abdelrahman/performance-aware-programming
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base: abdelrahman:c320371432b9d87142971aa1586ec827675a0a33
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abdelrahman:main
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compare: abdelrahman:e9d7a608f011d2ee0fa2481ab0dff734ddaa1004
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abdelrahman:main

3 Commits
c320371432 ... e9d7a608f0

Author SHA1 Message Date
Abdelrahman Said
e9d7a608f0 Removed the binary from source control 2023-04-15 23:10:08 -07:00
Abdelrahman Said
d980153185 Read the instructions into simulated memory instead of separate buffer 2023-04-15 23:08:14 -07:00
Abdelrahman Said
90128fae8f Added sim86 binary to .gitignore 2023-04-15 23:07:08 -07:00
3 changed files with 8 additions and 5 deletions
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1
8086_sim/.gitignore vendored
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@ -1,3 +1,4 @@
sim86
listing_0043_immediate_movs listing_0043_immediate_movs
listing_0044_register_movs listing_0044_register_movs
listing_0045_challenge_register_movs listing_0045_challenge_register_movs

BIN
8086_sim/sim86
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Binary file not shown.

12
8086_sim/sim86.cpp
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@ -6,6 +6,8 @@
#include <stdio.h> #include <stdio.h>
#include <string.h> #include <string.h>
#define MEM_SIZE (1 << 16)
struct basic_string { struct basic_string {
char str[4096]; char str[4096];
}; };
@ -22,6 +24,9 @@ int main(int argc, char *argv[]) {
return 1; return 1;
} }
u8 memory[MEM_SIZE];
memset((void *)memory, 0, MEM_SIZE);
const char *filename = argv[1]; const char *filename = argv[1];
printf("Filename: %s\n", filename); printf("Filename: %s\n", filename);
@ -37,10 +42,7 @@ int main(int argc, char *argv[]) {
fseek(fp, 0, SEEK_SET); fseek(fp, 0, SEEK_SET);
u8 buffer[size + 1]; fread((void *)memory, sizeof(u8), size, fp);
memset((void *)buffer, 0, size + 1);
fread((void *)buffer, sizeof(u8), size, fp);
fclose(fp); fclose(fp);
@ -55,7 +57,7 @@ int main(int argc, char *argv[]) {
while (offset < size) { while (offset < size) {
instruction decoded; instruction decoded;
Sim86_Decode8086Instruction(size - offset, buffer + offset, &decoded); Sim86_Decode8086Instruction(size - offset, memory + offset, &decoded);
if (decoded.Op) { if (decoded.Op) {
offset += decoded.Size; offset += decoded.Size;