From: Nick Desaulniers <ndesaulniers@google.com>
To: akpm@linux-foundation.org, hpa@zytor.com, mingo@redhat.com,
tglx@linutronix.de
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"H. Peter Anvin" <hpa@linux.intel.com>
Subject: [PATCH v5 2/3] x86/asm: add _ASM_ARG* constants for argument registers to <asm/asm.h>
Date: Wed, 13 Jun 2018 14:05:17 -0700 [thread overview]
Message-ID: <20180613210518.113983-3-ndesaulniers@google.com> (raw)
In-Reply-To: <20180613210518.113983-1-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".
--
2.18.0.rc1.244.gcf134e6275-goog
next prev parent reply other threads:[~2018-06-13 21:05 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-13 21:05 [PATCH v5 0/3] extern inline native_save_fl for paravirt Nick Desaulniers
2018-06-13 21:05 ` [PATCH v5 1/3] compiler-gcc.h: add gnu_inline to all inline declarations Nick Desaulniers
2018-06-13 21:05 ` Nick Desaulniers [this message]
2018-06-14 20:47 ` [PATCH v5 2/3] x86/asm: add _ASM_ARG* constants for argument registers to <asm/asm.h> H. Peter Anvin
2018-06-14 20:59 ` Nick Desaulniers
2018-06-15 0:17 ` H. Peter Anvin
2018-06-20 16:40 ` Nick Desaulniers
2018-06-21 12:28 ` Ingo Molnar
2018-06-15 4:04 ` Sedat Dilek
2018-06-13 21:05 ` [PATCH v5 3/3] x86: paravirt: make native_save_fl extern inline Nick Desaulniers
2018-06-14 13:20 ` [PATCH v5 0/3] extern inline native_save_fl for paravirt Sedat Dilek
2018-06-19 15:03 ` Juergen Gross
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