c00db97159
This patch implements `__builtin_elementwise_add_sat` and `__builtin_elementwise_sub_sat` builtins. These map to the add/sub saturated math intrinsics described here: https://llvm.org/docs/LangRef.html#saturation-arithmetic-intrinsics With this in place we should then be able to replace the x86 SSE adds/subs intrinsics with these generic variants - it looks like other targets should be able to use these as well (arm/aarch64/webassembly all have similar examples in cgbuiltin). Differential Revision: https://reviews.llvm.org/D117898
62 lines
2.0 KiB
C++
62 lines
2.0 KiB
C++
// RUN: %clang_cc1 %s -std=c++17 -pedantic -verify -triple=x86_64-apple-darwin9
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// Simple is_const implementation.
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struct true_type {
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static const bool value = true;
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};
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struct false_type {
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static const bool value = false;
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};
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template <class T> struct is_const : false_type {};
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template <class T> struct is_const<const T> : true_type {};
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// expected-no-diagnostics
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void test_builtin_elementwise_abs() {
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const int a = 2;
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int b = 1;
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static_assert(!is_const<decltype(__builtin_elementwise_abs(a))>::value);
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static_assert(!is_const<decltype(__builtin_elementwise_abs(b))>::value);
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}
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void test_builtin_elementwise_add_sat() {
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const int a = 2;
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int b = 1;
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static_assert(!is_const<decltype(__builtin_elementwise_add_sat(a, b))>::value);
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static_assert(!is_const<decltype(__builtin_elementwise_add_sat(b, a))>::value);
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static_assert(!is_const<decltype(__builtin_elementwise_add_sat(a, a))>::value);
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}
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void test_builtin_elementwise_sub_sat() {
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const int a = 2;
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int b = 1;
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static_assert(!is_const<decltype(__builtin_elementwise_sub_sat(a, b))>::value);
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static_assert(!is_const<decltype(__builtin_elementwise_sub_sat(b, a))>::value);
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static_assert(!is_const<decltype(__builtin_elementwise_sub_sat(a, a))>::value);
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}
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void test_builtin_elementwise_max() {
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const int a = 2;
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int b = 1;
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static_assert(!is_const<decltype(__builtin_elementwise_max(a, b))>::value);
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static_assert(!is_const<decltype(__builtin_elementwise_max(b, a))>::value);
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static_assert(!is_const<decltype(__builtin_elementwise_max(a, a))>::value);
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}
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void test_builtin_elementwise_min() {
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const int a = 2;
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int b = 1;
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static_assert(!is_const<decltype(__builtin_elementwise_min(a, b))>::value);
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static_assert(!is_const<decltype(__builtin_elementwise_min(b, a))>::value);
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static_assert(!is_const<decltype(__builtin_elementwise_min(a, a))>::value);
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}
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void test_builtin_elementwise_ceil() {
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const float a = 42.0;
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float b = 42.3;
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static_assert(!is_const<decltype(__builtin_elementwise_ceil(a))>::value);
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static_assert(!is_const<decltype(__builtin_elementwise_ceil(b))>::value);
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}
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