eval: Use nasm_error helpers
[nasm.git] / include / iflag.h
blob5280703eb89a7a99a87d9d6282b43bfd414b48e1
1 #ifndef NASM_IFLAG_H
2 #define NASM_IFLAG_H
4 #include "compiler.h"
5 #include "ilog2.h"
7 #include <string.h>
9 #include "iflaggen.h"
11 #define IF_GENBIT(bit) (UINT32_C(1) << (bit))
13 static inline bool iflag_test(const iflag_t *f, unsigned int bit)
15 return !!(f->field[bit >> 5] & IF_GENBIT(bit & 31));
18 static inline void iflag_set(iflag_t *f, unsigned int bit)
20 f->field[bit >> 5] |= IF_GENBIT(bit & 31);
23 static inline void iflag_clear(iflag_t *f, unsigned int bit)
25 f->field[bit >> 5] &= ~IF_GENBIT(bit & 31);
28 static inline void iflag_clear_all(iflag_t *f)
30 memset(f, 0, sizeof(*f));
33 static inline void iflag_set_all(iflag_t *f)
35 memset(f, ~0, sizeof(*f));
38 #define iflag_for_each_field(v) for ((v) = 0; (v) < IF_FIELD_COUNT; (v)++)
40 static inline int iflag_cmp(const iflag_t *a, const iflag_t *b)
42 int i;
44 /* This is intentionally a reverse loop! */
45 for (i = IF_FIELD_COUNT-1; i >= 0; i--) {
46 if (a->field[i] == b->field[i])
47 continue;
49 return (int)(a->field[i] - b->field[i]);
52 return 0;
55 #define IF_GEN_HELPER(name, op) \
56 static inline iflag_t iflag_##name(const iflag_t *a, const iflag_t *b) \
57 { \
58 unsigned int i; \
59 iflag_t res; \
61 iflag_for_each_field(i) \
62 res.field[i] = a->field[i] op b->field[i]; \
64 return res; \
67 IF_GEN_HELPER(xor, ^)
69 /* Some helpers which are to work with predefined masks */
70 #define IF_SMASK \
71 (IF_GENBIT(IF_SB) |\
72 IF_GENBIT(IF_SW) |\
73 IF_GENBIT(IF_SD) |\
74 IF_GENBIT(IF_SQ) |\
75 IF_GENBIT(IF_SO) |\
76 IF_GENBIT(IF_SY) |\
77 IF_GENBIT(IF_SZ) |\
78 IF_GENBIT(IF_SIZE))
79 #define IF_ARMASK \
80 (IF_GENBIT(IF_AR0) |\
81 IF_GENBIT(IF_AR1) |\
82 IF_GENBIT(IF_AR2) |\
83 IF_GENBIT(IF_AR3) |\
84 IF_GENBIT(IF_AR4))
86 #define _itemp_smask(idx) (insns_flags[(idx)].field[0] & IF_SMASK)
87 #define _itemp_armask(idx) (insns_flags[(idx)].field[0] & IF_ARMASK)
88 #define _itemp_arg(idx) ((_itemp_armask(idx) >> IF_AR0) - 1)
90 #define itemp_smask(itemp) _itemp_smask((itemp)->iflag_idx)
91 #define itemp_arg(itemp) _itemp_arg((itemp)->iflag_idx)
92 #define itemp_armask(itemp) _itemp_armask((itemp)->iflag_idx)
95 * IF_8086 is the first CPU level flag and IF_PLEVEL the last
97 #if IF_8086 & 31
98 #error "IF_8086 must be on a uint32_t boundary"
99 #endif
100 #define IF_PLEVEL IF_IA64
101 #define IF_CPU_FIELD (IF_8086 >> 5)
102 #define IF_CPU_LEVEL_MASK ((IF_GENBIT(IF_PLEVEL & 31) << 1) - 1)
105 * IF_PRIV is the firstr instruction filtering flag
107 #if IF_PRIV & 31
108 #error "IF_PRIV must be on a uint32_t boundary"
109 #endif
110 #define IF_FEATURE_FIELD (IF_PRIV >> 5)
112 static inline int iflag_cmp_cpu(const iflag_t *a, const iflag_t *b)
114 return (int)(a->field[IF_CPU_FIELD] - b->field[IF_CPU_FIELD]);
117 static inline uint32_t _iflag_cpu_level(const iflag_t *a)
119 return a->field[IF_CPU_FIELD] & IF_CPU_LEVEL_MASK;
122 static inline int iflag_cmp_cpu_level(const iflag_t *a, const iflag_t *b)
124 uint32_t aa = _iflag_cpu_level(a);
125 uint32_t bb = _iflag_cpu_level(b);
127 return (int)(aa - bb);
130 /* Returns true if the CPU level is at least a certain value */
131 static inline bool iflag_cpu_level_ok(const iflag_t *a, unsigned int bit)
133 return _iflag_cpu_level(a) >= IF_GENBIT(bit & 31);
136 static inline void iflag_set_all_features(iflag_t *a)
138 size_t i;
140 for (i = IF_FEATURE_FIELD; i < IF_CPU_FIELD; i++)
141 a->field[i] = ~UINT32_C(0);
144 static inline void iflag_set_cpu(iflag_t *a, unsigned int cpu)
146 a->field[0] = 0; /* Not applicable to the CPU type */
147 iflag_set_all_features(a); /* All feature masking bits set for now */
148 a->field[IF_CPU_FIELD] &= ~IF_CPU_LEVEL_MASK;
149 iflag_set(a, cpu);
152 static inline void iflag_set_default_cpu(iflag_t *a)
154 iflag_set_cpu(a, IF_PLEVEL);
157 static inline iflag_t _iflag_pfmask(const iflag_t *a)
159 iflag_t r;
161 iflag_clear_all(&r);
163 if (iflag_test(a, IF_CYRIX))
164 iflag_set(&r, IF_CYRIX);
165 if (iflag_test(a, IF_AMD))
166 iflag_set(&r, IF_AMD);
168 return r;
171 #define iflag_pfmask(itemp) _iflag_pfmask(&insns_flags[(itemp)->iflag_idx])
173 #endif /* NASM_IFLAG_H */