target-tilegx: Use clz and ctz opcodes

Signed-off-by: Richard Henderson <rth@twiddle.net>
qemu · Jan 10, 2017 · c3aa369 · c3aa369
1 parent 0f9712b
commit c3aa369
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Showing 3 changed files with 2 additions and 14 deletions.
diff --git a/target/tilegx/helper.c b/target/tilegx/helper.c
@@ -55,16 +55,6 @@ void helper_ext01_ics(CPUTLGState *env)
     }
 }
 
-uint64_t helper_cntlz(uint64_t arg)
-{
-    return clz64(arg);
-}
-
-uint64_t helper_cnttz(uint64_t arg)
-{
-    return ctz64(arg);
-}
-
 uint64_t helper_pcnt(uint64_t arg)
 {
     return ctpop64(arg);

diff --git a/target/tilegx/helper.h b/target/tilegx/helper.h
@@ -1,7 +1,5 @@
 DEF_HELPER_2(exception, noreturn, env, i32)
 DEF_HELPER_1(ext01_ics, void, env)
-DEF_HELPER_FLAGS_1(cntlz, TCG_CALL_NO_RWG_SE, i64, i64)
-DEF_HELPER_FLAGS_1(cnttz, TCG_CALL_NO_RWG_SE, i64, i64)
 DEF_HELPER_FLAGS_1(pcnt, TCG_CALL_NO_RWG_SE, i64, i64)
 DEF_HELPER_FLAGS_1(revbits, TCG_CALL_NO_RWG_SE, i64, i64)
 DEF_HELPER_FLAGS_3(shufflebytes, TCG_CALL_NO_RWG_SE, i64, i64, i64, i64)

diff --git a/target/tilegx/translate.c b/target/tilegx/translate.c
@@ -608,12 +608,12 @@ static TileExcp gen_rr_opcode(DisasContext *dc, unsigned opext,
     switch (opext) {
     case OE_RR_X0(CNTLZ):
     case OE_RR_Y0(CNTLZ):
-        gen_helper_cntlz(tdest, tsrca);
+        tcg_gen_clzi_tl(tdest, tsrca, TARGET_LONG_BITS);
         mnemonic = "cntlz";
         break;
     case OE_RR_X0(CNTTZ):
     case OE_RR_Y0(CNTTZ):
-        gen_helper_cnttz(tdest, tsrca);
+        tcg_gen_ctzi_tl(tdest, tsrca, TARGET_LONG_BITS);
         mnemonic = "cnttz";
         break;
     case OE_RR_X0(FSINGLE_PACK1):