suckless/dwm - Unnamed repository; edit this file 'description' to name the repository.

diff options

Diffstat (limited to 'config.default.h')

-rw-r--r--

config.default.h

1 files changed, 1 insertions, 1 deletions

<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Mu - 117write-int-hex.subx</title> <meta name="Generator" content="Vim/8.2"> <meta name="plugin-version" content="vim8.1_v2"> <meta name="syntax" content="none"> <meta name="settings" content="number_lines,use_css,no_foldcolumn,expand_tabs,line_ids,prevent_copy=,use_input_for_pc=fallback"> <meta name="colorscheme" content="minimal-light"> <style>  </style> <script>  </script> </head> <body onload='JumpToLine();'> <a href='https://github.com/akkartik/mu/blob/main/117write-int-hex.subx'>https://github.com/akkartik/mu/blob/main/117write-int-hex.subx</a> <pre id='vimCodeElement'> 1 # Write out the (hex) textual representation of numbers. 2 3 == code 4 # instruction effective address register displacement immediate 5 # . op subop mod rm32 base index scale r32 6 # . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes 7 8 # convert the lowest nibble of eax to ascii and return it in the lowest byte of eax 9 to-hex-char: # in/eax: int -> out/eax: int 10 # no error checking; accepts argument in eax 11 # if (eax <= 9) return eax + '0' 12 3d/compare-eax-with 0x9/imm32/9 13 7f/jump-if-> $to-hex-char:else/disp8 14 05/add-to-eax 0x30/imm32/0 15 c3/return 16 $to-hex-char:else: 17 # otherwise return eax + 'a' - 10 18 05/add-to-eax 0x57/imm32/a-10 19 c3/return 20 21 append-byte-hex: # f: (addr stream byte), n: int 22 # . prologue 23 55/push-ebp 24 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp 25 # . save registers 26 50/push-eax 27 # AL = convert upper nibble to hex 28 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 0xc/disp8 . # copy *(ebp+12) to eax 29 c1/shift 5/subop/logic-right 3/mod/direct 0/rm32/eax . . . . . 4/imm8 # shift eax right by 4 bits, while padding zeroes 30 25/and-eax 0xf/imm32 31 # . AL = to-hex-char(AL) 32 e8/call <a href='117write-int-hex.subx.html#L9'>to-hex-char</a>/disp32 33 # append-byte(f, AL) 34 # . . push args 35 50/push-eax 36 ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) 37 # . . call 38 e8/call <a href='115write-byte.subx.html#L12'>append-byte</a>/disp32 39 # . . discard args 40 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp 41 # AL = convert lower nibble to hex 42 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 0xc/disp8 . # copy *(ebp+12) to eax 43 25/and-eax 0xf/imm32 44 # . AL = to-hex-char(AL) 45 e8/call <a href='117write-int-hex.subx.html#L9'>to-hex-char</a>/disp32 46 # append-byte(f, AL) 47 # . . push args 48 50/push-eax 49 ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) 50 # . . call 51 e8/call <a href='115write-byte.subx.html#L12'>append-byte</a>/disp32 52 # . . discard args 53 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp 54 $append-byte-hex:end: 55 # . restore registers 56 58/pop-to-eax 57 # . epilogue 58 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 59 5d/pop-to-ebp 60 c3/return 61 62 test-append-byte-hex: 63 # - check that append-byte-hex adds the hex textual representation 64 # setup 65 # . clear-stream(_test-stream) 66 # . . push args 67 68/push <a href='108write.subx.html#L125'>_test-stream</a>/imm32 68 # . . call 69 e8/call <a href='106stream.subx.html#L20'>clear-stream</a>/disp32 70 # . . discard args 71 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp 72 # append-byte-hex(_test-stream, 0xa) # exercises digit, non-digit as well as leading zero 73 # . . push args 74 68/push 0xa/imm32 75 68/push <a href='108write.subx.html#L125'>_test-stream</a>/imm32 76 # . . call 77 e8/call <a href='117write-int-hex.subx.html#L21'>append-byte-hex</a>/disp32 78 # . . discard args 79 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp 80 # check-stream-equal(_test-stream, "0a", msg) 81 # . . push args 82 68/push "F - test-append-byte-hex"/imm32 83 68/push "0a"/imm32 84 68/push <a href='108write.subx.html#L125'>_test-stream</a>/imm32 85 # . . call 86 e8/call <a href='109stream-equal.subx.html#L194'>check-stream-equal</a>/disp32 87 # . . discard args 88 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp 89 # . end 90 c3/return 91 92 write-int32-hex: # f: (addr stream byte), n: int 93 # . prologue 94 55/push-ebp 95 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp 96 $write-int32-hex:hex-prefix: 97 # write(f, "0x") 98 # . . push args 99 68/push "0x"/imm32 100 ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) 101 # . . call 102 e8/call <a href='108write.subx.html#L11'>write</a>/disp32 103 # . . discard args 104 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp 105 $write-int32-hex:rest: 106 # write-int32-hex-bits(f, n, 32) 107 # . . push args 108 68/push 0x20/imm32 109 ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12) 110 ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) 111 # . . call 112 e8/call <a href='117write-int-hex.subx.html#L123'>write-int32-hex-bits</a>/disp32 113 # . . discard args 114 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp 115 $write-int32-hex:end: 116 # . epilogue 117 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 118 5d/pop-to-ebp 119 c3/return 120 121 # print rightmost 'bits' of 'n' 122 # bits must be multiple of 4 123 write-int32-hex-bits: # f: (addr stream byte), n: int, bits: int 124 # pseudocode: 125 # bits -= 4 126 # while true 127 # if (bits < 0) break 128 # eax = n >> bits 129 # eax = eax & 0xf 130 # append-byte(f, AL) 131 # bits -= 4 132 # 133 # . prologue 134 55/push-ebp 135 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp 136 # . save registers 137 50/push-eax 138 51/push-ecx 139 # ecx = bits-4 140 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 0x10/disp8 . # copy *(ebp+16) to ecx 141 81 5/subop/subtract 3/mod/direct 1/rm32/ecx . . . . . 4/imm32 # subtract from ecx 142 $write-int32-hex-bits:loop: 143 # if (bits < 0) break 144 81 7/subop/compare 3/mod/direct 1/rm32/ecx . . . . . 0/imm32 # compare ecx 145 7c/jump-if-< $write-int32-hex-bits:end/disp8 146 # eax = n >> bits 147 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 0xc/disp8 . # copy *(ebp+12) to eax 148 d3/>>ecx 5/subop/pad-zeroes 3/mod/direct 0/rm32/eax . . . . . . # shift eax right by ecx bits, padding zeroes 149 # eax = to-hex-char(AL) 150 25/and-eax 0xf/imm32 151 e8/call <a href='117write-int-hex.subx.html#L9'>to-hex-char</a>/disp32 152 # append-byte(f, AL) 153 # . . push args 154 50/push-eax 155 ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) 156 # . . call 157 e8/call <a href='115write-byte.subx.html#L12'>append-byte</a>/disp32 158 # . . discard args 159 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp 160 # bits -= 4 161 81 5/subop/subtract 3/mod/direct 1/rm32/ecx . . . . . 4/imm32 # subtract from ecx 162 eb/jump $write-int32-hex-bits:loop/disp8 163 $write-int32-hex-bits:end: 164 # . restore registers 165 59/pop-to-ecx 166 58/pop-to-eax 167 # . epilogue 168 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 169 5d/pop-to-ebp 170 c3/return 171 172 test-write-int32-hex: 173 # - check that write-int32-hex prints the hex textual representation 174 # setup 175 # . clear-stream(_test-stream) 176 # . . push args 177 68/push <a href='108write.subx.html#L125'>_test-stream</a>/imm32 178 # . . call 179 e8/call <a href='106stream.subx.html#L20'>clear-stream</a>/disp32 180 # . . discard args 181 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp 182 # write-int32-hex(_test-stream, 0x8899aa) 183 # . . push args 184 68/push 0x8899aa/imm32 185 68/push <a href='108write.subx.html#L125'>_test-stream</a>/imm32 186 # . . call 187 e8/call <a href='117write-int-hex.subx.html#L92'>write-int32-hex</a>/disp32 188 # . . discard args 189 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp 190 # check-stream-equal(_test-stream, "0x008899aa", msg) 191 # . . push args 192 68/push "F - test-write-int32-hex"/imm32 193 68/push "0x008899aa"/imm32 194 68/push <a href='108write.subx.html#L125'>_test-stream</a>/imm32 195 # . . call 196 e8/call <a href='109stream-equal.subx.html#L194'>check-stream-equal</a>/disp32 197 # . . discard args 198 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp 199 # . end 200 c3/return 201 202 # . . vim:nowrap:textwidth=0 </pre> </body> </html>


context:
space:
mode: