+/* n must be a constant to be efficient */
+static inline target_long lshift(target_long x, int n)
+{
+ if (n >= 0) {
+ return x << n;
+ } else {
+ return x >> (-n);
+ }
+}
+
+#define RC_MASK 0xc00
+#define RC_NEAR 0x000
+#define RC_DOWN 0x400
+#define RC_UP 0x800
+#define RC_CHOP 0xc00
+
+#define MAXTAN 9223372036854775808.0
+
+/* the following deal with x86 long double-precision numbers */
+#define MAXEXPD 0x7fff
+#define EXPBIAS 16383
+#define EXPD(fp) (fp.l.upper & 0x7fff)
+#define SIGND(fp) ((fp.l.upper) & 0x8000)
+#define MANTD(fp) (fp.l.lower)
+#define BIASEXPONENT(fp) fp.l.upper = (fp.l.upper & ~(0x7fff)) | EXPBIAS
+
+static inline void fpush(void)
+{
+ env->fpstt = (env->fpstt - 1) & 7;
+ env->fptags[env->fpstt] = 0; /* validate stack entry */
+}
+
+static inline void fpop(void)
+{
+ env->fptags[env->fpstt] = 1; /* invvalidate stack entry */
+ env->fpstt = (env->fpstt + 1) & 7;
+}
+
+static inline floatx80 helper_fldt(target_ulong ptr)
+{
+ CPU_LDoubleU temp;
+
+ temp.l.lower = ldq(ptr);
+ temp.l.upper = lduw(ptr + 8);
+ return temp.d;
+}
+
+static inline void helper_fstt(floatx80 f, target_ulong ptr)
+{
+ CPU_LDoubleU temp;
+
+ temp.d = f;
+ stq(ptr, temp.l.lower);
+ stw(ptr + 8, temp.l.upper);
+}
+
+#define FPUS_IE (1 << 0)
+#define FPUS_DE (1 << 1)
+#define FPUS_ZE (1 << 2)
+#define FPUS_OE (1 << 3)
+#define FPUS_UE (1 << 4)
+#define FPUS_PE (1 << 5)
+#define FPUS_SF (1 << 6)
+#define FPUS_SE (1 << 7)
+#define FPUS_B (1 << 15)
+
+#define FPUC_EM 0x3f
+
+static inline uint32_t compute_eflags(void)
+{
+ return env->eflags | helper_cc_compute_all(CC_OP) | (DF & DF_MASK);
+}
+
+/* NOTE: CC_OP must be modified manually to CC_OP_EFLAGS */
+static inline void load_eflags(int eflags, int update_mask)
+{
+ CC_SRC = eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
+ DF = 1 - (2 * ((eflags >> 10) & 1));
+ env->eflags = (env->eflags & ~update_mask) |
+ (eflags & update_mask) | 0x2;
+}
+
+/* load efer and update the corresponding hflags. XXX: do consistency
+ checks with cpuid bits ? */
+static inline void cpu_load_efer(CPUState *env, uint64_t val)
+{
+ env->efer = val;
+ env->hflags &= ~(HF_LMA_MASK | HF_SVME_MASK);
+ if (env->efer & MSR_EFER_LMA) {
+ env->hflags |= HF_LMA_MASK;
+ }
+ if (env->efer & MSR_EFER_SVME) {
+ env->hflags |= HF_SVME_MASK;
+ }
+}