CVS commit: src/sys/arch/aarch64/aarch64

["Jared D. McNeill" <jmcneill%netbsd.org@localhost>]

Module Name:    src
Committed By:   jmcneill
Date:           Wed Sep 16 11:09:35 UTC 2026

Modified Files:
        src/sys/arch/aarch64/aarch64: fpu.c

Log Message:
arm64: don't consult mvfr1_el1 for AArch64 fp capabilities

The MVFR1_EL1 register describes features for the AArch32 AdvSIMD and FP
implementation and the contents of this register are UNKNOWN when FEAT_AA32
is not implemented.

So let's ignore this register and just set FPCR defaults for IEEE 754
compatibility.

Before this change, 7 tests in lib/libm failed on a VMware Fusion VM
(Apple M4 Pro) where MVFR1_EL1 reads as zero. With this change, all
tests pass.


To generate a diff of this commit:
cvs rdiff -u -r1.14 -r1.15 src/sys/arch/aarch64/aarch64/fpu.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.