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| author |  Mike Klein <mtklein@chromium.org> | 2018-03-10 11:34:53 -0500 |
|---|---|---|
| committer |  Skia Commit-Bot <skia-commit-bot@chromium.org> | 2018-03-14 02:38:52 +0000 |
| commit | d8853ec0fd01ecd45c225aee1f22b3d342dcacd7 (patch) | |
| tree | 671a3ec019016f1f42565b7f99ab3ecf9e140a60 /tests | |
| parent | ba321b601782b4dd7cd060506dcc222ccdaac408 (diff) | |
exact divide by 255 with NEON
Change-Id: Ib121eb0d5af1f22f48f517fe909112a77d92032e
Reviewed-on: https://skia-review.googlesource.com/113666
Commit-Queue: Mike Klein <mtklein@chromium.org>
Reviewed-by: Herb Derby <herb@google.com>
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/MathTest.cpp | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/tests/MathTest.cpp b/tests/MathTest.cpp index 94b15207f7..565f76f819 100644 --- a/tests/MathTest.cpp +++ b/tests/MathTest.cpp @@ -750,3 +750,23 @@ DEF_TEST(DoubleSaturate32, reporter) { REPORTER_ASSERT(reporter, r.fExpectedInt == i); } } + +#if defined(__ARM_NEON) + #include <arm_neon.h> + + DEF_TEST(NeonU16Div255, r) { + + for (int v = 0; v <= 255*255; v++) { + int want = (v + 127)/255; + + uint16x8_t V = vdupq_n_u16(v); + int got = vrshrq_n_u16(vrsraq_n_u16(V, V, 8), 8)[0]; + + if (got != want) { + SkDebugf("%d -> %d, want %d\n", v, got, want); + } + REPORTER_ASSERT(r, got == want); + } + } + +#endif |