1//===-- save.S - save up to 12 callee-saved registers ---------------------===// 2// 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4// See https://llvm.org/LICENSE.txt for license information. 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6// 7//===----------------------------------------------------------------------===// 8// 9// Multiple entry points depending on number of registers to save 10// 11//===----------------------------------------------------------------------===// 12 13// The entry points are grouped up into 2s for rv64 and 4s for rv32 since this 14// is the minimum grouping which will maintain the required 16-byte stack 15// alignment. 16 17 .text 18 19#if __riscv_xlen == 32 20 21 .globl __riscv_save_12 22 .type __riscv_save_12,@function 23__riscv_save_12: 24 addi sp, sp, -64 25 mv t1, zero 26 sw s11, 12(sp) 27 j .Lriscv_save_11_8 28 29 .globl __riscv_save_11 30 .type __riscv_save_11,@function 31 .globl __riscv_save_10 32 .type __riscv_save_10,@function 33 .globl __riscv_save_9 34 .type __riscv_save_9,@function 35 .globl __riscv_save_8 36 .type __riscv_save_8,@function 37__riscv_save_11: 38__riscv_save_10: 39__riscv_save_9: 40__riscv_save_8: 41 addi sp, sp, -64 42 li t1, 16 43.Lriscv_save_11_8: 44 sw s10, 16(sp) 45 sw s9, 20(sp) 46 sw s8, 24(sp) 47 sw s7, 28(sp) 48 j .Lriscv_save_7_4 49 50 .globl __riscv_save_7 51 .type __riscv_save_7,@function 52 .globl __riscv_save_6 53 .type __riscv_save_6,@function 54 .globl __riscv_save_5 55 .type __riscv_save_5,@function 56 .globl __riscv_save_4 57 .type __riscv_save_4,@function 58__riscv_save_7: 59__riscv_save_6: 60__riscv_save_5: 61__riscv_save_4: 62 addi sp, sp, -64 63 li t1, 32 64.Lriscv_save_7_4: 65 sw s6, 32(sp) 66 sw s5, 36(sp) 67 sw s4, 40(sp) 68 sw s3, 44(sp) 69 sw s2, 48(sp) 70 sw s1, 52(sp) 71 sw s0, 56(sp) 72 sw ra, 60(sp) 73 add sp, sp, t1 74 jr t0 75 76 .globl __riscv_save_3 77 .type __riscv_save_3,@function 78 .globl __riscv_save_2 79 .type __riscv_save_2,@function 80 .globl __riscv_save_1 81 .type __riscv_save_1,@function 82 .globl __riscv_save_0 83 .type __riscv_save_0,@function 84__riscv_save_3: 85__riscv_save_2: 86__riscv_save_1: 87__riscv_save_0: 88 addi sp, sp, -16 89 sw s2, 0(sp) 90 sw s1, 4(sp) 91 sw s0, 8(sp) 92 sw ra, 12(sp) 93 jr t0 94 95#elif __riscv_xlen == 64 96 97 .globl __riscv_save_12 98 .type __riscv_save_12,@function 99__riscv_save_12: 100 addi sp, sp, -112 101 mv t1, zero 102 sd s11, 8(sp) 103 j .Lriscv_save_11_10 104 105 .globl __riscv_save_11 106 .type __riscv_save_11,@function 107 .globl __riscv_save_10 108 .type __riscv_save_10,@function 109__riscv_save_11: 110__riscv_save_10: 111 addi sp, sp, -112 112 li t1, 16 113.Lriscv_save_11_10: 114 sd s10, 16(sp) 115 sd s9, 24(sp) 116 j .Lriscv_save_9_8 117 118 .globl __riscv_save_9 119 .type __riscv_save_9,@function 120 .globl __riscv_save_8 121 .type __riscv_save_8,@function 122__riscv_save_9: 123__riscv_save_8: 124 addi sp, sp, -112 125 li t1, 32 126.Lriscv_save_9_8: 127 sd s8, 32(sp) 128 sd s7, 40(sp) 129 j .Lriscv_save_7_6 130 131 .globl __riscv_save_7 132 .type __riscv_save_7,@function 133 .globl __riscv_save_6 134 .type __riscv_save_6,@function 135__riscv_save_7: 136__riscv_save_6: 137 addi sp, sp, -112 138 li t1, 48 139.Lriscv_save_7_6: 140 sd s6, 48(sp) 141 sd s5, 56(sp) 142 j .Lriscv_save_5_4 143 144 .globl __riscv_save_5 145 .type __riscv_save_5,@function 146 .globl __riscv_save_4 147 .type __riscv_save_4,@function 148__riscv_save_5: 149__riscv_save_4: 150 addi sp, sp, -112 151 li t1, 64 152.Lriscv_save_5_4: 153 sd s4, 64(sp) 154 sd s3, 72(sp) 155 j .Lriscv_save_3_2 156 157 .globl __riscv_save_3 158 .type __riscv_save_3,@function 159 .globl __riscv_save_2 160 .type __riscv_save_2,@function 161__riscv_save_3: 162__riscv_save_2: 163 addi sp, sp, -112 164 li t1, 80 165.Lriscv_save_3_2: 166 sd s2, 80(sp) 167 sd s1, 88(sp) 168 sd s0, 96(sp) 169 sd ra, 104(sp) 170 add sp, sp, t1 171 jr t0 172 173 .globl __riscv_save_1 174 .type __riscv_save_1,@function 175 .globl __riscv_save_0 176 .type __riscv_save_0,@function 177 addi sp, sp, -16 178 sd s0, 0(sp) 179 sd ra, 8(sp) 180 jr t0 181 182#else 183# error "xlen must be 32 or 64 for save-restore implementation 184#endif 185