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tint/sem: Add range overload of Constant::AllZero() 

Checks whether the range of elements are all zero.

Change-Id: I22b91bff25f3fb7fd0e89abd690f139614300e81
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/94328
Reviewed-by: Dan Sinclair <dsinclair@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
This commit is contained in:
Ben Clayton 2022-06-22 10:03:33 +00:00 committed by Dawn LUCI CQ
parent 01cea786e0
commit 1ed376be34
3 changed files with 51 additions and 3 deletions
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5
src/tint/sem/constant.cc
View File

@ -67,10 +67,11 @@ bool Constant::AnyZero() const {
});
}
bool Constant::AllZero() const {
bool Constant::AllZero(size_t start, size_t end) const {
return WithElements([&](auto&& vec) {
using T = typename std::decay_t<decltype(vec)>::value_type;
for (auto el : vec) {
for (size_t i = start; i < end; i++) {
auto el = vec[i];
if (el != T(0) || IsNegativeFloat(el.value)) {
return false;
}

7
src/tint/sem/constant.h
View File

@ -136,11 +136,16 @@ class Constant {
bool AnyZero() const;
/// @returns true if all elements are positive zero
bool AllZero() const;
bool AllZero() const { return AllZero(0, ElementCount()); }
/// @returns true if all elements are the same value, with the same sign-bit.
bool AllEqual() const { return AllEqual(0, ElementCount()); }
/// @param start the first element index
/// @param end one past the last element index
/// @returns true if all elements between `[start, end)` are zero
bool AllZero(size_t start, size_t end) const;
/// @param start the first element index
/// @param end one past the last element index
/// @returns true if all elements between `[start, end)` are the same value

42
src/tint/sem/constant_test.cc
View File

@ -268,6 +268,48 @@ TEST_F(ConstantTest, AllEqual) {
EXPECT_EQ(Constant(vec3_af, {0._a, -0._a, 0._a}).AllEqual(), false);
}
TEST_F(ConstantTest, AllZeroRange) {
auto* vec3_ai = create<Vector>(create<AbstractInt>(), 3u);
EXPECT_EQ(Constant(vec3_ai, {1_a, 2_a, 3_a}).AllZero(1, 3), false);
EXPECT_EQ(Constant(vec3_ai, {0_a, 2_a, 3_a}).AllZero(1, 3), false);
EXPECT_EQ(Constant(vec3_ai, {1_a, 2_a, 3_a}).AllZero(1, 3), false);
EXPECT_EQ(Constant(vec3_ai, {1_a, 2_a, 0_a}).AllZero(1, 3), false);
EXPECT_EQ(Constant(vec3_ai, {0_a, 0_a, 3_a}).AllZero(1, 3), false);
EXPECT_EQ(Constant(vec3_ai, {0_a, 2_a, 0_a}).AllZero(1, 3), false);
EXPECT_EQ(Constant(vec3_ai, {1_a, 0_a, 0_a}).AllZero(1, 3), true);
EXPECT_EQ(Constant(vec3_ai, {1_a, 2_a, 3_a}).AllZero(0, 2), false);
EXPECT_EQ(Constant(vec3_ai, {0_a, 2_a, 3_a}).AllZero(0, 2), false);
EXPECT_EQ(Constant(vec3_ai, {1_a, 2_a, 3_a}).AllZero(0, 2), false);
EXPECT_EQ(Constant(vec3_ai, {1_a, 2_a, 0_a}).AllZero(0, 2), false);
EXPECT_EQ(Constant(vec3_ai, {0_a, 0_a, 3_a}).AllZero(0, 2), true);
EXPECT_EQ(Constant(vec3_ai, {0_a, 2_a, 0_a}).AllZero(0, 2), false);
EXPECT_EQ(Constant(vec3_ai, {1_a, 0_a, 0_a}).AllZero(0, 2), false);
auto* vec3_af = create<Vector>(create<AbstractFloat>(), 3u);
EXPECT_EQ(Constant(vec3_af, {1._a, 2._a, 3._a}).AllZero(1, 3), false);
EXPECT_EQ(Constant(vec3_af, {0._a, 2._a, 3._a}).AllZero(1, 3), false);
EXPECT_EQ(Constant(vec3_af, {1._a, 2._a, 3._a}).AllZero(1, 3), false);
EXPECT_EQ(Constant(vec3_af, {1._a, 2._a, 0._a}).AllZero(1, 3), false);
EXPECT_EQ(Constant(vec3_af, {0._a, 0._a, 3._a}).AllZero(1, 3), false);
EXPECT_EQ(Constant(vec3_af, {0._a, 2._a, 0._a}).AllZero(1, 3), false);
EXPECT_EQ(Constant(vec3_af, {1._a, 0._a, 0._a}).AllZero(1, 3), true);
EXPECT_EQ(Constant(vec3_af, {1._a, -0._a, 0._a}).AllZero(1, 3), false);
EXPECT_EQ(Constant(vec3_af, {1._a, 0._a, -0._a}).AllZero(1, 3), false);
EXPECT_EQ(Constant(vec3_af, {1._a, -0._a, -0._a}).AllZero(1, 3), false);
EXPECT_EQ(Constant(vec3_af, {1._a, 2._a, 3._a}).AllZero(0, 2), false);
EXPECT_EQ(Constant(vec3_af, {0._a, 2._a, 3._a}).AllZero(0, 2), false);
EXPECT_EQ(Constant(vec3_af, {1._a, 2._a, 3._a}).AllZero(0, 2), false);
EXPECT_EQ(Constant(vec3_af, {1._a, 2._a, 0._a}).AllZero(0, 2), false);
EXPECT_EQ(Constant(vec3_af, {0._a, 0._a, 3._a}).AllZero(0, 2), true);
EXPECT_EQ(Constant(vec3_af, {-0._a, 0._a, 1._a}).AllZero(0, 2), false);
EXPECT_EQ(Constant(vec3_af, {0._a, -0._a, 1._a}).AllZero(0, 2), false);
EXPECT_EQ(Constant(vec3_af, {-0._a, -0._a, 1._a}).AllZero(0, 2), false);
EXPECT_EQ(Constant(vec3_af, {0._a, 2._a, 0._a}).AllZero(0, 2), false);
EXPECT_EQ(Constant(vec3_af, {1._a, 0._a, 0._a}).AllZero(0, 2), false);
}
TEST_F(ConstantTest, AllEqualRange) {
auto* vec3_ai = create<Vector>(create<AbstractInt>(), 3u);
EXPECT_EQ(Constant(vec3_ai, {1_a, 2_a, 3_a}).AllEqual(1, 3), false);