18, 0x00000001, PPC_NONE, PPC2_ISA300),
+GEN_HANDLER_E(modud, 0x1F, 0x09, 0x08, 0x00000001, PPC_NONE, PPC2_ISA300),
 
 #undef GEN_INT_ARITH_MUL_HELPER
 #define GEN_INT_ARITH_MUL_HELPER(name, opc3)                                  \
-- 
2.7.4