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