github_mirrors/vectorscan
3
0
Fork 1
mirror of https://github.com/VectorCamp/vectorscan.git synced 2025-09-29 19:24:25 +03:00
Code Issues Packages Projects Releases Wiki Activity

If we can shift by an immediate, do it. Otherwise, don't.

Browse Source
This commit is contained in:
Matthew Barr
2017-05-16 11:05:53 +10:00
parent 0275869b3e
commit 3e345c2567
4 changed files with 92 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

54
unit/internal/simd_utils.cpp
View File

@@ -143,6 +143,10 @@ void simd_loadbytes(m128 *a, const void *ptr, unsigned i) { *a = loadbytes128(pt
void simd_loadbytes(m256 *a, const void *ptr, unsigned i) { *a = loadbytes256(ptr, i); }
void simd_loadbytes(m384 *a, const void *ptr, unsigned i) { *a = loadbytes384(ptr, i); }
void simd_loadbytes(m512 *a, const void *ptr, unsigned i) { *a = loadbytes512(ptr, i); }
m128 simd_lshift64(const m128 &a, unsigned i) { return lshift64_m128(a, i); }
m256 simd_lshift64(const m256 &a, unsigned i) { return lshift64_m256(a, i); }
m384 simd_lshift64(const m384 &a, unsigned i) { return lshift64_m384(a, i); }
m512 simd_lshift64(const m512 &a, unsigned i) { return lshift64_m512(a, i); }
template<typename T>
class SimdUtilsTest : public testing::Test {
@@ -586,6 +590,56 @@ TYPED_TEST(SimdUtilsTest, loadbytes_storebytes) {
}
}
TYPED_TEST(SimdUtilsTest, lshift64) {
TypeParam a;
memset(&a, 0x5a, sizeof(a));
static constexpr u64a exp_val = 0x5a5a5a5a5a5a5a5aULL;
union {
TypeParam simd;
u64a qword[sizeof(TypeParam) / 8];
} c;
cout << "non-const for size " << sizeof(a) << '\n';
for (unsigned s = 0; s < 64; s++) {
c.simd = simd_lshift64(a, s);
const u64a expected = exp_val << s;
for (size_t i = 0; i < sizeof(c) / 8; i++) {
EXPECT_EQ(expected, c.qword[i]);
}
}
// test immediates
u64a expected;
cout << "imm for size " << sizeof(a) << '\n';
c.simd = simd_lshift64(a, 1);
expected = exp_val << 1;
for (size_t i = 0; i < sizeof(c) / 8; i++) {
EXPECT_EQ(expected, c.qword[i]);
}
c.simd = simd_lshift64(a, 2);
expected = exp_val << 2;
for (size_t i = 0; i < sizeof(c) / 8; i++) {
EXPECT_EQ(expected, c.qword[i]);
}
c.simd = simd_lshift64(a, 7);
expected = exp_val << 7;
for (size_t i = 0; i < sizeof(c) / 8; i++) {
EXPECT_EQ(expected, c.qword[i]);
}
c.simd = simd_lshift64(a, 31);
expected = exp_val << 31;
for (size_t i = 0; i < sizeof(c) / 8; i++) {
EXPECT_EQ(expected, c.qword[i]);
}
}
TEST(SimdUtilsTest, alignment) {
ASSERT_EQ(16, alignof(m128));
ASSERT_EQ(32, alignof(m256));