Hi there,
I found this while debugging app compliled by tcc (i386).
char *mbc_s;
int16_t B2 = *((int16_t*)mbc_s);
----------
Use monospaced font please.
CPU Disasm
Address Hex dump Command Comments
0040106F |. 8B45 F8 MOV EAX,DWORD PTR SS:[LOCAL.2] ; !
00401072 |. 0FBF08 MOVSX ECX,WORD PTR DS:[EAX]
00401075 |. 66:894D F0 MOV WORD PTR SS:[LOCAL.4],CX
00401079 |. 8B45 F8 MOV EAX,DWORD PTR SS:[LOCAL.2] ; <== dup?
0040107C |. 0FBF4D F0 MOVSX ECX,WORD PTR SS:[LOCAL.4]
00401080 |. 51 PUSH ECX ; /<%d>
00401081 |. 0FBE08 MOVSX ECX,BYTE PTR DS:[EAX] ; |
00401084 |. 51 PUSH ECX ; |<%c>
00401085 |. B8 28204000 MOV EAX,OFFSET 00402028 ; |ASCII
"%c:\t%d\n"
0040108A |. 50 PUSH EAX ; |format
=> "%c:\t%d\n"
0040108B |. E8 00020000 CALL <JMP.&msvcrt.printf> ;
\MSVCRT.printf
----------
I don't know much about ASM and how tcc translates c code into ASM. If the 2nd
MOV is not necessary, can we optimize it in tcc?
_______________________________________________
Tinycc-devel mailing list
[email protected]
https://lists.nongnu.org/mailman/listinfo/tinycc-devel
