1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_RMWcc 3 #define _ASM_X86_RMWcc 4 5 #define __CLOBBERS_MEM(clb...) "memory", ## clb 6 7 #if !defined(__GCC_ASM_FLAG_OUTPUTS__) && defined(CC_HAVE_ASM_GOTO) 8 9 /* Use asm goto */ 10 11 #define __GEN_RMWcc(fullop, var, cc, clobbers, ...) \ 12 do { \ 13 asm_volatile_goto (fullop "; j" #cc " %l[cc_label]" \ 14 : : [counter] "m" (var), ## __VA_ARGS__ \ 15 : clobbers : cc_label); \ 16 return 0; \ 17 cc_label: \ 18 return 1; \ 19 } while (0) 20 21 #define __BINARY_RMWcc_ARG " %1, " 22 23 24 #else /* defined(__GCC_ASM_FLAG_OUTPUTS__) || !defined(CC_HAVE_ASM_GOTO) */ 25 26 /* Use flags output or a set instruction */ 27 28 #define __GEN_RMWcc(fullop, var, cc, clobbers, ...) \ 29 do { \ 30 bool c; \ 31 asm volatile (fullop CC_SET(cc) \ 32 : [counter] "+m" (var), CC_OUT(cc) (c) \ 33 : __VA_ARGS__ : clobbers); \ 34 return c; \ 35 } while (0) 36 37 #define __BINARY_RMWcc_ARG " %2, " 38 39 #endif /* defined(__GCC_ASM_FLAG_OUTPUTS__) || !defined(CC_HAVE_ASM_GOTO) */ 40 41 #define GEN_UNARY_RMWcc(op, var, arg0, cc) \ 42 __GEN_RMWcc(op " " arg0, var, cc, __CLOBBERS_MEM()) 43 44 #define GEN_UNARY_SUFFIXED_RMWcc(op, suffix, var, arg0, cc, clobbers...)\ 45 __GEN_RMWcc(op " " arg0 "\n\t" suffix, var, cc, \ 46 __CLOBBERS_MEM(clobbers)) 47 48 #define GEN_BINARY_RMWcc(op, var, vcon, val, arg0, cc) \ 49 __GEN_RMWcc(op __BINARY_RMWcc_ARG arg0, var, cc, \ 50 __CLOBBERS_MEM(), vcon (val)) 51 52 #define GEN_BINARY_SUFFIXED_RMWcc(op, suffix, var, vcon, val, arg0, cc, \ 53 clobbers...) \ 54 __GEN_RMWcc(op __BINARY_RMWcc_ARG arg0 "\n\t" suffix, var, cc, \ 55 __CLOBBERS_MEM(clobbers), vcon (val)) 56 57 #endif /* _ASM_X86_RMWcc */ 58