mes/lib/arm-mes/arm.M1

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### GNU Mes --- Maxwell Equations of Software
### Copyright © 2017,2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
### Copyright © 2019,2020 Danny Milosavljevic <dannym@scratchpost.org>
###
### This file is part of GNU Mes.
###
### Mes is free software# you can redistribute it and/or modify it
### under the terms of the GNU General Public License as published by
### the Free Software Foundation# either version 3 of the License, or (at
### your option) any later version.
###
### GNU Mes is distributed in the hope that it will be useful, but
### WITHOUT ANY WARRANTY# without even the implied warranty of
### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
### GNU General Public License for more details.
###
### You should have received a copy of the GNU General Public License
### along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
# Note: r9 is used as scratch register and is assumed to not contain anything important!
# reduced instruction set: r0, r1 (some r2 for shift, r3 for mul)
# The "e" in most opcodes near the end means "always".
# 020090e0 # adds r0, r0, r2; ADDS = '0' op3 op1 '09' op2 'e0'
# 030091e0 # adds r0, r1, r3
# 031091e0 # adds r1, r1, r3
# 030090e0 # adds r0, r0, r3
DEFINE add____$i8,%r0 0090e2 # adds r0, r0, #xx; ADDSI = immediate op1 '09' op2 'e2'
# 0091e2 # adds r0, r1, #xx; ADDSI = immediate op1 '09' op2 'e2'
# 1090e2 # adds r1, r0, #xx; ADDSI = immediate op1 '09' op2 'e2'
DEFINE add____$i8,%r1 1091e2 # adds r1, r1, #xx
DEFINE add____$i8,%r13 d09de2 # adds r13, r13, #xx
DEFINE sub____$i8,%r0 0050e2 # subs r0, r0, #xx
DEFINE sub____$i8,%r1 1051e2 # subs r1, r1, #xx
DEFINE add____%r0,%r0 000090e0 # adds r0, r0, r0
DEFINE add____%r0,%r1 001091e0 # adds r1, r1, r0
DEFINE add____%r1,%r0 010090e0 # adds r0, r0, r1
DEFINE add____%r1,%r1 011091e0 # adds r1, r1, r1
DEFINE and____%r1,%r0 010010e0 # ands r0, r0, r1
DEFINE and____$i8,%r0 0000e2
DEFINE and____$i8,%r1 1001e2
DEFINE call___*%r0 30ff2fe1
DEFINE call___*%r1 31ff2fe1
DEFINE cmp____$i8,%r0 0050e3
DEFINE cmp____$i8,%r1 0051e3
DEFINE cmn____$i8,%r0 0070e3
DEFINE cmn____$i8,%r1 0071e3
DEFINE swi____$0 000000ef
DEFINE ja 8a
DEFINE jae 3a
DEFINE jb 2a
DEFINE jbe 9a
DEFINE je 0a
DEFINE jg ca
DEFINE jge aa
DEFINE jl ba
DEFINE jle da
DEFINE jne 1a
# e3a00064 mov r0, #100
# e3a01064 mov r1, #100
# e3a02064 mov r2, #100
# 0: e3047215 movw r7, #16917 ; 0x4215
# OK:
DEFINE mov____$i8,%r0 00a0e3
DEFINE mov____$i8,%r1 10a0e3
DEFINE mov____$i8,%r7 70a0e3
DEFINE mvn____%r0,$i8 00e0e3
DEFINE mvn____%r1,$i8 10e0e3
DEFINE mvn____%r7,$i8 70e0e3
DEFINE mov____%r0,%r1 0010a0e1
DEFINE mov____%r0,%r2 0020a0e1
DEFINE mov____%fp,%r1 0b10a0e1
DEFINE mov____%fp,%r2 0b20a0e1
DEFINE mov____%r0,(%r1) 000081e5
DEFINE mov____%r1,%r0 0100a0e1
DEFINE mov____%r1,%r2 0120a0e1
DEFINE mov____%esp,%r0 0d00a0e1
# e59f9004 ldr r9, [pc, #4] ; <L1>
# e5890000 str r0, [r9]
# ea000000 b L2
# L1: ???
# L2:
DEFINE mov____%r0,0x32 04909fe5000089e5000000ea
DEFINE mov____%r1,0x32 04909fe5001089e5000000ea
DEFINE mov____%r2,0x32 04909fe5002089e5000000ea
# e92d0005 push {r0, r2}
# e5910000 ldr r0, [r1]
# e59f200c ldr r2, [pc, #12] ; 1c <X2>
# e0800002 add r0, r0, r2
# e5810000 str r0, [r1]
# e8bd0005 pop {r0, r2}
# ea000000 b 20 <Y2>
# X2: ???
# Y2:
DEFINE add____$i32,(%r1) 05002de9000091e50c209fe5020080e0000081e50500bde8000000ea
# e59f0000 ldr r0, [pc]
# ea000000 b c <R>
# nop
# R:
DEFINE mov____$i32,%r0 00009fe5000000ea
DEFINE mov____$i32,%r1 00109fe5000000ea
DEFINE mov____$i32,%r2 00209fe5000000ea
DEFINE mov____$i32,%r7 00709fe5000000ea
DEFINE mov____%r2,(%r1) 002081e5
DEFINE mov____%r3,%r0 0300a0e1
DEFINE mov____%r3,%r1 0e10a0e1
DEFINE mov____(%r0),%r0 000090e5
DEFINE mov____(%r0),%r2 002090e5
DEFINE mov____(%r1),%r1 001091e5
DEFINE nop 0000a0e1
DEFINE not____%r0 0000e0e1
DEFINE not____%r1 0110e0e1
DEFINE or_____%r1,%r0 010090e1 # orrs r0, r0, r1
DEFINE pop____%r0 04009de4
DEFINE pop____%r1 04109de4
DEFINE pop____%r3 04309de4
DEFINE pop____%lr 04e09de4
# e59f9004 ldr r9, [pc, #4] ; c <L1x>
# e52d9004 push {r9} ; (str r9, [sp, #-4]!)
# ea000000 b 10 <L1y>
# L1x: data
# L1y:
DEFINE push___$i32 04909fe504902de5000000ea
DEFINE push___%r0 04002de5 # str r0, [sp, #-4]!
DEFINE push___%r1 04102de5 # str r1, [sp, #-4]!
DEFINE push___%r2 04202de5 # str r2, [sp, #-4]!
DEFINE push___%r3 04302de5 # str r3, [sp, #-4]!
DEFINE push___%lr 04e02de5 # str lr, [sp, #-4]!
DEFINE sub____%r1,%r0 010050e0 # subs r0, r0, r1
DEFINE test___%r0,%r0 000010e1
DEFINE test___%r1,%r1 010011e1
DEFINE xor____$i8,%r0 0030e2 # eors r0, r0, #xx
DEFINE xor____%r0,%r0 000030e0 # eors r0, r0, r0
DEFINE xor____%r1,%r0 010030e0 # eors r0, r0, r1
DEFINE xor____%r1,%r1 011031e0 # eors r1, r1, r1
DEFINE xor____%r3,%r3 033033e0 # eors r3, r3, r3
# Note: These are the native ARM instructions.
# Note: i8 immediate
DEFINE ldr____%r0,(%fp,+#$i8) 009be5
DEFINE ldr____%r1,(%fp,+#$i8) 109be5
DEFINE ldr____%r2,(%fp,+#$i8) 209be5
DEFINE ldr____%r3,(%fp,+#$i8) 309be5
DEFINE ldr____%r4,(%fp,+#$i8) 409be5
DEFINE ldr____%r5,(%fp,+#$i8) 509be5
DEFINE ldr____%r7,(%fp,+#$i8) 709be5
DEFINE ldr____%fp,(%fp,+#$i8) b09be5
DEFINE ldr____%sp,(%fp,+#$i8) d09be5
DEFINE ldr____%lr,(%fp,+#$i8) e09be5
DEFINE ldr____%r0,(%fp,-#$i8) 001be5
DEFINE ldr____%r1,(%fp,-#$i8) 101be5
DEFINE ldr____%r2,(%fp,-#$i8) 201be5
DEFINE ldr____%r3,(%fp,-#$i8) 301be5
DEFINE ldr____%r4,(%fp,-#$i8) 401be5
DEFINE ldr____%r5,(%fp,-#$i8) 501be5
DEFINE ldr____%r7,(%fp,-#$i8) 701be5
DEFINE ldr____%fp,(%fp,-#$i8) b01be5
DEFINE ldr____%sp,(%fp,-#$i8) d01be5
DEFINE ldr____%lr,(%fp,-#$i8) e01be5
DEFINE str____%r0,(%fp,+#$i8) 008be5
DEFINE str____%r1,(%fp,+#$i8) 108be5
DEFINE str____%r2,(%fp,+#$i8) 208be5
DEFINE str____%r3,(%fp,+#$i8) 308be5
DEFINE str____%r4,(%fp,+#$i8) 408be5
DEFINE str____%r5,(%fp,+#$i8) 508be5
DEFINE str____%r7,(%fp,+#$i8) 708be5
DEFINE str____%fp,(%fp,+#$i8) b08be5
DEFINE str____%sp,(%fp,+#$i8) d08be5
DEFINE str____%lr,(%fp,+#$i8) e08be5
DEFINE str____%r0,(%fp,-#$i8) 000be5
DEFINE str____%r1,(%fp,-#$i8) 100be5
DEFINE str____%r2,(%fp,-#$i8) 200be5
DEFINE str____%r3,(%fp,-#$i8) 300be5
DEFINE str____%r4,(%fp,-#$i8) 400be5
DEFINE str____%r5,(%fp,-#$i8) 500be5
DEFINE str____%r7,(%fp,-#$i8) 700be5
DEFINE str____%fp,(%fp,-#$i8) b00be5
DEFINE str____%sp,(%fp,-#$i8) d00be5
DEFINE str____%lr,(%fp,-#$i8) e00be5
# Note: Loads INTO register r0 (ARM original operand order)
DEFINE ldrsb__%r0,(%r0) d000d0e1 # ldrsb r0, [r0]
DEFINE ldrsb__%r1,(%r1) d010d1e1 # ldrsb r1, [r1]
DEFINE ldrsb__%r2,(%r2) d020d2e1 # ldrsb r2, [r2]
DEFINE ldrsb__%r3,(%r3) d030d3e1 # ldrsb r3, [r3]
DEFINE ldrsb__%r4,(%r4) d040d4e1 # ldrsb r4, [r4]
DEFINE ldrsb__%r5,(%r5) d050d5e1 # ldrsb r5, [r5]
DEFINE ldrb___%r0,(%r1) 0000d1e5 # ldrb r0, [r1]
DEFINE ldrh___%r0,(%r0) b000d0e1 # ldrh r0, [r0]
DEFINE ldrh___%r0,(%r1) b000d1e1 # ldrh r0, [r1]
DEFINE ldrh___%r1,(%r1) b010d1e1 # ldrh r1, [r1]
DEFINE ldrh___%r2,(%r2) b020d2e1 # ldrh r2, [r2]
DEFINE ldrh___%r3,(%r3) b030d3e1 # ldrh r3, [r3]
DEFINE strb___%r0,(%r0) 0000c0e5 # strb r0, [r0]
DEFINE strb___%r0,(%r1) 0000c1e5 # strb r0, [r1]
DEFINE strb___%r1,(%r1) 0010c1e5 # strb r1, [r1]
DEFINE strb___%r2,(%r2) 0020c2e5 # strb r2, [r2]
DEFINE strb___%r3,(%r3) 0030c3e5 # strb r3, [r3]
DEFINE strb___%r4,(%r4) 0040c4e5 # strb r4, [r4]
DEFINE strb___%r0,(%fp,+#$i8) 00cbe5 # strb r0, [fp, +#xx]
DEFINE strb___%r0,(%fp,-#$i8) 004be5 # strb r0, [fp, -#xx]
DEFINE strh___%r0,(%r0) b000c0e1 # strh r0, [r0]
DEFINE strh___%r0,(%r1) b000c1e1 # strh r0, [r1]
DEFINE strh___%r1,(%r1) b010c1e1 # strh r1, [r1]
DEFINE strh___%r2,(%r2) b020c2e1 # strh r2, [r2]
DEFINE strh___%r3,(%r3) b030c3e1 # strh r3, [r3]
DEFINE strh___%r4,(%r4) b040c4e1 # strh r4, [r4]
# There's a single instruction that does it--but I don't know how to encode it.
# mov %r9, immediate
# add %r9, %r9, %fp
# strh %r0, [%r9]
DEFINE strh___%r0,(%fp,+#$i8) 90a0e30b9089e0b000c9e1
# There's a single instruction that does it--but I don't know how to encode it.
# e3a090xx mov %r9, immediate
# e05b9009 sub %r9, %fp, %r9
# e1c900b0 strh %r0, [%r9]
DEFINE strh___%r0,(%fp,-#$i8) 90a0e309904be0b000c9e1
DEFINE movle__%r0,$i8 00a0d3 # movle r0, #xx
DEFINE movlt__%r0,$i8 00a0b3 # movlt r0, #xx
DEFINE movge__%r0,$i8 00a0a3 # movge r0, #xx
DEFINE movgt__%r0,$i8 00a0c3 # movgt r0, #xx
DEFINE movcs__%r0,$i8 00a023 # movcs r0, #xx
DEFINE movcc__%r0,$i8 00a033 # movcc r0, #xx
DEFINE movhi__%r0,$i8 00a083 # movhi r0, #xx
DEFINE moveq__%r0,$i8 00a003 # moveq r0, #xx
DEFINE movle__%r1,$i8 10a0d3 # movle r1, #xx
DEFINE movlt__%r1,$i8 10a0b3 # movlt r1, #xx
DEFINE movge__%r1,$i8 10a0a3 # movge r1, #xx
DEFINE movgt__%r1,$i8 10a0c3 # movgt r1, #xx
DEFINE movcs__%r1,$i8 10a023 # movcs r1, #xx
DEFINE movcc__%r1,$i8 10a033 # movcc r1, #xx
DEFINE movhi__%r1,$i8 10a083 # movhi r1, #xx
DEFINE moveq__%r1,$i8 10a003 # moveq r1, #xx
DEFINE asr____%r0,%r0,%r1 5001a0e1 # asr %r0, %r0, %r1
DEFINE lsl____%r0,%r0,%r1 1001a0e1 # lsl %r0, %r0, %r1
DEFINE lsl____%r0,%r0,$i8 90a0e31009a0e1 # mov r9, #xx; lsl %r0, %r0, %r9
DEFINE lsl____%r1,%r1,$i8 90a0e31119a0e1 # mov r9, #xx; lsl %r1, %r1, %r9
DEFINE lsr____%r0,%r0,%r1 3001a0e1 # lsr %r0, %r0, %r1
DEFINE ldr____%r0,(%sp,#$i8) 009de5 # ldr r0, [r13+xx]
DEFINE ldr____%r1,(%sp,#$i8) 109de5 # ldr r1, [r13+xx]
#DEFINE add____%r2,%r0,%r1,lsl#4 012280e0
# Without carry
DEFINE add____%r2,%r0,%r1,lsl#2 012180e0
DEFINE add____%r2,%r1,%r0,lsl#2 002181e0
DEFINE add____%r1,$i8 1081e2
DEFINE add____%r2,$i8 2082e2
DEFINE bl eb
DEFINE b ea
DEFINE sxtb__%r0,%r0 7000afe6
DEFINE sxtb__%r1,%r1 7110afe6
DEFINE sxth__%r0,%r0 7000bfe6
DEFINE sxth__%r1,%r1 7110bfe6
DEFINE uxtb__%r0,%r0 7000efe6
DEFINE uxtb__%r1,%r1 7110efe6
DEFINE uxth__%r0,%r0 7000ffe6
DEFINE uxth__%r1,%r1 7110ffe6
# See: https://github.com/torvalds/linux/blob/v4.19/arch/arm/tools/syscall.tbl
DEFINE SYS_exit 01
DEFINE SYS_fork 02
DEFINE SYS_read 03
DEFINE SYS_write 04
DEFINE SYS_open 05
DEFINE SYS_close 06
# DEFINE SYS_waitpid does_not_exist
DEFINE SYS_rmdir 28
DEFINE SYS_wait4 72
# waitid: 0x118
DEFINE SYS_unlink 0a
DEFINE SYS_execve 0b
DEFINE SYS_chmod 0f
DEFINE SYS_lseek 13
DEFINE SYS_access 21
DEFINE SYS_brk 2d
DEFINE SYS_ioctl 36
DEFINE SYS_stat 6a
DEFINE SYS_fsync 76
DEFINE SYS_getcwd b7
# These are x86 ABI remnants:
DEFINE mul____%r1,%r0 910089e0 # umull r0, r9, r1, r0
DEFINE mul____%r0,%r1 910089e0 # umull r0, r9, r1, r0
DEFINE mov____%ebp,%r0 0b00a0e1
DEFINE mov____%ebp,%r1 0b10a0e1
DEFINE push___%ebp 04b02de5 # str fp, [sp, #-4]!
DEFINE pop____%ebp 04b09de4 # ldr fp, [sp], #4
DEFINE mov____%esp,%ebp 0db0a0e1 # mov fp, sp
DEFINE mov____%ebp,%esp 0bd0a0e1 # mov sp, fp
DEFINE sub____$i8,%esp d04de2 # sub sp, sp, #xx
DEFINE jmp____*%r1 11ff2fe1
# e59f9008 ldr r9, [pc, #8] ; 10 <LX1>
# e089900b add r9, r9, fp
# e5890000 str r0, [r9]
# ea000000 b 14 <LX2>
# 00000010 <LX1>: data
# 00000014 <LX2>:
DEFINE mov____%r0,0x32(%ebp) 08909fe50b9089e0000089e5000000ea
DEFINE mov____%r1,0x32(%ebp) 08909fe50b9089e0001089e5000000ea
DEFINE mov____%r2,0x32(%ebp) 08909fe50b9089e0002089e5000000ea
# e59f9004 ldr r9, [pc, #4] ; c <LX1>
# e5990000 ldr r0, [r9]
# ea000000 b 10 <LX2>
DEFINE mov____0x32,%r0 04909fe5000099e5000000ea
DEFINE mov____0x32,%r1 04909fe5001099e5000000ea
DEFINE mov____0x32,%r2 04909fe5002099e5000000ea
# e1a09000 mov r9, r0
# e1a00001 mov r0, r1
# e1a01009 mov r1, r9
DEFINE xchg___%r0,%r1 0090a0e10100a0e10910a0e1
# e49de004 pop {lr} ; (ldr lr, [sp], #4)
# e1a0f00e mov pc, lr
DEFINE ret 04e09de40ef0a0e1
# The flags are also updated, but that's probably useless.
DEFINE add____$i8,%esp d09de2
# e24ddeff sub sp, sp, #4080
# e24dd064 sub sp, sp, #100
DEFINE allocate_stack_4180 ffde4de264d04de2
DEFINE mov____0x32(%ebp),%r0 08909fe50b9089e0000099e5000000ea
# e59f9008 ldr r9, [pc, #8]
# e089900b add r9, r9, fp
# e5991000 ldr r1, [r9]
# ea000000 b 20 <VD>
# V: ...
# VD:
DEFINE mov____0x32(%ebp),%r1 08909fe50b9089e0001099e5000000ea
# e1a09000 mov r9, r0
# e59d0000 ldr r0, [sp]
# e58d9000 str r9, [sp]
DEFINE xchg___%r0,(%esp) 0090a0e100009de500908de5
# e52d1004 push {r1} ; (str r1, [sp, #-4]!)
# e59f1010 ldr r1, [pc, #16] ; 1c <WERT>
# e5909000 ldr r9, [r0]
# e0999001 adds r9, r9, r1
# e5809000 str r9, [r0]
# e49d1004 pop {r1} ; (ldr r1, [sp], #4)
# ea000000 b 20 <VD>
# V: ...
# VD:
DEFINE add____$i32,(%r0) 04102de510109fe5009090e5019099e0009080e504109de4000000ea
# mov %r9, #00
# push {%r9}
DEFINE push___0 0090a0e304902de5
DEFINE add____$i32,%r0 04909fe5090090e0000000ea
# e59f9004 ldr r9, [pc, #4] ; c <VALUE>
# e0911009 adds r1, r1, r9
# ea000000 b 10
# VALUE:
DEFINE add____$i32,%r1 04909fe5091091e0000000ea
DEFINE add____$i32,%r2 04909fe5092092e0000000ea
# e59f9008 ldr r9, [pc, #8] ; 10 <WERT>
# e089900b add r9, r9, fp
# e5c90000 strb r0, [r9]
# ea000000 b 14 <WERTD>
# WERT: nop
# WERTD:
DEFINE strb___%r0,0x32(%ebp) 08909fe50b9089e00000c9e5000000ea
DEFINE wfi 03f020e3