zig/std/special/compiler_rt
Andrew Kelley 987768778a bit shifting safety
* add u3, u4, u5, u6, u7 and i3, i4, i5, i6, i7
 * shift operations shift amount parameter type is
   integer with log2 bit width of other param
   - This enforces not violating undefined behavior on
     shift amount >= bit width with the type system
 * clean up math.log, math.ln, math.log2, math.log10

closes #403
2017-08-19 01:43:43 -04:00
..
comparetf2.zig fix big integer shifting by large number 2017-08-17 22:01:19 -04:00
fixuint.zig bit shifting safety 2017-08-19 01:43:43 -04:00
fixunsdfdi_test.zig bit shifting safety 2017-08-19 01:43:43 -04:00
fixunsdfdi.zig compiler_rt implementations for __fixuns* functions 2017-08-16 19:07:35 -04:00
fixunsdfsi_test.zig compiler_rt implementations for __fixuns* functions 2017-08-16 19:07:35 -04:00
fixunsdfsi.zig compiler_rt implementations for __fixuns* functions 2017-08-16 19:07:35 -04:00
fixunsdfti_test.zig compiler_rt implementations for __fixuns* functions 2017-08-16 19:07:35 -04:00
fixunsdfti.zig compiler_rt implementations for __fixuns* functions 2017-08-16 19:07:35 -04:00
fixunssfdi_test.zig compiler_rt implementations for __fixuns* functions 2017-08-16 19:07:35 -04:00
fixunssfdi.zig compiler_rt implementations for __fixuns* functions 2017-08-16 19:07:35 -04:00
fixunssfsi_test.zig compiler_rt implementations for __fixuns* functions 2017-08-16 19:07:35 -04:00
fixunssfsi.zig compiler_rt implementations for __fixuns* functions 2017-08-16 19:07:35 -04:00
fixunssfti_test.zig compiler_rt implementations for __fixuns* functions 2017-08-16 19:07:35 -04:00
fixunssfti.zig compiler_rt implementations for __fixuns* functions 2017-08-16 19:07:35 -04:00
fixunstfdi_test.zig add compiler_rt functions for f128 2017-08-17 19:10:15 -04:00
fixunstfdi.zig compiler_rt implementations for __fixuns* functions 2017-08-16 19:07:35 -04:00
fixunstfsi_test.zig include compiler-rt tests in main testing suite 2017-08-18 13:51:16 -04:00
fixunstfsi.zig include compiler-rt tests in main testing suite 2017-08-18 13:51:16 -04:00
fixunstfti_test.zig include compiler-rt tests in main testing suite 2017-08-18 13:51:16 -04:00
fixunstfti.zig include compiler-rt tests in main testing suite 2017-08-18 13:51:16 -04:00
index.zig bit shifting safety 2017-08-19 01:43:43 -04:00
README.md add compiler-rt fns: udivmodti4, udivti3, umodti3 2017-08-18 16:26:09 -04:00
udivmod.zig bit shifting safety 2017-08-19 01:43:43 -04:00
udivmoddi4_test.zig make udivmod generic and add tests 2017-08-18 17:20:03 -04:00
udivmoddi4.zig make udivmod generic and add tests 2017-08-18 17:20:03 -04:00
udivmodti4_test.zig add compiler-rt fns: udivmodti4, udivti3, umodti3 2017-08-18 16:26:09 -04:00
udivmodti4.zig make udivmod generic and add tests 2017-08-18 17:20:03 -04:00
udivti3.zig add compiler-rt fns: udivmodti4, udivti3, umodti3 2017-08-18 16:26:09 -04:00
umodti3.zig add compiler-rt fns: udivmodti4, udivti3, umodti3 2017-08-18 16:26:09 -04:00

This compiler-rt library is ported from LLVM.

It's needed because LLVM emits library calls to compiler-rt when hardware lacks functionality, for example, 64-bit integer multiplication on 32-bit x86.

This library is automatically built as-needed for the compilation target and then statically linked and therefore is a transparent dependency for the programmer.

Any bugs should be solved by trying to duplicate the bug upstream.

  • If the bug exists upstream, get it fixed with the LLVM team and then port the fix downstream to Zig.
  • If the bug only exists in Zig, something went wrong porting the code, and you can run the C code and Zig code side by side in a debugger to figure out what's happening differently.