18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 28c2ecf20Sopenharmony_ci#ifndef _ASM_X86_RMWcc 38c2ecf20Sopenharmony_ci#define _ASM_X86_RMWcc 48c2ecf20Sopenharmony_ci 58c2ecf20Sopenharmony_ci/* This counts to 12. Any more, it will return 13th argument. */ 68c2ecf20Sopenharmony_ci#define __RMWcc_ARGS(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _n, X...) _n 78c2ecf20Sopenharmony_ci#define RMWcc_ARGS(X...) __RMWcc_ARGS(, ##X, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0) 88c2ecf20Sopenharmony_ci 98c2ecf20Sopenharmony_ci#define __RMWcc_CONCAT(a, b) a ## b 108c2ecf20Sopenharmony_ci#define RMWcc_CONCAT(a, b) __RMWcc_CONCAT(a, b) 118c2ecf20Sopenharmony_ci 128c2ecf20Sopenharmony_ci#define __CLOBBERS_MEM(clb...) "memory", ## clb 138c2ecf20Sopenharmony_ci 148c2ecf20Sopenharmony_ci#if !defined(__GCC_ASM_FLAG_OUTPUTS__) && defined(CONFIG_CC_HAS_ASM_GOTO) 158c2ecf20Sopenharmony_ci 168c2ecf20Sopenharmony_ci/* Use asm goto */ 178c2ecf20Sopenharmony_ci 188c2ecf20Sopenharmony_ci#define __GEN_RMWcc(fullop, _var, cc, clobbers, ...) \ 198c2ecf20Sopenharmony_ci({ \ 208c2ecf20Sopenharmony_ci bool c = false; \ 218c2ecf20Sopenharmony_ci asm_volatile_goto (fullop "; j" #cc " %l[cc_label]" \ 228c2ecf20Sopenharmony_ci : : [var] "m" (_var), ## __VA_ARGS__ \ 238c2ecf20Sopenharmony_ci : clobbers : cc_label); \ 248c2ecf20Sopenharmony_ci if (0) { \ 258c2ecf20Sopenharmony_cicc_label: c = true; \ 268c2ecf20Sopenharmony_ci } \ 278c2ecf20Sopenharmony_ci c; \ 288c2ecf20Sopenharmony_ci}) 298c2ecf20Sopenharmony_ci 308c2ecf20Sopenharmony_ci#else /* defined(__GCC_ASM_FLAG_OUTPUTS__) || !defined(CONFIG_CC_HAS_ASM_GOTO) */ 318c2ecf20Sopenharmony_ci 328c2ecf20Sopenharmony_ci/* Use flags output or a set instruction */ 338c2ecf20Sopenharmony_ci 348c2ecf20Sopenharmony_ci#define __GEN_RMWcc(fullop, _var, cc, clobbers, ...) \ 358c2ecf20Sopenharmony_ci({ \ 368c2ecf20Sopenharmony_ci bool c; \ 378c2ecf20Sopenharmony_ci asm volatile (fullop CC_SET(cc) \ 388c2ecf20Sopenharmony_ci : [var] "+m" (_var), CC_OUT(cc) (c) \ 398c2ecf20Sopenharmony_ci : __VA_ARGS__ : clobbers); \ 408c2ecf20Sopenharmony_ci c; \ 418c2ecf20Sopenharmony_ci}) 428c2ecf20Sopenharmony_ci 438c2ecf20Sopenharmony_ci#endif /* defined(__GCC_ASM_FLAG_OUTPUTS__) || !defined(CONFIG_CC_HAS_ASM_GOTO) */ 448c2ecf20Sopenharmony_ci 458c2ecf20Sopenharmony_ci#define GEN_UNARY_RMWcc_4(op, var, cc, arg0) \ 468c2ecf20Sopenharmony_ci __GEN_RMWcc(op " " arg0, var, cc, __CLOBBERS_MEM()) 478c2ecf20Sopenharmony_ci 488c2ecf20Sopenharmony_ci#define GEN_UNARY_RMWcc_3(op, var, cc) \ 498c2ecf20Sopenharmony_ci GEN_UNARY_RMWcc_4(op, var, cc, "%[var]") 508c2ecf20Sopenharmony_ci 518c2ecf20Sopenharmony_ci#define GEN_UNARY_RMWcc(X...) RMWcc_CONCAT(GEN_UNARY_RMWcc_, RMWcc_ARGS(X))(X) 528c2ecf20Sopenharmony_ci 538c2ecf20Sopenharmony_ci#define GEN_BINARY_RMWcc_6(op, var, cc, vcon, _val, arg0) \ 548c2ecf20Sopenharmony_ci __GEN_RMWcc(op " %[val], " arg0, var, cc, \ 558c2ecf20Sopenharmony_ci __CLOBBERS_MEM(), [val] vcon (_val)) 568c2ecf20Sopenharmony_ci 578c2ecf20Sopenharmony_ci#define GEN_BINARY_RMWcc_5(op, var, cc, vcon, val) \ 588c2ecf20Sopenharmony_ci GEN_BINARY_RMWcc_6(op, var, cc, vcon, val, "%[var]") 598c2ecf20Sopenharmony_ci 608c2ecf20Sopenharmony_ci#define GEN_BINARY_RMWcc(X...) RMWcc_CONCAT(GEN_BINARY_RMWcc_, RMWcc_ARGS(X))(X) 618c2ecf20Sopenharmony_ci 628c2ecf20Sopenharmony_ci#define GEN_UNARY_SUFFIXED_RMWcc(op, suffix, var, cc, clobbers...) \ 638c2ecf20Sopenharmony_ci __GEN_RMWcc(op " %[var]\n\t" suffix, var, cc, \ 648c2ecf20Sopenharmony_ci __CLOBBERS_MEM(clobbers)) 658c2ecf20Sopenharmony_ci 668c2ecf20Sopenharmony_ci#define GEN_BINARY_SUFFIXED_RMWcc(op, suffix, var, cc, vcon, _val, clobbers...)\ 678c2ecf20Sopenharmony_ci __GEN_RMWcc(op " %[val], %[var]\n\t" suffix, var, cc, \ 688c2ecf20Sopenharmony_ci __CLOBBERS_MEM(clobbers), [val] vcon (_val)) 698c2ecf20Sopenharmony_ci 708c2ecf20Sopenharmony_ci#endif /* _ASM_X86_RMWcc */ 71