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target-sh4: use deposit in swap.b instruction 

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Aurelien Jarno 2015-07-05 17:05:08 +02:00
parent 7f6bdc431a
commit 218fd7301f
1 changed files with 2 additions and 6 deletions
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8
target-sh4/translate.c
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@ -612,15 +612,11 @@ static void _decode_opc(DisasContext * ctx)
return;
case 0x6008: /* swap.b Rm,Rn */
{
TCGv high, low;
high = tcg_temp_new();
tcg_gen_andi_i32(high, REG(B7_4), 0xffff0000);
low = tcg_temp_new();
TCGv low = tcg_temp_new();;
tcg_gen_ext16u_i32(low, REG(B7_4));
tcg_gen_bswap16_i32(low, low);
tcg_gen_or_i32(REG(B11_8), high, low);
tcg_gen_deposit_i32(REG(B11_8), REG(B7_4), low, 0, 16);
tcg_temp_free(low);
tcg_temp_free(high);
}
return;
case 0x6009: /* swap.w Rm,Rn */