diff options
Diffstat (limited to 'gnu/packages')
| -rw-r--r-- | gnu/packages/maths.scm | 3 | ||||
| -rw-r--r-- | gnu/packages/patches/fp16-implicit-double.patch | 23 |
2 files changed, 25 insertions, 1 deletions
diff --git a/gnu/packages/maths.scm b/gnu/packages/maths.scm index ffd2a89d2f..83ce3256df 100644 --- a/gnu/packages/maths.scm +++ b/gnu/packages/maths.scm @@ -7690,7 +7690,8 @@ when an application performs repeated divisions by the same divisor.") (sha256 (base32 "05mm4vrxsac35hjf5djif9r6rdxj9ippg97ia3p6q6b8lrp7srwv")) - (patches (search-patches "fp16-system-libraries.patch")))) + (patches (search-patches "fp16-implicit-double.patch" + "fp16-system-libraries.patch")))) (build-system cmake-build-system) (arguments `(#:imported-modules ((guix build python-build-system) 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; |