9fa4023c7a
Rewrite code sequences throughout the 64-bit RISC-V `__riscv_save_*' routines replacing `li t1, -48', `li t1, -64', and `li t1, -80', instructions, which do not have a compressed encoding, respectively with `li t1, 3', `li t1, 4', and `li t1, 4', which do, and then adjusting the remaining code accordingly observing that `sub sp, sp, t1' takes the same amount of space as an `slli t1, t1, 4'/`add sp, sp, t1' instruction pair does, again due to the use of compressed encodings, saving 6 bytes total. This change does increase code size by 4 bytes for RISC-V processors lacking the compressed instruction set, however their users couldn't care about the code size or they would have chosen an implementation that does have the compressed instructions, wouldn't they? libgcc/ * config/riscv/save-restore.S [__riscv_xlen == 64] (__riscv_save_10, __riscv_save_8, __riscv_save_6, __riscv_save_4) (__riscv_save_2): Replace negative immediates used for the final stack pointer adjustment with positive ones, right-shifted by 4.
534 lines
11 KiB
ArmAsm
534 lines
11 KiB
ArmAsm
/* Callee-saved register spill and fill routines for RISC-V.
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Copyright (C) 2016-2020 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "riscv-asm.h"
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.text
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#if __riscv_xlen == 64
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FUNC_BEGIN (__riscv_save_12)
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.cfi_startproc
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# __riscv_save_* routine use t0/x5 as return address
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.cfi_return_column 5
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addi sp, sp, -112
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.cfi_def_cfa_offset 112
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li t1, 0
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sd s11, 8(sp)
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.cfi_offset 27, -104
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j .Ls10
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FUNC_BEGIN (__riscv_save_11)
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FUNC_BEGIN (__riscv_save_10)
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.cfi_restore 27
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addi sp, sp, -112
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.cfi_def_cfa_offset 112
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li t1, 1
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.Ls10:
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sd s10, 16(sp)
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.cfi_offset 26, -96
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sd s9, 24(sp)
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.cfi_offset 25, -88
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j .Ls8
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FUNC_BEGIN (__riscv_save_9)
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FUNC_BEGIN (__riscv_save_8)
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.cfi_restore 25
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.cfi_restore 26
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.cfi_restore 27
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addi sp, sp, -112
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.cfi_def_cfa_offset 112
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li t1, 2
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.Ls8:
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sd s8, 32(sp)
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.cfi_offset 24, -80
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sd s7, 40(sp)
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.cfi_offset 23, -72
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j .Ls6
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FUNC_BEGIN (__riscv_save_7)
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FUNC_BEGIN (__riscv_save_6)
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.cfi_restore 23
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.cfi_restore 24
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.cfi_restore 25
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.cfi_restore 26
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.cfi_restore 27
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addi sp, sp, -112
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.cfi_def_cfa_offset 112
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li t1, 3
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.Ls6:
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sd s6, 48(sp)
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.cfi_offset 22, -64
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sd s5, 56(sp)
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.cfi_offset 21, -56
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j .Ls4
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FUNC_BEGIN (__riscv_save_5)
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FUNC_BEGIN (__riscv_save_4)
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.cfi_restore 21
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.cfi_restore 22
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.cfi_restore 24
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.cfi_restore 25
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.cfi_restore 26
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.cfi_restore 27
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.cfi_restore 24
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.cfi_restore 25
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.cfi_restore 26
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.cfi_restore 27
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addi sp, sp, -112
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.cfi_def_cfa_offset 112
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li t1, 4
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.Ls4:
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sd s4, 64(sp)
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.cfi_offset 20, -48
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sd s3, 72(sp)
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.cfi_offset 19, -40
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j .Ls2
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FUNC_BEGIN (__riscv_save_3)
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FUNC_BEGIN (__riscv_save_2)
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.cfi_restore 19
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.cfi_restore 20
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.cfi_restore 21
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.cfi_restore 22
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.cfi_restore 24
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.cfi_restore 25
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.cfi_restore 26
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.cfi_restore 27
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.cfi_restore 24
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.cfi_restore 25
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.cfi_restore 26
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.cfi_restore 27
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addi sp, sp, -112
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.cfi_def_cfa_offset 112
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li t1, 5
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.Ls2:
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sd s2, 80(sp)
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.cfi_offset 18, -32
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sd s1, 88(sp)
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.cfi_offset 9, -24
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sd s0, 96(sp)
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.cfi_offset 8, -16
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sd ra, 104(sp)
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.cfi_offset 1, -8
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slli t1, t1, 4
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# CFA info is not correct in next 2 instruction since t1's
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# value is depend on how may register really save.
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add sp, sp, t1
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jr t0
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.cfi_endproc
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FUNC_END (__riscv_save_12)
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FUNC_END (__riscv_save_11)
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FUNC_END (__riscv_save_10)
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FUNC_END (__riscv_save_9)
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FUNC_END (__riscv_save_8)
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FUNC_END (__riscv_save_7)
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FUNC_END (__riscv_save_6)
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FUNC_END (__riscv_save_5)
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FUNC_END (__riscv_save_4)
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FUNC_END (__riscv_save_3)
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FUNC_END (__riscv_save_2)
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FUNC_BEGIN (__riscv_save_1)
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FUNC_BEGIN (__riscv_save_0)
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.cfi_startproc
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# __riscv_save_* routine use t0/x5 as return address
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.cfi_return_column 5
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addi sp, sp, -16
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.cfi_def_cfa_offset 16
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sd s0, 0(sp)
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.cfi_offset 8, -16
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sd ra, 8(sp)
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.cfi_offset 1, -8
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jr t0
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.cfi_endproc
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FUNC_END (__riscv_save_1)
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FUNC_END (__riscv_save_0)
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FUNC_BEGIN (__riscv_restore_12)
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.cfi_startproc
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.cfi_def_cfa_offset 112
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.cfi_offset 27, -104
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.cfi_offset 26, -96
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.cfi_offset 25, -88
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.cfi_offset 24, -80
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.cfi_offset 23, -72
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.cfi_offset 22, -64
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.cfi_offset 21, -56
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.cfi_offset 20, -48
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.cfi_offset 19, -40
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.cfi_offset 18, -32
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.cfi_offset 9, -24
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.cfi_offset 8, -16
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.cfi_offset 1, -8
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ld s11, 8(sp)
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.cfi_restore 27
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addi sp, sp, 16
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FUNC_BEGIN (__riscv_restore_11)
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FUNC_BEGIN (__riscv_restore_10)
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.cfi_restore 27
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.cfi_def_cfa_offset 96
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ld s10, 0(sp)
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.cfi_restore 26
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ld s9, 8(sp)
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.cfi_restore 25
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addi sp, sp, 16
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FUNC_BEGIN (__riscv_restore_9)
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FUNC_BEGIN (__riscv_restore_8)
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.cfi_restore 25
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.cfi_restore 26
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.cfi_restore 27
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.cfi_def_cfa_offset 80
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ld s8, 0(sp)
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.cfi_restore 24
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ld s7, 8(sp)
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.cfi_restore 23
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addi sp, sp, 16
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FUNC_BEGIN (__riscv_restore_7)
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FUNC_BEGIN (__riscv_restore_6)
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.cfi_restore 23
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.cfi_restore 24
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.cfi_restore 25
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.cfi_restore 26
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.cfi_restore 27
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.cfi_def_cfa_offset 64
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ld s6, 0(sp)
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.cfi_restore 22
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ld s5, 8(sp)
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.cfi_restore 21
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addi sp, sp, 16
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FUNC_BEGIN (__riscv_restore_5)
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FUNC_BEGIN (__riscv_restore_4)
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.cfi_restore 21
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.cfi_restore 22
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.cfi_restore 23
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.cfi_restore 24
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.cfi_restore 25
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.cfi_restore 26
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.cfi_restore 27
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.cfi_def_cfa_offset 48
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ld s4, 0(sp)
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.cfi_restore 20
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ld s3, 8(sp)
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.cfi_restore 19
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addi sp, sp, 16
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FUNC_BEGIN (__riscv_restore_3)
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FUNC_BEGIN (__riscv_restore_2)
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.cfi_restore 19
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.cfi_restore 20
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.cfi_restore 21
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.cfi_restore 22
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.cfi_restore 23
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.cfi_restore 24
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.cfi_restore 25
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.cfi_restore 26
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.cfi_restore 27
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.cfi_def_cfa_offset 32
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ld s2, 0(sp)
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.cfi_restore 18
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ld s1, 8(sp)
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.cfi_restore 9
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addi sp, sp, 16
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FUNC_BEGIN (__riscv_restore_1)
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FUNC_BEGIN (__riscv_restore_0)
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.cfi_restore 9
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.cfi_restore 18
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.cfi_restore 19
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.cfi_restore 20
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.cfi_restore 21
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.cfi_restore 22
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.cfi_restore 23
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.cfi_restore 24
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.cfi_restore 25
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.cfi_restore 26
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.cfi_restore 27
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.cfi_def_cfa_offset 16
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ld s0, 0(sp)
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.cfi_restore 8
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ld ra, 8(sp)
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.cfi_restore 1
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addi sp, sp, 16
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.cfi_def_cfa_offset 0
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ret
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.cfi_endproc
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FUNC_END (__riscv_restore_12)
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FUNC_END (__riscv_restore_11)
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FUNC_END (__riscv_restore_10)
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FUNC_END (__riscv_restore_9)
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FUNC_END (__riscv_restore_8)
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FUNC_END (__riscv_restore_7)
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FUNC_END (__riscv_restore_6)
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FUNC_END (__riscv_restore_5)
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FUNC_END (__riscv_restore_4)
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FUNC_END (__riscv_restore_3)
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FUNC_END (__riscv_restore_2)
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FUNC_END (__riscv_restore_1)
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FUNC_END (__riscv_restore_0)
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#else
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#ifdef __riscv_32e
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FUNC_BEGIN(__riscv_save_2)
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FUNC_BEGIN(__riscv_save_1)
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FUNC_BEGIN(__riscv_save_0)
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.cfi_startproc
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# __riscv_save_* routine use t0/x5 as return address
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.cfi_return_column 5
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addi sp, sp, -12
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.cfi_def_cfa_offset 12
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sw s1, 0(sp)
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.cfi_offset 9, -12
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sw s0, 4(sp)
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.cfi_offset 8, -8
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sw ra, 8(sp)
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.cfi_offset 1, 0
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jr t0
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.cfi_endproc
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FUNC_END(__riscv_save_2)
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FUNC_END(__riscv_save_1)
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FUNC_END(__riscv_save_0)
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FUNC_BEGIN(__riscv_restore_2)
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FUNC_BEGIN(__riscv_restore_1)
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FUNC_BEGIN(__riscv_restore_0)
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.cfi_startproc
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.cfi_def_cfa_offset 14
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lw s1, 0(sp)
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.cfi_restore 9
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lw s0, 4(sp)
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.cfi_restore 8
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lw ra, 8(sp)
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.cfi_restore 1
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addi sp, sp, 12
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.cfi_def_cfa_offset 0
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ret
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.cfi_endproc
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FUNC_END(__riscv_restore_2)
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FUNC_END(__riscv_restore_1)
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FUNC_END(__riscv_restore_0)
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#else
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FUNC_BEGIN (__riscv_save_12)
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.cfi_startproc
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# __riscv_save_* routine use t0/x5 as return address
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.cfi_return_column 5
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addi sp, sp, -64
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.cfi_def_cfa_offset 64
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li t1, 0
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sw s11, 12(sp)
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.cfi_offset 27, -52
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j .Ls10
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FUNC_BEGIN (__riscv_save_11)
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FUNC_BEGIN (__riscv_save_10)
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FUNC_BEGIN (__riscv_save_9)
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FUNC_BEGIN (__riscv_save_8)
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.cfi_restore 27
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addi sp, sp, -64
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.cfi_def_cfa_offset 64
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li t1, -16
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.Ls10:
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sw s10, 16(sp)
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.cfi_offset 26, -48
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sw s9, 20(sp)
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.cfi_offset 25, -44
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sw s8, 24(sp)
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.cfi_offset 24, -40
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sw s7, 28(sp)
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.cfi_offset 23, -36
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j .Ls6
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FUNC_BEGIN (__riscv_save_7)
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FUNC_BEGIN (__riscv_save_6)
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FUNC_BEGIN (__riscv_save_5)
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FUNC_BEGIN (__riscv_save_4)
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.cfi_restore 23
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.cfi_restore 24
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.cfi_restore 25
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.cfi_restore 26
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.cfi_restore 27
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addi sp, sp, -64
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.cfi_def_cfa_offset 64
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li t1, -32
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.Ls6:
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sw s6, 32(sp)
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.cfi_offset 22, -32
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sw s5, 36(sp)
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.cfi_offset 21, -28
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sw s4, 40(sp)
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.cfi_offset 20, -24
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sw s3, 44(sp)
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.cfi_offset 19, -20
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sw s2, 48(sp)
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.cfi_offset 18, -16
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sw s1, 52(sp)
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.cfi_offset 9, -12
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sw s0, 56(sp)
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.cfi_offset 8, -8
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sw ra, 60(sp)
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.cfi_offset 1, -4
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# CFA info is not correct in next 2 instruction since t1's
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# value is depend on how may register really save.
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sub sp, sp, t1
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jr t0
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.cfi_endproc
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FUNC_END (__riscv_save_12)
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FUNC_END (__riscv_save_11)
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FUNC_END (__riscv_save_10)
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FUNC_END (__riscv_save_9)
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FUNC_END (__riscv_save_8)
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FUNC_END (__riscv_save_7)
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FUNC_END (__riscv_save_6)
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FUNC_END (__riscv_save_5)
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FUNC_END (__riscv_save_4)
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FUNC_BEGIN (__riscv_save_3)
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FUNC_BEGIN (__riscv_save_2)
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FUNC_BEGIN (__riscv_save_1)
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FUNC_BEGIN (__riscv_save_0)
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.cfi_startproc
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# __riscv_save_* routine use t0/x5 as return address
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.cfi_return_column 5
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addi sp, sp, -16
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.cfi_def_cfa_offset 16
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sw s2, 0(sp)
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sw s1, 4(sp)
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.cfi_offset 9, -16
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sw s0, 8(sp)
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.cfi_offset 8, -8
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sw ra, 12(sp)
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.cfi_offset 1, -4
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jr t0
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.cfi_endproc
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FUNC_END (__riscv_save_3)
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FUNC_END (__riscv_save_2)
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FUNC_END (__riscv_save_1)
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FUNC_END (__riscv_save_0)
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FUNC_BEGIN (__riscv_restore_12)
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.cfi_startproc
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.cfi_def_cfa_offset 64
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.cfi_offset 27, -52
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.cfi_offset 26, -48
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.cfi_offset 25, -44
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.cfi_offset 24, -40
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.cfi_offset 23, -36
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.cfi_offset 22, -32
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.cfi_offset 21, -28
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.cfi_offset 20, -24
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.cfi_offset 19, -20
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.cfi_offset 18, -16
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.cfi_offset 9, -12
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.cfi_offset 8, -8
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.cfi_offset 1, -4
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lw s11, 12(sp)
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.cfi_restore 27
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addi sp, sp, 16
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FUNC_BEGIN (__riscv_restore_11)
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FUNC_BEGIN (__riscv_restore_10)
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FUNC_BEGIN (__riscv_restore_9)
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FUNC_BEGIN (__riscv_restore_8)
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.cfi_restore 27
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.cfi_def_cfa_offset 48
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lw s10, 0(sp)
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.cfi_restore 26
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lw s9, 4(sp)
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.cfi_restore 25
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lw s8, 8(sp)
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.cfi_restore 24
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lw s7, 12(sp)
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.cfi_restore 23
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addi sp, sp, 16
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FUNC_BEGIN (__riscv_restore_7)
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FUNC_BEGIN (__riscv_restore_6)
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FUNC_BEGIN (__riscv_restore_5)
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FUNC_BEGIN (__riscv_restore_4)
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.cfi_restore 23
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.cfi_restore 24
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.cfi_restore 25
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.cfi_restore 26
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.cfi_restore 27
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.cfi_def_cfa_offset 32
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lw s6, 0(sp)
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.cfi_restore 22
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lw s5, 4(sp)
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.cfi_restore 21
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lw s4, 8(sp)
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.cfi_restore 20
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lw s3, 12(sp)
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.cfi_restore 19
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addi sp, sp, 16
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FUNC_BEGIN (__riscv_restore_3)
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FUNC_BEGIN (__riscv_restore_2)
|
|
FUNC_BEGIN (__riscv_restore_1)
|
|
FUNC_BEGIN (__riscv_restore_0)
|
|
.cfi_restore 19
|
|
.cfi_restore 20
|
|
.cfi_restore 21
|
|
.cfi_restore 22
|
|
.cfi_restore 24
|
|
.cfi_restore 25
|
|
.cfi_restore 26
|
|
.cfi_restore 27
|
|
.cfi_def_cfa_offset 16
|
|
lw s2, 0(sp)
|
|
.cfi_restore 18
|
|
lw s1, 4(sp)
|
|
.cfi_restore 9
|
|
lw s0, 8(sp)
|
|
.cfi_restore 8
|
|
lw ra, 12(sp)
|
|
.cfi_restore 1
|
|
addi sp, sp, 16
|
|
.cfi_def_cfa_offset 0
|
|
ret
|
|
.cfi_endproc
|
|
FUNC_END (__riscv_restore_12)
|
|
FUNC_END (__riscv_restore_11)
|
|
FUNC_END (__riscv_restore_10)
|
|
FUNC_END (__riscv_restore_9)
|
|
FUNC_END (__riscv_restore_8)
|
|
FUNC_END (__riscv_restore_7)
|
|
FUNC_END (__riscv_restore_6)
|
|
FUNC_END (__riscv_restore_5)
|
|
FUNC_END (__riscv_restore_4)
|
|
FUNC_END (__riscv_restore_3)
|
|
FUNC_END (__riscv_restore_2)
|
|
FUNC_END (__riscv_restore_1)
|
|
FUNC_END (__riscv_restore_0)
|
|
|
|
#endif /* __riscv_32e */
|
|
|
|
#endif /* __riscv_xlen == 64 */
|