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| author | Marius Bakke <marius@gnu.org> | 2022-10-15 23:25:42 +0200 |
|---|---|---|
| committer | Marius Bakke <marius@gnu.org> | 2022-10-15 23:26:59 +0200 |
| commit | d799c8a5f666bf2b909a19b065a5651778731936 (patch) | |
| tree | 60e570af81227c3c0e30553182408a3e59c0ebf4 /gnu/packages/patches | |
| parent | 5d58d2068423e2358044737fc27e5c4b875a5d20 (diff) | |
| download | guix-d799c8a5f666bf2b909a19b065a5651778731936.tar guix-d799c8a5f666bf2b909a19b065a5651778731936.tar.gz | |
gnu: fp16: Fix build on i686-linux.
* gnu/packages/patches/fp16-implicit-double.patch: New file.
* gnu/local.mk (dist_patch_DATA): Adjust accordingly.
* gnu/packages/maths.scm (fp16)[source](patches): Add it.
Diffstat (limited to 'gnu/packages/patches')
| -rw-r--r-- | gnu/packages/patches/fp16-implicit-double.patch | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/gnu/packages/patches/fp16-implicit-double.patch b/gnu/packages/patches/fp16-implicit-double.patch new file mode 100644 index 0000000000..87ed9a6a53 --- /dev/null +++ b/gnu/packages/patches/fp16-implicit-double.patch @@ -0,0 +1,23 @@ +Prevent implicit conversion of float to double to avoid precision +error on i686. + + https://github.com/Maratyszcza/FP16/issues/20 + +Taken from Debian: + + https://salsa.debian.org/deeplearning-team/fp16/-/blob/master/debian/patches/ftbfs-i386.patch + +Index: fp16/include/fp16/fp16.h +=================================================================== +--- fp16.orig/include/fp16/fp16.h ++++ fp16/include/fp16/fp16.h +@@ -228,7 +228,8 @@ static inline uint16_t fp16_ieee_from_fp + const float scale_to_inf = fp32_from_bits(UINT32_C(0x77800000)); + const float scale_to_zero = fp32_from_bits(UINT32_C(0x08800000)); + #endif +- float base = (fabsf(f) * scale_to_inf) * scale_to_zero; ++ const volatile float base_inf = fabsf(f) * scale_to_inf; ++ float base = base_inf * scale_to_zero; + + const uint32_t w = fp32_to_bits(f); + const uint32_t shl1_w = w + w; |