Changeset 845

Timestamp:

02/08/07 20:51:41 (2 years ago)

Author:

common

Message:

libemu

• add result{8,16,32}_flags_update(struct emu_cpu *c, uint{8,16,32}_t result);
  

Files:

• libemu/trunk/include/emu/emu_cpu.h (modified) (1 diff)
• libemu/trunk/src/emu_cpu.c (modified) (1 diff)

libemu/trunk/include/emu/emu_cpu.h

@@ -59 +59 @@
-void emu_cpu_debug_print(struct emu_cpu *c);
-
+
+inline void result8_flags_update(struct emu_cpu *c, uint8_t result);
+inline void result16_flags_update(struct emu_cpu *c, uint16_t result);
+inline void result32_flags_update(struct emu_cpu *c, uint32_t result);
+
+
-#endif /* HAVEEMU_CPU_H */

libemu/trunk/src/emu_cpu.c

@@ -215 +215 @@
-{
-        return c->eflags;
+}
+
+inline void result8_flags_update(struct emu_cpu *c, uint8_t result)
+{
+        int i;
+        int num_bits=0;
+        for ( i=0;i<sizeof(result);i++ )
+                if (result & (1 << i) )
+                        num_bits++;
+
+        if (num_bits == 0)
+                CPU_FLAG_SET(c,f_zf);
+
+        if ((num_bits %2) == 0)
+                CPU_FLAG_SET(c,f_pf);
+
+        if (result & (1 << (sizeof(result) - 1)))
+                CPU_FLAG_SET(c,f_sf);
+}
+
+inline void result16_flags_update(struct emu_cpu *c, uint16_t result)
+{
+        int i;
+        int num_bits=0;
+        for ( i=0;i<sizeof(result);i++ )
+                if (result & (1 << i) )
+                        num_bits++;
+
+        if (num_bits == 0)
+                CPU_FLAG_SET(c,f_zf);
+
+        if ((num_bits %2) == 0)
+                CPU_FLAG_SET(c,f_pf);
+
+        if (result & (1 << (sizeof(result) - 1)))
+                CPU_FLAG_SET(c,f_sf);}
+
+inline void result32_flags_update(struct emu_cpu *c, uint32_t result)
+{
+        int i;
+        int num_bits=0;
+        for ( i=0;i<sizeof(result);i++ )
+                if (result & (1 << i) )
+                        num_bits++;
+
+        if (num_bits == 0)
+                CPU_FLAG_SET(c,f_zf);
+
+        if ((num_bits %2) == 0)
+                CPU_FLAG_SET(c,f_pf);
+
+        if (result & (1 << (sizeof(result) - 1)))
+                CPU_FLAG_SET(c,f_sf);
-}
-