On 20 November 2017 at 21:29, Alex Matveev <alxmtvv@xxxxxxxxx> wrote: > On Mon, 20 Nov 2017 15:20:14 +0000 > Mark Rutland <mark.rutland@xxxxxxx> wrote: > >> On Wed, Nov 15, 2017 at 01:34:26PM -0800, Sami Tolvanen wrote: >> > CONFIG_LTO_CLANG requires the use of clang's integrated assembler, >> > which doesn't understand the inline assembly in aes-ce-cipher.c. >> > Disable LTO for the file to work around the issue. >> >> Could you elaborate on what the integrated asembler doesn't like? >> >> It's not entirely clear at a glance, as the asm in that file doesn't >> seem to do anything that obscure. >> >> Is it a bug? > > Turns out, integrated assembler doesn't like this instruction in > aes_sub(): > umov %w[out], v0.4s[0] > > Specifically, it barks at "v0.4s[0]" part. And the way I read the spec, > it's quite correct in not accepting this argument. From UMOV > description: > > UMOV <Wd>, <Vn>.<Ts>[<index>] > > ... > > <Ts> For the 32-bit variant: is an element size specifier, encoded in > the "imm5" field. It can have the following values: > B when imm5 = xxxx1 > H when imm5 = xxx10 > S when imm5 = xx100 > > > With "v0.s[0]" it builds fine. > > Ard, since this is your code, can you comment? Feels like a typo. > Yep. -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
