relibc_compiler-builtins/README.md

rustc-builtins

[WIP] Porting compiler-rt intrinsics to Rust

See rust-lang/rust#35437.

Contributing

1. Pick one or more intrinsics from the [pending list][/#progress].
2. Fork this repository
3. Port the intrinsic(s) and their corresponding unit tests from their C implementation to Rust.
4. Send a Pull Request (PR)
5. Once the PR passes our extensive testing infrastructure, we'll merge it!
6. Celebrate :tada:

Progress

• absvdi2.c
• absvsi2.c
• absvti2.c
• adddf3.c
• addsf3.c
• addvdi3.c
• addvsi3.c
• addvti3.c
• arm/adddf3vfp.S
• arm/addsf3vfp.S
• arm/aeabi_cdcmp.S
• arm/aeabi_cdcmpeq_check_nan.c
• arm/aeabi_cfcmp.S
• arm/aeabi_cfcmpeq_check_nan.c
• arm/aeabi_dcmp.S
• arm/aeabi_div0.c
• arm/aeabi_drsub.c
• arm/aeabi_fcmp.S
• arm/aeabi_frsub.c
• arm/aeabi_idivmod.S
• arm/aeabi_ldivmod.S
• arm/aeabi_uidivmod.S
• arm/aeabi_uldivmod.S
• arm/bswapdi2.S
• arm/bswapsi2.S
• arm/clzdi2.S
• arm/clzsi2.S
• arm/comparesf2.S
• arm/divdf3vfp.S
• arm/divmodsi4.S
• arm/divsf3vfp.S
• arm/divsi3.S
• arm/eqdf2vfp.S
• arm/eqsf2vfp.S
• arm/extendsfdf2vfp.S
• arm/fixdfsivfp.S
• arm/fixsfsivfp.S
• arm/fixunsdfsivfp.S
• arm/fixunssfsivfp.S
• arm/floatsidfvfp.S
• arm/floatsisfvfp.S
• arm/floatunssidfvfp.S
• arm/floatunssisfvfp.S
• arm/gedf2vfp.S
• arm/gesf2vfp.S
• arm/gtdf2vfp.S
• arm/gtsf2vfp.S
• arm/ledf2vfp.S
• arm/lesf2vfp.S
• arm/ltdf2vfp.S
• arm/ltsf2vfp.S
• arm/modsi3.S
• arm/muldf3vfp.S
• arm/mulsf3vfp.S
• arm/nedf2vfp.S
• arm/negdf2vfp.S
• arm/negsf2vfp.S
• arm/nesf2vfp.S
• arm/restore_vfp_d8_d15_regs.S
• arm/save_vfp_d8_d15_regs.S
• arm/softfloat-alias.list
• arm/subdf3vfp.S
• arm/subsf3vfp.S
• arm/switch16.S
• arm/switch32.S
• arm/switch8.S
• arm/switchu8.S
• arm/truncdfsf2vfp.S
• arm/udivmodsi4.S
• arm/udivsi3.S
• arm/umodsi3.S
• arm/unorddf2vfp.S
• arm/unordsf2vfp.S
• ashldi3.c
• ashlti3.c
• ashrdi3.c
• ashrti3.c
• clzdi2.c
• clzsi2.c
• clzti2.c
• cmpdi2.c
• cmpti2.c
• comparedf2.c
• comparesf2.c
• ctzdi2.c
• ctzsi2.c
• ctzti2.c
• divdf3.c
• divdi3.c
• divmoddi4.c
• divmodsi4.c
• divsf3.c
• divsi3.c
• divti3.c
• extendhfsf2.c
• extendsfdf2.c
• ffsdi2.c
• ffsti2.c
• fixdfdi.c
• fixdfsi.c
• fixdfti.c
• fixsfdi.c
• fixsfsi.c
• fixsfti.c
• fixunsdfdi.c
• fixunsdfsi.c
• fixunsdfti.c
• fixunssfdi.c
• fixunssfsi.c
• fixunssfti.c
• floatdidf.c
• floatdisf.c
• floatsidf.c
• floatsisf.c
• floattidf.c
• floattisf.c
• floatundidf.c
• floatundisf.c
• floatunsidf.c
• floatunsisf.c
• floatuntidf.c
• floatuntisf.c
• i386/ashldi3.S
• i386/ashrdi3.S
• i386/chkstk.S
• i386/chkstk2.S
• i386/divdi3.S
• i386/floatdidf.S
• i386/floatdisf.S
• i386/floatundidf.S
• i386/floatundisf.S
• i386/lshrdi3.S
• i386/moddi3.S
• i386/muldi3.S
• i386/udivdi3.S
• i386/umoddi3.S
• lshrdi3.c
• lshrti3.c
• moddi3.c
• modsi3.c
• modti3.c
• muldf3.c
• muldi3.c
• mulodi4.c
• mulosi4.c
• muloti4.c
• mulsf3.c
• multi3.c
• mulvdi3.c
• mulvsi3.c
• mulvti3.c
• negdf2.c
• negdi2.c
• negsf2.c
• negti2.c
• negvdi2.c
• negvsi2.c
• negvti2.c
• paritydi2.c
• paritysi2.c
• parityti2.c
• popcountdi2.c
• popcountsi2.c
• popcountti2.c
• powidf2.c
• powisf2.c
• ppc/gcc_qadd.c
• ppc/gcc_qdiv.c
• ppc/gcc_qmul.c
• ppc/gcc_qsub.c
• ppc/restFP.S
• ppc/saveFP.S
• subdf3.c
• subsf3.c
• subvdi3.c
• subvsi3.c
• subvti3.c
• truncdfhf2.c
• truncdfsf2.c
• truncsfhf2.c
• ucmpdi2.c
• ucmpti2.c
• udivdi3.c
• udivmoddi4.c
• udivmodsi4.c
• udivmodti4.c
• udivsi3.c
• udivti3.c
• umoddi3.c
• umodsi3.c
• umodti3.c
• x86_64/chkstk.S
• x86_64/chkstk2.S
• x86_64/floatundidf.S
• x86_64/floatundisf.S
• arm/aeabi_memcmp.S
• arm/aeabi_memcpy.S
• arm/aeabi_memmove.S
• arm/aeabi_memset.S
• x86_64/floatdidf.c
• x86_64/floatdisf.c

Unimplemented functions

These builtins involve floating-point types ("f128", "f80" and complex numbers) that are not supported by Rust.

• addtf3.c
• comparetf2.c
• divdc3.c
• divsc3.c
• divtc3.c
• divtf3.c
• divxc3.c
• extenddftf2.c
• extendsftf2.c
• fixtfdi.c
• fixtfsi.c
• fixtfti.c
• fixunstfdi.c
• fixunstfsi.c
• fixunstfti.c
• fixunsxfdi.c
• fixunsxfsi.c
• fixunsxfti.c
• fixxfdi.c
• fixxfti.c
• floatditf.c
• floatdixf.c
• floatsitf.c
• floattixf.c
• floatunditf.c
• floatundixf.c
• floatunsitf.c
• floatuntixf.c
• i386/floatdixf.S
• i386/floatundixf.S
• muldc3.c
• mulsc3.c
• multc3.c
• multf3.c
• mulxc3.c
• powitf2.c
• powixf2.c
• ppc/divtc3.c
• ppc/fixtfdi.c
• ppc/fixunstfdi.c
• ppc/floatditf.c
• ppc/floatunditf.c
• ppc/multc3.c
• subtf3.c
• trunctfdf2.c
• trunctfsf2.c
• x86_64/floatdixf.c
• x86_64/floatundixf.S

Rust only exposes atomic types on platforms that support them, and therefore does not need to fall back to software implementations.

• arm/sync_fetch_and_add_4.S
• arm/sync_fetch_and_add_8.S
• arm/sync_fetch_and_and_4.S
• arm/sync_fetch_and_and_8.S
• arm/sync_fetch_and_max_4.S
• arm/sync_fetch_and_max_8.S
• arm/sync_fetch_and_min_4.S
• arm/sync_fetch_and_min_8.S
• arm/sync_fetch_and_nand_4.S
• arm/sync_fetch_and_nand_8.S
• arm/sync_fetch_and_or_4.S
• arm/sync_fetch_and_or_8.S
• arm/sync_fetch_and_sub_4.S
• arm/sync_fetch_and_sub_8.S
• arm/sync_fetch_and_umax_4.S
• arm/sync_fetch_and_umax_8.S
• arm/sync_fetch_and_umin_4.S
• arm/sync_fetch_and_umin_8.S
• arm/sync_fetch_and_xor_4.S
• arm/sync_fetch_and_xor_8.S
• arm/sync_synchronize.S
• atomic.c
• atomic_flag_clear.c
• atomic_flag_clear_explicit.c
• atomic_flag_test_and_set.c
• atomic_flag_test_and_set_explicit.c
• atomic_signal_fence.c
• atomic_thread_fence.c

Miscellaneous functionality that is not used by Rust.

• apple_versioning.c
• clear_cache.c
• emutls.c
• enable_execute_stack.c
• eprintf.c
• gcc_personality_v0.c
• trampoline_setup.c

License

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.