From 42e9b31e0d7324106a65ad9ff42ea2377a80fa51 Mon Sep 17 00:00:00 2001
From: dweller <dweller@cabin.digital>
Date: Wed, 26 Mar 2025 18:25:34 +0200
Subject: fix disasm not showing instruction hex; implement a few instructions
 exec; add report logger

---
 sources/meta/exec.c | 82 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 sources/meta/exec.c

(limited to 'sources/meta/exec.c')

diff --git a/sources/meta/exec.c b/sources/meta/exec.c
new file mode 100644
index 0000000..69e9a8a
--- /dev/null
+++ b/sources/meta/exec.c
@@ -0,0 +1,82 @@
+#define BEGIN           \
+do{                     \
+    chip8* c8 = usrdat; \
+    assert(c8);
+
+#define END }while(0)
+
+#define X_C8_ILL                                                        \
+BEGIN                                                                   \
+                                                                        \
+    c8->running = false;                                                \
+    report(ERR, "Illegal instruction (%04X) @ %04X\n", instr, offset);  \
+END
+
+#define X_C8_CLS       X_C8_ILL
+#define X_C8_RET       X_C8_ILL
+#define X_C8_SYS       X_C8_ILL
+
+#define X_C8_JP       \
+BEGIN                 \
+    c8->pc = nnn - 2; \
+END
+
+#define X_C8_CALL      X_C8_ILL
+#define X_C8_LDI       X_C8_ILL
+#define X_C8_JPV       X_C8_ILL
+
+#define X_C8_SEB                    \
+BEGIN                               \
+    if(c8->V[x] == kk) c8->pc += 2; \
+END
+
+#define X_C8_SNEB      X_C8_ILL
+
+#define X_C8_LD    \
+BEGIN              \
+    c8->V[x] = kk; \
+END
+
+#define X_C8_ADDB                      \
+BEGIN                                  \
+    int tmp = (int)c8->V[x] + (int)kk; \
+    c8->V[x] = tmp & 0xFF;             \
+END
+
+#define X_C8_RND       X_C8_ILL
+#define X_C8_SKP       X_C8_ILL
+#define X_C8_SKNP      X_C8_ILL
+#define X_C8_MVDT      X_C8_ILL
+#define X_C8_LDK       X_C8_ILL
+#define X_C8_LDDT      X_C8_ILL
+#define X_C8_LDST      X_C8_ILL
+#define X_C8_ADDI      X_C8_ILL
+#define X_C8_HEX       X_C8_ILL
+#define X_C8_BCD       X_C8_ILL
+#define X_C8_SAVE      X_C8_ILL
+#define X_C8_RESTORE   X_C8_ILL
+#define X_C8_SE        X_C8_ILL
+#define X_C8_MOVE      X_C8_ILL
+#define X_C8_OR        X_C8_ILL
+#define X_C8_AND       X_C8_ILL
+#define X_C8_XOR       X_C8_ILL
+
+#define X_C8_ADD                             \
+BEGIN                                        \
+    int tmp = (int)c8->V[x] + (int)c8->V[y]; \
+    c8->V[0xf] = (tmp > 255);                \
+    c8->V[x] = tmp & 0xFF;                   \
+END
+
+#define X_C8_SUB       X_C8_ILL
+#define X_C8_SHR       X_C8_ILL
+#define X_C8_SUBN      X_C8_ILL
+#define X_C8_SHL       X_C8_ILL
+#define X_C8_SNE       X_C8_ILL
+#define X_C8_DRW       X_C8_ILL
+
+c8_decode_generate(exec)
+
+#undef BEGIN
+#undef END
+#include "undef.c"
-- 
cgit v1.2.3