diff options
Diffstat (limited to 'src/javascript/jsc/api/FFI.h')
| -rw-r--r-- | src/javascript/jsc/api/FFI.h | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/src/javascript/jsc/api/FFI.h b/src/javascript/jsc/api/FFI.h index 399448cae..498a36d4a 100644 --- a/src/javascript/jsc/api/FFI.h +++ b/src/javascript/jsc/api/FFI.h @@ -9,7 +9,6 @@ #ifdef IS_CALLBACK #define INJECT_BEFORE int c = 500; // This is a callback, so we need to inject code before the call #endif - #define IS_BIG_ENDIAN 0 #define USE_JSVALUE64 1 #define USE_JSVALUE32_64 0 @@ -38,7 +37,38 @@ typedef _Bool bool; #endif // #include <tcclib.h> +// x64 +#ifdef NEEDS_COMPILER_RT_FUNCTIONS + +double __floatundidf(unsigned long a); + +double __floatundidf(unsigned long a) +{ + static const double twop52 = 0x1.0p52; + static const double twop84 = 0x1.0p84; + static const double twop84_plus_twop52 = 0x1.00000001p84; + + union { uint64_t x; double d; } high = { .d = twop84 }; + union { uint64_t x; double d; } low = { .d = twop52 }; + + high.x |= a >> 32; + low.x |= a & 0x00000000ffffffff; + + const double result = (high.d - twop84_plus_twop52) + low.d; + return result; +} + +uint64_t __fixunsdfdi(double a); + +uint64_t __fixunsdfdi(double a) +{ + if (a <= 0.0) return 0; + unsigned high = a/0x1p32f; + unsigned low = a - (double)high*0x1p32f; + return ((unsigned long long)high << 32) | low; +} +#endif NEEDS_COMPILER_RT_FUNCTIONS // This value is 2^49, used to encode doubles such that the encoded value will // begin with a 15-bit pattern within the range 0x0002..0xFFFC. |