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target-xtensa: implement RT0 group

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NEG and ABS are the only members of RT0 group.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Max Filippov 2011-09-06 03:55:29 +04:00 • committed by Blue Swirl
parent 67882fd177
commit f331fe5e5f
1 changed files with 19 additions and 0 deletions
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19
target-xtensa/translate.c
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@ -255,6 +255,25 @@ static void disas_xtensa_insn(DisasContext *dc)
break; break;
case 6: /*RT0*/ case 6: /*RT0*/
switch (RRR_S) {
case 0: /*NEG*/
tcg_gen_neg_i32(cpu_R[RRR_R], cpu_R[RRR_T]);
break;
case 1: /*ABS*/
{
int label = gen_new_label();
tcg_gen_mov_i32(cpu_R[RRR_R], cpu_R[RRR_T]);
tcg_gen_brcondi_i32(
TCG_COND_GE, cpu_R[RRR_R], 0, label);
tcg_gen_neg_i32(cpu_R[RRR_R], cpu_R[RRR_T]);
gen_set_label(label);
}
break;
default: /*reserved*/
break;
}
break; break;
case 7: /*reserved*/ case 7: /*reserved*/