linux-kernel - Re: [PATCH] ARCv2: build: use mcpu=hs38 iso generic mcpu=archs

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Message-ID: <C2D7FE5348E1B147BCA15975FBA23075012B0949BC@us01wembx1.internal.synopsys.com>
Date:   Wed, 12 Sep 2018 17:06:25 +0000
From:   Vineet Gupta <Vineet.Gupta1@...opsys.com>
To:     Guenter Roeck <linux@...ck-us.net>
CC:     Claudiu Zissulescu <Claudiu.Zissulescu@...opsys.com>,
        "linux-snps-arc@...ts.infradead.org" 
        <linux-snps-arc@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ARCv2: build: use mcpu=hs38 iso generic mcpu=archs

On 09/12/2018 09:58 AM, Guenter Roeck wrote:
> Hi,
>
> On Fri, Sep 07, 2018 at 03:13:10PM -0700, Vineet Gupta wrote:
>> helps gcc with better instruction selections such as 64-bit multiply MPYD
>>
>> before
>> ------
>> 82c34b58 <sched_clock>:
>> 82c34b58:	ld	r2,[0x83068d00]
>> 82c34b60:	add_s	r2,r2,0x7530
>> 82c34b66:	mov_s	r0,0x989680
>> 82c34b6c:	mpymu	r5,r2,r0
>> 82c34b70:	mpy	r4,r2,r0
>> 82c34b74:	mov_s	r0,r4
>> 82c34b76:	j_s.d	[blink]
>> 82c34b78:	mov_s	r1,r5
>> 82c34b7a:	nop_s
>>
>> after
>> ------
>> 82c34b7c <sched_clock>:
>> 82c34b7c:	ld	r0,[0x83064d00]
>> 82c34b84:	add_s	r0,r0,0x7530
>> 82c34b8a:	mpydu	r0,r0,0x989680
>> 82c34b92:	j_s	[blink]
>>
>> Signed-off-by: Vineet Gupta <vgupta@...opsys.com>
> This patch causes my arc2 test builds to fail
>
> Building arc:axs103_defconfig ... failed
> --------------
> Error log:
>
> standard input}: Assembler messages:
> {standard input}:154: Error: inappropriate arguments for opcode 'st'
> {standard input}:157: Error: Insn j_s has a jump/branch instruction j_s in its delay slot.
> {standard input}:186: Error: inappropriate arguments for opcode 'st'
> make[3]: *** [net/core/dev.o] Error 1
> make[2]: *** [net/core] Error 2
>
> Building arc:nsim_hs_smp_defconfig ... failed
> --------------
> Error log:
> {standard input}: Assembler messages:
> {standard input}:218: Error: inappropriate arguments for opcode 'st'
> {standard input}:9329: Error: inappropriate arguments for opcode 'st'
>
> Building arc:vdk_hs38_smp_defconfig ... failed
> --------------
> Error log:
>
> {standard input}: Assembler messages:
> {standard input}:9629: Error: inappropriate arguments for opcode 'st'
> {standard input}:9883: Error: inappropriate arguments for opcode 'st'
>
> I use a toolchain based on gcc 7.3.0 and binutils 2.30. What version
> of gcc and binutils do I need for the builds to complete ?

Hmm I have a prebuilt 2017.03 release of tools (gcc 7.1.1 based) and I don't see
the issue above when building net/core/dev.o
I presume your toolchain was built off of upstream gcc sources.
Can you please post the output of your arc-linux*gcc -v

Thx,
-Vineet