Displaying 4 results from an estimated 4 matches for "07a2".
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2009 Apr 30
2
NA_real_ <op> NaN -> NA or NaN, should we care?
...NA for both answers.
On Linux, after compiling src/main/arithmetic.c with -g -O2 the bit
patterns for NA_real_ and as.numeric(NA) are different:
> my_numeric_NA <- as.numeric(NA)
> writeBin(my_numeric_NA, ptmp<-pipe("od -x", open="wb"));close(ptmp)
0000000 07a2 0000 0000 7ff8
0000010
> writeBin(NA_real_, ptmp<-pipe("od -x", open="wb"));close(ptmp)
0000000 07a2 0000 0000 7ff0
0000010
On Linux, after compiling with -g the bit patterns for NA_real_
and as.numeric(NA) are identical.
> my_numeric_NA <- as.numeric...
2017 Oct 29
3
Problem with graphics on latest CentOS 6
...ng to report. Here is the relevant system information:
Linux ssg003.bose.com 2.6.32-696.13.2.el6.i686 #1 SMP Thu Oct 5 20:42:25 UTC 2017 i686 i686 i386 GNU/Linux
00:02.0 VGA compatible controller: Intel Corporation Device 5912 (rev 04) (prog-if 00 [VGA controller])
Subsystem: Dell Device 07a2
Flags: bus master, fast devsel, latency 0, IRQ 11
Memory at f6000000 (64-bit, non-prefetchable) [size=16M]
Memory at e0000000 (64-bit, prefetchable) [size=256M]
I/O ports at f000 [size=64]
Expansion ROM at <unassigned> [disabled]
Capabilities: [...
2023 Feb 23
2
Possible NA Propagation Failure in RISC-V64 CPU?
...-/* throw it to the hardware to handle.
However, the RISC-V64 CPU does not behave as expected, at least the CPU I
am using (Starfive JH7100-7110).
Here are the relevant bit patterns. From my understanding, as IEEE only
regulates the bit patterns of NaN, R picks one of the bit patterns (ending
with 07a2) and declares it as NA.
# print_hex is a function to print the bit pattern in hex
> print_hex(0.1)
3fb999999999999a # same for RISC-V
> print_hex(NaN)
7ff8000000000000 # same for RISC-V
> print_hex(NA)
7ff00000000007a2 # same for RISC-V
> print_hex(NA+1)
7ff80000000007a2 # 7ff800000000...
2017 Oct 30
0
Problem with graphics on latest CentOS 6
...he relevant system information:
>
> Linux ssg003.bose.com 2.6.32-696.13.2.el6.i686 #1 SMP Thu Oct 5 20:42:25 UTC 2017 i686 i686 i386 GNU/Linux
>
> 00:02.0 VGA compatible controller: Intel Corporation Device 5912 (rev 04) (prog-if 00 [VGA controller])
> Subsystem: Dell Device 07a2
> Flags: bus master, fast devsel, latency 0, IRQ 11
> Memory at f6000000 (64-bit, non-prefetchable) [size=16M]
> Memory at e0000000 (64-bit, prefetchable) [size=256M]
> I/O ports at f000 [size=64]
> Expansion ROM at <unassigned> [disabled]
>...