[rtems commit] compiler-rt/lib/builtins: New
Sebastian Huber
sebh at rtems.org
Tue Nov 21 13:37:58 UTC 2023
Module: rtems
Branch: qual-98
Commit: 42c9cdf35f6aa27f41d20b9b170d6e4e83a76913
Changeset: http://git.rtems.org/rtems/commit/?id=42c9cdf35f6aa27f41d20b9b170d6e4e83a76913
Author: Sebastian Huber <sebastian.huber at embedded-brains.de>
Date: Fri Sep 29 19:16:26 2023 +0200
compiler-rt/lib/builtins: New
---
LICENSE.LLVM | 279 +++++++++++++++++++++++
cpukit/compiler-rt/lib/builtins/bswapdi2.c | 25 ++
cpukit/compiler-rt/lib/builtins/bswapsi2.c | 20 ++
cpukit/compiler-rt/lib/builtins/clzdi2.c | 35 +++
cpukit/compiler-rt/lib/builtins/clzsi2.c | 48 ++++
cpukit/compiler-rt/lib/builtins/ctzdi2.c | 35 +++
cpukit/compiler-rt/lib/builtins/ctzsi2.c | 53 +++++
cpukit/compiler-rt/lib/builtins/divdi3.c | 22 ++
cpukit/compiler-rt/lib/builtins/ffsdi2.c | 27 +++
cpukit/compiler-rt/lib/builtins/ffssi2.c | 23 ++
cpukit/compiler-rt/lib/builtins/int_div_impl.inc | 95 ++++++++
cpukit/compiler-rt/lib/builtins/int_endianness.h | 114 +++++++++
cpukit/compiler-rt/lib/builtins/int_lib.h | 171 ++++++++++++++
cpukit/compiler-rt/lib/builtins/int_types.h | 198 ++++++++++++++++
cpukit/compiler-rt/lib/builtins/int_util.h | 47 ++++
cpukit/compiler-rt/lib/builtins/moddi3.c | 22 ++
cpukit/compiler-rt/lib/builtins/paritydi2.c | 25 ++
cpukit/compiler-rt/lib/builtins/paritysi2.c | 23 ++
cpukit/compiler-rt/lib/builtins/popcountdi2.c | 32 +++
cpukit/compiler-rt/lib/builtins/popcountsi2.c | 29 +++
cpukit/compiler-rt/lib/builtins/udivdi3.c | 23 ++
cpukit/compiler-rt/lib/builtins/udivmoddi4.c | 200 ++++++++++++++++
cpukit/compiler-rt/lib/builtins/umoddi3.c | 23 ++
cpukit/doxygen/top-level-groups.h | 184 +++++++++++++++
spec/build/bsps/optldflags.yml | 2 +-
spec/build/cpukit/objqual.yml | 17 ++
26 files changed, 1771 insertions(+), 1 deletion(-)
diff --git a/LICENSE.LLVM b/LICENSE.LLVM
new file mode 100644
index 0000000000..fa6ac54000
--- /dev/null
+++ b/LICENSE.LLVM
@@ -0,0 +1,279 @@
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diff --git a/cpukit/compiler-rt/lib/builtins/bswapdi2.c b/cpukit/compiler-rt/lib/builtins/bswapdi2.c
new file mode 100644
index 0000000000..cd049f58e3
--- /dev/null
+++ b/cpukit/compiler-rt/lib/builtins/bswapdi2.c
@@ -0,0 +1,25 @@
+//===-- bswapdi2.c - Implement __bswapdi2 ---------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __bswapdi2 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+
+COMPILER_RT_ABI uint64_t __bswapdi2(uint64_t u) {
+ return (
+ (((u)&0xff00000000000000ULL) >> 56) |
+ (((u)&0x00ff000000000000ULL) >> 40) |
+ (((u)&0x0000ff0000000000ULL) >> 24) |
+ (((u)&0x000000ff00000000ULL) >> 8) |
+ (((u)&0x00000000ff000000ULL) << 8) |
+ (((u)&0x0000000000ff0000ULL) << 24) |
+ (((u)&0x000000000000ff00ULL) << 40) |
+ (((u)&0x00000000000000ffULL) << 56));
+}
diff --git a/cpukit/compiler-rt/lib/builtins/bswapsi2.c b/cpukit/compiler-rt/lib/builtins/bswapsi2.c
new file mode 100644
index 0000000000..ec566d61a2
--- /dev/null
+++ b/cpukit/compiler-rt/lib/builtins/bswapsi2.c
@@ -0,0 +1,20 @@
+//===-- bswapsi2.c - Implement __bswapsi2 ---------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __bswapsi2 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+
+COMPILER_RT_ABI uint32_t __bswapsi2(uint32_t u) {
+ return ((((u)&0xff000000) >> 24) |
+ (((u)&0x00ff0000) >> 8) |
+ (((u)&0x0000ff00) << 8) |
+ (((u)&0x000000ff) << 24));
+}
diff --git a/cpukit/compiler-rt/lib/builtins/clzdi2.c b/cpukit/compiler-rt/lib/builtins/clzdi2.c
new file mode 100644
index 0000000000..12c17982a5
--- /dev/null
+++ b/cpukit/compiler-rt/lib/builtins/clzdi2.c
@@ -0,0 +1,35 @@
+//===-- clzdi2.c - Implement __clzdi2 -------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __clzdi2 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+
+// Returns: the number of leading 0-bits
+
+#if !defined(__clang__) && \
+ ((defined(__sparc__) && defined(__arch64__)) || defined(__mips64) || \
+ (defined(__riscv) && __SIZEOF_POINTER__ >= 8))
+// On 64-bit architectures with neither a native clz instruction nor a native
+// ctz instruction, gcc resolves __builtin_clz to __clzdi2 rather than
+// __clzsi2, leading to infinite recursion.
+#define __builtin_clz(a) __clzsi2(a)
+extern int __clzsi2(si_int);
+#endif
+
+// Precondition: a != 0
+
+COMPILER_RT_ABI int __clzdi2(di_int a) {
+ dwords x;
+ x.all = a;
+ const si_int f = -(x.s.high == 0);
+ return clzsi((x.s.high & ~f) | (x.s.low & f)) +
+ (f & ((si_int)(sizeof(si_int) * CHAR_BIT)));
+}
diff --git a/cpukit/compiler-rt/lib/builtins/clzsi2.c b/cpukit/compiler-rt/lib/builtins/clzsi2.c
new file mode 100644
index 0000000000..d75f56d937
--- /dev/null
+++ b/cpukit/compiler-rt/lib/builtins/clzsi2.c
@@ -0,0 +1,48 @@
+//===-- clzsi2.c - Implement __clzsi2 -------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __clzsi2 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+
+// Returns: the number of leading 0-bits
+
+// Precondition: a != 0
+
+COMPILER_RT_ABI int __clzsi2(si_int a) {
+ su_int x = (su_int)a;
+ si_int t = ((x & 0xFFFF0000) == 0) << 4; // if (x is small) t = 16 else 0
+ x >>= 16 - t; // x = [0 - 0xFFFF]
+ su_int r = t; // r = [0, 16]
+ // return r + clz(x)
+ t = ((x & 0xFF00) == 0) << 3;
+ x >>= 8 - t; // x = [0 - 0xFF]
+ r += t; // r = [0, 8, 16, 24]
+ // return r + clz(x)
+ t = ((x & 0xF0) == 0) << 2;
+ x >>= 4 - t; // x = [0 - 0xF]
+ r += t; // r = [0, 4, 8, 12, 16, 20, 24, 28]
+ // return r + clz(x)
+ t = ((x & 0xC) == 0) << 1;
+ x >>= 2 - t; // x = [0 - 3]
+ r += t; // r = [0 - 30] and is even
+ // return r + clz(x)
+ // switch (x)
+ // {
+ // case 0:
+ // return r + 2;
+ // case 1:
+ // return r + 1;
+ // case 2:
+ // case 3:
+ // return r;
+ // }
+ return r + ((2 - x) & -((x & 2) == 0));
+}
diff --git a/cpukit/compiler-rt/lib/builtins/ctzdi2.c b/cpukit/compiler-rt/lib/builtins/ctzdi2.c
new file mode 100644
index 0000000000..26c908d876
--- /dev/null
+++ b/cpukit/compiler-rt/lib/builtins/ctzdi2.c
@@ -0,0 +1,35 @@
+//===-- ctzdi2.c - Implement __ctzdi2 -------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __ctzdi2 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+
+// Returns: the number of trailing 0-bits
+
+#if !defined(__clang__) && \
+ ((defined(__sparc__) && defined(__arch64__)) || defined(__mips64) || \
+ (defined(__riscv) && __SIZEOF_POINTER__ >= 8))
+// On 64-bit architectures with neither a native clz instruction nor a native
+// ctz instruction, gcc resolves __builtin_ctz to __ctzdi2 rather than
+// __ctzsi2, leading to infinite recursion.
+#define __builtin_ctz(a) __ctzsi2(a)
+extern int __ctzsi2(si_int);
+#endif
+
+// Precondition: a != 0
+
+COMPILER_RT_ABI int __ctzdi2(di_int a) {
+ dwords x;
+ x.all = a;
+ const si_int f = -(x.s.low == 0);
+ return ctzsi((x.s.high & f) | (x.s.low & ~f)) +
+ (f & ((si_int)(sizeof(si_int) * CHAR_BIT)));
+}
diff --git a/cpukit/compiler-rt/lib/builtins/ctzsi2.c b/cpukit/compiler-rt/lib/builtins/ctzsi2.c
new file mode 100644
index 0000000000..ed95c60579
--- /dev/null
+++ b/cpukit/compiler-rt/lib/builtins/ctzsi2.c
@@ -0,0 +1,53 @@
+//===-- ctzsi2.c - Implement __ctzsi2 -------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __ctzsi2 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+
+// Returns: the number of trailing 0-bits
+
+// Precondition: a != 0
+
+COMPILER_RT_ABI int __ctzsi2(si_int a) {
+ su_int x = (su_int)a;
+ si_int t = ((x & 0x0000FFFF) == 0)
+ << 4; // if (x has no small bits) t = 16 else 0
+ x >>= t; // x = [0 - 0xFFFF] + higher garbage bits
+ su_int r = t; // r = [0, 16]
+ // return r + ctz(x)
+ t = ((x & 0x00FF) == 0) << 3;
+ x >>= t; // x = [0 - 0xFF] + higher garbage bits
+ r += t; // r = [0, 8, 16, 24]
+ // return r + ctz(x)
+ t = ((x & 0x0F) == 0) << 2;
+ x >>= t; // x = [0 - 0xF] + higher garbage bits
+ r += t; // r = [0, 4, 8, 12, 16, 20, 24, 28]
+ // return r + ctz(x)
+ t = ((x & 0x3) == 0) << 1;
+ x >>= t;
+ x &= 3; // x = [0 - 3]
+ r += t; // r = [0 - 30] and is even
+ // return r + ctz(x)
+
+ // The branch-less return statement below is equivalent
+ // to the following switch statement:
+ // switch (x)
+ // {
+ // case 0:
+ // return r + 2;
+ // case 2:
+ // return r + 1;
+ // case 1:
+ // case 3:
+ // return r;
+ // }
+ return r + ((2 - (x >> 1)) & -((x & 1) == 0));
+}
diff --git a/cpukit/compiler-rt/lib/builtins/divdi3.c b/cpukit/compiler-rt/lib/builtins/divdi3.c
new file mode 100644
index 0000000000..d71e138d99
--- /dev/null
+++ b/cpukit/compiler-rt/lib/builtins/divdi3.c
@@ -0,0 +1,22 @@
+//===-- divdi3.c - Implement __divdi3 -------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __divdi3 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+
+// Returns: a / b
+
+#define fixint_t di_int
+#define fixuint_t du_int
+#define COMPUTE_UDIV(a, b) __udivmoddi4((a), (b), (du_int *)0)
+#include "int_div_impl.inc"
+
+COMPILER_RT_ABI di_int __divdi3(di_int a, di_int b) { return __divXi3(a, b); }
diff --git a/cpukit/compiler-rt/lib/builtins/ffsdi2.c b/cpukit/compiler-rt/lib/builtins/ffsdi2.c
new file mode 100644
index 0000000000..beae553043
--- /dev/null
+++ b/cpukit/compiler-rt/lib/builtins/ffsdi2.c
@@ -0,0 +1,27 @@
+//===-- ffsdi2.c - Implement __ffsdi2 -------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __ffsdi2 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+
+// Returns: the index of the least significant 1-bit in a, or
+// the value zero if a is zero. The least significant bit is index one.
+
+COMPILER_RT_ABI int __ffsdi2(di_int a) {
+ dwords x;
+ x.all = a;
+ if (x.s.low == 0) {
+ if (x.s.high == 0)
+ return 0;
+ return ctzsi(x.s.high) + (1 + sizeof(si_int) * CHAR_BIT);
+ }
+ return ctzsi(x.s.low) + 1;
+}
diff --git a/cpukit/compiler-rt/lib/builtins/ffssi2.c b/cpukit/compiler-rt/lib/builtins/ffssi2.c
new file mode 100644
index 0000000000..ddb52927f8
--- /dev/null
+++ b/cpukit/compiler-rt/lib/builtins/ffssi2.c
@@ -0,0 +1,23 @@
+//===-- ffssi2.c - Implement __ffssi2 -------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __ffssi2 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+
+// Returns: the index of the least significant 1-bit in a, or
+// the value zero if a is zero. The least significant bit is index one.
+
+COMPILER_RT_ABI int __ffssi2(si_int a) {
+ if (a == 0) {
+ return 0;
+ }
+ return ctzsi(a) + 1;
+}
diff --git a/cpukit/compiler-rt/lib/builtins/int_div_impl.inc b/cpukit/compiler-rt/lib/builtins/int_div_impl.inc
new file mode 100644
index 0000000000..dc1f97cbea
--- /dev/null
+++ b/cpukit/compiler-rt/lib/builtins/int_div_impl.inc
@@ -0,0 +1,95 @@
+//===-- int_div_impl.inc - Integer division ---------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// Helpers used by __udivsi3, __umodsi3, __udivdi3, and __umodsi3.
+//
+//===----------------------------------------------------------------------===//
+
+#define clz(a) (sizeof(a) == sizeof(unsigned long long) ? __builtin_clzll(a) : clzsi(a))
+
+// Adapted from Figure 3-40 of The PowerPC Compiler Writer's Guide
+static __inline fixuint_t __udivXi3(fixuint_t n, fixuint_t d) {
+ const unsigned N = sizeof(fixuint_t) * CHAR_BIT;
+ // d == 0 cases are unspecified.
+ unsigned sr = (d ? clz(d) : N) - (n ? clz(n) : N);
+ // 0 <= sr <= N - 1 or sr is very large.
+ if (sr > N - 1) // n < d
+ return 0;
+ if (sr == N - 1) // d == 1
+ return n;
+ ++sr;
+ // 1 <= sr <= N - 1. Shifts do not trigger UB.
+ fixuint_t r = n >> sr;
+ n <<= N - sr;
+ fixuint_t carry = 0;
+ for (; sr > 0; --sr) {
+ r = (r << 1) | (n >> (N - 1));
+ n = (n << 1) | carry;
+ // Branch-less version of:
+ // carry = 0;
+ // if (r >= d) r -= d, carry = 1;
+ const fixint_t s = (fixint_t)(d - r - 1) >> (N - 1);
+ carry = s & 1;
+ r -= d & s;
+ }
+ n = (n << 1) | carry;
+ return n;
+}
+
+// Mostly identical to __udivXi3 but the return values are different.
+static __inline fixuint_t __umodXi3(fixuint_t n, fixuint_t d) {
+ const unsigned N = sizeof(fixuint_t) * CHAR_BIT;
+ // d == 0 cases are unspecified.
+ unsigned sr = (d ? clz(d) : N) - (n ? clz(n) : N);
+ // 0 <= sr <= N - 1 or sr is very large.
+ if (sr > N - 1) // n < d
+ return n;
+ if (sr == N - 1) // d == 1
+ return 0;
+ ++sr;
+ // 1 <= sr <= N - 1. Shifts do not trigger UB.
+ fixuint_t r = n >> sr;
+ n <<= N - sr;
+ fixuint_t carry = 0;
+ for (; sr > 0; --sr) {
+ r = (r << 1) | (n >> (N - 1));
+ n = (n << 1) | carry;
+ // Branch-less version of:
+ // carry = 0;
+ // if (r >= d) r -= d, carry = 1;
+ const fixint_t s = (fixint_t)(d - r - 1) >> (N - 1);
+ carry = s & 1;
+ r -= d & s;
+ }
+ return r;
+}
+
+#ifdef COMPUTE_UDIV
+static __inline fixint_t __divXi3(fixint_t a, fixint_t b) {
+ const int N = (int)(sizeof(fixint_t) * CHAR_BIT) - 1;
+ fixint_t s_a = a >> N; // s_a = a < 0 ? -1 : 0
+ fixint_t s_b = b >> N; // s_b = b < 0 ? -1 : 0
+ fixuint_t a_u = (fixuint_t)(a ^ s_a) + (-s_a); // negate if s_a == -1
+ fixuint_t b_u = (fixuint_t)(b ^ s_b) + (-s_b); // negate if s_b == -1
+ s_a ^= s_b; // sign of quotient
+ return (COMPUTE_UDIV(a_u, b_u) ^ s_a) + (-s_a); // negate if s_a == -1
+}
+#endif // COMPUTE_UDIV
+
+#ifdef ASSIGN_UMOD
+static __inline fixint_t __modXi3(fixint_t a, fixint_t b) {
+ const int N = (int)(sizeof(fixint_t) * CHAR_BIT) - 1;
+ fixint_t s = b >> N; // s = b < 0 ? -1 : 0
+ fixuint_t b_u = (fixuint_t)(b ^ s) + (-s); // negate if s == -1
+ s = a >> N; // s = a < 0 ? -1 : 0
+ fixuint_t a_u = (fixuint_t)(a ^ s) + (-s); // negate if s == -1
+ fixuint_t res;
+ ASSIGN_UMOD(res, a_u, b_u);
+ return (res ^ s) + (-s); // negate if s == -1
+}
+#endif // ASSIGN_UMOD
diff --git a/cpukit/compiler-rt/lib/builtins/int_endianness.h b/cpukit/compiler-rt/lib/builtins/int_endianness.h
new file mode 100644
index 0000000000..291c6b58c8
--- /dev/null
+++ b/cpukit/compiler-rt/lib/builtins/int_endianness.h
@@ -0,0 +1,114 @@
+//===-- int_endianness.h - configuration header for compiler-rt -----------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a configuration header for compiler-rt.
+// This file is not part of the interface of this library.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef INT_ENDIANNESS_H
+#define INT_ENDIANNESS_H
+
+#if defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && \
+ defined(__ORDER_LITTLE_ENDIAN__)
+
+// Clang and GCC provide built-in endianness definitions.
+#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+#define _YUGA_LITTLE_ENDIAN 0
+#define _YUGA_BIG_ENDIAN 1
+#elif __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+#define _YUGA_LITTLE_ENDIAN 1
+#define _YUGA_BIG_ENDIAN 0
+#endif // __BYTE_ORDER__
+
+#else // Compilers other than Clang or GCC.
+
+#if defined(__SVR4) && defined(__sun)
+#include <sys/byteorder.h>
+
+#if defined(_BIG_ENDIAN)
+#define _YUGA_LITTLE_ENDIAN 0
+#define _YUGA_BIG_ENDIAN 1
+#elif defined(_LITTLE_ENDIAN)
+#define _YUGA_LITTLE_ENDIAN 1
+#define _YUGA_BIG_ENDIAN 0
+#else // !_LITTLE_ENDIAN
+#error "unknown endianness"
+#endif // !_LITTLE_ENDIAN
+
+#endif // Solaris
+
+// ..
+
+#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__) || \
+ defined(__minix)
+#include <sys/endian.h>
+
+#if _BYTE_ORDER == _BIG_ENDIAN
+#define _YUGA_LITTLE_ENDIAN 0
+#define _YUGA_BIG_ENDIAN 1
+#elif _BYTE_ORDER == _LITTLE_ENDIAN
+#define _YUGA_LITTLE_ENDIAN 1
+#define _YUGA_BIG_ENDIAN 0
+#endif // _BYTE_ORDER
+
+#endif // *BSD
+
+#if defined(__OpenBSD__)
+#include <machine/endian.h>
+
+#if _BYTE_ORDER == _BIG_ENDIAN
+#define _YUGA_LITTLE_ENDIAN 0
+#define _YUGA_BIG_ENDIAN 1
+#elif _BYTE_ORDER == _LITTLE_ENDIAN
+#define _YUGA_LITTLE_ENDIAN 1
+#define _YUGA_BIG_ENDIAN 0
+#endif // _BYTE_ORDER
+
+#endif // OpenBSD
+
+// ..
+
+// Mac OSX has __BIG_ENDIAN__ or __LITTLE_ENDIAN__ automatically set by the
+// compiler (at least with GCC)
+#if defined(__APPLE__) || defined(__ellcc__)
+
+#ifdef __BIG_ENDIAN__
+#if __BIG_ENDIAN__
+#define _YUGA_LITTLE_ENDIAN 0
+#define _YUGA_BIG_ENDIAN 1
+#endif
+#endif // __BIG_ENDIAN__
+
+#ifdef __LITTLE_ENDIAN__
+#if __LITTLE_ENDIAN__
+#define _YUGA_LITTLE_ENDIAN 1
+#define _YUGA_BIG_ENDIAN 0
+#endif
+#endif // __LITTLE_ENDIAN__
+
+#endif // Mac OSX
+
+// ..
+
+#if defined(_WIN32)
+
+#define _YUGA_LITTLE_ENDIAN 1
+#define _YUGA_BIG_ENDIAN 0
+
+#endif // Windows
+
+#endif // Clang or GCC.
+
+// .
+
+#if !defined(_YUGA_LITTLE_ENDIAN) || !defined(_YUGA_BIG_ENDIAN)
+#error Unable to determine endian
+#endif // Check we found an endianness correctly.
+
+#endif // INT_ENDIANNESS_H
diff --git a/cpukit/compiler-rt/lib/builtins/int_lib.h b/cpukit/compiler-rt/lib/builtins/int_lib.h
new file mode 100644
index 0000000000..04ea2d9105
--- /dev/null
+++ b/cpukit/compiler-rt/lib/builtins/int_lib.h
@@ -0,0 +1,171 @@
+//===-- int_lib.h - configuration header for compiler-rt -----------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a configuration header for compiler-rt.
+// This file is not part of the interface of this library.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef INT_LIB_H
+#define INT_LIB_H
+
+// Assumption: Signed integral is 2's complement.
+// Assumption: Right shift of signed negative is arithmetic shift.
+// Assumption: Endianness is little or big (not mixed).
+
+// ABI macro definitions
+
+#if __ARM_EABI__
+#ifdef COMPILER_RT_ARMHF_TARGET
+#define COMPILER_RT_ABI
+#else
+#define COMPILER_RT_ABI __attribute__((__pcs__("aapcs")))
+#endif
+#else
+#define COMPILER_RT_ABI
+#endif
+
+#define AEABI_RTABI __attribute__((__pcs__("aapcs")))
+
+#if defined(_MSC_VER) && !defined(__clang__)
+#define ALWAYS_INLINE __forceinline
+#define NOINLINE __declspec(noinline)
+#define NORETURN __declspec(noreturn)
+#define UNUSED
+#else
+#define ALWAYS_INLINE __attribute__((always_inline))
+#define NOINLINE __attribute__((noinline))
+#define NORETURN __attribute__((noreturn))
+#define UNUSED __attribute__((unused))
+#endif
+
+#define STR(a) #a
+#define XSTR(a) STR(a)
+#define SYMBOL_NAME(name) XSTR(__USER_LABEL_PREFIX__) #name
+
+#if defined(__ELF__) || defined(__MINGW32__) || defined(__wasm__) || \
+ defined(_AIX) || defined(__CYGWIN__)
+#define COMPILER_RT_ALIAS(name, aliasname) \
+ COMPILER_RT_ABI __typeof(name) aliasname __attribute__((__alias__(#name)));
+#elif defined(__APPLE__)
+#if defined(VISIBILITY_HIDDEN)
+#define COMPILER_RT_ALIAS_VISIBILITY(name) \
+ __asm__(".private_extern " SYMBOL_NAME(name));
+#else
+#define COMPILER_RT_ALIAS_VISIBILITY(name)
+#endif
+#define COMPILER_RT_ALIAS(name, aliasname) \
+ __asm__(".globl " SYMBOL_NAME(aliasname)); \
+ COMPILER_RT_ALIAS_VISIBILITY(aliasname) \
+ __asm__(SYMBOL_NAME(aliasname) " = " SYMBOL_NAME(name)); \
+ COMPILER_RT_ABI __typeof(name) aliasname;
+#elif defined(_WIN32)
+#define COMPILER_RT_ALIAS(name, aliasname)
+#else
+#error Unsupported target
+#endif
+
+#if (defined(__FreeBSD__) || defined(__NetBSD__)) && \
+ (defined(_KERNEL) || defined(_STANDALONE))
+//
+// Kernel and boot environment can't use normal headers,
+// so use the equivalent system headers.
+// NB: FreeBSD (and OpenBSD) deprecate machine/limits.h in
+// favour of sys/limits.h, so prefer the former, but fall
+// back on the latter if not available since NetBSD only has
+// the latter.
+//
+#if defined(__has_include) && __has_include(<sys/limits.h>)
+#include <sys/limits.h>
+#else
+#include <machine/limits.h>
+#endif
+#include <sys/stdint.h>
+#include <sys/types.h>
+#else
+// Include the standard compiler builtin headers we use functionality from.
+#include <float.h>
+#include <limits.h>
+#include <stdbool.h>
+#include <stdint.h>
+#endif
+
+// Include the commonly used internal type definitions.
+#include "int_types.h"
+
+// Include internal utility function declarations.
+#include "int_util.h"
+
+COMPILER_RT_ABI int __paritysi2(si_int a);
+COMPILER_RT_ABI int __paritydi2(di_int a);
+
+COMPILER_RT_ABI di_int __divdi3(di_int a, di_int b);
+COMPILER_RT_ABI si_int __divsi3(si_int a, si_int b);
+COMPILER_RT_ABI su_int __udivsi3(su_int n, su_int d);
+
+COMPILER_RT_ABI su_int __udivmodsi4(su_int a, su_int b, su_int *rem);
+COMPILER_RT_ABI du_int __udivmoddi4(du_int a, du_int b, du_int *rem);
+#ifdef CRT_HAS_128BIT
+COMPILER_RT_ABI int __clzti2(ti_int a);
+COMPILER_RT_ABI tu_int __udivmodti4(tu_int a, tu_int b, tu_int *rem);
+#endif
+
+// Definitions for builtins unavailable on MSVC
+#if defined(_MSC_VER) && !defined(__clang__)
+#include <intrin.h>
+
+int __inline __builtin_ctz(uint32_t value) {
+ unsigned long trailing_zero = 0;
+ if (_BitScanForward(&trailing_zero, value))
+ return trailing_zero;
+ return 32;
+}
+
+int __inline __builtin_clz(uint32_t value) {
+ unsigned long leading_zero = 0;
+ if (_BitScanReverse(&leading_zero, value))
+ return 31 - leading_zero;
+ return 32;
+}
+
+#if defined(_M_ARM) || defined(_M_X64)
+int __inline __builtin_clzll(uint64_t value) {
+ unsigned long leading_zero = 0;
+ if (_BitScanReverse64(&leading_zero, value))
+ return 63 - leading_zero;
+ return 64;
+}
+#else
+int __inline __builtin_clzll(uint64_t value) {
+ if (value == 0)
+ return 64;
+ uint32_t msh = (uint32_t)(value >> 32);
+ uint32_t lsh = (uint32_t)(value & 0xFFFFFFFF);
+ if (msh != 0)
+ return __builtin_clz(msh);
+ return 32 + __builtin_clz(lsh);
+}
+#endif
+
+#define __builtin_clzl __builtin_clzll
+
+bool __inline __builtin_sadd_overflow(int x, int y, int *result) {
+ if ((x < 0) != (y < 0)) {
+ *result = x + y;
+ return false;
+ }
+ int tmp = (unsigned int)x + (unsigned int)y;
+ if ((tmp < 0) != (x < 0))
+ return true;
+ *result = tmp;
+ return false;
+}
+
+#endif // defined(_MSC_VER) && !defined(__clang__)
+
+#endif // INT_LIB_H
diff --git a/cpukit/compiler-rt/lib/builtins/int_types.h b/cpukit/compiler-rt/lib/builtins/int_types.h
new file mode 100644
index 0000000000..e94d3154c6
--- /dev/null
+++ b/cpukit/compiler-rt/lib/builtins/int_types.h
@@ -0,0 +1,198 @@
+//===-- int_lib.h - configuration header for compiler-rt -----------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is not part of the interface of this library.
+//
+// This file defines various standard types, most importantly a number of unions
+// used to access parts of larger types.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef INT_TYPES_H
+#define INT_TYPES_H
+
+#include "int_endianness.h"
+
+// si_int is defined in Linux sysroot's asm-generic/siginfo.h
+#ifdef si_int
+#undef si_int
+#endif
+typedef int32_t si_int;
+typedef uint32_t su_int;
+#if UINT_MAX == 0xFFFFFFFF
+#define clzsi __builtin_clz
+#define ctzsi __builtin_ctz
+#elif ULONG_MAX == 0xFFFFFFFF
+#define clzsi __builtin_clzl
+#define ctzsi __builtin_ctzl
+#else
+#error could not determine appropriate clzsi macro for this system
+#endif
+
+typedef int64_t di_int;
+typedef uint64_t du_int;
+
+typedef union {
+ di_int all;
+ struct {
+#if _YUGA_LITTLE_ENDIAN
+ su_int low;
+ si_int high;
+#else
+ si_int high;
+ su_int low;
+#endif // _YUGA_LITTLE_ENDIAN
+ } s;
+} dwords;
+
+typedef union {
+ du_int all;
+ struct {
+#if _YUGA_LITTLE_ENDIAN
+ su_int low;
+ su_int high;
+#else
+ su_int high;
+ su_int low;
+#endif // _YUGA_LITTLE_ENDIAN
+ } s;
+} udwords;
+
+#if defined(__LP64__) || defined(__wasm__) || defined(__mips64) || \
+ defined(__SIZEOF_INT128__) || defined(_WIN64)
+#define CRT_HAS_128BIT
+#endif
+
+// MSVC doesn't have a working 128bit integer type. Users should really compile
+// compiler-rt with clang, but if they happen to be doing a standalone build for
+// asan or something else, disable the 128 bit parts so things sort of work.
+#if defined(_MSC_VER) && !defined(__clang__)
+#undef CRT_HAS_128BIT
+#endif
+
+#ifdef CRT_HAS_128BIT
+typedef int ti_int __attribute__((mode(TI)));
+typedef unsigned tu_int __attribute__((mode(TI)));
+
+typedef union {
+ ti_int all;
+ struct {
+#if _YUGA_LITTLE_ENDIAN
+ du_int low;
+ di_int high;
+#else
+ di_int high;
+ du_int low;
+#endif // _YUGA_LITTLE_ENDIAN
+ } s;
+} twords;
+
+typedef union {
+ tu_int all;
+ struct {
+#if _YUGA_LITTLE_ENDIAN
+ du_int low;
+ du_int high;
+#else
+ du_int high;
+ du_int low;
+#endif // _YUGA_LITTLE_ENDIAN
+ } s;
+} utwords;
+
+static __inline ti_int make_ti(di_int h, di_int l) {
+ twords r;
+ r.s.high = h;
+ r.s.low = l;
+ return r.all;
+}
+
+static __inline tu_int make_tu(du_int h, du_int l) {
+ utwords r;
+ r.s.high = h;
+ r.s.low = l;
+ return r.all;
+}
+
+#endif // CRT_HAS_128BIT
+
+// FreeBSD's boot environment does not support using floating-point and poisons
+// the float and double keywords.
+#if defined(__FreeBSD__) && defined(_STANDALONE)
+#define CRT_HAS_FLOATING_POINT 0
+#else
+#define CRT_HAS_FLOATING_POINT 1
+#endif
+
+#if CRT_HAS_FLOATING_POINT
+typedef union {
+ su_int u;
+ float f;
+} float_bits;
+
+typedef union {
+ udwords u;
+ double f;
+} double_bits;
+#endif
+
+typedef struct {
+#if _YUGA_LITTLE_ENDIAN
+ udwords low;
+ udwords high;
+#else
+ udwords high;
+ udwords low;
+#endif // _YUGA_LITTLE_ENDIAN
+} uqwords;
+
+// Check if the target supports 80 bit extended precision long doubles.
+// Notably, on x86 Windows, MSVC only provides a 64-bit long double, but GCC
+// still makes it 80 bits. Clang will match whatever compiler it is trying to
+// be compatible with. On 32-bit x86 Android, long double is 64 bits, while on
+// x86_64 Android, long double is 128 bits.
+#if (defined(__i386__) || defined(__x86_64__)) && \
+ !(defined(_MSC_VER) || defined(__ANDROID__))
+#define HAS_80_BIT_LONG_DOUBLE 1
+#elif defined(__m68k__) || defined(__ia64__)
+#define HAS_80_BIT_LONG_DOUBLE 1
+#else
+#define HAS_80_BIT_LONG_DOUBLE 0
+#endif
+
+#if CRT_HAS_FLOATING_POINT
+typedef union {
+ uqwords u;
+ long double f;
+} long_double_bits;
+
+#if __STDC_VERSION__ >= 199901L
+typedef float _Complex Fcomplex;
+typedef double _Complex Dcomplex;
+typedef long double _Complex Lcomplex;
+
+#define COMPLEX_REAL(x) __real__(x)
+#define COMPLEX_IMAGINARY(x) __imag__(x)
+#else
+typedef struct {
+ float real, imaginary;
+} Fcomplex;
+
+typedef struct {
+ double real, imaginary;
+} Dcomplex;
+
+typedef struct {
+ long double real, imaginary;
+} Lcomplex;
+
+#define COMPLEX_REAL(x) (x).real
+#define COMPLEX_IMAGINARY(x) (x).imaginary
+#endif
+#endif
+#endif // INT_TYPES_H
diff --git a/cpukit/compiler-rt/lib/builtins/int_util.h b/cpukit/compiler-rt/lib/builtins/int_util.h
new file mode 100644
index 0000000000..c372c2edc6
--- /dev/null
+++ b/cpukit/compiler-rt/lib/builtins/int_util.h
@@ -0,0 +1,47 @@
+//===-- int_util.h - internal utility functions ---------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is not part of the interface of this library.
+//
+// This file defines non-inline utilities which are available for use in the
+// library. The function definitions themselves are all contained in int_util.c
+// which will always be compiled into any compiler-rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef INT_UTIL_H
+#define INT_UTIL_H
+
+/// \brief Trigger a program abort (or panic for kernel code).
+#define compilerrt_abort() __compilerrt_abort_impl(__FILE__, __LINE__, __func__)
+
+NORETURN void __compilerrt_abort_impl(const char *file, int line,
+ const char *function);
+
+#define COMPILE_TIME_ASSERT(expr) COMPILE_TIME_ASSERT1(expr, __COUNTER__)
+#define COMPILE_TIME_ASSERT1(expr, cnt) COMPILE_TIME_ASSERT2(expr, cnt)
+#define COMPILE_TIME_ASSERT2(expr, cnt) \
+ typedef char ct_assert_##cnt[(expr) ? 1 : -1] UNUSED
+
+// Force unrolling the code specified to be repeated N times.
+#define REPEAT_0_TIMES(code_to_repeat) /* do nothing */
+#define REPEAT_1_TIMES(code_to_repeat) code_to_repeat
+#define REPEAT_2_TIMES(code_to_repeat) \
+ REPEAT_1_TIMES(code_to_repeat) \
+ code_to_repeat
+#define REPEAT_3_TIMES(code_to_repeat) \
+ REPEAT_2_TIMES(code_to_repeat) \
+ code_to_repeat
+#define REPEAT_4_TIMES(code_to_repeat) \
+ REPEAT_3_TIMES(code_to_repeat) \
+ code_to_repeat
+
+#define REPEAT_N_TIMES_(N, code_to_repeat) REPEAT_##N##_TIMES(code_to_repeat)
+#define REPEAT_N_TIMES(N, code_to_repeat) REPEAT_N_TIMES_(N, code_to_repeat)
+
+#endif // INT_UTIL_H
diff --git a/cpukit/compiler-rt/lib/builtins/moddi3.c b/cpukit/compiler-rt/lib/builtins/moddi3.c
new file mode 100644
index 0000000000..15cf80b995
--- /dev/null
+++ b/cpukit/compiler-rt/lib/builtins/moddi3.c
@@ -0,0 +1,22 @@
+//===-- moddi3.c - Implement __moddi3 -------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __moddi3 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+
+// Returns: a % b
+
+#define fixint_t di_int
+#define fixuint_t du_int
+#define ASSIGN_UMOD(res, a, b) __udivmoddi4((a), (b), &(res))
+#include "int_div_impl.inc"
+
+COMPILER_RT_ABI di_int __moddi3(di_int a, di_int b) { return __modXi3(a, b); }
diff --git a/cpukit/compiler-rt/lib/builtins/paritydi2.c b/cpukit/compiler-rt/lib/builtins/paritydi2.c
new file mode 100644
index 0000000000..350dceb8ce
--- /dev/null
+++ b/cpukit/compiler-rt/lib/builtins/paritydi2.c
@@ -0,0 +1,25 @@
+//===-- paritydi2.c - Implement __paritydi2 -------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __paritydi2 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+
+// Returns: 1 if number of bits is odd else returns 0
+
+COMPILER_RT_ABI int __paritydi2(di_int a) {
+ dwords x;
+ x.all = a;
+ su_int x2 = x.s.high ^ x.s.low;
+ x2 ^= x2 >> 16;
+ x2 ^= x2 >> 8;
+ x2 ^= x2 >> 4;
+ return (0x6996 >> (x2 & 0xF)) & 1;
+}
diff --git a/cpukit/compiler-rt/lib/builtins/paritysi2.c b/cpukit/compiler-rt/lib/builtins/paritysi2.c
new file mode 100644
index 0000000000..a4b84e0806
--- /dev/null
+++ b/cpukit/compiler-rt/lib/builtins/paritysi2.c
@@ -0,0 +1,23 @@
+//===-- paritysi2.c - Implement __paritysi2 -------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __paritysi2 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+
+// Returns: 1 if number of bits is odd else returns 0
+
+COMPILER_RT_ABI int __paritysi2(si_int a) {
+ su_int x = (su_int)a;
+ x ^= x >> 16;
+ x ^= x >> 8;
+ x ^= x >> 4;
+ return (0x6996 >> (x & 0xF)) & 1;
+}
diff --git a/cpukit/compiler-rt/lib/builtins/popcountdi2.c b/cpukit/compiler-rt/lib/builtins/popcountdi2.c
new file mode 100644
index 0000000000..20dd0b0239
--- /dev/null
+++ b/cpukit/compiler-rt/lib/builtins/popcountdi2.c
@@ -0,0 +1,32 @@
+//===-- popcountdi2.c - Implement __popcountdi2 ---------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __popcountdi2 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+
+// Returns: count of 1 bits
+
+COMPILER_RT_ABI int __popcountdi2(di_int a) {
+ du_int x2 = (du_int)a;
+ x2 = x2 - ((x2 >> 1) & 0x5555555555555555uLL);
+ // Every 2 bits holds the sum of every pair of bits (32)
+ x2 = ((x2 >> 2) & 0x3333333333333333uLL) + (x2 & 0x3333333333333333uLL);
+ // Every 4 bits holds the sum of every 4-set of bits (3 significant bits) (16)
+ x2 = (x2 + (x2 >> 4)) & 0x0F0F0F0F0F0F0F0FuLL;
+ // Every 8 bits holds the sum of every 8-set of bits (4 significant bits) (8)
+ su_int x = (su_int)(x2 + (x2 >> 32));
+ // The lower 32 bits hold four 16 bit sums (5 significant bits).
+ // Upper 32 bits are garbage
+ x = x + (x >> 16);
+ // The lower 16 bits hold two 32 bit sums (6 significant bits).
+ // Upper 16 bits are garbage
+ return (x + (x >> 8)) & 0x0000007F; // (7 significant bits)
+}
diff --git a/cpukit/compiler-rt/lib/builtins/popcountsi2.c b/cpukit/compiler-rt/lib/builtins/popcountsi2.c
new file mode 100644
index 0000000000..4d346c45d9
--- /dev/null
+++ b/cpukit/compiler-rt/lib/builtins/popcountsi2.c
@@ -0,0 +1,29 @@
+//===-- popcountsi2.c - Implement __popcountsi2 ---------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __popcountsi2 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+
+// Returns: count of 1 bits
+
+COMPILER_RT_ABI int __popcountsi2(si_int a) {
+ su_int x = (su_int)a;
+ x = x - ((x >> 1) & 0x55555555);
+ // Every 2 bits holds the sum of every pair of bits
+ x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
+ // Every 4 bits holds the sum of every 4-set of bits (3 significant bits)
+ x = (x + (x >> 4)) & 0x0F0F0F0F;
+ // Every 8 bits holds the sum of every 8-set of bits (4 significant bits)
+ x = (x + (x >> 16));
+ // The lower 16 bits hold two 8 bit sums (5 significant bits).
+ // Upper 16 bits are garbage
+ return (x + (x >> 8)) & 0x0000003F; // (6 significant bits)
+}
diff --git a/cpukit/compiler-rt/lib/builtins/udivdi3.c b/cpukit/compiler-rt/lib/builtins/udivdi3.c
new file mode 100644
index 0000000000..74319cbe71
--- /dev/null
+++ b/cpukit/compiler-rt/lib/builtins/udivdi3.c
@@ -0,0 +1,23 @@
+//===-- udivdi3.c - Implement __udivdi3 -----------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __udivdi3 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+
+typedef du_int fixuint_t;
+typedef di_int fixint_t;
+#include "int_div_impl.inc"
+
+// Returns: a / b
+
+COMPILER_RT_ABI du_int __udivdi3(du_int a, du_int b) {
+ return __udivXi3(a, b);
+}
diff --git a/cpukit/compiler-rt/lib/builtins/udivmoddi4.c b/cpukit/compiler-rt/lib/builtins/udivmoddi4.c
new file mode 100644
index 0000000000..123e5fb05f
--- /dev/null
+++ b/cpukit/compiler-rt/lib/builtins/udivmoddi4.c
@@ -0,0 +1,200 @@
+//===-- udivmoddi4.c - Implement __udivmoddi4 -----------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __udivmoddi4 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+
+// Effects: if rem != 0, *rem = a % b
+// Returns: a / b
+
+// Translated from Figure 3-40 of The PowerPC Compiler Writer's Guide
+
+#if defined(_MSC_VER) && !defined(__clang__)
+// MSVC throws a warning about mod 0 here, disable it for builds that
+// warn-as-error
+#pragma warning(push)
+#pragma warning(disable : 4723 4724)
+#endif
+
+COMPILER_RT_ABI du_int __udivmoddi4(du_int a, du_int b, du_int *rem) {
+ const unsigned n_uword_bits = sizeof(su_int) * CHAR_BIT;
+ const unsigned n_udword_bits = sizeof(du_int) * CHAR_BIT;
+ udwords n;
+ n.all = a;
+ udwords d;
+ d.all = b;
+ udwords q;
+ udwords r;
+ unsigned sr;
+ // special cases, X is unknown, K != 0
+ if (n.s.high == 0) {
+ if (d.s.high == 0) {
+ // 0 X
+ // ---
+ // 0 X
+ if (rem)
+ *rem = n.s.low % d.s.low;
+ return n.s.low / d.s.low;
+ }
+ // 0 X
+ // ---
+ // K X
+ if (rem)
+ *rem = n.s.low;
+ return 0;
+ }
+ // n.s.high != 0
+ if (d.s.low == 0) {
+ if (d.s.high == 0) {
+ // K X
+ // ---
+ // 0 0
+ if (rem)
+ *rem = n.s.high % d.s.low;
+ return n.s.high / d.s.low;
+ }
+ // d.s.high != 0
+ if (n.s.low == 0) {
+ // K 0
+ // ---
+ // K 0
+ if (rem) {
+ r.s.high = n.s.high % d.s.high;
+ r.s.low = 0;
+ *rem = r.all;
+ }
+ return n.s.high / d.s.high;
+ }
+ // K K
+ // ---
+ // K 0
+ if ((d.s.high & (d.s.high - 1)) == 0) /* if d is a power of 2 */ {
+ if (rem) {
+ r.s.low = n.s.low;
+ r.s.high = n.s.high & (d.s.high - 1);
+ *rem = r.all;
+ }
+ return n.s.high >> ctzsi(d.s.high);
+ }
+ // K K
+ // ---
+ // K 0
+ sr = clzsi(d.s.high) - clzsi(n.s.high);
+ // 0 <= sr <= n_uword_bits - 2 or sr large
+ if (sr > n_uword_bits - 2) {
+ if (rem)
+ *rem = n.all;
+ return 0;
+ }
+ ++sr;
+ // 1 <= sr <= n_uword_bits - 1
+ // q.all = n.all << (n_udword_bits - sr);
+ q.s.low = 0;
+ q.s.high = n.s.low << (n_uword_bits - sr);
+ // r.all = n.all >> sr;
+ r.s.high = n.s.high >> sr;
+ r.s.low = (n.s.high << (n_uword_bits - sr)) | (n.s.low >> sr);
+ } else /* d.s.low != 0 */ {
+ if (d.s.high == 0) {
+ // K X
+ // ---
+ // 0 K
+ if ((d.s.low & (d.s.low - 1)) == 0) /* if d is a power of 2 */ {
+ if (rem)
+ *rem = n.s.low & (d.s.low - 1);
+ if (d.s.low == 1)
+ return n.all;
+ sr = ctzsi(d.s.low);
+ q.s.high = n.s.high >> sr;
+ q.s.low = (n.s.high << (n_uword_bits - sr)) | (n.s.low >> sr);
+ return q.all;
+ }
+ // K X
+ // ---
+ // 0 K
+ sr = 1 + n_uword_bits + clzsi(d.s.low) - clzsi(n.s.high);
+ // 2 <= sr <= n_udword_bits - 1
+ // q.all = n.all << (n_udword_bits - sr);
+ // r.all = n.all >> sr;
+ if (sr == n_uword_bits) {
+ q.s.low = 0;
+ q.s.high = n.s.low;
+ r.s.high = 0;
+ r.s.low = n.s.high;
+ } else if (sr < n_uword_bits) /* 2 <= sr <= n_uword_bits - 1 */ {
+ q.s.low = 0;
+ q.s.high = n.s.low << (n_uword_bits - sr);
+ r.s.high = n.s.high >> sr;
+ r.s.low = (n.s.high << (n_uword_bits - sr)) | (n.s.low >> sr);
+ } else /* n_uword_bits + 1 <= sr <= n_udword_bits - 1 */ {
+ q.s.low = n.s.low << (n_udword_bits - sr);
+ q.s.high = (n.s.high << (n_udword_bits - sr)) |
+ (n.s.low >> (sr - n_uword_bits));
+ r.s.high = 0;
+ r.s.low = n.s.high >> (sr - n_uword_bits);
+ }
+ } else {
+ // K X
+ // ---
+ // K K
+ sr = clzsi(d.s.high) - clzsi(n.s.high);
+ // 0 <= sr <= n_uword_bits - 1 or sr large
+ if (sr > n_uword_bits - 1) {
+ if (rem)
+ *rem = n.all;
+ return 0;
+ }
+ ++sr;
+ // 1 <= sr <= n_uword_bits
+ // q.all = n.all << (n_udword_bits - sr);
+ q.s.low = 0;
+ if (sr == n_uword_bits) {
+ q.s.high = n.s.low;
+ r.s.high = 0;
+ r.s.low = n.s.high;
+ } else {
+ q.s.high = n.s.low << (n_uword_bits - sr);
+ r.s.high = n.s.high >> sr;
+ r.s.low = (n.s.high << (n_uword_bits - sr)) | (n.s.low >> sr);
+ }
+ }
+ }
+ // Not a special case
+ // q and r are initialized with:
+ // q.all = n.all << (n_udword_bits - sr);
+ // r.all = n.all >> sr;
+ // 1 <= sr <= n_udword_bits - 1
+ su_int carry = 0;
+ for (; sr > 0; --sr) {
+ // r:q = ((r:q) << 1) | carry
+ r.s.high = (r.s.high << 1) | (r.s.low >> (n_uword_bits - 1));
+ r.s.low = (r.s.low << 1) | (q.s.high >> (n_uword_bits - 1));
+ q.s.high = (q.s.high << 1) | (q.s.low >> (n_uword_bits - 1));
+ q.s.low = (q.s.low << 1) | carry;
+ // carry = 0;
+ // if (r.all >= d.all)
+ // {
+ // r.all -= d.all;
+ // carry = 1;
+ // }
+ const di_int s = (di_int)(d.all - r.all - 1) >> (n_udword_bits - 1);
+ carry = s & 1;
+ r.all -= d.all & s;
+ }
+ q.all = (q.all << 1) | carry;
+ if (rem)
+ *rem = r.all;
+ return q.all;
+}
+
+#if defined(_MSC_VER) && !defined(__clang__)
+#pragma warning(pop)
+#endif
diff --git a/cpukit/compiler-rt/lib/builtins/umoddi3.c b/cpukit/compiler-rt/lib/builtins/umoddi3.c
new file mode 100644
index 0000000000..e672da96ef
--- /dev/null
+++ b/cpukit/compiler-rt/lib/builtins/umoddi3.c
@@ -0,0 +1,23 @@
+//===-- umoddi3.c - Implement __umoddi3 -----------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __umoddi3 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+
+typedef du_int fixuint_t;
+typedef di_int fixint_t;
+#include "int_div_impl.inc"
+
+// Returns: a % b
+
+COMPILER_RT_ABI du_int __umoddi3(du_int a, du_int b) {
+ return __umodXi3(a, b);
+}
diff --git a/cpukit/doxygen/top-level-groups.h b/cpukit/doxygen/top-level-groups.h
index 674672b21e..e7f4a5e9fb 100644
--- a/cpukit/doxygen/top-level-groups.h
+++ b/cpukit/doxygen/top-level-groups.h
@@ -201,3 +201,187 @@
*
* @brief This source file contains the implemention of a C library function.
*/
+
+/**
+ * @defgroup RTEMSImplCompilerBuiltins Compiler Builtins
+ *
+ * @ingroup RTEMSImpl
+ *
+ * @brief This group contains the implementation of compiler builtins.
+ */
+
+/**
+ * @file cpukit/compiler-rt/lib/builtins/bswapdi2.c
+ *
+ * @ingroup RTEMSImplCompilerBuiltins
+ *
+ * @brief This source file contains the implemention of a compiler builtin.
+ */
+
+/**
+ * @file cpukit/compiler-rt/lib/builtins/bswapsi2.c
+ *
+ * @ingroup RTEMSImplCompilerBuiltins
+ *
+ * @brief This source file contains the implemention of a compiler builtin.
+ */
+
+/**
+ * @file cpukit/compiler-rt/lib/builtins/clzsi2.c
+ *
+ * @ingroup RTEMSImplCompilerBuiltins
+ *
+ * @brief This source file contains the implemention of a compiler builtin.
+ */
+
+/**
+ * @file cpukit/compiler-rt/lib/builtins/clzdi2.c
+ *
+ * @ingroup RTEMSImplCompilerBuiltins
+ *
+ * @brief This source file contains the implemention of a compiler builtin.
+ */
+
+/**
+ * @file cpukit/compiler-rt/lib/builtins/ctzsi2.c
+ *
+ * @ingroup RTEMSImplCompilerBuiltins
+ *
+ * @brief This source file contains the implemention of a compiler builtin.
+ */
+
+/**
+ * @file cpukit/compiler-rt/lib/builtins/ctzdi2.c
+ *
+ * @ingroup RTEMSImplCompilerBuiltins
+ *
+ * @brief This source file contains the implemention of a compiler builtin.
+ */
+
+/**
+ * @file cpukit/compiler-rt/lib/builtins/divdi3.c
+ *
+ * @ingroup RTEMSImplCompilerBuiltins
+ *
+ * @brief This source file contains the implemention of a compiler builtin.
+ */
+
+/**
+ * @file cpukit/compiler-rt/lib/builtins/ffsdi2.c
+ *
+ * @ingroup RTEMSImplCompilerBuiltins
+ *
+ * @brief This source file contains the implemention of a compiler builtin.
+ */
+
+/**
+ * @file cpukit/compiler-rt/lib/builtins/ffssi2.c
+ *
+ * @ingroup RTEMSImplCompilerBuiltins
+ *
+ * @brief This source file contains the implemention of a compiler builtin.
+ */
+
+/**
+ * @file cpukit/compiler-rt/lib/builtins/int_div_impl.inc
+ *
+ * @ingroup RTEMSImplCompilerBuiltins
+ *
+ * @brief This header file contains the implemention of compiler builtins.
+ */
+
+/**
+ * @file cpukit/compiler-rt/lib/builtins/int_endianness.h
+ *
+ * @ingroup RTEMSImplCompilerBuiltins
+ *
+ * @brief This source file contains the implemention of a compiler builtin.
+ */
+
+/**
+ * @file cpukit/compiler-rt/lib/builtins/int_lib.h
+ *
+ * @ingroup RTEMSImplCompilerBuiltins
+ *
+ * @brief This header file provides interfaces for compiler builtins.
+ */
+
+/**
+ * @file cpukit/compiler-rt/lib/builtins/int_types.h
+ *
+ * @ingroup RTEMSImplCompilerBuiltins
+ *
+ * @brief This header file provides interfaces for compiler builtins.
+ */
+
+/**
+ * @file cpukit/compiler-rt/lib/builtins/int_util.h
+ *
+ * @ingroup RTEMSImplCompilerBuiltins
+ *
+ * @brief This header file provides interfaces for compiler builtins.
+ */
+
+/**
+ * @file cpukit/compiler-rt/lib/builtins/moddi3.c
+ *
+ * @ingroup RTEMSImplCompilerBuiltins
+ *
+ * @brief This source file contains the implemention of a compiler builtin.
+ */
+
+/**
+ * @file cpukit/compiler-rt/lib/builtins/paritydi2.c
+ *
+ * @ingroup RTEMSImplCompilerBuiltins
+ *
+ * @brief This source file contains the implemention of a compiler builtin.
+ */
+
+/**
+ * @file cpukit/compiler-rt/lib/builtins/paritysi2.c
+ *
+ * @ingroup RTEMSImplCompilerBuiltins
+ *
+ * @brief This source file contains the implemention of a compiler builtin.
+ */
+
+/**
+ * @file cpukit/compiler-rt/lib/builtins/popcountdi2.c
+ *
+ * @ingroup RTEMSImplCompilerBuiltins
+ *
+ * @brief This source file contains the implemention of a compiler builtin.
+ */
+
+/**
+ * @file cpukit/compiler-rt/lib/builtins/popcountsi2.c
+ *
+ * @ingroup RTEMSImplCompilerBuiltins
+ *
+ * @brief This source file contains the implemention of a compiler builtin.
+ */
+
+/**
+ * @file cpukit/compiler-rt/lib/builtins/udivdi3.c
+ *
+ * @ingroup RTEMSImplCompilerBuiltins
+ *
+ * @brief This source file contains the implemention of a compiler builtin.
+ */
+
+/**
+ * @file cpukit/compiler-rt/lib/builtins/udivmoddi4.c
+ *
+ * @ingroup RTEMSImplCompilerBuiltins
+ *
+ * @brief This source file contains the implemention of a compiler builtin.
+ */
+
+/**
+ * @file cpukit/compiler-rt/lib/builtins/umoddi3.c
+ *
+ * @ingroup RTEMSImplCompilerBuiltins
+ *
+ * @brief This source file contains the implemention of a compiler builtin.
+ */
diff --git a/spec/build/bsps/optldflags.yml b/spec/build/bsps/optldflags.yml
index 14aaffc1e5..2f7b7ef937 100644
--- a/spec/build/bsps/optldflags.yml
+++ b/spec/build/bsps/optldflags.yml
@@ -12,8 +12,8 @@ default:
value:
- -nodefaultlibs
- -Wl,--start-group
- - -lrtemscpu
- -lrtemsbsp
+ - -lrtemscpu
- -lgcc
- -Wl,--end-group
- -Wl,--gc-sections
diff --git a/spec/build/cpukit/objqual.yml b/spec/build/cpukit/objqual.yml
index bc95099f88..e1f2d09fe2 100644
--- a/spec/build/cpukit/objqual.yml
+++ b/spec/build/cpukit/objqual.yml
@@ -10,6 +10,23 @@ includes: []
install: []
links: []
source:
+- cpukit/compiler-rt/lib/builtins/bswapdi2.c
+- cpukit/compiler-rt/lib/builtins/bswapsi2.c
+- cpukit/compiler-rt/lib/builtins/clzdi2.c
+- cpukit/compiler-rt/lib/builtins/clzsi2.c
+- cpukit/compiler-rt/lib/builtins/ctzdi2.c
+- cpukit/compiler-rt/lib/builtins/ctzsi2.c
+- cpukit/compiler-rt/lib/builtins/divdi3.c
+- cpukit/compiler-rt/lib/builtins/ffsdi2.c
+- cpukit/compiler-rt/lib/builtins/ffssi2.c
+- cpukit/compiler-rt/lib/builtins/moddi3.c
+- cpukit/compiler-rt/lib/builtins/paritydi2.c
+- cpukit/compiler-rt/lib/builtins/paritysi2.c
+- cpukit/compiler-rt/lib/builtins/popcountdi2.c
+- cpukit/compiler-rt/lib/builtins/popcountsi2.c
+- cpukit/compiler-rt/lib/builtins/udivdi3.c
+- cpukit/compiler-rt/lib/builtins/udivmoddi4.c
+- cpukit/compiler-rt/lib/builtins/umoddi3.c
- cpukit/libc/string/flsl.c
- cpukit/libc/string/memcpy.c
- cpukit/libc/string/memset.c
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