Re: port-mips/57680: printf("%.1f") shows wrong results on R3000mipseb

[Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>]

The following reply was made to PR port-mips/57680; it has been noted by GNATS.

From: Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>
To: rvp%SDF.ORG@localhost
Cc: gnats-bugs%netbsd.org@localhost, tsutsui%ceres.dti.ne.jp@localhost
Subject: Re: port-mips/57680: printf("%.1f") shows wrong results on R3000mipseb
Date: Fri, 3 Nov 2023 20:38:45 +0900

 > > Can you show the output of this program? (Instructions in source)
 > > 
 > > ```
 > > /**
 > >   * Little-Endian 32-bit:
 > >   * cc -I/usr/src/lib/libc/gdtoa/ -I/usr/src/lib/libc/arch/i386/gdtoa/ \
 > >   *   -DDEBUG -DHonor_FLT_ROUNDS -DNO_LONG_LONG -o m \
 > >   *   m.c /usr/src/lib/libc/gdtoa/dtoa.c /usr/src/lib/libc/gdtoa/dmisc.c
 > >   *
 > >   * Big-Endian 32-bit:
 > >   * cc -I/usr/src/lib/libc/gdtoa/ -I/usr/src/lib/libc/arch/mips/gdtoa/ \
 > >   *   -DDEBUG -DHonor_FLT_ROUNDS -DNO_LONG_LONG -o m \
 > >   *   m.c /usr/src/lib/libc/gdtoa/dtoa.c /usr/src/lib/libc/gdtoa/dmisc.c
 > >   */
 > 
 > I have not tried this yet, but git bisect shows
 
 Now I've tried it on both NWS-3470 (R3000 + R3010) and NWS-5000 (R4400):
 
 On NWS-3470:
 ---
 news3470-% cc -I/s/netbsd-9/src/lib/libc/gdtoa/ -I/s/netbsd-9/src/lib/libc/arch/mips/gdtoa/ -DDEBUG -DHonor_FLT_ROUNDS -DNO_LONG_LONG -o m m.c /s/netbsd-9/src/lib/libc/gdtoa/gdtoa.c /s/netbsd-9/src/lib/libc/gdtoa/dmisc.c
 news3470-% ./m
 .O
 40490FD0
 3.0
 439D145A
 ?.0
 44C45970
 news3470-% grep ^cpu0 /var/run/dmesg.boot 
 cpu0 at mainbus0: MIPS R3000 CPU (0x220) Rev. 2.0 with MIPS R3010 FPC Rev. 2.0
 cpu0: 64KB/4B direct-mapped Instruction cache, 64 TLB entries
 cpu0: 64KB/4B direct-mapped write-through Data cache
 news3470-%
 ---
 
 On NWS-5000:
 ---
 (copy the above "m" binary from NWS-3470)
 news5000-% ./m
 3.1
 40490FD0
 314.1
 439D145A
 1570.7
 44C45970
 news5000-% % grep ^cpu0 /var/run/dmesg.boot
 cpu0 at mainbus0: MIPS R4400 CPU (0x450) Rev. 5.0 with MIPS R4010 FPC Rev. 0.0
 cpu0: 48 TLB entries, 16MB max page size
 cpu0: 16KB/16B direct-mapped L1 instruction cache
 cpu0: 16KB/16B direct-mapped write-back L1 data cache
 cpu0: 1024KB/64B direct-mapped write-back L2 unified cache
 news5000-% 
 
 ---
 Izumi Tsutsui