ed/Odin
1
0
Fork 0
mirror of https://github.com/Ed94/Odin.git synced 2026-06-13 01:21:38 -07:00
Code Issues Packages Projects Releases Wiki Activity

Work around LLVM idiocy.

Browse Source
This commit is contained in:
Jeroen van Rijn
2023-11-04 22:42:32 +01:00
parent 6201280468
commit 4cb0edc90b
3 changed files with 12 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files
core/math/math.odin
+3 -2
View File
@@ -209,8 +209,9 @@ pow2_f64 :: proc(#any_int exp: int) -> (res: f64) {
return transmute(f64)(u64(exp + F64_BIAS) << F64_SHIFT)
case exp < -1075: // Underflow
return f64(0)
case exp == -1075: // Underflow
return 0h00000000_00000001
case exp == -1075: // Underflow.
// Note that pow(2, -1075) returns 0h1 on Windows and 0h0 on macOS & Linux.
return 0h00000000_00000000
case exp < -1022: // Denormal
x := u64(exp + (F64_SHIFT + 1) + F64_BIAS) << F64_SHIFT
return f64(1) / (1 << (F64_SHIFT + 1)) * transmute(f64)x
tests/internal/test_pow
BIN
View File
Binary file not shown.
tests/internal/test_pow.odin
+9 -3
View File
@@ -13,21 +13,27 @@ pow_test :: proc(t: ^testing.T) {
v2 := math.pow2_f64(exp)
_v1 := transmute(u64)v1
_v2 := transmute(u64)v2
expect(t, _v1 == _v2, fmt.tprintf("Expected math.pow2_f64(%d) == math.pow(2, %d) (= %x), got %x", exp, exp, v1, v2))
if exp == -1075 && ODIN_OS == .Windows {
// LLVM on Windows returns 0h00000000_00000001 for pow(2, -1075),
// unlike macOS and Linux where it returns 0h00000000_00000000
// pow2_f64 returns the same float on all platforms because it isn't this stupid
_v1 = 0h00000000_00000000
}
expect(t, _v1 == _v2, fmt.tprintf("Expected math.pow2_f64(%d) == math.pow(2, %d) (= %16x), got %16x", exp, exp, _v1, _v2))
}
{
v1 := math.pow(2, f32(exp))
v2 := math.pow2_f32(exp)
_v1 := transmute(u32)v1
_v2 := transmute(u32)v2
expect(t, _v1 == _v2, fmt.tprintf("Expected math.pow2_f32(%d) == math.pow(2, %d) (= %x), got %x", exp, exp, v1, v2))
expect(t, _v1 == _v2, fmt.tprintf("Expected math.pow2_f32(%d) == math.pow(2, %d) (= %08x), got %08x", exp, exp, _v1, _v2))
}
{
v1 := math.pow(2, f16(exp))
v2 := math.pow2_f16(exp)
_v1 := transmute(u16)v1
_v2 := transmute(u16)v2
expect(t, _v1 == _v2, fmt.tprintf("Expected math.pow2_f16(%d) == math.pow(2, %d) (= %x), got %x", exp, exp, v1, v2))
expect(t, _v1 == _v2, fmt.tprintf("Expected math.pow2_f16(%d) == math.pow(2, %d) (= %04x), got %04x", exp, exp, _v1, _v2))
}
}
}