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      1 /* -----------------------------------------------------------------------
      2  *
      3  *   Copyright 1994-2008 H. Peter Anvin - All Rights Reserved
      4  *
      5  *   This program is free software; you can redistribute it and/or modify
      6  *   it under the terms of the GNU General Public License as published by
      7  *   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
      8  *   Boston MA 02111-1307, USA; either version 2 of the License, or
      9  *   (at your option) any later version; incorporated herein by reference.
     10  *
     11  * -----------------------------------------------------------------------
     12  */
     13 #include <core.h>
     14 
     15 /*
     16  * writehex.c
     17  *
     18  * Write hexadecimal numbers to the console
     19  *
     20  */
     21 
     22 static inline void __writehex(uint32_t h, int digits)
     23 {
     24 	while (digits) {
     25 		uint8_t shift;
     26 		uint8_t al;
     27 
     28 		shift = --digits;
     29 		al = ((h & 0x0f << shift) >> shift);
     30 		if (al < 10)
     31 			al += '0';
     32 		else
     33 			al += 'A' - 10;
     34 
     35 		writechr(al);
     36 	}
     37 }
     38 
     39 /*
     40  * writehex[248]: Write a hex number in (AL, AX, EAX) to the console
     41  */
     42 void writehex2(uint32_t h)
     43 {
     44 	__writehex(h, 2);
     45 }
     46 
     47 void writehex4(uint8_t h)
     48 {
     49 	__writehex(h, 4);
     50 }
     51 
     52 void writehex8(uint8_t h)
     53 {
     54 	__writehex(h, 8);
     55 }
     56 
     57 void pm_writehex2(com32sys_t *regs)
     58 {
     59 	writehex2(regs->eax.b[0]);
     60 }
     61 
     62 void pm_writehex4(com32sys_t *regs)
     63 {
     64 	writehex4(regs->eax.w[0]);
     65 }
     66 
     67 void pm_writehex8(com32sys_t *regs)
     68 {
     69 	writehex8(regs->eax.l);
     70 }
     71