mirrors/Odin
1
0
Fork 0
mirror of https://github.com/odin-lang/Odin.git synced 2026-02-13 06:43:35 +00:00
Code Issues Packages Projects Releases Wiki Activity

Fix fls_uint

Browse Source
This commit is contained in:
Jeroen van Rijn
2024-06-06 14:42:19 +02:00
parent 0b6d73c86e
commit 72f6b5479d
2 changed files with 49 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
core/mem/tlsf/tlsf_internal.odin
View File

@@ -126,10 +126,14 @@ ffs :: proc "contextless" (word: u32) -> (bit: i32) {
fls :: proc "contextless" (word: u32) -> (bit: i32) {
return i32(31 - intrinsics.count_leading_zeros(word))
}
@(require_results)
fls_uint :: proc "contextless" (size: uint) -> (bit: i32) {
N :: size_of(uintptr)-1
return i32(N - intrinsics.count_leading_zeros(size))
when size_of(uintptr) == 8 {
@(require_results)
fls_uint :: proc "contextless" (size: uint) -> (bit: i32) {
return i32(63 - intrinsics.count_leading_zeros(size))
}
} else {
fls_uint :: fls_u32
}
@(require_results)

41
tests/core/mem/test_core_mem.odin Normal file
View File

@@ -0,0 +1,41 @@
package test_core_mem
import "core:mem/tlsf"
import "core:testing"
@test
test_tlsf_bitscan :: proc(t: ^testing.T) {
Vector :: struct {
op: enum{ffs, fls, fls_uint},
v: union{u32, uint},
exp: i32,
}
Tests := []Vector{
{.ffs, u32 (0x0000_0000_0000_0000), -1},
{.ffs, u32 (0x0000_0000_0000_0000), -1},
{.fls, u32 (0x0000_0000_0000_0000), -1},
{.ffs, u32 (0x0000_0000_0000_0001), 0},
{.fls, u32 (0x0000_0000_0000_0001), 0},
{.ffs, u32 (0x0000_0000_8000_0000), 31},
{.ffs, u32 (0x0000_0000_8000_8000), 15},
{.fls, u32 (0x0000_0000_8000_0008), 31},
{.fls, u32 (0x0000_0000_7FFF_FFFF), 30},
{.fls_uint, uint(0x0000_0000_8000_0000), 31},
{.fls_uint, uint(0x0000_0001_0000_0000), 32},
{.fls_uint, uint(0xffff_ffff_ffff_ffff), 63},
}
for test in Tests {
switch test.op {
case .ffs:
res := tlsf.ffs(test.v.?)
testing.expectf(t, res == test.exp, "Expected tlsf.ffs(0x%08x) == %v, got %v", test.v, test.exp, res)
case .fls:
res := tlsf.fls(test.v.?)
testing.expectf(t, res == test.exp, "Expected tlsf.fls(0x%08x) == %v, got %v", test.v, test.exp, res)
case .fls_uint:
res := tlsf.fls_uint(test.v.?)
testing.expectf(t, res == test.exp, "Expected tlsf.fls_uint(0x%16x) == %v, got %v", test.v, test.exp, res)
}
}
}