diff options
| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
| commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
| tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /arch/x86/include/asm/rmwcc.h | |
| parent | Initial commit. (diff) | |
| download | linux-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.h | 65 |
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 */ |