diff --git a/common/lib/mem.asm_aarch64 b/common/lib/mem.asm_aarch64
deleted file mode 100644
index fa632984..00000000
--- a/common/lib/mem.asm_aarch64
+++ /dev/null
@@ -1,66 +0,0 @@
-.section .text
-
-.global memcpy
-memcpy:
-    mov x3, x0
-0:
-    cbz x2, 1f
-    ldrb w4, [x1], #1
-    strb w4, [x0], #1
-    sub x2, x2, #1
-    b 0b
-1:
-    mov x0, x3
-    ret
-
-.global memset
-memset:
-    mov x3, x0
-0:
-    cbz x2, 1f
-    strb w1, [x0], #1
-    sub x2, x2, #1
-    b 0b
-1:
-    mov x0, x3
-    ret
-
-.global memmove
-memmove:
-    mov x3, x0
-    mov x5, x2
-
-    cmp x0, x1
-    b.gt 1f
-0:
-    cbz x2, 2f
-    ldrb w4, [x1], #1
-    strb w4, [x0], #1
-    sub x2, x2, #1
-    b 0b
-1:
-    sub x5, x5, #1
-    cbz x2, 2f
-    ldrb w4, [x1, x5]
-    strb w4, [x0, x5]
-    sub x2, x2, #1
-    b 1b
-2:
-    mov x0, x3
-    ret
-
-.global memcmp
-memcmp:
-    mov x3, xzr
-0:
-    cbz x2, 1f
-    ldrb w3, [x0], #1
-    ldrb w4, [x1], #1
-    sub w3, w3, w4
-    cbnz w3, 1f
-    sub x2, x2, #1
-    b 0b
-1:
-    sxtw x0, w3
-    mov x0, x3
-    ret
diff --git a/common/lib/mem.asm_x86_64 b/common/lib/mem.asm_x86_64
deleted file mode 100644
index 4463c197..00000000
--- a/common/lib/mem.asm_x86_64
+++ /dev/null
@@ -1,55 +0,0 @@
-section .text
-
-global memcpy
-memcpy:
-    mov rcx, rdx
-    mov rax, rdi
-    rep movsb
-    ret
-
-global memset
-memset:
-    push rdi
-    mov rax, rsi
-    mov rcx, rdx
-    rep stosb
-    pop rax
-    ret
-
-global memmove
-memmove:
-    mov rcx, rdx
-    mov rax, rdi
-
-    cmp rdi, rsi
-    ja .copy_backwards
-
-    rep movsb
-    jmp .done
-
-  .copy_backwards:
-    lea rdi, [rdi+rcx-1]
-    lea rsi, [rsi+rcx-1]
-    std
-    rep movsb
-    cld
-
-  .done:
-    ret
-
-global memcmp
-memcmp:
-    mov rcx, rdx
-    repe cmpsb
-    je .equal
-
-    mov al, byte [rdi-1]
-    sub al, byte [rsi-1]
-    movsx rax, al
-    jmp .done
-
-  .equal:
-    xor eax, eax
-
-  .done:
-    ret
diff --git a/common/lib/mem.s2.asm_ia32 b/common/lib/mem.s2.asm_ia32
index c4452247..3c960dff 100644
--- a/common/lib/mem.s2.asm_ia32
+++ b/common/lib/mem.s2.asm_ia32
@@ -1,79 +1,3 @@
-section .text
-
-global memcpy
-memcpy:
-    push esi
-    push edi
-    mov eax, dword [esp+12]
-    mov edi, eax
-    mov esi, dword [esp+16]
-    mov ecx, dword [esp+20]
-    rep movsb
-    pop edi
-    pop esi
-    ret
-
-global memset
-memset:
-    push edi
-    mov edx, dword [esp+8]
-    mov edi, edx
-    mov eax, dword [esp+12]
-    mov ecx, dword [esp+16]
-    rep stosb
-    mov eax, edx
-    pop edi
-    ret
-
-global memmove
-memmove:
-    push esi
-    push edi
-    mov eax, dword [esp+12]
-    mov edi, eax
-    mov esi, dword [esp+16]
-    mov ecx, dword [esp+20]
-
-    cmp edi, esi
-    ja .copy_backwards
-
-    rep movsb
-    jmp .done
-
-  .copy_backwards:
-    lea edi, [edi+ecx-1]
-    lea esi, [esi+ecx-1]
-    std
-    rep movsb
-    cld
-
-  .done:
-    pop edi
-    pop esi
-    ret
-
-global memcmp
-memcmp:
-    push esi
-    push edi
-    mov edi, dword [esp+12]
-    mov esi, dword [esp+16]
-    mov ecx, dword [esp+20]
-    repe cmpsb
-    je .equal
-    mov al, byte [edi-1]
-    sub al, byte [esi-1]
-    movsx eax, al
-    jmp .done
-
-  .equal:
-    xor eax, eax
-
-  .done:
-    pop edi
-    pop esi
-    ret
-
 global memcpy32to64
 memcpy32to64:
     push ebp
diff --git a/common/lib/memory.s2.c b/common/lib/memory.s2.c
new file mode 100644
index 00000000..6d530115
--- /dev/null
+++ b/common/lib/memory.s2.c
@@ -0,0 +1,53 @@
+#include <stdint.h>
+#include <stddef.h>
+
+void *memcpy(void *dest, const void *src, size_t n) {
+    uint8_t *pdest = (uint8_t *)dest;
+    const uint8_t *psrc = (const uint8_t *)src;
+
+    for (size_t i = 0; i < n; i++) {
+        pdest[i] = psrc[i];
+    }
+
+    return dest;
+}
+
+void *memset(void *s, int c, size_t n) {
+    uint8_t *p = (uint8_t *)s;
+
+    for (size_t i = 0; i < n; i++) {
+        p[i] = (uint8_t)c;
+    }
+
+    return s;
+}
+
+void *memmove(void *dest, const void *src, size_t n) {
+    uint8_t *pdest = (uint8_t *)dest;
+    const uint8_t *psrc = (const uint8_t *)src;
+
+    if (src > dest) {
+        for (size_t i = 0; i < n; i++) {
+            pdest[i] = psrc[i];
+        }
+    } else if (src < dest) {
+        for (size_t i = n; i > 0; i--) {
+            pdest[i-1] = psrc[i-1];
+        }
+    }
+
+    return dest;
+}
+
+int memcmp(const void *s1, const void *s2, size_t n) {
+    const uint8_t *p1 = (const uint8_t *)s1;
+    const uint8_t *p2 = (const uint8_t *)s2;
+
+    for (size_t i = 0; i < n; i++) {
+        if (p1[i] != p2[i]) {
+            return p1[i] < p2[i] ? -1 : 1;
+        }
+    }
+
+    return 0;
+}
diff --git a/decompressor/mem.asm b/decompressor/mem.asm
deleted file mode 100644
index d3a7d9e7..00000000
--- a/decompressor/mem.asm
+++ /dev/null
@@ -1,75 +0,0 @@
-section .text
-
-global memcpy
-memcpy:
-    push esi
-    push edi
-    mov eax, dword [esp+12]
-    mov edi, eax
-    mov esi, dword [esp+16]
-    mov ecx, dword [esp+20]
-    rep movsb
-    pop edi
-    pop esi
-    ret
-
-global memset
-memset:
-    push edi
-    mov edx, dword [esp+8]
-    mov edi, edx
-    mov eax, dword [esp+12]
-    mov ecx, dword [esp+16]
-    rep stosb
-    mov eax, edx
-    pop edi
-    ret
-
-global memmove
-memmove:
-    push esi
-    push edi
-    mov eax, dword [esp+12]
-    mov edi, eax
-    mov esi, dword [esp+16]
-    mov ecx, dword [esp+20]
-
-    cmp edi, esi
-    ja .copy_backwards
-
-    rep movsb
-    jmp .done
-
-  .copy_backwards:
-    lea edi, [edi+ecx-1]
-    lea esi, [esi+ecx-1]
-    std
-    rep movsb
-    cld
-
-  .done:
-    pop edi
-    pop esi
-    ret
-
-global memcmp
-memcmp:
-    push esi
-    push edi
-    mov edi, dword [esp+12]
-    mov esi, dword [esp+16]
-    mov ecx, dword [esp+20]
-    repe cmpsb
-    je .equal
-    mov al, byte [edi-1]
-    sub al, byte [esi-1]
-    movsx eax, al
-    jmp .done
-
-  .equal:
-    xor eax, eax
-
-  .done:
-    pop edi
-    pop esi
-    ret
diff --git a/decompressor/memory.c b/decompressor/memory.c
new file mode 100644
index 00000000..6d530115
--- /dev/null
+++ b/decompressor/memory.c
@@ -0,0 +1,53 @@
+#include <stdint.h>
+#include <stddef.h>
+
+void *memcpy(void *dest, const void *src, size_t n) {
+    uint8_t *pdest = (uint8_t *)dest;
+    const uint8_t *psrc = (const uint8_t *)src;
+
+    for (size_t i = 0; i < n; i++) {
+        pdest[i] = psrc[i];
+    }
+
+    return dest;
+}
+
+void *memset(void *s, int c, size_t n) {
+    uint8_t *p = (uint8_t *)s;
+
+    for (size_t i = 0; i < n; i++) {
+        p[i] = (uint8_t)c;
+    }
+
+    return s;
+}
+
+void *memmove(void *dest, const void *src, size_t n) {
+    uint8_t *pdest = (uint8_t *)dest;
+    const uint8_t *psrc = (const uint8_t *)src;
+
+    if (src > dest) {
+        for (size_t i = 0; i < n; i++) {
+            pdest[i] = psrc[i];
+        }
+    } else if (src < dest) {
+        for (size_t i = n; i > 0; i--) {
+            pdest[i-1] = psrc[i-1];
+        }
+    }
+
+    return dest;
+}
+
+int memcmp(const void *s1, const void *s2, size_t n) {
+    const uint8_t *p1 = (const uint8_t *)s1;
+    const uint8_t *p2 = (const uint8_t *)s2;
+
+    for (size_t i = 0; i < n; i++) {
+        if (p1[i] != p2[i]) {
+            return p1[i] < p2[i] ? -1 : 1;
+        }
+    }
+
+    return 0;
+}