Re: [Qemu-devel] [Qemu-arm] [PATCH v6 00/35] target/arm SVE patches

["Alex Bennée" <alex.bennee@linaro.org>]

Peter Maydell <peter.maydell@linaro.org> writes:

> On 28 June 2018 at 12:30, Alex Bennée <alex.bennee@linaro.org> wrote:
>>
>> Richard Henderson <richard.henderson@linaro.org> writes:
>>
>>> This is the remainder of the SVE enablement patches,
>>> with an extra bonus patch to enable ARMv8.2-DotProd.
>>>
>>> V6 updates based on review.
>>
>> One failure from the VQ3 test set:
>>
>> ../qemu.git/aarch64-linux-user/qemu-aarch64 \
>>   ./risu --test-sve=3 \
>>   sve-all-short-v8.3+sve@vq3/insn_sdiv_z_p_zz___INC.risu.bin \
>>   --trace=sve-all-short-v8.3+sve@vq3/insn_sdiv_z_p_zz___INC.risu.bin.trace
>>
>> Gives:
>>
>>   loading test image
>>   sve-all-short-v8.3+sve@vq3/insn_sdiv_z_p_zz___INC.risu.bin...
>>   starting apprentice image at 0x4000801000
>>   starting image
>>   fish: “../qemu.git/aarch64-linux-user/…” terminated by signal SIGFPE
>>   (Floating point exception)
>
> Do you have the insn that it's barfing on? In particular,
> I'm guessing from the test name that this is for something
> covered by one of the SDIV_zpzz lines in sve.decode, which
> is already in master rather than in this test series.
> If that's true, then it shouldn't block applying this set...

#0  0x000055555569297f in helper_sve_sdiv_zpzz_s (vd=0x555557a522e0, vn=0x555557a522e0, vm=0x555557a51fe0, vg=0x555557a52be0, desc=<optimised out>) at /home/alex/lsrc/qemu/qemu.git/target/arm/sve_helper.c:480
#1  0x0000555555b1283f in static_code_gen_buffer ()
#2  0x00005555555ea0d8 in cpu_tb_exec (itb=<optimised out>, cpu=0x555557a50320) at /home/alex/lsrc/qemu/qemu.git/accel/tcg/cpu-exec.c:171
#3  cpu_loop_exec_tb (tb_exit=<synthetic pointer>, last_tb=<synthetic pointer>, tb=<optimised out>, cpu=0x555557a50320) at /home/alex/lsrc/qemu/qemu.git/accel/tcg/cpu-exec.c:612
#4  cpu_exec (cpu=cpu@entry=0x555557a48070) at /home/alex/lsrc/qemu/qemu.git/accel/tcg/cpu-exec.c:722
#5  0x000055555560ad40 in cpu_loop (env=0x555557a50320) at /home/alex/lsrc/qemu/qemu.git/linux-user/aarch64/cpu_loop.c:82
#6  0x00005555555afb0c in main (argc=<optimised out>, argv=0x7fffffffdea8, envp=<optimised out>) at /home/alex/lsrc/qemu/qemu.git/linux-user/main.c:813
#0  0x000055555569297f in helper_sve_sdiv_zpzz_s (vd=0x555557a522e0, vn=0x555557a522e0, vm=0x555557a51fe0, vg=0x555557a52be0, desc=<optimised out>) at /home/alex/lsrc/qemu/qemu.git/target/arm/sve_helper.c:480
480	DO_ZPZZ(sve_sdiv_zpzz_s, int32_t, H1_4, DO_DIV)
=> 0x55555569297f <helper_sve_sdiv_zpzz_s+63>:	idiv   %r10d
   0x555555692982 <helper_sve_sdiv_zpzz_s+66>:	mov    %eax,%r11d
   0x555555692985 <helper_sve_sdiv_zpzz_s+69>:	mov    %r11d,(%rdi,%r8,1)
   0x555555692989 <helper_sve_sdiv_zpzz_s+73>:	add    $0x4,%r8
   0x55555569298d <helper_sve_sdiv_zpzz_s+77>:	shr    $0x4,%r9w
A syntax error in expression, near `./ $r10d'.

r10d $6 = 0xffffffff
rax $7 = 0x80000000
rdx $8 = 0xffffffff

Yeah so from something already merged in.

--
Alex Bennée