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Make ANSI mode closer to being ANSI

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This commit is contained in:
Justine Tunney 2021-02-03 17:14:17 -08:00
parent 28135b7a20
commit 46085797b6
23 changed files with 352 additions and 92 deletions
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61
libc/bits/bits.h
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@ -13,17 +13,17 @@ extern const uint8_t kReverseBits[256];
uint32_t gray(uint32_t) pureconst;
uint32_t ungray(uint32_t) pureconst;
uint8_t bitreverse8(uint8_t) libcesque pureconst;
uint16_t bitreverse16(uint16_t) libcesque pureconst;
uint32_t bitreverse32(uint32_t) libcesque pureconst;
uint64_t bitreverse64(uint64_t) libcesque pureconst;
unsigned long roundup2pow(unsigned long) libcesque pureconst;
unsigned long roundup2log(unsigned long) libcesque pureconst;
unsigned long rounddown2pow(unsigned long) libcesque pureconst;
unsigned long hamming(unsigned long, unsigned long) pureconst;
intptr_t lockxchg(void *, void *, size_t);
bool cmpxchg(void *, intptr_t, intptr_t, size_t);
bool lockcmpxchg(void *, intptr_t, intptr_t, size_t);
/*───────────────────────────────────────────────────────────────────────────│─╗
│ cosmopolitan § bits » no assembly required ─╬─│┼
@ -70,38 +70,6 @@ unsigned long hamming(unsigned long, unsigned long) pureconst;
(uint64_t)((unsigned char *)(S))[6] << 010 | \
(uint64_t)((unsigned char *)(S))[7] << 000)
#define read16le(S) \
({ \
unsigned char *Str = (unsigned char *)(S); \
READ16LE(Str); \
})
#define read32le(S) \
({ \
unsigned char *Str = (unsigned char *)(S); \
READ32LE(Str); \
})
#define read64le(S) \
({ \
unsigned char *Str = (unsigned char *)(S); \
READ64LE(Str); \
})
#define read16be(S) \
({ \
unsigned char *Str = (unsigned char *)(S); \
READ16BE(Str); \
})
#define read32be(S) \
({ \
unsigned char *Str = (unsigned char *)(S); \
READ32BE(Str); \
})
#define read64be(S) \
({ \
unsigned char *Str = (unsigned char *)(S); \
READ64BE(Str); \
})
#define WRITE16LE(P, V) \
do { \
uint8_t *Ple = (uint8_t *)(P); \
@ -165,6 +133,7 @@ unsigned long hamming(unsigned long, unsigned long) pureconst;
/*───────────────────────────────────────────────────────────────────────────│─╗
│ cosmopolitan § bits » some assembly required ─╬─│┼
╚────────────────────────────────────────────────────────────────────────────│*/
#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
/*
* Constraints for virtual machine flags.
@ -271,13 +240,6 @@ unsigned long hamming(unsigned long, unsigned long) pureconst;
*(LOCALVAR); \
})
/**
* Compares and exchanges.
*
* @param IFTHING is uint𝑘_t[hasatleast 1] where 𝑘 ∈ {8,16,32,64}
* @return true if value was exchanged, otherwise false
* @see lockcmpxchg()
*/
#define cmpxchg(IFTHING, ISEQUALTOME, REPLACEITWITHME) \
({ \
bool DidIt; \
@ -291,13 +253,6 @@ unsigned long hamming(unsigned long, unsigned long) pureconst;
DidIt; \
})
/**
* Compares and exchanges w/ one operation.
*
* @param IFTHING is uint𝑘_t[hasatleast 1] where 𝑘 ∈ {8,16,32,64}
* @return true if value was exchanged, otherwise false
* @see lockcmpxchg()
*/
#define lockcmpxchg(IFTHING, ISEQUALTOME, REPLACEITWITHME) \
({ \
bool DidIt; \
@ -402,6 +357,14 @@ unsigned long hamming(unsigned long, unsigned long) pureconst;
OldBit; \
})
#else
#define cmpxchg(MEM, CMP, VAL) \
cmpxchg(MEM, (intptr_t)(CMP), (intptr_t)(VAL), sizeof(*(MEM)))
#define lockcmpxchg(MEM, CMP, VAL) \
lockcmpxchg(MEM, (intptr_t)(CMP), (intptr_t)(VAL), sizeof(*(MEM)))
#define lockxchg(MEM, VAR) \
lockxchg(MEM, VAR, sizeof(*(MEM)) / (sizeof(*(MEM)) == sizeof(*(VAR))))
#endif /* __GNUC__ && !__STRICT_ANSI__ */
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_BITS_H_ */