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424c6c8803
Synchronizes the D runtime library with upstream druntime 09ed02ce56, and fixes a rename of the importC module missed in the r15-6559 merge. PR d/119761 libphobos/ChangeLog: * libdruntime/MERGE: Merge upstream druntime 09ed02ce56. * libdruntime/Makefile.am (DRUNTIME_DISOURCES): Rename __builtins.di to __importc_builtins.di. * libdruntime/Makefile.in: Regenerate. * libdruntime/__builtins.di: Move to... * libdruntime/__importc_builtins.di: ...here. gcc/testsuite/ChangeLog: * gdc.dg/import-c/import-c.exp: New test. * gdc.dg/import-c/pr119761.d: New test. * gdc.dg/import-c/pr119761c.c: New test.
114 lines
3.5 KiB
D
114 lines
3.5 KiB
D
/* This D file is implicitly imported by all ImportC source files.
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* It provides definitions for C compiler builtin functions and declarations.
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* The purpose is to make it unnecessary to hardwire them into the compiler.
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* As the leading double underscore suggests, this is for internal use only.
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*
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* Copyright: Copyright D Language Foundation 2022-2025
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* License: $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
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* Authors: Walter Bright
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* Source: $(DRUNTIMESRC __importc_builtins.di)
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*/
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module __builtins;
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/* gcc relies on internal __builtin_xxxx functions and templates to
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* accomplish <stdarg.h>. D does the same thing with templates in core.stdc.stdarg.
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* Here, we redirect the gcc builtin declarations to the equivalent
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* ones in core.stdc.stdarg, thereby avoiding having to hardwire them
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* into the D compiler.
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*/
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alias va_list = imported!"core.stdc.stdarg".va_list;
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version (Posix)
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{
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version (X86_64)
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alias __va_list_tag = imported!"core.stdc.stdarg".__va_list_tag;
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}
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alias __builtin_va_start = imported!"core.stdc.stdarg".va_start;
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alias __builtin_va_end = imported!"core.stdc.stdarg".va_end;
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alias __builtin_va_copy = imported!"core.stdc.stdarg".va_copy;
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/* dmd's ImportC rewrites __builtin_va_arg into an instantiation of va_arg
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*/
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alias va_arg = imported!"core.stdc.stdarg".va_arg;
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version (CRuntime_Microsoft)
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{
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//https://docs.microsoft.com/en-us/cpp/cpp/int8-int16-int32-int64?view=msvc-170
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alias __int8 = byte;
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alias __int16 = short;
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alias __int32 = int;
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alias __int64 = long;
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}
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/*********** floating point *************/
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/* https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html
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*/
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version (DigitalMars)
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{
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immutable float __nan = float.nan;
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float __builtin_nanf()(char*) { return float.nan; }
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double __builtin_inf()() { return double.infinity; }
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float __builtin_inff()() { return float.infinity; }
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real __builtin_infl()() { return real.infinity; }
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alias __builtin_huge_val = __builtin_inf;
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alias __builtin_huge_valf = __builtin_inff;
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alias __builtin_huge_vall = __builtin_infl;
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alias __builtin_fabs = imported!"core.stdc.math".fabs;
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alias __builtin_fabsf = imported!"core.stdc.math".fabsf;
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alias __builtin_fabsl = imported!"core.stdc.math".fabsl;
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ushort __builtin_bswap16()(ushort value)
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{
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return cast(ushort) (((value >> 8) & 0xFF) | ((value << 8) & 0xFF00U));
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}
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uint __builtin_bswap32()(uint value)
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{
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import core.bitop;
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return core.bitop.bswap(value);
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}
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ulong __builtin_bswap64()(ulong value)
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{
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import core.bitop;
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return core.bitop.bswap(value);
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}
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uint __builtin__popcount()(ulong value)
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{
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import core.bitop;
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return core.bitop._popcnt(value);
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}
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// Lazily imported on first use
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private alias c_long = imported!"core.stdc.config".c_long;
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// Stub these out to no-ops
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int __builtin_constant_p(T)(T exp) { return 0; } // should be something like __traits(compiles, enum X = expr)
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c_long __builtin_expect()(c_long exp, c_long c) { return exp; }
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void* __builtin_assume_aligned()(const void* p, size_t align_, ...) { return cast(void*)p; }
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// https://releases.llvm.org/13.0.0/tools/clang/docs/LanguageExtensions.html#builtin-assume
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void __builtin_assume(T)(lazy T arg) { }
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/* Header on macOS for arm64 references this.
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* Don't need to implement it, it just needs to compile
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*/
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align (16) struct __uint128_t
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{
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ulong a, b;
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}
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}
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