NameDateSize

..23-Dec-201923

aarch64/10-Mar-20204

absvdi2.c23-Dec-2019815

absvsi2.c23-Dec-2019807

absvti2.c23-Dec-2019864

adddf3.c10-Mar-2020859

addsf3.c10-Mar-2020853

addtf3.c10-Mar-2020730

addvdi3.c23-Dec-2019819

addvsi3.c23-Dec-2019819

addvti3.c23-Dec-2019868

apple_versioning.c23-Dec-201913.1 KiB

arm/10-Mar-202096

ashldi3.c23-Dec-20191.2 KiB

ashlti3.c23-Dec-20191.2 KiB

ashrdi3.c23-Dec-20191.3 KiB

ashrti3.c23-Dec-20191.2 KiB

assembly.h23-Dec-20197.1 KiB

atomic.c10-Mar-202016.8 KiB

atomic_flag_clear.c23-Dec-2019791

atomic_flag_clear_explicit.c23-Dec-2019859

atomic_flag_test_and_set.c23-Dec-2019823

atomic_flag_test_and_set_explicit.c23-Dec-2019898

atomic_signal_fence.c23-Dec-2019761

atomic_thread_fence.c23-Dec-2019761

bswapdi2.c23-Dec-2019958

bswapsi2.c23-Dec-2019743

clear_cache.c10-Mar-20205.6 KiB

clzdi2.c23-Dec-20191.3 KiB

clzsi2.c23-Dec-20191.5 KiB

clzti2.c23-Dec-2019887

cmpdi2.c23-Dec-20191.1 KiB

cmpti2.c23-Dec-2019974

comparedf2.c23-Dec-20194.3 KiB

comparesf2.c23-Dec-20194.3 KiB

comparetf2.c23-Dec-20193.8 KiB

cpu_model.c10-Mar-202021.1 KiB

ctzdi2.c23-Dec-20191.3 KiB

ctzsi2.c23-Dec-20191.6 KiB

ctzti2.c23-Dec-2019887

divdc3.c23-Dec-20192.2 KiB

divdf3.c23-Dec-20197.6 KiB

divdi3.c23-Dec-20191.1 KiB

divmoddi4.c23-Dec-2019712

divmodsi4.c23-Dec-2019715

divsc3.c23-Dec-20192.1 KiB

divsf3.c23-Dec-20197 KiB

divsi3.c23-Dec-20191.3 KiB

divtc3.c23-Dec-20192.2 KiB

divtf3.c10-Mar-20208 KiB

divti3.c23-Dec-20191.2 KiB

divxc3.c23-Dec-20192.2 KiB

emutls.c10-Mar-202012.4 KiB

enable_execute_stack.c23-Dec-20192.1 KiB

eprintf.c23-Dec-2019953

extenddftf2.c10-Mar-2020623

extendhfsf2.c23-Dec-2019946

extendsfdf2.c23-Dec-2019716

extendsftf2.c10-Mar-2020622

ffsdi2.c23-Dec-2019919

ffssi2.c23-Dec-2019787

ffsti2.c23-Dec-2019972

fixdfdi.c23-Dec-20191.2 KiB

fixdfsi.c23-Dec-2019755

fixdfti.c23-Dec-2019633

fixsfdi.c23-Dec-20191.2 KiB

fixsfsi.c23-Dec-2019755

fixsfti.c23-Dec-2019633

fixtfdi.c23-Dec-2019624

fixtfsi.c23-Dec-2019624

fixtfti.c23-Dec-2019624

fixunsdfdi.c23-Dec-20191.3 KiB

fixunsdfsi.c23-Dec-2019743

fixunsdfti.c23-Dec-2019611

fixunssfdi.c23-Dec-20191.3 KiB

fixunssfsi.c23-Dec-2019896

fixunssfti.c23-Dec-2019731

fixunstfdi.c23-Dec-2019604

fixunstfsi.c23-Dec-2019604

fixunstfti.c23-Dec-2019604

fixunsxfdi.c10-Mar-20201.6 KiB

fixunsxfsi.c10-Mar-20201.6 KiB

fixunsxfti.c23-Dec-20191.4 KiB

fixxfdi.c10-Mar-20201.8 KiB

fixxfti.c23-Dec-20191.5 KiB

floatdidf.c23-Dec-20193.4 KiB

floatdisf.c23-Dec-20192.5 KiB

floatditf.c23-Dec-20191.5 KiB

floatdixf.c23-Dec-20191.4 KiB

floatsidf.c23-Dec-20191.7 KiB

floatsisf.c23-Dec-20191.9 KiB

floatsitf.c23-Dec-20191.5 KiB

floattidf.c23-Dec-20192.5 KiB

floattisf.c23-Dec-20192.3 KiB

floattitf.c23-Dec-20192.7 KiB

floattixf.c23-Dec-20192.5 KiB

floatundidf.c23-Dec-20193.4 KiB

floatundisf.c23-Dec-20192.4 KiB

floatunditf.c23-Dec-20191.3 KiB

floatundixf.c23-Dec-20191.2 KiB

floatunsidf.c23-Dec-20191.5 KiB

floatunsisf.c23-Dec-20191.7 KiB

floatunsitf.c23-Dec-20191.3 KiB

floatuntidf.c23-Dec-20192.4 KiB

floatuntisf.c23-Dec-20192.2 KiB

floatuntitf.c23-Dec-20192.6 KiB

floatuntixf.c23-Dec-20192.4 KiB

fp_add_impl.inc10-Mar-20205.4 KiB

fp_extend.h23-Dec-20192.4 KiB

fp_extend_impl.inc23-Dec-20194.5 KiB

fp_fixint_impl.inc23-Dec-20191.5 KiB

fp_fixuint_impl.inc23-Dec-20191.4 KiB

fp_lib.h10-Mar-202010.1 KiB

fp_mode.c10-Mar-2020812

fp_mode.h10-Mar-2020816

fp_mul_impl.inc23-Dec-20194.4 KiB

fp_trunc.h23-Dec-20192 KiB

fp_trunc_impl.inc10-Mar-20205.6 KiB

gcc_personality_v0.c23-Dec-20198.3 KiB

hexagon/23-Dec-201932

i386/10-Mar-202019

int_endianness.h23-Dec-20192.8 KiB

int_lib.h23-Dec-20195.2 KiB

int_math.h23-Dec-20193.6 KiB

int_types.h23-Dec-20193.7 KiB

int_util.c23-Dec-20192 KiB

int_util.h23-Dec-20191.3 KiB

lshrdi3.c23-Dec-20191.2 KiB

lshrti3.c23-Dec-20191.2 KiB

mingw_fixfloat.c23-Dec-20191.3 KiB

moddi3.c23-Dec-20191,004

modsi3.c23-Dec-2019649

modti3.c23-Dec-20191 KiB

muldc3.c23-Dec-20192.1 KiB

muldf3.c23-Dec-2019918

muldi3.c23-Dec-20191.5 KiB

mulodi4.c23-Dec-20191.3 KiB

mulosi4.c23-Dec-20191.3 KiB

muloti4.c23-Dec-20191.4 KiB

mulsc3.c23-Dec-20192.1 KiB

mulsf3.c23-Dec-2019918

multc3.c23-Dec-20192 KiB

multf3.c23-Dec-2019799

multi3.c23-Dec-20191.5 KiB

mulvdi3.c23-Dec-20191.3 KiB

mulvsi3.c23-Dec-20191.3 KiB

mulvti3.c23-Dec-20191.3 KiB

mulxc3.c23-Dec-20192.2 KiB

negdf2.c23-Dec-2019832

negdi2.c23-Dec-2019719

negsf2.c23-Dec-2019832

negti2.c23-Dec-2019768

negvdi2.c23-Dec-2019768

negvsi2.c23-Dec-2019768

negvti2.c23-Dec-2019817

os_version_check.c23-Dec-20198.1 KiB

paritydi2.c23-Dec-2019715

paritysi2.c23-Dec-2019754

parityti2.c23-Dec-2019764

popcountdi2.c23-Dec-20191.3 KiB

popcountsi2.c23-Dec-20191.1 KiB

popcountti2.c23-Dec-20191.7 KiB

powidf2.c23-Dec-2019789

powisf2.c23-Dec-2019786

powitf2.c23-Dec-2019827

powixf2.c23-Dec-2019828

ppc/10-Mar-202018

README.txt23-Dec-201914.7 KiB

riscv/28-Jun-20205

sparc64/23-Dec-20198

subdf3.c10-Mar-2020917

subsf3.c10-Mar-2020917

subtf3.c10-Mar-2020825

subvdi3.c23-Dec-2019819

subvsi3.c23-Dec-2019819

subvti3.c23-Dec-2019868

trampoline_setup.c23-Dec-20191.8 KiB

truncdfhf2.c23-Dec-2019715

truncdfsf2.c23-Dec-2019711

truncsfhf2.c23-Dec-2019940

trunctfdf2.c23-Dec-2019625

trunctfsf2.c23-Dec-2019624

ucmpdi2.c23-Dec-20191.1 KiB

ucmpti2.c23-Dec-2019978

udivdi3.c23-Dec-2019650

udivmoddi4.c10-Mar-20205.5 KiB

udivmodsi4.c23-Dec-2019715

udivmodti4.c23-Dec-20195.3 KiB

udivsi3.c23-Dec-20191.7 KiB

udivti3.c23-Dec-2019699

umoddi3.c23-Dec-2019668

umodsi3.c23-Dec-2019652

umodti3.c23-Dec-2019717

unwind-ehabi-helpers.h23-Dec-20191.9 KiB

x86_64/23-Dec-201910

README.txt

1Compiler-RT
2================================
3
4This directory and its subdirectories contain source code for the compiler
5support routines.
6
7Compiler-RT is open source software. You may freely distribute it under the
8terms of the license agreement found in LICENSE.txt.
9
10================================
11
12This is a replacement library for libgcc.  Each function is contained
13in its own file.  Each function has a corresponding unit test under
14test/Unit.
15
16A rudimentary script to test each file is in the file called
17test/Unit/test.
18
19Here is the specification for this library:
20
21http://gcc.gnu.org/onlinedocs/gccint/Libgcc.html#Libgcc
22
23Here is a synopsis of the contents of this library:
24
25typedef      int si_int;
26typedef unsigned su_int;
27
28typedef          long long di_int;
29typedef unsigned long long du_int;
30
31// Integral bit manipulation
32
33di_int __ashldi3(di_int a, si_int b);      // a << b
34ti_int __ashlti3(ti_int a, si_int b);      // a << b
35
36di_int __ashrdi3(di_int a, si_int b);      // a >> b  arithmetic (sign fill)
37ti_int __ashrti3(ti_int a, si_int b);      // a >> b  arithmetic (sign fill)
38di_int __lshrdi3(di_int a, si_int b);      // a >> b  logical    (zero fill)
39ti_int __lshrti3(ti_int a, si_int b);      // a >> b  logical    (zero fill)
40
41si_int __clzsi2(si_int a);  // count leading zeros
42si_int __clzdi2(di_int a);  // count leading zeros
43si_int __clzti2(ti_int a);  // count leading zeros
44si_int __ctzsi2(si_int a);  // count trailing zeros
45si_int __ctzdi2(di_int a);  // count trailing zeros
46si_int __ctzti2(ti_int a);  // count trailing zeros
47
48si_int __ffssi2(si_int a);  // find least significant 1 bit
49si_int __ffsdi2(di_int a);  // find least significant 1 bit
50si_int __ffsti2(ti_int a);  // find least significant 1 bit
51
52si_int __paritysi2(si_int a);  // bit parity
53si_int __paritydi2(di_int a);  // bit parity
54si_int __parityti2(ti_int a);  // bit parity
55
56si_int __popcountsi2(si_int a);  // bit population
57si_int __popcountdi2(di_int a);  // bit population
58si_int __popcountti2(ti_int a);  // bit population
59
60uint32_t __bswapsi2(uint32_t a);   // a byteswapped
61uint64_t __bswapdi2(uint64_t a);   // a byteswapped
62
63// Integral arithmetic
64
65di_int __negdi2    (di_int a);                         // -a
66ti_int __negti2    (ti_int a);                         // -a
67di_int __muldi3    (di_int a, di_int b);               // a * b
68ti_int __multi3    (ti_int a, ti_int b);               // a * b
69si_int __divsi3    (si_int a, si_int b);               // a / b   signed
70di_int __divdi3    (di_int a, di_int b);               // a / b   signed
71ti_int __divti3    (ti_int a, ti_int b);               // a / b   signed
72su_int __udivsi3   (su_int n, su_int d);               // a / b   unsigned
73du_int __udivdi3   (du_int a, du_int b);               // a / b   unsigned
74tu_int __udivti3   (tu_int a, tu_int b);               // a / b   unsigned
75si_int __modsi3    (si_int a, si_int b);               // a % b   signed
76di_int __moddi3    (di_int a, di_int b);               // a % b   signed
77ti_int __modti3    (ti_int a, ti_int b);               // a % b   signed
78su_int __umodsi3   (su_int a, su_int b);               // a % b   unsigned
79du_int __umoddi3   (du_int a, du_int b);               // a % b   unsigned
80tu_int __umodti3   (tu_int a, tu_int b);               // a % b   unsigned
81du_int __udivmoddi4(du_int a, du_int b, du_int* rem);  // a / b, *rem = a % b  unsigned
82tu_int __udivmodti4(tu_int a, tu_int b, tu_int* rem);  // a / b, *rem = a % b  unsigned
83su_int __udivmodsi4(su_int a, su_int b, su_int* rem);  // a / b, *rem = a % b  unsigned
84si_int __divmodsi4(si_int a, si_int b, si_int* rem);   // a / b, *rem = a % b  signed
85
86
87
88//  Integral arithmetic with trapping overflow
89
90si_int __absvsi2(si_int a);           // abs(a)
91di_int __absvdi2(di_int a);           // abs(a)
92ti_int __absvti2(ti_int a);           // abs(a)
93
94si_int __negvsi2(si_int a);           // -a
95di_int __negvdi2(di_int a);           // -a
96ti_int __negvti2(ti_int a);           // -a
97
98si_int __addvsi3(si_int a, si_int b);  // a + b
99di_int __addvdi3(di_int a, di_int b);  // a + b
100ti_int __addvti3(ti_int a, ti_int b);  // a + b
101
102si_int __subvsi3(si_int a, si_int b);  // a - b
103di_int __subvdi3(di_int a, di_int b);  // a - b
104ti_int __subvti3(ti_int a, ti_int b);  // a - b
105
106si_int __mulvsi3(si_int a, si_int b);  // a * b
107di_int __mulvdi3(di_int a, di_int b);  // a * b
108ti_int __mulvti3(ti_int a, ti_int b);  // a * b
109
110
111// Integral arithmetic which returns if overflow
112
113si_int __mulosi4(si_int a, si_int b, int* overflow);  // a * b, overflow set to one if result not in signed range
114di_int __mulodi4(di_int a, di_int b, int* overflow);  // a * b, overflow set to one if result not in signed range
115ti_int __muloti4(ti_int a, ti_int b, int* overflow);  // a * b, overflow set to
116 one if result not in signed range
117
118
119//  Integral comparison: a  < b -> 0
120//                       a == b -> 1
121//                       a  > b -> 2
122
123si_int __cmpdi2 (di_int a, di_int b);
124si_int __cmpti2 (ti_int a, ti_int b);
125si_int __ucmpdi2(du_int a, du_int b);
126si_int __ucmpti2(tu_int a, tu_int b);
127
128//  Integral / floating point conversion
129
130di_int __fixsfdi(      float a);
131di_int __fixdfdi(     double a);
132di_int __fixxfdi(long double a);
133
134ti_int __fixsfti(      float a);
135ti_int __fixdfti(     double a);
136ti_int __fixxfti(long double a);
137uint64_t __fixtfdi(long double input);  // ppc only, doesn't match documentation
138
139su_int __fixunssfsi(      float a);
140su_int __fixunsdfsi(     double a);
141su_int __fixunsxfsi(long double a);
142
143du_int __fixunssfdi(      float a);
144du_int __fixunsdfdi(     double a);
145du_int __fixunsxfdi(long double a);
146
147tu_int __fixunssfti(      float a);
148tu_int __fixunsdfti(     double a);
149tu_int __fixunsxfti(long double a);
150uint64_t __fixunstfdi(long double input);  // ppc only
151
152float       __floatdisf(di_int a);
153double      __floatdidf(di_int a);
154long double __floatdixf(di_int a);
155long double __floatditf(int64_t a);        // ppc only
156
157float       __floattisf(ti_int a);
158double      __floattidf(ti_int a);
159long double __floattixf(ti_int a);
160
161float       __floatundisf(du_int a);
162double      __floatundidf(du_int a);
163long double __floatundixf(du_int a);
164long double __floatunditf(uint64_t a);     // ppc only
165
166float       __floatuntisf(tu_int a);
167double      __floatuntidf(tu_int a);
168long double __floatuntixf(tu_int a);
169
170//  Floating point raised to integer power
171
172float       __powisf2(      float a, si_int b);  // a ^ b
173double      __powidf2(     double a, si_int b);  // a ^ b
174long double __powixf2(long double a, si_int b);  // a ^ b
175long double __powitf2(long double a, si_int b);  // ppc only, a ^ b
176
177//  Complex arithmetic
178
179//  (a + ib) * (c + id)
180
181      float _Complex __mulsc3( float a,  float b,  float c,  float d);
182     double _Complex __muldc3(double a, double b, double c, double d);
183long double _Complex __mulxc3(long double a, long double b,
184                              long double c, long double d);
185long double _Complex __multc3(long double a, long double b,
186                              long double c, long double d); // ppc only
187
188//  (a + ib) / (c + id)
189
190      float _Complex __divsc3( float a,  float b,  float c,  float d);
191     double _Complex __divdc3(double a, double b, double c, double d);
192long double _Complex __divxc3(long double a, long double b,
193                              long double c, long double d);
194long double _Complex __divtc3(long double a, long double b,
195                              long double c, long double d);  // ppc only
196
197
198//         Runtime support
199
200// __clear_cache() is used to tell process that new instructions have been
201// written to an address range.  Necessary on processors that do not have
202// a unified instruction and data cache.
203void __clear_cache(void* start, void* end);
204
205// __enable_execute_stack() is used with nested functions when a trampoline
206// function is written onto the stack and that page range needs to be made
207// executable.
208void __enable_execute_stack(void* addr);
209
210// __gcc_personality_v0() is normally only called by the system unwinder.
211// C code (as opposed to C++) normally does not need a personality function
212// because there are no catch clauses or destructors to be run.  But there
213// is a C language extension __attribute__((cleanup(func))) which marks local
214// variables as needing the cleanup function "func" to be run when the
215// variable goes out of scope.  That includes when an exception is thrown,
216// so a personality handler is needed.  
217_Unwind_Reason_Code __gcc_personality_v0(int version, _Unwind_Action actions,
218         uint64_t exceptionClass, struct _Unwind_Exception* exceptionObject,
219         _Unwind_Context_t context);
220
221// for use with some implementations of assert() in <assert.h>
222void __eprintf(const char* format, const char* assertion_expression,
223				const char* line, const char* file);
224
225// for systems with emulated thread local storage
226void* __emutls_get_address(struct __emutls_control*);
227
228
229//   Power PC specific functions
230
231// There is no C interface to the saveFP/restFP functions.  They are helper
232// functions called by the prolog and epilog of functions that need to save
233// a number of non-volatile float point registers.  
234saveFP
235restFP
236
237// PowerPC has a standard template for trampoline functions.  This function
238// generates a custom trampoline function with the specific realFunc
239// and localsPtr values.
240void __trampoline_setup(uint32_t* trampOnStack, int trampSizeAllocated, 
241                                const void* realFunc, void* localsPtr);
242
243// adds two 128-bit double-double precision values ( x + y )
244long double __gcc_qadd(long double x, long double y);  
245
246// subtracts two 128-bit double-double precision values ( x - y )
247long double __gcc_qsub(long double x, long double y); 
248
249// multiples two 128-bit double-double precision values ( x * y )
250long double __gcc_qmul(long double x, long double y);  
251
252// divides two 128-bit double-double precision values ( x / y )
253long double __gcc_qdiv(long double a, long double b);  
254
255
256//    ARM specific functions
257
258// There is no C interface to the switch* functions.  These helper functions
259// are only needed by Thumb1 code for efficient switch table generation.
260switch16
261switch32
262switch8
263switchu8
264
265// There is no C interface to the *_vfp_d8_d15_regs functions.  There are
266// called in the prolog and epilog of Thumb1 functions.  When the C++ ABI use
267// SJLJ for exceptions, each function with a catch clause or destuctors needs
268// to save and restore all registers in it prolog and epliog.  But there is 
269// no way to access vector and high float registers from thumb1 code, so the 
270// compiler must add call outs to these helper functions in the prolog and 
271// epilog.
272restore_vfp_d8_d15_regs
273save_vfp_d8_d15_regs
274
275
276// Note: long ago ARM processors did not have floating point hardware support.
277// Floating point was done in software and floating point parameters were 
278// passed in integer registers.  When hardware support was added for floating
279// point, new *vfp functions were added to do the same operations but with 
280// floating point parameters in floating point registers.
281
282// Undocumented functions
283
284float  __addsf3vfp(float a, float b);   // Appears to return a + b
285double __adddf3vfp(double a, double b); // Appears to return a + b
286float  __divsf3vfp(float a, float b);   // Appears to return a / b
287double __divdf3vfp(double a, double b); // Appears to return a / b
288int    __eqsf2vfp(float a, float b);    // Appears to return  one
289                                        //     iff a == b and neither is NaN.
290int    __eqdf2vfp(double a, double b);  // Appears to return  one
291                                        //     iff a == b and neither is NaN.
292double __extendsfdf2vfp(float a);       // Appears to convert from
293                                        //     float to double.
294int    __fixdfsivfp(double a);          // Appears to convert from
295                                        //     double to int.
296int    __fixsfsivfp(float a);           // Appears to convert from
297                                        //     float to int.
298unsigned int __fixunssfsivfp(float a);  // Appears to convert from
299                                        //     float to unsigned int.
300unsigned int __fixunsdfsivfp(double a); // Appears to convert from
301                                        //     double to unsigned int.
302double __floatsidfvfp(int a);           // Appears to convert from
303                                        //     int to double.
304float __floatsisfvfp(int a);            // Appears to convert from
305                                        //     int to float.
306double __floatunssidfvfp(unsigned int a); // Appears to convert from
307                                        //     unisgned int to double.
308float __floatunssisfvfp(unsigned int a); // Appears to convert from
309                                        //     unisgned int to float.
310int __gedf2vfp(double a, double b);     // Appears to return __gedf2
311                                        //     (a >= b)
312int __gesf2vfp(float a, float b);       // Appears to return __gesf2
313                                        //     (a >= b)
314int __gtdf2vfp(double a, double b);     // Appears to return __gtdf2
315                                        //     (a > b)
316int __gtsf2vfp(float a, float b);       // Appears to return __gtsf2
317                                        //     (a > b)
318int __ledf2vfp(double a, double b);     // Appears to return __ledf2
319                                        //     (a <= b)
320int __lesf2vfp(float a, float b);       // Appears to return __lesf2
321                                        //     (a <= b)
322int __ltdf2vfp(double a, double b);     // Appears to return __ltdf2
323                                        //     (a < b)
324int __ltsf2vfp(float a, float b);       // Appears to return __ltsf2
325                                        //     (a < b)
326double __muldf3vfp(double a, double b); // Appears to return a * b
327float __mulsf3vfp(float a, float b);    // Appears to return a * b
328int __nedf2vfp(double a, double b);     // Appears to return __nedf2
329                                        //     (a != b)
330double __negdf2vfp(double a);           // Appears to return -a
331float __negsf2vfp(float a);             // Appears to return -a
332float __negsf2vfp(float a);             // Appears to return -a
333double __subdf3vfp(double a, double b); // Appears to return a - b
334float __subsf3vfp(float a, float b);    // Appears to return a - b
335float __truncdfsf2vfp(double a);        // Appears to convert from
336                                        //     double to float.
337int __unorddf2vfp(double a, double b);  // Appears to return __unorddf2
338int __unordsf2vfp(float a, float b);    // Appears to return __unordsf2
339
340
341Preconditions are listed for each function at the definition when there are any.
342Any preconditions reflect the specification at
343http://gcc.gnu.org/onlinedocs/gccint/Libgcc.html#Libgcc.
344
345Assumptions are listed in "int_lib.h", and in individual files.  Where possible
346assumptions are checked at compile time.
347