On 1/13/22 10:50, Ben Grasset via fpc-devel wrote:
On Thu, Jan 13, 2022 at 1:25 AM Nikolay Nikolov via fpc-devel
<fpc-devel@lists.freepascal.org> wrote:
We do care about scientific code as well as fast code, that's why
we support both the FPU and SSE2+ (as well as AVX, etc.).
FPC *chooses *not to generate x87 FPU instructions on 64-bit Windows
solely because "it's deprecated". There's no actual technical
limitation in play for user-mode code as far as the OS support for it
goes.
What do other win64 compilers do? Do they generate x87 FPU code for
64-bit Windows?
On Thu, Jan 13, 2022 at 1:25 AM Nikolay Nikolov via fpc-devel
<fpc-devel@lists.freepascal.org> wrote:
Floating point precision bugs, caused by loss of precision are
evil, because the code works most of the time during testing, but
they can still cause intermittent faults, which can be
catastrophic. Ariane 5 is a notable example.
I don't disagree with you, but you're missing my point, which is that
there's trivial solutions for this other than mandating the use of an
entirely 32-bit bit toolchain even for the common user who just wants
to use a 64-bit toolchain to generate 64-bit applications on their own
64-bit operating system.
Simply dropping a 32-bit copy of ppc386.exe into the bin folder of an
otherwise all-64-bit FPC installation is all that's needed be able to
build the 32-bit RTL and packages, and then start building 32-bit
programs, for example.
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