diff options
| -rw-r--r-- | dev-util/gn/files/gn-numerics-arm.patch | 201 | ||||
| -rw-r--r-- | dev-util/gn/gn-0.1479.ebuild | 1 |
2 files changed, 202 insertions, 0 deletions
diff --git a/dev-util/gn/files/gn-numerics-arm.patch b/dev-util/gn/files/gn-numerics-arm.patch new file mode 100644 index 000000000000..f822cdb40852 --- /dev/null +++ b/dev-util/gn/files/gn-numerics-arm.patch @@ -0,0 +1,201 @@ +From 8952cb06749d4bd390991878281bc7e72a6eef2c Mon Sep 17 00:00:00 2001 +From: Mike Gilbert <floppymaster@gmail.com> +Date: Mon, 10 Dec 2018 10:27:20 -0500 +Subject: [PATCH] Add missing headers for ARM + +Bug: https://bugs.gentoo.org/672862 +--- + base/numerics/safe_conversions_arm_impl.h | 51 +++++++++ + base/numerics/safe_math_arm_impl.h | 122 ++++++++++++++++++++++ + 2 files changed, 173 insertions(+) + create mode 100644 base/numerics/safe_conversions_arm_impl.h + create mode 100644 base/numerics/safe_math_arm_impl.h + +diff --git a/base/numerics/safe_conversions_arm_impl.h b/base/numerics/safe_conversions_arm_impl.h +new file mode 100644 +index 00000000..da5813f6 +--- /dev/null ++++ b/base/numerics/safe_conversions_arm_impl.h +@@ -0,0 +1,51 @@ ++// Copyright 2017 The Chromium Authors. All rights reserved. ++// Use of this source code is governed by a BSD-style license that can be ++// found in the LICENSE file. ++ ++#ifndef BASE_NUMERICS_SAFE_CONVERSIONS_ARM_IMPL_H_ ++#define BASE_NUMERICS_SAFE_CONVERSIONS_ARM_IMPL_H_ ++ ++#include <cassert> ++#include <limits> ++#include <type_traits> ++ ++#include "base/numerics/safe_conversions_impl.h" ++ ++namespace base { ++namespace internal { ++ ++// Fast saturation to a destination type. ++template <typename Dst, typename Src> ++struct SaturateFastAsmOp { ++ static const bool is_supported = ++ std::is_signed<Src>::value && std::is_integral<Dst>::value && ++ std::is_integral<Src>::value && ++ IntegerBitsPlusSign<Src>::value <= IntegerBitsPlusSign<int32_t>::value && ++ IntegerBitsPlusSign<Dst>::value <= IntegerBitsPlusSign<int32_t>::value && ++ !IsTypeInRangeForNumericType<Dst, Src>::value; ++ ++ __attribute__((always_inline)) static Dst Do(Src value) { ++ int32_t src = value; ++ typename std::conditional<std::is_signed<Dst>::value, int32_t, ++ uint32_t>::type result; ++ if (std::is_signed<Dst>::value) { ++ asm("ssat %[dst], %[shift], %[src]" ++ : [dst] "=r"(result) ++ : [src] "r"(src), [shift] "n"(IntegerBitsPlusSign<Dst>::value <= 32 ++ ? IntegerBitsPlusSign<Dst>::value ++ : 32)); ++ } else { ++ asm("usat %[dst], %[shift], %[src]" ++ : [dst] "=r"(result) ++ : [src] "r"(src), [shift] "n"(IntegerBitsPlusSign<Dst>::value < 32 ++ ? IntegerBitsPlusSign<Dst>::value ++ : 31)); ++ } ++ return static_cast<Dst>(result); ++ } ++}; ++ ++} // namespace internal ++} // namespace base ++ ++#endif // BASE_NUMERICS_SAFE_CONVERSIONS_ARM_IMPL_H_ +diff --git a/base/numerics/safe_math_arm_impl.h b/base/numerics/safe_math_arm_impl.h +new file mode 100644 +index 00000000..a7cda1bb +--- /dev/null ++++ b/base/numerics/safe_math_arm_impl.h +@@ -0,0 +1,122 @@ ++// Copyright 2017 The Chromium Authors. All rights reserved. ++// Use of this source code is governed by a BSD-style license that can be ++// found in the LICENSE file. ++ ++#ifndef BASE_NUMERICS_SAFE_MATH_ARM_IMPL_H_ ++#define BASE_NUMERICS_SAFE_MATH_ARM_IMPL_H_ ++ ++#include <cassert> ++#include <limits> ++#include <type_traits> ++ ++#include "base/numerics/safe_conversions.h" ++ ++namespace base { ++namespace internal { ++ ++template <typename T, typename U> ++struct CheckedMulFastAsmOp { ++ static const bool is_supported = ++ FastIntegerArithmeticPromotion<T, U>::is_contained; ++ ++ // The following is much more efficient than the Clang and GCC builtins for ++ // performing overflow-checked multiplication when a twice wider type is ++ // available. The below compiles down to 2-3 instructions, depending on the ++ // width of the types in use. ++ // As an example, an int32_t multiply compiles to: ++ // smull r0, r1, r0, r1 ++ // cmp r1, r1, asr #31 ++ // And an int16_t multiply compiles to: ++ // smulbb r1, r1, r0 ++ // asr r2, r1, #16 ++ // cmp r2, r1, asr #15 ++ template <typename V> ++ __attribute__((always_inline)) static bool Do(T x, U y, V* result) { ++ using Promotion = typename FastIntegerArithmeticPromotion<T, U>::type; ++ Promotion presult; ++ ++ presult = static_cast<Promotion>(x) * static_cast<Promotion>(y); ++ *result = static_cast<V>(presult); ++ return IsValueInRangeForNumericType<V>(presult); ++ } ++}; ++ ++template <typename T, typename U> ++struct ClampedAddFastAsmOp { ++ static const bool is_supported = ++ BigEnoughPromotion<T, U>::is_contained && ++ IsTypeInRangeForNumericType< ++ int32_t, ++ typename BigEnoughPromotion<T, U>::type>::value; ++ ++ template <typename V> ++ __attribute__((always_inline)) static V Do(T x, U y) { ++ // This will get promoted to an int, so let the compiler do whatever is ++ // clever and rely on the saturated cast to bounds check. ++ if (IsIntegerArithmeticSafe<int, T, U>::value) ++ return saturated_cast<V>(x + y); ++ ++ int32_t result; ++ int32_t x_i32 = x; ++ int32_t y_i32 = y; ++ ++ asm("qadd %[result], %[first], %[second]" ++ : [result] "=r"(result) ++ : [first] "r"(x_i32), [second] "r"(y_i32)); ++ return saturated_cast<V>(result); ++ } ++}; ++ ++template <typename T, typename U> ++struct ClampedSubFastAsmOp { ++ static const bool is_supported = ++ BigEnoughPromotion<T, U>::is_contained && ++ IsTypeInRangeForNumericType< ++ int32_t, ++ typename BigEnoughPromotion<T, U>::type>::value; ++ ++ template <typename V> ++ __attribute__((always_inline)) static V Do(T x, U y) { ++ // This will get promoted to an int, so let the compiler do whatever is ++ // clever and rely on the saturated cast to bounds check. ++ if (IsIntegerArithmeticSafe<int, T, U>::value) ++ return saturated_cast<V>(x - y); ++ ++ int32_t result; ++ int32_t x_i32 = x; ++ int32_t y_i32 = y; ++ ++ asm("qsub %[result], %[first], %[second]" ++ : [result] "=r"(result) ++ : [first] "r"(x_i32), [second] "r"(y_i32)); ++ return saturated_cast<V>(result); ++ } ++}; ++ ++template <typename T, typename U> ++struct ClampedMulFastAsmOp { ++ static const bool is_supported = CheckedMulFastAsmOp<T, U>::is_supported; ++ ++ template <typename V> ++ __attribute__((always_inline)) static V Do(T x, U y) { ++ // Use the CheckedMulFastAsmOp for full-width 32-bit values, because ++ // it's fewer instructions than promoting and then saturating. ++ if (!IsIntegerArithmeticSafe<int32_t, T, U>::value && ++ !IsIntegerArithmeticSafe<uint32_t, T, U>::value) { ++ V result; ++ if (CheckedMulFastAsmOp<T, U>::Do(x, y, &result)) ++ return result; ++ return CommonMaxOrMin<V>(IsValueNegative(x) ^ IsValueNegative(y)); ++ } ++ ++ assert((FastIntegerArithmeticPromotion<T, U>::is_contained)); ++ using Promotion = typename FastIntegerArithmeticPromotion<T, U>::type; ++ return saturated_cast<V>(static_cast<Promotion>(x) * ++ static_cast<Promotion>(y)); ++ } ++}; ++ ++} // namespace internal ++} // namespace base ++ ++#endif // BASE_NUMERICS_SAFE_MATH_ARM_IMPL_H_ +-- +2.20.0.rc2 + diff --git a/dev-util/gn/gn-0.1479.ebuild b/dev-util/gn/gn-0.1479.ebuild index fc369d2c0db0..89fd565c9595 100644 --- a/dev-util/gn/gn-0.1479.ebuild +++ b/dev-util/gn/gn-0.1479.ebuild @@ -22,6 +22,7 @@ BDEPEND=" PATCHES=( "${FILESDIR}"/gn-gen-r2.patch + "${FILESDIR}"/gn-numerics-arm.patch ) pkg_setup() { |