| 1 | /* 386/builtin.h (emx+gcc) */
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| 2 |
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| 3 | #ifndef _I386_BUILTIN_H
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| 4 | #define _I386_BUILTIN_H
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| 5 |
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| 6 | #if defined (__cplusplus)
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| 7 | extern "C" {
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| 8 | #endif
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| 9 |
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| 10 | static __inline__ signed char __cxchg (__volatile__ signed char *p,
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| 11 | signed char v)
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| 12 | {
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| 13 | __asm__ __volatile__ ("xchgb %0, %1" : "=m"(*p), "=r"(v) : "1"(v));
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| 14 | return v;
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| 15 | }
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| 16 |
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| 17 | static __inline__ short __sxchg (__volatile__ short *p, short v)
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| 18 | {
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| 19 | __asm__ __volatile__ ("xchgw %0, %1" : "=m"(*p), "=r"(v) : "1"(v));
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| 20 | return v;
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| 21 | }
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| 22 |
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| 23 | static __inline__ int __lxchg (__volatile__ int *p, int v)
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| 24 | {
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| 25 | __asm__ __volatile__ ("xchgl %0, %1" : "=m"(*p), "=r"(v) : "1"(v));
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| 26 | return v;
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| 27 | }
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| 28 |
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| 29 | static __inline__ void __enable (void)
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| 30 | {
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| 31 | __asm__ __volatile__ ("sti");
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| 32 | }
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| 33 |
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| 34 | static __inline__ void __disable (void)
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| 35 | {
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| 36 | __asm__ __volatile__ ("cli");
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| 37 | }
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| 38 |
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| 39 | #define __ROTATE_FUN(F,I,T) \
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| 40 | static __inline__ T F (T value, int shift) \
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| 41 | { \
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| 42 | __asm__ (I " %b2, %0" : "=g"(value) : "0"(value), "c"(shift) : "cc"); \
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| 43 | return value; \
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| 44 | } \
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| 45 | static __inline__ T F##1 (T value) \
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| 46 | { \
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| 47 | __asm__ (I " $1, %0" : "=g"(value) : "0"(value) : "cc"); \
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| 48 | return value; \
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| 49 | }
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| 50 |
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| 51 | #define __ROTATE(V,S,F) ((__builtin_constant_p (S) && (int)(S) == 1) \
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| 52 | ? F##1 (V) : F (V, S))
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| 53 |
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| 54 | __ROTATE_FUN (__crotr, "rorb", unsigned char)
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| 55 | __ROTATE_FUN (__srotr, "rorw", unsigned short)
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| 56 | __ROTATE_FUN (__lrotr, "rorl", unsigned long)
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| 57 |
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| 58 | __ROTATE_FUN (__crotl, "rolb", unsigned char)
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| 59 | __ROTATE_FUN (__srotl, "rolw", unsigned short)
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| 60 | __ROTATE_FUN (__lrotl, "roll", unsigned long)
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| 61 |
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| 62 | #define _crotr(V,S) __ROTATE (V, S, __crotr)
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| 63 | #define _srotr(V,S) __ROTATE (V, S, __srotr)
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| 64 | #define _lrotr(V,S) __ROTATE (V, S, __lrotr)
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| 65 | #define _crotl(V,S) __ROTATE (V, S, __crotl)
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| 66 | #define _srotl(V,S) __ROTATE (V, S, __srotl)
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| 67 | #define _lrotl(V,S) __ROTATE (V, S, __lrotl)
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| 68 |
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| 69 | #define _rotr(V,S) _lrotr (V, S)
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| 70 | #define _rotl(V,S) _lrotl (V, S)
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| 71 |
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| 72 |
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| 73 | static __inline__ int __fls (int v)
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| 74 | {
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| 75 | int r;
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| 76 |
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| 77 | __asm__ __volatile__ ("bsrl %1, %0;"
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| 78 | "jnz 1f;"
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| 79 | "movl $-1, %0;"
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| 80 | ".align 2, 0x90;"
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| 81 | "1:"
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| 82 | : "=r"(r) : "r"(v) : "cc");
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| 83 | return r + 1;
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| 84 | }
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| 85 |
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| 86 | #if defined (__cplusplus)
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| 87 | }
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| 88 | #endif
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| 89 |
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| 90 | #endif /* not _I386_BUILTIN_H */
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