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Do not include bswap* all over the place

This commit is contained in:
Lassi Kortela 2019-08-09 22:04:55 +03:00
parent a7296eeca5
commit 2610213b42
2 changed files with 73 additions and 72 deletions
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73
c/flisp.c
View File

@ -924,6 +924,79 @@ no_kw:
return nargs; return nargs;
} }
#if defined(__amd64__) || defined(_M_AMD64)
#define ARCH_X86_64
#define __CPU__ 686
#elif defined(_M_IX86) // msvs, intel, digital mars, watcom
#if !defined(__386__)
#error "unsupported target: 16-bit x86"
#endif
#define ARCH_X86
#define __CPU__ (_M_IX86 + 86)
#elif defined(__i686__) // gnu c
#define ARCH_X86
#define __CPU__ 686
#elif defined(__i586__) // gnu c
#define ARCH_X86
#define __CPU__ 586
#elif defined(__i486__) // gnu c
#define ARCH_X86
#define __CPU__ 486
#elif defined(__i386__) // gnu c
#define ARCH_X86
#define __CPU__ 386
#else
#error "unknown architecture"
#endif
#ifdef ARCH_X86_64
#define LEGACY_REGS "=Q"
#else
#define LEGACY_REGS "=q"
#endif
#if !defined(__INTEL_COMPILER) && (defined(ARCH_X86) || defined(ARCH_X86_64))
static uint16_t ByteSwap16(uint16_t x)
{
__asm("xchgb %b0,%h0" : LEGACY_REGS(x) : "0"(x));
return x;
}
#define bswap_16(x) ByteSwap16(x)
static uint32_t ByteSwap32(uint32_t x)
{
#if __CPU__ > 386
__asm("bswap %0"
: "=r"(x)
:
#else
__asm("xchgb %b0,%h0\n"
" rorl $16,%0\n"
" xchgb %b0,%h0"
: LEGACY_REGS(x)
:
#endif
"0"(x));
return x;
}
#define bswap_32(x) ByteSwap32(x)
#else
#define bswap_16(x) (((x)&0x00ff) << 8 | ((x)&0xff00) >> 8)
#ifdef __INTEL_COMPILER
#define bswap_32(x) _bswap(x)
#else
#define bswap_32(x) \
((((x)&0xff000000) >> 24) | (((x)&0x00ff0000) >> 8) | \
(((x)&0x0000ff00) << 8) | (((x)&0x000000ff) << 24))
#endif
#endif
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
#define GET_INT32(a) \ #define GET_INT32(a) \
((int32_t)((((int32_t)a[0]) << 0) | (((int32_t)a[1]) << 8) | \ ((int32_t)((((int32_t)a[0]) << 0) | (((int32_t)a[1]) << 8) | \

72
c/utils.h
View File

@ -1,75 +1,3 @@
#if defined(__amd64__) || defined(_M_AMD64)
#define ARCH_X86_64
#define __CPU__ 686
#elif defined(_M_IX86) // msvs, intel, digital mars, watcom
#if !defined(__386__)
#error "unsupported target: 16-bit x86"
#endif
#define ARCH_X86
#define __CPU__ (_M_IX86 + 86)
#elif defined(__i686__) // gnu c
#define ARCH_X86
#define __CPU__ 686
#elif defined(__i586__) // gnu c
#define ARCH_X86
#define __CPU__ 586
#elif defined(__i486__) // gnu c
#define ARCH_X86
#define __CPU__ 486
#elif defined(__i386__) // gnu c
#define ARCH_X86
#define __CPU__ 386
#else
#error "unknown architecture"
#endif
char *uint2str(char *dest, size_t len, uint64_t num, uint32_t base); char *uint2str(char *dest, size_t len, uint64_t num, uint32_t base);
int str2int(char *str, size_t len, int64_t *res, uint32_t base); int str2int(char *str, size_t len, int64_t *res, uint32_t base);
int isdigit_base(char c, int base); int isdigit_base(char c, int base);
#ifdef ARCH_X86_64
#define LEGACY_REGS "=Q"
#else
#define LEGACY_REGS "=q"
#endif
#if !defined(__INTEL_COMPILER) && (defined(ARCH_X86) || defined(ARCH_X86_64))
static uint16_t ByteSwap16(uint16_t x)
{
__asm("xchgb %b0,%h0" : LEGACY_REGS(x) : "0"(x));
return x;
}
#define bswap_16(x) ByteSwap16(x)
static uint32_t ByteSwap32(uint32_t x)
{
#if __CPU__ > 386
__asm("bswap %0"
: "=r"(x)
:
#else
__asm("xchgb %b0,%h0\n"
" rorl $16,%0\n"
" xchgb %b0,%h0"
: LEGACY_REGS(x)
:
#endif
"0"(x));
return x;
}
#define bswap_32(x) ByteSwap32(x)
#else
#define bswap_16(x) (((x)&0x00ff) << 8 | ((x)&0xff00) >> 8)
#ifdef __INTEL_COMPILER
#define bswap_32(x) _bswap(x)
#else
#define bswap_32(x) \
((((x)&0xff000000) >> 24) | (((x)&0x00ff0000) >> 8) | \
(((x)&0x0000ff00) << 8) | (((x)&0x000000ff) << 24))
#endif
#endif