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Another transmute tweak. (#610) 

* Another transmute tweak.

* Changelog tweak.
This commit is contained in:
Laurent Mazare 2023-08-26 13:00:24 +01:00 committed by GitHub
parent 06b37ea7ad
commit fdf15f0e05
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2 changed files with 21 additions and 20 deletions
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2
CHANGELOG.md
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@ -3,6 +3,8 @@ This documents the main changes to the `candle` crate.
## Unreleased
### Added
- Support more quantized types, e.g. Q2K, Q4K, Q5K...
[586](https://github.com/huggingface/candle/pull/586).
- Add pose estimation to the yolo example
[589](https://github.com/huggingface/candle/pull/589).
- Api to write GGUF files

13
candle-core/src/quantized/k_quants.rs
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@ -651,7 +651,6 @@ impl GgmlType for BlockQ3K {
let mut aux32: [i32; 8] = [0; 8];
let mut auxs: [u32; 4] = [0; 4];
let mut scales: &[i8; 16];
for (x, y) in xs.iter().zip(ys.iter()) {
let mut q3: &[u8] = &x.qs;
@ -728,14 +727,14 @@ impl GgmlType for BlockQ3K {
auxs[0] = (auxs[0] & KMASK2) | (((tmp) & KMASK1) << 4);
auxs[1] = (auxs[1] & KMASK2) | (((tmp >> 2) & KMASK1) << 4);
scales = unsafe { std::mem::transmute::<&mut [u32; 4], &mut [i8; 16]>(&mut auxs) };
for scale in scales {
for aux in auxs {
for scale in aux.to_le_bytes() {
let scale = i8::from_be_bytes([scale]);
for l in 0..8 {
aux16[l] = q8[l] as i16 * a[l] as i16;
}
for l in 0..8 {
aux32[l] += (*scale as i32 - 32) * aux16[l] as i32;
aux32[l] += (scale as i32 - 32) * aux16[l] as i32;
}
q8 = &q8[8..];
a = &mut a[8..];
@ -744,12 +743,12 @@ impl GgmlType for BlockQ3K {
aux16[l] = q8[l] as i16 * a[l] as i16;
}
for l in 0..8 {
aux32[l] += (*scale as i32 - 32) * aux16[l] as i32;
aux32[l] += (scale as i32 - 32) * aux16[l] as i32;
}
q8 = &q8[8..];
a = &mut a[8..];
}
}
let d = x.d.to_f32() * y.d;
for l in 0..8 {
sums[l] += d * aux32[l] as f32;