diff options
| author | Richard Henderson <rth@twiddle.net> | 2013-02-19 23:52:13 -0800 |
|---|---|---|
| committer | Blue Swirl <blauwirbel@gmail.com> | 2013-02-23 17:25:30 +0000 |
| commit | da91a00f191fc70ea7d81d7476ef933c562e6fcd (patch) | |
| tree | c91ad3000fe069119379b11d9281e978b296fbbe /target-ppc/int_helper.c | |
| parent | 23ad1d5d3c00cd07ab7aedc128565c6029802c30 (diff) | |
| download | qemu-da91a00f191fc70ea7d81d7476ef933c562e6fcd.tar.gz | |
target-ppc: Split out SO, OV, CA fields from XER
In preparation for more efficient setting of these fields.
Cc: Alexander Graf <agraf@suse.de>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Diffstat (limited to 'target-ppc/int_helper.c')
| -rw-r--r-- | target-ppc/int_helper.c | 38 |
1 files changed, 15 insertions, 23 deletions
diff --git a/target-ppc/int_helper.c b/target-ppc/int_helper.c index 86531517fc..54eca9bbee 100644 --- a/target-ppc/int_helper.c +++ b/target-ppc/int_helper.c @@ -33,9 +33,9 @@ uint64_t helper_mulldo(CPUPPCState *env, uint64_t arg1, uint64_t arg2) muls64(&tl, (uint64_t *)&th, arg1, arg2); /* If th != 0 && th != -1, then we had an overflow */ if (likely((uint64_t)(th + 1) <= 1)) { - env->xer &= ~(1 << XER_OV); + env->ov = 0; } else { - env->xer |= (1 << XER_OV) | (1 << XER_SO); + env->so = env->ov = 1; } return (int64_t)tl; } @@ -64,21 +64,17 @@ target_ulong helper_sraw(CPUPPCState *env, target_ulong value, shift &= 0x1f; ret = (int32_t)value >> shift; if (likely(ret >= 0 || (value & ((1 << shift) - 1)) == 0)) { - env->xer &= ~(1 << XER_CA); + env->ca = 0; } else { - env->xer |= (1 << XER_CA); + env->ca = 1; } } else { ret = (int32_t)value; - env->xer &= ~(1 << XER_CA); + env->ca = 0; } } else { ret = (int32_t)value >> 31; - if (ret) { - env->xer |= (1 << XER_CA); - } else { - env->xer &= ~(1 << XER_CA); - } + env->ca = (ret != 0); } return (target_long)ret; } @@ -94,21 +90,17 @@ target_ulong helper_srad(CPUPPCState *env, target_ulong value, shift &= 0x3f; ret = (int64_t)value >> shift; if (likely(ret >= 0 || (value & ((1 << shift) - 1)) == 0)) { - env->xer &= ~(1 << XER_CA); + env->ca = 0; } else { - env->xer |= (1 << XER_CA); + env->ca = 1; } } else { ret = (int64_t)value; - env->xer &= ~(1 << XER_CA); + env->ca = 0; } } else { ret = (int64_t)value >> 63; - if (ret) { - env->xer |= (1 << XER_CA); - } else { - env->xer &= ~(1 << XER_CA); - } + env->ca = (ret != 0); } return ret; } @@ -188,16 +180,16 @@ target_ulong helper_divo(CPUPPCState *env, target_ulong arg1, if (((int32_t)tmp == INT32_MIN && (int32_t)arg2 == (int32_t)-1) || (int32_t)arg2 == 0) { - env->xer |= (1 << XER_OV) | (1 << XER_SO); + env->so = env->ov = 1; env->spr[SPR_MQ] = 0; return INT32_MIN; } else { env->spr[SPR_MQ] = tmp % arg2; tmp /= (int32_t)arg2; if ((int32_t)tmp != tmp) { - env->xer |= (1 << XER_OV) | (1 << XER_SO); + env->so = env->ov = 1; } else { - env->xer &= ~(1 << XER_OV); + env->ov = 0; } return tmp; } @@ -221,11 +213,11 @@ target_ulong helper_divso(CPUPPCState *env, target_ulong arg1, { if (((int32_t)arg1 == INT32_MIN && (int32_t)arg2 == (int32_t)-1) || (int32_t)arg2 == 0) { - env->xer |= (1 << XER_OV) | (1 << XER_SO); + env->so = env->ov = 1; env->spr[SPR_MQ] = 0; return INT32_MIN; } else { - env->xer &= ~(1 << XER_OV); + env->ov = 0; env->spr[SPR_MQ] = (int32_t)arg1 % (int32_t)arg2; return (int32_t)arg1 / (int32_t)arg2; } |