1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * Copyright (C) 2005 - 2013 Tensilica Inc. 4 * Copyright (C) 2014 - 2016 Cadence Design Systems Inc. 5 */ 6 7 #ifndef _XTENSA_ASMMACRO_H 8 #define _XTENSA_ASMMACRO_H 9 10 #include <asm/arch/core.h> 11 12 /* 13 * Function entry and return macros for supported ABIs. 14 */ 15 16 #if defined(__XTENSA_WINDOWED_ABI__) 17 #define abi_entry entry sp, 16 18 #define abi_ret retw 19 #elif defined(__XTENSA_CALL0_ABI__) 20 #define abi_entry 21 #define abi_ret ret 22 #else 23 #error Unsupported Xtensa ABI 24 #endif 25 26 /* 27 * Some little helpers for loops. Use zero-overhead-loops 28 * where applicable and if supported by the processor. 29 * 30 * __loopi ar, at, size, inc 31 * ar register initialized with the start address 32 * at scratch register used by macro 33 * size size immediate value 34 * inc increment 35 * 36 * __loops ar, as, at, inc_log2[, mask_log2][, cond][, ncond] 37 * ar register initialized with the start address 38 * as register initialized with the size 39 * at scratch register use by macro 40 * inc_log2 increment [in log2] 41 * mask_log2 mask [in log2] 42 * cond true condition (used in loop'cond') 43 * ncond false condition (used in b'ncond') 44 * 45 * __loop as 46 * restart loop. 'as' register must not have been modified! 47 * 48 * __endla ar, as, incr 49 * ar start address (modified) 50 * as scratch register used by __loops/__loopi macros or 51 * end address used by __loopt macro 52 * inc increment 53 */ 54 55 #if XCHAL_HAVE_LOOPS 56 57 .macro __loopi ar, at, size, incr 58 movi \at, ((\size + \incr - 1) / (\incr)) 59 loop \at, 99f 60 .endm 61 62 63 .macro __loops ar, as, at, incr_log2, mask_log2, cond, ncond 64 .ifgt \incr_log2 - 1 65 addi \at, \as, (1 << \incr_log2) - 1 66 .ifnc \mask_log2, 67 extui \at, \at, \incr_log2, \mask_log2 68 .else 69 srli \at, \at, \incr_log2 70 .endif 71 .endif 72 loop\cond \at, 99f 73 .endm 74 75 76 .macro __loopt ar, as, at, incr_log2 77 sub \at, \as, \ar 78 .ifgt \incr_log2 - 1 79 addi \at, \at, (1 << \incr_log2) - 1 80 srli \at, \at, \incr_log2 81 .endif 82 loop \at, 99f 83 .endm 84 85 86 .macro __loop as 87 loop \as, 99f 88 .endm 89 90 91 .macro __endl ar, as 92 99: 93 .endm 94 95 96 #else 97 98 .macro __loopi ar, at, size, incr 99 movi \at, ((\size + \incr - 1) / (\incr)) 100 addi \at, \ar, \size 101 98: 102 .endm 103 104 105 .macro __loops ar, as, at, incr_log2, mask_log2, cond, ncond 106 .ifnc \mask_log2, 107 extui \at, \as, \incr_log2, \mask_log2 108 .else 109 .ifnc \ncond, 110 srli \at, \as, \incr_log2 111 .endif 112 .endif 113 .ifnc \ncond, 114 b\ncond \at, 99f 115 116 .endif 117 .ifnc \mask_log2, 118 slli \at, \at, \incr_log2 119 add \at, \ar, \at 120 .else 121 add \at, \ar, \as 122 .endif 123 98: 124 .endm 125 126 .macro __loopt ar, as, at, incr_log2 127 98: 128 .endm 129 130 131 .macro __loop as 132 98: 133 .endm 134 135 136 .macro __endl ar, as 137 bltu \ar, \as, 98b 138 99: 139 .endm 140 141 142 #endif 143 144 145 .macro __endla ar, as, incr 146 addi \ar, \ar, \incr 147 __endl \ar \as 148 .endm 149 150 151 #endif /* _XTENSA_ASMMACRO_H */ 152
