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From: Nick Desaulniers <ndesaulniers@google.com>
To: akpm@linux-foundation.org, hpa@zytor.com, mingo@redhat.com,
	tglx@linutronix.de
Cc: linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org,
	x86@kernel.org, virtualization@lists.linux-foundation.org,
	astrachan@google.com, manojgupta@google.com,
	ghackmann@google.com, sedat.dilek@gmail.com, tstellar@redhat.com,
	keescook@google.com, yamada.masahiro@socionext.com,
	michal.lkml@markovi.net, linux-kbuild@vger.kernel.org,
	geert@linux-m68k.org, will.deacon@arm.com,
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	acme@redhat.com, pombredanne@nexb.com, aryabinin@virtuozzo.com,
	kstewart@linuxfoundation.org, boris.ostrovsky@oracle.com,
	jan.kiszka@siemens.com, rostedt@goodmis.org,
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	caoj.fnst@cn.fujitsu.com, gregkh@linuxfoundation.org,
	jarkko.sakkinen@linux.intel.com, jgross@suse.com,
	jpoimboe@redhat.com, mka@chromium.org, ndesaulniers@google.com,
	thomas.lendacky@amd.com, tweek@google.com, mjg59@google.com,
	joe@perches.com, "H. Peter Anvin" <hpa@linux.intel.com>
Subject: [PATCH v3 2/3] x86/asm: add _ASM_ARG* constants for argument registers to <asm/asm.h>
Date: Thu,  7 Jun 2018 11:32:18 -0700	[thread overview]
Message-ID: <20180607183219.192973-3-ndesaulniers@google.com> (raw)
In-Reply-To: <20180607183219.192973-1-ndesaulniers@google.com>

From: "H. Peter Anvin" <hpa@linux.intel.com>

i386 and x86-64 uses different registers for arguments; make them
available so we don't have to #ifdef in the actual code.

Native size and specified size (q, l, w, b) versions are provided.

Suggested-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
---
 arch/x86/include/asm/asm.h | 59 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)

diff --git a/arch/x86/include/asm/asm.h b/arch/x86/include/asm/asm.h
index 219faaec51df..990770f9e76b 100644
--- a/arch/x86/include/asm/asm.h
+++ b/arch/x86/include/asm/asm.h
@@ -46,6 +46,65 @@
 #define _ASM_SI		__ASM_REG(si)
 #define _ASM_DI		__ASM_REG(di)
 
+#ifndef __x86_64__
+/* 32 bit */
+
+#define _ASM_ARG1	_ASM_AX
+#define _ASM_ARG2	_ASM_DX
+#define _ASM_ARG3	_ASM_CX
+
+#define _ASM_ARG1L	eax
+#define _ASM_ARG2L	edx
+#define _ASM_ARG3L	ecx
+
+#define _ASM_ARG1W	ax
+#define _ASM_ARG2W	dx
+#define _ASM_ARG3W	cx
+
+#define _ASM_ARG1B	al
+#define _ASM_ARG2B	dl
+#define _ASM_ARG3B	cl
+
+#else
+/* 64 bit */
+
+#define _ASM_ARG1	_ASM_DI
+#define _ASM_ARG2	_ASM_SI
+#define _ASM_ARG3	_ASM_DX
+#define _ASM_ARG4	_ASM_CX
+#define _ASM_ARG5	r8
+#define _ASM_ARG6	r9
+
+#define _ASM_ARG1Q	rdi
+#define _ASM_ARG2Q	rsi
+#define _ASM_ARG3Q	rdx
+#define _ASM_ARG4Q	rcx
+#define _ASM_ARG5Q	r8
+#define _ASM_ARG6Q	r9
+
+#define _ASM_ARG1L	edi
+#define _ASM_ARG2L	esi
+#define _ASM_ARG3L	edx
+#define _ASM_ARG4L	ecx
+#define _ASM_ARG5L	r8d
+#define _ASM_ARG6L	r9d
+
+#define _ASM_ARG1W	di
+#define _ASM_ARG2W	si
+#define _ASM_ARG3W	dx
+#define _ASM_ARG4W	cx
+#define _ASM_ARG5W	r8w
+#define _ASM_ARG6W	r9w
+
+#define _ASM_ARG1B	dil
+#define _ASM_ARG2B	sil
+#define _ASM_ARG3B	dl
+#define _ASM_ARG4B	cl
+#define _ASM_ARG5B	r8b
+#define _ASM_ARG6B	r9b
+
+#endif
+
 /*
  * Macros to generate condition code outputs from inline assembly,
  * The output operand must be type "bool".
-- 
2.17.1.1185.g55be947832-goog

  parent reply	other threads:[~2018-06-07 18:32 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-07 18:32 [PATCH v3 0/3] extern inline native_save_fl for paravirt Nick Desaulniers
2018-06-07 18:32 ` [PATCH v3 1/3] compiler-gcc.h: add gnu_inline to all inline declarations Nick Desaulniers
2018-06-07 18:43   ` Joe Perches
2018-06-07 18:32 ` Nick Desaulniers [this message]
2018-06-07 20:13   ` [PATCH v3 2/3] x86/asm: add _ASM_ARG* constants for argument registers to <asm/asm.h> H. Peter Anvin
2018-06-07 20:15     ` Nick Desaulniers
2018-06-07 18:32 ` [PATCH v3 3/3] x86: paravirt: make native_save_fl extern inline Nick Desaulniers
2018-06-07 18:39   ` Nick Desaulniers

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