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target-microblaze: Use clz opcode 

Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2016-11-16 10:58:52 +01:00
parent 272694a29d
commit 5318420c62
3 changed files with 1 additions and 7 deletions
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1
target/microblaze/helper.h
View File

@ -3,7 +3,6 @@ DEF_HELPER_1(debug, void, env)
DEF_HELPER_FLAGS_3(carry, TCG_CALL_NO_RWG_SE, i32, i32, i32, i32)
DEF_HELPER_2(cmp, i32, i32, i32)
DEF_HELPER_2(cmpu, i32, i32, i32)
DEF_HELPER_FLAGS_1(clz, TCG_CALL_NO_RWG_SE, i32, i32)
DEF_HELPER_3(divs, i32, env, i32, i32)
DEF_HELPER_3(divu, i32, env, i32, i32)

5
target/microblaze/op_helper.c
View File

@ -145,11 +145,6 @@ uint32_t helper_cmpu(uint32_t a, uint32_t b)
return t;
}
uint32_t helper_clz(uint32_t t0)
{
return clz32(t0);
}
uint32_t helper_carry(uint32_t a, uint32_t b, uint32_t cf)
{
return compute_carry(a, b, cf);

2
target/microblaze/translate.c
View File

@ -768,7 +768,7 @@ static void dec_bit(DisasContext *dc)
t_gen_raise_exception(dc, EXCP_HW_EXCP);
}
if (dc->cpu->env.pvr.regs[2] & PVR2_USE_PCMP_INSTR) {
gen_helper_clz(cpu_R[dc->rd], cpu_R[dc->ra]);
tcg_gen_clzi_i32(cpu_R[dc->rd], cpu_R[dc->ra], 32);
}
break;
case 0x1e0: