add sbc_d8()

1 files changed, 11 insertions, 1 deletions

diff --git a/ops.yaml b/ops.yaml
index 3d6f7b8..71489b5 100644
--- a/ops.yaml
+++ b/ops.yaml
@@ -3579,6 +3579,8 @@ ops:
       hex: 0xDD
       cat: "invalid"
       op: XX
+      code: |
+        cpu_set_state(ctx, old_pc, GB_CPU_STATE_INVALID);
     - id: SBC A, d8
       hex: 0xDE
       cat: "8-bit math"
@@ -3594,7 +3596,7 @@ ops:
         h: H
         c: C
       code: |
-        cpu_set_state(ctx, old_pc, GB_CPU_STATE_INVALID);
+        sbc_d8(ctx, old_pc + 1);
     - id: RST 18H
       hex: 0xDF
       cat: "jumps/calls"
@@ -9503,6 +9505,14 @@ templates:
     }
 
     static void
+    sbc_d8(
+      gb_t * const ctx,
+      const uint16_t addr
+    ) {
+      sbc(ctx, mmu_rb(ctx, addr));
+    }
+
+    static void
     and(
       gb_t * const ctx,
       const uint8_t val