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target-sparc: fix udiv(cc) and sdiv(cc)

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Since commit 5a4bb580cd, Xorg crashes on
a Debian Etch image. The commit itself is fine, but it triggers a bug
due to wrong computation of flags for udiv(cc) and sdiv(cc).

This patch only compute cc_src2 for the cc version of udiv/sdiv. It
also moves the update of cc_dst and cc_op to the helper, as it is
faster doing it here when there is already an helper.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Aurelien Jarno 2010-12-25 23:25:47 +01:00 • committed by Blue Swirl
parent 818c2e1b97
commit 0fcec41eec
3 changed files with 50 additions and 18 deletions
Download patch file Download diff file Expand all files Collapse all files

12
target-sparc/translate.c
View file

@ -3162,20 +3162,20 @@ static void disas_sparc_insn(DisasContext * dc)
#endif
case 0xe: /* udiv */
CHECK_IU_FEATURE(dc, DIV);
gen_helper_udiv(cpu_dst, cpu_src1, cpu_src2);
if (xop & 0x10) {
tcg_gen_mov_tl(cpu_cc_dst, cpu_dst);
tcg_gen_movi_i32(cpu_cc_op, CC_OP_DIV);
gen_helper_udiv_cc(cpu_dst, cpu_src1, cpu_src2);
dc->cc_op = CC_OP_DIV;
} else {
gen_helper_udiv(cpu_dst, cpu_src1, cpu_src2);
}
break;
case 0xf: /* sdiv */
CHECK_IU_FEATURE(dc, DIV);
gen_helper_sdiv(cpu_dst, cpu_src1, cpu_src2);
if (xop & 0x10) {
tcg_gen_mov_tl(cpu_cc_dst, cpu_dst);
tcg_gen_movi_i32(cpu_cc_op, CC_OP_DIV);
gen_helper_sdiv_cc(cpu_dst, cpu_src1, cpu_src2);
dc->cc_op = CC_OP_DIV;
} else {
gen_helper_sdiv(cpu_dst, cpu_src1, cpu_src2);
}
break;
default: