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target-i386: Use add2 to implement the ADX extension

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Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Richard Henderson 2013-02-19 23:52:00 -08:00 committed by Blue Swirl
parent d693e14733
commit 76f1313323
1 changed files with 9 additions and 11 deletions
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20
target-i386/translate.c
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@ -4182,7 +4182,7 @@ static void gen_sse(CPUX86State *env, DisasContext *s, int b,
if (!(s->cpuid_7_0_ebx_features & CPUID_7_0_EBX_ADX)) {
goto illegal_op;
} else {
TCGv carry_in, carry_out;
TCGv carry_in, carry_out, zero;
int end_op;
ot = (s->dflag == 2 ? OT_QUAD : OT_LONG);
@ -4242,18 +4242,16 @@ static void gen_sse(CPUX86State *env, DisasContext *s, int b,
#endif
default:
/* Otherwise compute the carry-out in two steps. */
tcg_gen_add_tl(cpu_T[0], cpu_T[0], cpu_regs[reg]);
tcg_gen_setcond_tl(TCG_COND_LTU, cpu_tmp4,
cpu_T[0], cpu_regs[reg]);
tcg_gen_add_tl(cpu_regs[reg], cpu_T[0], carry_in);
tcg_gen_setcond_tl(TCG_COND_LTU, carry_out,
cpu_regs[reg], cpu_T[0]);
tcg_gen_or_tl(carry_out, carry_out, cpu_tmp4);
zero = tcg_const_tl(0);
tcg_gen_add2_tl(cpu_T[0], carry_out,
cpu_T[0], zero,
carry_in, zero);
tcg_gen_add2_tl(cpu_regs[reg], carry_out,
cpu_regs[reg], carry_out,
cpu_T[0], zero);
tcg_temp_free(zero);
break;
}
/* We began with all flags computed to CC_SRC, and we
have now placed the carry-out in CC_DST. All that
is left is to record the CC_OP. */
set_cc_op(s, end_op);
}
break;