target-unicore32: Use clz opcode

Signed-off-by: Richard Henderson <rth@twiddle.net>
qemu · Jan 10, 2017 · 03a733d · 03a733d
1 parent 0efa820
commit 03a733d
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Showing 3 changed files with 3 additions and 16 deletions.
diff --git a/target/unicore32/helper.c b/target/unicore32/helper.c
@@ -32,16 +32,6 @@ UniCore32CPU *uc32_cpu_init(const char *cpu_model)
     return UNICORE32_CPU(cpu_generic_init(TYPE_UNICORE32_CPU, cpu_model));
 }
 
-uint32_t HELPER(clo)(uint32_t x)
-{
-    return clo32(x);
-}
-
-uint32_t HELPER(clz)(uint32_t x)
-{
-    return clz32(x);
-}
-
 #ifndef CONFIG_USER_ONLY
 void helper_cp0_set(CPUUniCore32State *env, uint32_t val, uint32_t creg,
         uint32_t cop)

diff --git a/target/unicore32/helper.h b/target/unicore32/helper.h
@@ -13,9 +13,6 @@ DEF_HELPER_3(cp0_get, i32, env, i32, i32)
 DEF_HELPER_1(cp1_putc, void, i32)
 #endif
 
-DEF_HELPER_1(clz, i32, i32)
-DEF_HELPER_1(clo, i32, i32)
-
 DEF_HELPER_2(exception, void, env, i32)
 
 DEF_HELPER_3(asr_write, void, env, i32, i32)

diff --git a/target/unicore32/translate.c b/target/unicore32/translate.c
@@ -1479,10 +1479,10 @@ static void do_misc(CPUUniCore32State *env, DisasContext *s, uint32_t insn)
         /* clz */
         tmp = load_reg(s, UCOP_REG_M);
         if (UCOP_SET(26)) {
-            gen_helper_clo(tmp, tmp);
-        } else {
-            gen_helper_clz(tmp, tmp);
+            /* clo */
+            tcg_gen_not_i32(tmp, tmp);
         }
+        tcg_gen_clzi_i32(tmp, tmp, 32);
         store_reg(s, UCOP_REG_D, tmp);
         return;
     }