diff options
Diffstat (limited to 'target/s390x/cc_helper.c')
| -rw-r--r-- | target/s390x/cc_helper.c | 40 |
1 files changed, 8 insertions, 32 deletions
diff --git a/target/s390x/cc_helper.c b/target/s390x/cc_helper.c index cd2c5c4..c7728d1 100644 --- a/target/s390x/cc_helper.c +++ b/target/s390x/cc_helper.c @@ -129,6 +129,11 @@ static uint32_t cc_calc_addu(uint64_t carry_out, uint64_t result) return (result != 0) + 2 * carry_out; } +static uint32_t cc_calc_subu(uint64_t borrow_out, uint64_t result) +{ + return cc_calc_addu(borrow_out + 1, result); +} + static uint32_t cc_calc_add_64(int64_t a1, int64_t a2, int64_t ar) { if ((a1 > 0 && a2 > 0 && ar < 0) || (a1 < 0 && a2 < 0 && ar > 0)) { @@ -159,19 +164,6 @@ static uint32_t cc_calc_sub_64(int64_t a1, int64_t a2, int64_t ar) } } -static uint32_t cc_calc_subu_64(uint64_t a1, uint64_t a2, uint64_t ar) -{ - if (ar == 0) { - return 2; - } else { - if (a2 > a1) { - return 1; - } else { - return 3; - } - } -} - static uint32_t cc_calc_subb_64(uint64_t a1, uint64_t a2, uint64_t ar) { int borrow_out; @@ -245,19 +237,6 @@ static uint32_t cc_calc_sub_32(int32_t a1, int32_t a2, int32_t ar) } } -static uint32_t cc_calc_subu_32(uint32_t a1, uint32_t a2, uint32_t ar) -{ - if (ar == 0) { - return 2; - } else { - if (a2 > a1) { - return 1; - } else { - return 3; - } - } -} - static uint32_t cc_calc_subb_32(uint32_t a1, uint32_t a2, uint32_t ar) { int borrow_out; @@ -462,15 +441,15 @@ static uint32_t do_calc_cc(CPUS390XState *env, uint32_t cc_op, case CC_OP_ADDU: r = cc_calc_addu(src, dst); break; + case CC_OP_SUBU: + r = cc_calc_subu(src, dst); + break; case CC_OP_ADD_64: r = cc_calc_add_64(src, dst, vr); break; case CC_OP_SUB_64: r = cc_calc_sub_64(src, dst, vr); break; - case CC_OP_SUBU_64: - r = cc_calc_subu_64(src, dst, vr); - break; case CC_OP_SUBB_64: r = cc_calc_subb_64(src, dst, vr); break; @@ -493,9 +472,6 @@ static uint32_t do_calc_cc(CPUS390XState *env, uint32_t cc_op, case CC_OP_SUB_32: r = cc_calc_sub_32(src, dst, vr); break; - case CC_OP_SUBU_32: - r = cc_calc_subu_32(src, dst, vr); - break; case CC_OP_SUBB_32: r = cc_calc_subb_32(src, dst, vr); break; |