diff options
Diffstat (limited to 'tests/SkNxTest.cpp')
-rw-r--r-- | tests/SkNxTest.cpp | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/tests/SkNxTest.cpp b/tests/SkNxTest.cpp index 5509814c07..51d937dd4d 100644 --- a/tests/SkNxTest.cpp +++ b/tests/SkNxTest.cpp @@ -288,3 +288,22 @@ DEF_TEST(SkNx_u16_float, r) { REPORTER_ASSERT(r, !memcmp(s16, d16, sizeof(s16))); } } + +// The SSE2 implementation of SkNx_cast<uint16_t>(Sk4i) is non-trivial, so worth a test. +DEF_TEST(SkNx_int_u16, r) { + // These are pretty hard to get wrong. + for (int i = 0; i <= 0x7fff; i++) { + uint16_t expected = (uint16_t)i; + uint16_t actual = SkNx_cast<uint16_t>(Sk4i(i))[0]; + + REPORTER_ASSERT(r, expected == actual); + } + + // A naive implementation with _mm_packs_epi32 would succeed up to 0x7fff but fail here: + for (int i = 0x8000; (1) && i <= 0xffff; i++) { + uint16_t expected = (uint16_t)i; + uint16_t actual = SkNx_cast<uint16_t>(Sk4i(i))[0]; + + REPORTER_ASSERT(r, expected == actual); + } +} |