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# 8ce1aed5 04-Jul-2024 Slava Zakharin <szakharin@nvidia.com>

[flang] Lower MATMUL to type specific runtime calls. (#97547)

Lower MATMUL to the new runtime entries added in #97406.


Revision tags: llvmorg-18.1.8, llvmorg-18.1.7, llvmorg-18.1.6, llvmorg-18.1.5, llvmorg-18.1.4, llvmorg-18.1.3, llvmorg-18.1.2, llvmorg-18.1.1, llvmorg-18.1.0, llvmorg-18.1.0-rc4, llvmorg-18.1.0-rc3, llvmorg-18.1.0-rc2, llvmorg-18.1.0-rc1, llvmorg-19-init, llvmorg-17.0.6, llvmorg-17.0.5, llvmorg-17.0.4, llvmorg-17.0.3, llvmorg-17.0.2, llvmorg-17.0.1, llvmorg-17.0.0, llvmorg-17.0.0-rc4, llvmorg-17.0.0-rc3, llvmorg-17.0.0-rc2, llvmorg-17.0.0-rc1, llvmorg-18-init, llvmorg-16.0.6, llvmorg-16.0.5, llvmorg-16.0.4, llvmorg-16.0.3, llvmorg-16.0.2, llvmorg-16.0.1, llvmorg-16.0.0, llvmorg-16.0.0-rc4, llvmorg-16.0.0-rc3, llvmorg-16.0.0-rc2, llvmorg-16.0.0-rc1, llvmorg-17-init, llvmorg-15.0.7
# bef2bb34 19-Dec-2022 Tarun Prabhu <tarun@lanl.gov>

[flang] Lowering and runtime support for F08 transformational intrinsics: BESSEL_JN and BESSEL_YN

The runtime implementation uses the recurrence relations

`J(n-1, x) = (2.0 / x) * n * J(n, x) - J(n

[flang] Lowering and runtime support for F08 transformational intrinsics: BESSEL_JN and BESSEL_YN

The runtime implementation uses the recurrence relations

`J(n-1, x) = (2.0 / x) * n * J(n, x) - J(n+1, x)`
`Y(n+1, x) = (2.0 / x) * n * Y(n, x) - Y(n-1, x)`

(see https://dlmf.nist.gov/10.74.iv and https://dlmf.nist.gov/10.6.E1).

Although the standard requires that `N1` and `N2` in `BESSEL_JN(N1, N2, x)`
and `BESSEL_YN(N1, N2, x)` be non-negative, this is not checked in the
runtime functions. This is in keeping with some other compilers which also
return some results when `N1` and/or `N2` are negative.

The special case for `x == 0` is handled in different runtime functions
for each of `BESSEL_JN` and `BESSEL_YN`. The lowering code checks for this
case and inserts the checks and the appropriate runtime calls in FIR.

The existing tests for the two intrinsics was modified to keep the style
consistent with the additional lowering tests that were added.

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Revision tags: llvmorg-15.0.6, llvmorg-15.0.5, llvmorg-15.0.4, llvmorg-15.0.3, working, llvmorg-15.0.2, llvmorg-15.0.1, llvmorg-15.0.0, llvmorg-15.0.0-rc3, llvmorg-15.0.0-rc2, llvmorg-15.0.0-rc1, llvmorg-16-init, llvmorg-14.0.6, llvmorg-14.0.5, llvmorg-14.0.4, llvmorg-14.0.3, llvmorg-14.0.2, llvmorg-14.0.1, llvmorg-14.0.0, llvmorg-14.0.0-rc4, llvmorg-14.0.0-rc3, llvmorg-14.0.0-rc2, llvmorg-14.0.0-rc1, llvmorg-15-init, llvmorg-13.0.1, llvmorg-13.0.1-rc3, llvmorg-13.0.1-rc2
# 18452d1f 29-Nov-2021 Valentin Clement <clementval@gmail.com>

[fir] Add fir transformational intrinsic builder

This patch adds the builder to generate transformational
intrinsic runtime API calls.

This patch is part of the upstreaming effort from fir-dev bran

[fir] Add fir transformational intrinsic builder

This patch adds the builder to generate transformational
intrinsic runtime API calls.

This patch is part of the upstreaming effort from fir-dev branch.

Reviewed By: rovka

Differential Revision: https://reviews.llvm.org/D114470

Co-authored-by: Jean Perier <jperier@nvidia.com>
Co-authored-by: mleair <leairmark@gmail.com>
Co-authored-by: Kiran Chandramohan <kiran.chandramohan@arm.com>
Co-authored-by: Peter Steinfeld <psteinfeld@nvidia.com>

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