Difference between revisions of "A(0x3c) putchar"
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000040ec: 810873d1 lb r8,0x73d1(r8) | 000040ec: 810873d1 lb r8,0x73d1(r8) | ||
000040f0: 00000000 nop | 000040f0: 00000000 nop | ||
| − | 000040f4: 31090097 andi r9,r8,0x0097 | + | 000040f4: 31090097 andi r9,r8,0x0097 check flags 0x10 (grammar), 0x4 (number), 0x2 (lowercase), 0x1 (uppercase) and 0x80. |
| − | 000040f8: 11200007 beq r9,r0,0x00004118 branch if not any of those (assumedly.) | + | 000040f8: 11200007 beq r9,r0,0x00004118 branch if not any of those. (assumedly. this doesn't actually work though) |
000040fc: 24040001 addiu r4,r0,0x0001 | 000040fc: 24040001 addiu r4,r0,0x0001 | ||
00004100: 3c0a0001 lui r10,0x0001 | 00004100: 3c0a0001 lui r10,0x0001 | ||
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00004114: 24040001 addiu r4,r0,0x0001 1 | 00004114: 24040001 addiu r4,r0,0x0001 1 | ||
00004118: 27a50018 addiu r5,r29,0x0018 temp. | 00004118: 27a50018 addiu r5,r29,0x0018 temp. | ||
| − | 0000411c: 0c000b25 jal 0x00002c94 [[A(0x03) write]] (1, src = sp + 0x18, length = 1) | + | 0000411c: 0c000b25 jal 0x00002c94 [[A(0x03) write]] (1, src = sp + 0x18, length = 1) |
00004120: 24060001 addiu r6,r0,0x0001 length = 1 | 00004120: 24060001 addiu r6,r0,0x0001 length = 1 | ||
00004124: 8fbf0014 lw r31,0x0014(r29) | 00004124: 8fbf0014 lw r31,0x0014(r29) | ||
Latest revision as of 08:46, 24 September 2024
0000406c: 27bdffe8 addiu r29,r29,-0x0018 00004070: afa40018 sw r4,0x0018(r29) 00004074: 83ae0018 lb r14,0x0018(r29) 00004078: 24010009 addiu r1,r0,0x0009 0000407c: 11c10009 beq r14,r1,0x000040a4 branch if character to write == Horz Tab. 00004080: afbf0014 sw r31,0x0014(r29)
Line feed:
00004084: 2401000a addiu r1,r0,0x000a 00004088: 15c10016 bne r14,r1,0x000040e4 branch if character to write != Line Feed (BUGGED? should point to 0x40e0; r25 contains garbage data otherwise.) 0000408c: 93b90018 lbu r25,0x0018(r29) 00004090: 0c00101b jal 0x0000406c A(0x3c) putchar <-- self reference? 00004094: 2404000d addiu r4,r0,0x000d putchar('carriage return') 00004098: 3c010001 lui r1,0x0001 0000409c: 1000001d beq r0,r0,0x00004114 branch always 000040a0: ac208910 sw r0,-0x76f0(r1) set current write pos. to 0
Horizontal tab:
000040a4: 0c00101b jal 0x0000406c A(0x3c) putchar <-- self reference? 000040a8: 24040020 addiu r4,r0,0x0020 putchar('space') 000040ac: 3c0f0001 lui r15,0x0001 000040b0: 8def8910 lw r15,-0x76f0(r15) current write pos. 000040b4: 00000000 nop 000040b8: 00000000 nop 000040bc: 05e10004 bgez r15,0x000040d0 branch if > 0 000040c0: 31f80007 andi r24,r15,0x0007 is not at tab boundary? 000040c4: 13000002 beq r24,r0,0x000040d0 branch if at tab boundary 000040c8: 00000000 nop 000040cc: 2718fff8 addiu r24,r24,-0x0008 if not at tab boundary, -0x8 000040d0: 1700fff4 bne r24,r0,0x000040a4 loop until at tabulation boundary 000040d4: 00000000 nop 000040d8: 10000013 beq r0,r0,0x00004128 end 000040dc: 8fbf0014 lw r31,0x0014(r29)
000040e0: 93b90018 lbu r25,0x0018(r29) unreachable
other chars.:
000040e4: 3c080000 lui r8,0x0000 000040e8: 01194021 addu r8,r8,r25 ? r25 contains garbage data here. branch is not set properly? 000040ec: 810873d1 lb r8,0x73d1(r8) 000040f0: 00000000 nop 000040f4: 31090097 andi r9,r8,0x0097 check flags 0x10 (grammar), 0x4 (number), 0x2 (lowercase), 0x1 (uppercase) and 0x80. 000040f8: 11200007 beq r9,r0,0x00004118 branch if not any of those. (assumedly. this doesn't actually work though) 000040fc: 24040001 addiu r4,r0,0x0001 00004100: 3c0a0001 lui r10,0x0001 00004104: 8d4a8910 lw r10,-0x76f0(r10) current write pos. 00004108: 3c010001 lui r1,0x0001 0000410c: 254b0001 addiu r11,r10,0x0001 + 1 00004110: ac2b8910 sw r11,-0x76f0(r1) write pos + 1 00004114: 24040001 addiu r4,r0,0x0001 1 00004118: 27a50018 addiu r5,r29,0x0018 temp. 0000411c: 0c000b25 jal 0x00002c94 A(0x03) write (1, src = sp + 0x18, length = 1) 00004120: 24060001 addiu r6,r0,0x0001 length = 1 00004124: 8fbf0014 lw r31,0x0014(r29) 00004128: 27bd0018 addiu r29,r29,0x0018 0000412c: 03e00008 jr r31 00004130: 00000000 nop
