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kalsprite
2026-08-15 22:44:52 -07:00
parent e53fc6a879
commit 5f0251fec2
2 changed files with 36 additions and 10 deletions
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33
tests/internal/test_simd_lane_counts.odin
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@@ -170,3 +170,36 @@ simd_pairwise_aliases_are_distinct :: proc(t: ^testing.T) {
testing.expect_value(t, intrinsics.simd_extract(sub, 0), i32(7))
testing.expect_value(t, intrinsics.simd_extract(sub, 1), i32(16))
}
// The rotate offset is declared `$offset: int`; the checker demanded `i64`, so the declared
// spelling did not compile. Other integer types stay rejected -- the declaration is not #any_int.
@(test)
simd_lanes_rotate_offset_is_int :: proc(t: ^testing.T) {
rot :: proc(v: #simd[4]u32, $offset: int) -> #simd[4]u32 {
return intrinsics.simd_lanes_rotate_right(v, offset)
}
v: #simd[4]u32 = {0, 1, 2, 3}
r := rot(v, 1)
testing.expect_value(t, intrinsics.simd_extract(r, 0), u32(3))
testing.expect_value(t, intrinsics.simd_extract(r, 1), u32(0))
l := intrinsics.simd_lanes_rotate_left(v, 1)
testing.expect_value(t, intrinsics.simd_extract(l, 0), u32(1))
testing.expect_value(t, intrinsics.simd_extract(l, 3), u32(0))
}
// `simd_extract` / `simd_replace` declare a plain `idx: uint`, so a runtime index is allowed and
// lowers to a dynamic extractelement. Bounds are enforced only where the index is constant.
@(test)
simd_extract_accepts_a_runtime_index :: proc(t: ^testing.T) {
v: #simd[4]u32 = {10, 20, 30, 40}
i := 2
testing.expect_value(t, intrinsics.simd_extract(v, i), u32(30))
w := intrinsics.simd_replace(v, i, u32(99))
testing.expect_value(t, intrinsics.simd_extract(w, 2), u32(99))
testing.expect_value(t, intrinsics.simd_extract(w, 0), u32(10))
}