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target-cris: Use clz opcode 

Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2016-11-16 10:54:57 +01:00
parent 881549da4b
commit 272694a29d
3 changed files with 1 additions and 7 deletions
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1
target/cris/helper.h
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@ -7,7 +7,6 @@ DEF_HELPER_1(rfn, void, env)
DEF_HELPER_3(movl_sreg_reg, void, env, i32, i32)
DEF_HELPER_3(movl_reg_sreg, void, env, i32, i32)
DEF_HELPER_FLAGS_1(lz, TCG_CALL_NO_SE, i32, i32)
DEF_HELPER_FLAGS_4(btst, TCG_CALL_NO_SE, i32, env, i32, i32, i32)
DEF_HELPER_FLAGS_4(evaluate_flags_muls, TCG_CALL_NO_SE, i32, env, i32, i32, i32)

5
target/cris/op_helper.c
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@ -230,11 +230,6 @@ void helper_rfn(CPUCRISState *env)
env->pregs[PR_CCS] |= M_FLAG_V32;
}
uint32_t helper_lz(uint32_t t0)
{
return clz32(t0);
}
uint32_t helper_btst(CPUCRISState *env, uint32_t t0, uint32_t t1, uint32_t ccs)
{
/* FIXME: clean this up. */

2
target/cris/translate.c
View File

@ -767,7 +767,7 @@ static void cris_alu_op_exec(DisasContext *dc, int op,
t_gen_subx_carry(dc, dst);
break;
case CC_OP_LZ:
gen_helper_lz(dst, b);
tcg_gen_clzi_tl(dst, b, TARGET_LONG_BITS);
break;
case CC_OP_MULS:
tcg_gen_muls2_tl(dst, cpu_PR[PR_MOF], a, b);