1 files changed, 134 insertions, 0 deletions
diff --git a/vere/ext/nasm/include/iflag.h b/vere/ext/nasm/include/iflag.h
new file mode 100644
index 0000000..31a0a98
--- /dev/null
+++ b/vere/ext/nasm/include/iflag.h
@@ -0,0 +1,134 @@
+#ifndef NASM_IFLAG_H
+#define NASM_IFLAG_H
+
+#include "compiler.h"
+#include "ilog2.h"
+
+
+#include "iflaggen.h"
+
+#define IF_GENBIT(bit)          (UINT32_C(1) << ((bit) & 31))
+
+static inline int ifcomp(uint32_t a, uint32_t b)
+{
+    return (a > b) - (a < b);
+}
+
+static inline bool iflag_test(const iflag_t *f, unsigned int bit)
+{
+    return !!(f->field[bit >> 5] & IF_GENBIT(bit));
+}
+
+static inline void iflag_set(iflag_t *f, unsigned int bit)
+{
+    f->field[bit >> 5] |= IF_GENBIT(bit);
+}
+
+static inline void iflag_clear(iflag_t *f, unsigned int bit)
+{
+    f->field[bit >> 5] &= ~IF_GENBIT(bit);
+}
+
+static inline void iflag_clear_all(iflag_t *f)
+{
+     memset(f, 0, sizeof(*f));
+}
+
+static inline void iflag_set_all(iflag_t *f)
+{
+     memset(f, ~0, sizeof(*f));
+}
+
+#define iflag_for_each_field(v) for ((v) = 0; (v) < IF_FIELD_COUNT; (v)++)
+
+static inline int iflag_cmp(const iflag_t *a, const iflag_t *b)
+{
+    int i;
+
+    /* This is intentionally a reverse loop! */
+    for (i = IF_FIELD_COUNT-1; i >= 0; i--) {
+        if (a->field[i] == b->field[i])
+            continue;
+
+        return ifcomp(a->field[i], b->field[i]);
+    }
+
+    return 0;
+}
+
+#define IF_GEN_HELPER(name, op)                                         \
+    static inline iflag_t iflag_##name(const iflag_t *a, const iflag_t *b) \
+    {                                                                   \
+        unsigned int i;                                                 \
+        iflag_t res;                                                    \
+                                                                        \
+        iflag_for_each_field(i)                                         \
+            res.field[i] = a->field[i] op b->field[i];                  \
+                                                                        \
+        return res;                                                     \
+    }
+
+IF_GEN_HELPER(xor, ^)
+
+/* Some helpers which are to work with predefined masks */
+#define IF_SMASK        (IFM_SB|IFM_SW|IFM_SD|IFM_SQ|IFM_SO|IFM_SY|IFM_SZ|IFM_SIZE|IFM_ANYSIZE)
+#define IF_ARMASK       (IFM_AR0|IFM_AR1|IFM_AR2|IFM_AR3|IFM_AR4)
+
+#define _itemp_smask(idx)      (insns_flags[(idx)].field[0] & IF_SMASK)
+#define _itemp_armask(idx)     (insns_flags[(idx)].field[0] & IF_ARMASK)
+#define _itemp_arg(idx)        ((_itemp_armask(idx) >> IF_AR0) - 1)
+
+#define itemp_smask(itemp)      _itemp_smask((itemp)->iflag_idx)
+#define itemp_arg(itemp)        _itemp_arg((itemp)->iflag_idx)
+#define itemp_armask(itemp)     _itemp_armask((itemp)->iflag_idx)
+
+/*
+ * IF_ANY is the highest CPU level by definition
+ */
+#define IF_CPU_LEVEL_MASK      ((IFM_ANY << 1) - 1)
+
+static inline int iflag_cmp_cpu(const iflag_t *a, const iflag_t *b)
+{
+    return ifcomp(a->field[IF_CPU_FIELD], b->field[IF_CPU_FIELD]);
+}
+
+static inline uint32_t _iflag_cpu_level(const iflag_t *a)
+{
+    return a->field[IF_CPU_FIELD] & IF_CPU_LEVEL_MASK;
+}
+
+static inline int iflag_cmp_cpu_level(const iflag_t *a, const iflag_t *b)
+{
+    return ifcomp(_iflag_cpu_level(a), _iflag_cpu_level(b));
+}
+
+/* Returns true if the CPU level is at least a certain value */
+static inline bool iflag_cpu_level_ok(const iflag_t *a, unsigned int bit)
+{
+    return _iflag_cpu_level(a) >= IF_GENBIT(bit);
+}
+
+static inline void iflag_set_all_features(iflag_t *a)
+{
+    uint32_t *p = &a->field[IF_FEATURE_FIELD];
+
+    memset(p, -1, IF_FEATURE_NFIELDS * sizeof(uint32_t));
+}
+
+static inline iflag_t _iflag_pfmask(const iflag_t *a)
+{
+    iflag_t r;
+
+    iflag_clear_all(&r);
+
+    if (iflag_test(a, IF_CYRIX))
+        iflag_set(&r, IF_CYRIX);
+    if (iflag_test(a, IF_AMD))
+        iflag_set(&r, IF_AMD);
+
+    return r;
+}
+
+#define iflag_pfmask(itemp)     _iflag_pfmask(&insns_flags[(itemp)->iflag_idx])
+
+#endif /* NASM_IFLAG_H */