70 lines
1.5 KiB
C
70 lines
1.5 KiB
C
#include <utils.h>
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#include <syscalls.h>
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#include <opcode.h>
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#include <string.h>
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//TODO:
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// - move me !
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// - attribute always inline ?
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static INLINE int get_shift(uint16_t mask)
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{
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int i;
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if (mask == 0x0000)
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return (0);
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i = -1;
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while (++i < 16 && !(mask & (0x01 << i)));
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return (i);
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}
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static void get_mnemonic(char *str, uint16_t bytes_code)
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{
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int shift[ARGUMENTS_MAX];
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size_t i;
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size_t j;
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i = -1;
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while (opcode[++i].name != NULL
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&& (bytes_code & opcode[i].mask) != opcode[i].code);
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if (opcode[i].name == NULL){
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strcpy(str, "????");
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return;
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}
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j = -1;
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while (++j < ARGUMENTS_MAX)
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shift[j] = get_shift(opcode[i].arg_mask[j]);
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//TODO: update this.
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sprintf(str, opcode[i].name,
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(bytes_code & opcode[i].arg_mask[0]) >> shift[0],
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(bytes_code & opcode[i].arg_mask[1]) >> shift[1],
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(bytes_code & opcode[i].arg_mask[2]) >> shift[2]);
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}
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//TODO:
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// - resize buffer.
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// - handle multiple modes.
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void display_instructions(const struct session_s *session)
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{
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char mnemonic[128];
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uint16_t *area;
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char buf[64];
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size_t y;
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if (session->mode == COMMAND){
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restore_window(1);
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return;
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}
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if (session->mode == UNUSED || session->anchor == 0x00000000){
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print((SCREEN_WIDTH >> 1) - ((sizeof("Empty session") * FONT_WIDTH) >> 1),
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(SCREEN_HEIGHT >> 1) - (FONT_HEIGHT >> 1), "Empty session");
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return;
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}
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y = -1;
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area = (void*)(session->anchor + session->cursor);
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while (++y < LINE_OFFSET){
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get_mnemonic(mnemonic, area[y]);
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sprintf(buf, "%4x %4x %s", &(area[y]), area[y], mnemonic);
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print(0, y * FONT_HEIGHT, buf);
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}
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}
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