fundal_weno5_recon_compdot

Source: src/third_party/FUNDAL/src/tests/precision/fundal_weno5_recon_compdot.F90

Dependencies

Contents

• two_prod
• two_sum
• weno5_recon_r4_compdot

Subroutines

two_prod

Veltkamp split + Dekker TwoProd, FP32, no FMA dependency. Returns (hi, lo) such that ab = hi + lo exactly in unbounded precision, with hi = fl(ab) and lo the exact rounding error.

Attributes: pure

subroutine two_prod(a, b, hi, lo)

Arguments

Name	Type	Intent	Attributes	Description
a	real(kind=R4P)	in
b	real(kind=R4P)	in
hi	real(kind=R4P)	out
lo	real(kind=R4P)	out

Call graph

two_sum

Knuth/Moller TwoSum, FP32, branchless. Returns (s, e) such that a + b = s + e exactly, with s = fl(a + b).

Attributes: pure

subroutine two_sum(a, b, s, e)

Arguments

Name	Type	Intent	Attributes	Description
a	real(kind=R4P)	in
b	real(kind=R4P)	in
s	real(kind=R4P)	out
e	real(kind=R4P)	out

Call graph

Functions

weno5_recon_r4_compdot

WENO5-JS reconstruction at i+1/2 from the left with compensated final dot.

Attributes: pure

Returns: real(kind=R4P)

function weno5_recon_r4_compdot(vm2, vm1, v0, vp1, vp2) result(vL)

Arguments

Name	Type	Intent	Attributes	Description
vm2	real(kind=R4P)	in
vm1	real(kind=R4P)	in
v0	real(kind=R4P)	in
vp1	real(kind=R4P)	in
vp2	real(kind=R4P)	in

Call graph