target-ppc: add cnttzd[.] instruction

Add ISA3.0 Count trailing zeros double word

Signed-off-by: Sandipan Das <sandipandas1990@gmail.com>
[ added ISA300 flag ]
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

diff --git a/target-ppc/helper.h b/target-ppc/helper.h
index 1f5cfd099067831b8c7567700065afd4cc45634f..0c29c01a0d9230507108dc3dcee2ff6e99a13f3a 100644 (file)
--- a/target-ppc/helper.h
+++ b/target-ppc/helper.h
@@ -44,6 +44,7 @@ DEF_HELPER_FLAGS_2(cmpb, TCG_CALL_NO_RWG_SE, tl, tl, tl)
 DEF_HELPER_3(sraw, tl, env, tl, tl)
 #if defined(TARGET_PPC64)
 DEF_HELPER_FLAGS_1(cntlzd, TCG_CALL_NO_RWG_SE, tl, tl)
+DEF_HELPER_FLAGS_1(cnttzd, 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)
 DEF_HELPER_3(srad, tl, env, tl, tl)

diff --git a/target-ppc/int_helper.c b/target-ppc/int_helper.c
index 74453763d6dd7fca49f612f892473c0ac1d24681..93e8dfa1e730a06ae6d5546da89de4baf13aafa7 100644 (file)
--- a/target-ppc/int_helper.c
+++ b/target-ppc/int_helper.c
@@ -150,6 +150,11 @@ target_ulong helper_cntlzd(target_ulong t)
 {
     return clz64(t);
 }
+
+target_ulong helper_cnttzd(target_ulong t)
+{
+    return ctz64(t);
+}
 #endif
 
 #if defined(TARGET_PPC64)

diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index 90aabb5323622e6dee404f670dda4524be79275f..8eea69216e3b7e43b82db59782ff0ec27889499f 100644 (file)
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -1823,6 +1823,15 @@ static void gen_cntlzd(DisasContext *ctx)
     if (unlikely(Rc(ctx->opcode) != 0))
         gen_set_Rc0(ctx, cpu_gpr[rA(ctx->opcode)]);
 }
+
+/* cnttzd */
+static void gen_cnttzd(DisasContext *ctx)
+{
+    gen_helper_cnttzd(cpu_gpr[rA(ctx->opcode)], cpu_gpr[rS(ctx->opcode)]);
+    if (unlikely(Rc(ctx->opcode) != 0)) {
+        gen_set_Rc0(ctx, cpu_gpr[rA(ctx->opcode)]);
+    }
+}
 #endif
 
 /***                             Integer rotate                            ***/
@@ -10060,6 +10069,7 @@ GEN_HANDLER_E(prtyw, 0x1F, 0x1A, 0x04, 0x0000F801, PPC_NONE, PPC2_ISA205),
 #if defined(TARGET_PPC64)
 GEN_HANDLER(popcntd, 0x1F, 0x1A, 0x0F, 0x0000F801, PPC_POPCNTWD),
 GEN_HANDLER(cntlzd, 0x1F, 0x1A, 0x01, 0x00000000, PPC_64B),
+GEN_HANDLER_E(cnttzd, 0x1F, 0x1A, 0x11, 0x00000000, PPC_NONE, PPC2_ISA300),
 GEN_HANDLER_E(prtyd, 0x1F, 0x1A, 0x05, 0x0000F801, PPC_NONE, PPC2_ISA205),
 GEN_HANDLER_E(bpermd, 0x1F, 0x1C, 0x07, 0x00000001, PPC_NONE, PPC2_PERM_ISA206),
 #endif