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used arm inline assembly in some byte swap functions

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This commit is contained in:
hyunghwan.chung 2019-05-04 02:16:25 +00:00
parent b06059bf6e
commit 80b05e9d95
3 changed files with 38 additions and 5 deletions
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4
moo/lib/bigint.c
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@ -161,7 +161,7 @@ static MOO_INLINE int get_pos_of_msb_set_pow2 (moo_oow_t x)
);
#endif
return (int)pos;
#elif defined(__GNUC__) && defined(__arm__) && (defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_8__))
#elif defined(__GNUC__) && defined(__arm__) && (defined(__ARM_ARCH) && (__ARM_ARCH >= 5))
moo_oow_t n;
/* CLZ is available in ARMv5T and above. there is no instruction to
* count trailing zeros or something similar. using RBIT with CLZ
@ -199,7 +199,7 @@ static MOO_INLINE int get_pos_of_msb_set (moo_oow_t x)
: "r"(x) /* input */
);
return (int)pos;
#elif defined(__GNUC__) && defined(__arm__) && (defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_8__))
#elif defined(__GNUC__) && defined(__arm__) && (defined(__ARM_ARCH) && (__ARM_ARCH >= 5))
moo_oow_t n;
__asm__ volatile (
"clz %0,%1\n\t"

17
moo/lib/moo-cmn.h
View File

@ -45,6 +45,11 @@
# error UNSUPPORTED SYSTEM
#endif
/* =========================================================================
* ARCHITECTURE/COMPILER TWEAKS
* ========================================================================= */
#if defined(EMSCRIPTEN)
# if defined(MOO_SIZEOF___INT128)
# undef MOO_SIZEOF___INT128
@ -57,6 +62,18 @@
# endif
#endif
#if defined(__GNUC__) && defined(__arm__) && !defined(__ARM_ARCH)
# if defined(__ARM_ARCH_8__)
# define __ARM_ARCH 8
# elif defined(__ARM_ARCH_7__)
# define __ARM_ARCH 7
# elif defined(__ARM_ARCH_6__)
# define __ARM_ARCH 6
# elif defined(__ARM_ARCH_5__)
# define __ARM_ARCH 5
# endif
#endif
/* =========================================================================
* PRIMITIVE TYPE DEFINTIONS
* ========================================================================= */

22
moo/lib/moo-utl.h
View File

@ -746,8 +746,10 @@ static MOO_INLINE moo_uint16_t moo_bswap16 (moo_uint16_t x)
#if defined(MOO_HAVE_BUILTIN_BSWAP16)
return __builtin_bswap16(x);
#elif defined(__GNUC__) && (defined(__x86_64) || defined(__amd64) || defined(__i386) || defined(i386))
__asm__ volatile ("xchgb %b0, %h0" : "=Q"(x): "0"(x));
__asm__ /*volatile*/ ("xchgb %b0, %h0" : "=Q"(x): "0"(x));
return x;
#elif defined(__GNUC__) && (defined(__ARM_ARCH) && (__ARM_ARCH >= 6))
__asm__ /*volatile*/ ("rev16 %0, %0" : "+r"(x));
#else
return (x << 8) | (x >> 8);
#endif
@ -760,7 +762,19 @@ static MOO_INLINE moo_uint32_t moo_bswap32 (moo_uint32_t x)
#if defined(MOO_HAVE_BUILTIN_BSWAP32)
return __builtin_bswap32(x);
#elif defined(__GNUC__) && (defined(__x86_64) || defined(__amd64) || defined(__i386) || defined(i386))
__asm__ volatile ("bswapl %0" : "=r"(x) : "0"(x));
__asm__ /*volatile*/ ("bswapl %0" : "=r"(x) : "0"(x));
return x;
#elif defined(__GNUC__) && (defined(__ARM_ARCH) && (__ARM_ARCH >= 6))
__asm__ /*volatile*/ ("rev32 %0, %0" : "+r"(x));
#elif defined(__GNUC__) && defined(__ARM_ARCH)
moo_uint32_t tmp;
__asm__ /*volatile*/ (
"eor %1, %0, %0, ror #16\n\t"
"bic %1, %1, #0x00ff0000\n\t"
"mov %0, %0, ror #8\n\t"
"eor %0, %0, %1, lsr #8\n\t"
:"+r"(x), "=&r"(tmp)
);
return x;
#else
return ((x >> 24)) |
@ -777,8 +791,10 @@ static MOO_INLINE moo_uint64_t moo_bswap64 (moo_uint64_t x)
#if defined(MOO_HAVE_BUILTIN_BSWAP64)
return __builtin_bswap64(x);
#elif defined(__GNUC__) && (defined(__x86_64) || defined(__amd64))
__asm__ volatile ("bswapq %0" : "=r"(x) : "0"(x));
__asm__ /*volatile*/ ("bswapq %0" : "=r"(x) : "0"(x));
return x;
#elif defined(__GNUC__) && defined(__aarch64__)
__asm__ /*volatile*/ ("rev64 %0, %0" : "+r"(x));
#else
return ((x >> 56)) |
((x >> 40) & ((moo_uint64_t)0xff << 8)) |