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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/x86/include/asm/rmwcc.h
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/x86/include/asm/rmwcc.h')
-rw-r--r--arch/x86/include/asm/rmwcc.h65
1 files changed, 65 insertions, 0 deletions
diff --git a/arch/x86/include/asm/rmwcc.h b/arch/x86/include/asm/rmwcc.h
new file mode 100644
index 0000000000..4b081e0d33
--- /dev/null
+++ b/arch/x86/include/asm/rmwcc.h
@@ -0,0 +1,65 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_X86_RMWcc
+#define _ASM_X86_RMWcc
+
+#include <linux/args.h>
+
+#define __CLOBBERS_MEM(clb...) "memory", ## clb
+
+#ifndef __GCC_ASM_FLAG_OUTPUTS__
+
+/* Use asm goto */
+
+#define __GEN_RMWcc(fullop, _var, cc, clobbers, ...) \
+({ \
+ bool c = false; \
+ asm_volatile_goto (fullop "; j" #cc " %l[cc_label]" \
+ : : [var] "m" (_var), ## __VA_ARGS__ \
+ : clobbers : cc_label); \
+ if (0) { \
+cc_label: c = true; \
+ } \
+ c; \
+})
+
+#else /* defined(__GCC_ASM_FLAG_OUTPUTS__) */
+
+/* Use flags output or a set instruction */
+
+#define __GEN_RMWcc(fullop, _var, cc, clobbers, ...) \
+({ \
+ bool c; \
+ asm volatile (fullop CC_SET(cc) \
+ : [var] "+m" (_var), CC_OUT(cc) (c) \
+ : __VA_ARGS__ : clobbers); \
+ c; \
+})
+
+#endif /* defined(__GCC_ASM_FLAG_OUTPUTS__) */
+
+#define GEN_UNARY_RMWcc_4(op, var, cc, arg0) \
+ __GEN_RMWcc(op " " arg0, var, cc, __CLOBBERS_MEM())
+
+#define GEN_UNARY_RMWcc_3(op, var, cc) \
+ GEN_UNARY_RMWcc_4(op, var, cc, "%[var]")
+
+#define GEN_UNARY_RMWcc(X...) CONCATENATE(GEN_UNARY_RMWcc_, COUNT_ARGS(X))(X)
+
+#define GEN_BINARY_RMWcc_6(op, var, cc, vcon, _val, arg0) \
+ __GEN_RMWcc(op " %[val], " arg0, var, cc, \
+ __CLOBBERS_MEM(), [val] vcon (_val))
+
+#define GEN_BINARY_RMWcc_5(op, var, cc, vcon, val) \
+ GEN_BINARY_RMWcc_6(op, var, cc, vcon, val, "%[var]")
+
+#define GEN_BINARY_RMWcc(X...) CONCATENATE(GEN_BINARY_RMWcc_, COUNT_ARGS(X))(X)
+
+#define GEN_UNARY_SUFFIXED_RMWcc(op, suffix, var, cc, clobbers...) \
+ __GEN_RMWcc(op " %[var]\n\t" suffix, var, cc, \
+ __CLOBBERS_MEM(clobbers))
+
+#define GEN_BINARY_SUFFIXED_RMWcc(op, suffix, var, cc, vcon, _val, clobbers...)\
+ __GEN_RMWcc(op " %[val], %[var]\n\t" suffix, var, cc, \
+ __CLOBBERS_MEM(clobbers), [val] vcon (_val))
+
+#endif /* _ASM_X86_RMWcc */