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From: Nathan Chancellor <nathan@kernel.org>
To: Huacai Chen <chenhuacai@kernel.org>,
	Jiaxun Yang <jiaxun.yang@flygoat.com>,
	Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Nick Desaulniers <ndesaulniers@google.com>,
	linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org,
	llvm@lists.linux.dev, Nathan Chancellor <nathan@kernel.org>,
	Ryutaroh Matsumoto <ryutaroh@ict.e.titech.ac.jp>
Subject: [PATCH] MIPS: Loongson64: Use three arguments for slti
Date: Tue,  7 Dec 2021 10:01:29 -0700	[thread overview]
Message-ID: <20211207170129.578089-1-nathan@kernel.org> (raw)

LLVM's integrated assembler does not support 'stli <reg>, <imm>':

<instantiation>:16:12: error: invalid operand for instruction
 slti $12, (0x6300 | 0x0008)
           ^
arch/mips/kernel/head.S:86:2: note: while in macro instantiation
 kernel_entry_setup # cpu specific setup
 ^
<instantiation>:16:12: error: invalid operand for instruction
 slti $12, (0x6300 | 0x0008)
           ^
arch/mips/kernel/head.S:150:2: note: while in macro instantiation
 smp_slave_setup
 ^

To increase compatibility with LLVM's integrated assembler, use the full
form of 'stli <reg>, <reg>, <imm>', which matches the rest of
arch/mips/. This does not result in any change for GNU as.

Link: https://github.com/ClangBuiltLinux/linux/issues/1526
Reported-by: Ryutaroh Matsumoto <ryutaroh@ict.e.titech.ac.jp>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
---
 arch/mips/include/asm/mach-loongson64/kernel-entry-init.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/mips/include/asm/mach-loongson64/kernel-entry-init.h b/arch/mips/include/asm/mach-loongson64/kernel-entry-init.h
index 13373c5144f8..efb41b351974 100644
--- a/arch/mips/include/asm/mach-loongson64/kernel-entry-init.h
+++ b/arch/mips/include/asm/mach-loongson64/kernel-entry-init.h
@@ -32,7 +32,7 @@
 	nop
 	/* Loongson-3A R2/R3 */
 	andi	t0, (PRID_IMP_MASK | PRID_REV_MASK)
-	slti	t0, (PRID_IMP_LOONGSON_64C | PRID_REV_LOONGSON3A_R2_0)
+	slti	t0, t0, (PRID_IMP_LOONGSON_64C | PRID_REV_LOONGSON3A_R2_0)
 	bnez	t0, 2f
 	nop
 1:
@@ -63,7 +63,7 @@
 	nop
 	/* Loongson-3A R2/R3 */
 	andi	t0, (PRID_IMP_MASK | PRID_REV_MASK)
-	slti	t0, (PRID_IMP_LOONGSON_64C | PRID_REV_LOONGSON3A_R2_0)
+	slti	t0, t0, (PRID_IMP_LOONGSON_64C | PRID_REV_LOONGSON3A_R2_0)
 	bnez	t0, 2f
 	nop
 1:

base-commit: 0fcfb00b28c0b7884635dacf38e46d60bf3d4eb1
-- 
2.34.1


             reply	other threads:[~2021-12-07 17:02 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-07 17:01 Nathan Chancellor [this message]
2021-12-08  8:55 ` [PATCH] MIPS: Loongson64: Use three arguments for slti Sergey Shtylyov

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