84 lines
2.0 KiB
C
84 lines
2.0 KiB
C
#pragma once
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#define _inline inline __attribute__((always_inline))
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static _inline unsigned short inports(unsigned short _port) {
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unsigned short rv;
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asm volatile ("inw %1, %0" : "=a" (rv) : "dN" (_port));
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return rv;
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}
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static _inline void outports(unsigned short _port, unsigned short _data) {
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asm volatile ("outw %1, %0" : : "dN" (_port), "a" (_data));
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}
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static _inline unsigned int inportl(unsigned short _port) {
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unsigned int rv;
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asm volatile ("inl %%dx, %%eax" : "=a" (rv) : "dN" (_port));
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return rv;
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}
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static _inline void outportl(unsigned short _port, unsigned int _data) {
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asm volatile ("outl %%eax, %%dx" : : "dN" (_port), "a" (_data));
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}
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static _inline unsigned char inportb(unsigned short _port) {
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unsigned char rv;
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asm volatile ("inb %1, %0" : "=a" (rv) : "dN" (_port));
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return rv;
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}
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static _inline void outportb(unsigned short _port, unsigned char _data) {
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asm volatile ("outb %1, %0" : : "dN" (_port), "a" (_data));
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}
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static _inline void inportsm(unsigned short port, unsigned char * data, unsigned long size) {
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asm volatile ("rep insw" : "+D" (data), "+c" (size) : "d" (port) : "memory");
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}
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static _inline void * memcpy(void * restrict dest, const void * restrict src, long n) {
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asm volatile("cld; rep movsb"
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: "=c"((int){0})
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: "D"(dest), "S"(src), "c"(n)
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: "flags", "memory");
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return dest;
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}
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static _inline void * memset(void * dest, int c, long n) {
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asm volatile("cld; rep stosb"
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: "=c"((int){0})
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: "D"(dest), "a"(c), "c"(n)
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: "flags", "memory");
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return dest;
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}
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static int strcmp(const char * l, const char * r) {
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for (; *l == *r && *l; l++, r++);
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return *(unsigned char *)l - *(unsigned char *)r;
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}
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static char * strchr(const char * s, int c) {
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while (*s) {
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if (*s == c) {
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return (char *)s;
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}
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s++;
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}
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return 0;
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}
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static char * strcat(char *dest, const char *src) {
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char * end = dest;
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while (*end != '\0') {
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++end;
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}
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while (*src) {
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*end = *src;
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end++;
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src++;
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}
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*end = '\0';
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return dest;
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}
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