1 ============================================== 2 libbcc Compiler Runtime Function Documentation 3 ============================================== 4 5 Integer Arithmetic Routines 6 --------------------------- 7 8 *Arithmetic Functions*:: 9 10 __ashldi3 : long (long a, int b) // a << b [[llvm]] 11 __ashrdi3 : long (long a, int b) // a / 2**b (i.e. arithmetic a >> b) [[llvm]] 12 __divdi3 : long (long a, long b) // a / b [[llvm]] 13 __lshrdi3 : long (long a, int b) // a >> b (without sign extension) [[llvm]] 14 __moddi3 : long (long a, long b) // a % b [[llvm]] 15 __muldi3 : long (long a, long b) // a * b [[llvm]] 16 __muldsi3 : long (int a, int b) // (long)a * (long)b [[llvm compiler-rt extension]] [[llvm]] 17 __negdi2 : long (long a) // -a [[llvm]] 18 __udivsi3 : unsigned int (unsigned int a, unsigned int b) // unsigned int a / b [[llvm]] 19 __udivdi3 : unsigned long (unsigned long a, unsigned long a) // unsigned long a / b [[llvm]] 20 __udivmoddi4 : unsigned long (unsigned long a, unsigned long b, unsigned long *rem) // unsigned long a/b and a%b [[llvm]] 21 __umoddi3 : unsigned long (unsigned long a, unsigned long b) // unsigned long a % b [[llvm]] 22 23 *Comparison functions*:: 24 25 __cmpdi2 : int (long a, long b) // Signed comparison of a and b. (if a < b then return 0. if a == b then return 1. if a > b then return 2.) [[llvm]] 26 __ucmpdi2 : int (unsigned long a, unsigned long a) // Unsigned comparison of a and b. (if a < b then return 0. if a == b then return 1. if a > b then return 2.) [[llvm]] 27 28 *Trapping arithmetic functions*:: 29 30 __absvsi2 : int (int a) // |a| [[llvm]] 31 __absvdi2 : long (long a) // |a| [[llvm]] 32 __addvsi3 : int (int a, int b) // a + b [[llvm]] 33 __addvdi3 : long (long a, long b) // a + b [[llvm]] 34 __mulvsi3 : int (int a, int b) // a * b [[llvm]] 35 __mulvdi3 : long (long a, long b) // a * b [[llvm]] 36 __negvsi2 : int (int a) // -a [[llvm]] 37 __negvdi2 : long (long a) // -a [[llvm]] 38 __subvsi3 : int (int a, int b) // a - b [[llvm]] 39 __subvdi3 : long (long a, long b) // a - b [[llvm]] 40 41 *Bit operations*:: 42 43 __clzsi2 : int (int a) // number of leading 0-bits in a from MSB [[llvm]] 44 __clzdi2 : int (long a) // number of leading 0-bits in a from MSB [[llvm]] 45 __ctzsi2 : int (int a) // number of trailing 0-bits in a from LSB [[llvm]] 46 __ctzdi2 : int (long a) // number of trailing 0-bits in a from LSB [[llvm]] 47 __ffsdi2 : int (long a) // index of the least significant 1-bit [[llvm]] 48 __paritysi2 : int (int a) // parity (if number of 1-bits is even, then return 0) [[llvm]] 49 __paritydi2 : int (long a) // parity (if number of 1-bits is even, then return 0) [[llvm]] 50 __popcountsi2 : int (int a) // number of 1-bits [[llvm]] 51 __popcountdi2 : int (long a) // number of 1-bits [[llvm]] 52 __bswapsi2 : uint32_t (uint32_t) // reverse the byte order [[generic]] 53 __bswapdi2 : uint64_t (uint64_t) // reverse the byte order [[generic]] 54 55 Floating Point Emulation Routines 56 --------------------------------- 57 58 *Arithmetic functions*:: 59 60 __addsf3 : float (float a, float b) // a + b [[vfp]] [[generic]] 61 __adddf3 : double (double a, double b) // a + b [[vfp]] [[generic]] 62 __subsf3 : float (float a, float b) // a - b [[vfp]] [[generic]] 63 __subdf3 : double (double a, double b) // a - b [[vfp]] [[generic]] 64 __mulsf3 : float (float a, float b) // a * b [[vfp]] [[generic]] 65 __muldf3 : double (double a, double b) // a * b [[vfp]] [[generic]] 66 __divsf3 : float (float a, float b) // a / b [[vfp]] [[generic]] 67 __divdf3 : double (double a, double b) // a / b [[vfp]] [[generic]] 68 __negsf2 : float (float a) // -a [[vfp]] [[generic]] 69 __negdf2 : double (double a) // -a [[vfp]] [[generic]] 70 71 *Conversion functions*:: 72 73 __extendsfdf2 : double (float a) // (double)a [[vfp]] [[generic]] 74 __truncdfsf2 : float (double a) // (float)a [[vfp]] [[generic]] 75 __fixsfsi : int (float a) // (int)a, rounding toward 0 [[vfp]] [[generic]] 76 __fixdfsi : int (double a) // (int)a, rounding toward 0 [[vfp]] [[generic]] 77 __fixsfdi : long (float a) // (long)a, rounding toward 0 [[llvm]] 78 __fixdfdi : long (double a) // (long)a, rounding toward 0 [[llvm]] 79 __fixunssfsi : unsigned int (float a) // (unsigned int)a, rounding toward 0, negative number will be 0. [[vfp]] [[llvm]] 80 __fixunsdfsi : unsigned int (double a) // (unsigned int)a, rounding toward 0, negative number will be 0. [[vfp]] [[llvm]] 81 __fixunssfdi : unsigned long (float a) // (unsigned long)a, rounding toward 0, negative number will be 0. [[llvm]] 82 __fixunsdfdi : unsigned long (double a) // (unsigned long)a, rounding toward 0, negative number will be 0. [[llvm]] 83 __floatsisf : float (int i) // (float)i [[vfp]] [[generic]] 84 __floatsidf : double (int i) // (double)i [[vfp]] [[generic]] 85 __floatdisf : float (long i) // (float) i [[llvm]] 86 __floatdidf : double (long i) // (double)i [[llvm]] 87 __floatunsisf : float (unsigned int i) // (float)i [[generic]] 88 __floatunsidf : double (unsigned int i) // (double)i [[generic]] 89 __floatunssisfvfp : float (unsigned int i) // (float)i [[llvm compiler-rt extension]] [[vfp]] 90 __floatunssidfvfp : double (unsigned int i) // (double)i [[llvm compiler-rt extension]] [[vfp]] 91 __floatundisf : float (unsigned long i) // (float)i [[llvm]] 92 __floatundidf : double (unsigned long i) // (double)i [[llvm]] 93 __unordsf2 : int (float a, float b) // if a == NaN or b == NaN, then return non-zero. [[vfp]] [[generic]] 94 __unorddf2 : int (double a, double b) // if a == NaN or b == NaN, then return non-zero. [[vfp]] [[generic]] 95 __eqsf2 : int (float a, float b) // a != b (i.e. return 0 when a == b) (note: NaN != NaN) [[vfp]] [[generic]] 96 __eqdf2 : int (double a, double b) // a != b (i.e. return 0 when a == b) (note: NaN != NaN) [[vfp]] [[generic]] 97 __nesf2 : int (float a, float b) // a != b || a == NaN || b == NaN [[vfp]] 98 __nedf2 : int (double a, double b) // a != b || a == NaN || b == NaN [[vfp]] 99 __gesf2 : int (float a, float b) // (a >= b) ? nonnegative_value : negative_value [[vfp]] [[generic]] 100 __gedf2 : int (double a, double b) // (a >= b) ? nonnegative_value : negative_value [[vfp]] [[generic]] 101 __ltsf2 : int (float a, float b) // (a < b) ? negative_value : nonnegative_value [[vfp]] 102 __ltdf2 : int (double a, double b) // (a < b) ? negative_value : nonnegative_value [[vfp]] 103 __lesf2 : int (float a, float b) // (a <= b) ? nonpositive_value : positive_value [[vfp]] [[generic]] 104 __ledf2 : int (double a, double b) // (a <= b) ? nonpositive_value : positive_value [[vfp]] [[generic]] 105 __gtsf2 : int (float a, float b) // (a > b) ? positive_value : nonpositive_value [[vfp]] 106 __gtdf2 : int (double a, double b) // (a > b) ? positive_value : nonpositive_value [[vfp]] 107 108 *Other floating-point functions*:: 109 110 __powisf2 : float (float a, int b) // a**b [[llvm]] 111 __powidf2 : double (double a, int b) // a**b [[llvm]] 112 __mulsc3 : complex_float (float a, float b, float c, float d) // (a+bi) * (c+di) [[llvm]] 113 __muldc3 : complex_double (double a, double b, double c, double d) // (a+bi) * (c+di) [[llvm]] 114 __divsc3 : complex_float (float a, float b, float c, float d) // (a+bi) / (c+di) [[llvm]] 115 __divdc3 : complex_double (double a, double b, double c, double d) // (a+bi) / (c+di) [[llvm]] 116 117 118 119 Miscellaneous Routines 120 ---------------------- 121 122 :: 123 124 __eprintf : void (char const *, char const *, char const *, char const *) // fprintf for assertions [[llvm compiler-rt extension]] [[llvm]] 125
