Changeset 101141 in vbox

Timestamp:

Sep 18, 2023 11:09:27 AM (16 months ago)

Author:

vboxsync

Message:

iprt/x86.h: Added X86_MOD_MEM[014] and X86_MOD_REG for use with X86_MODRM_MAKE. bugref:10370

File:

• trunk/include/iprt/x86.h (modified) (2 diffs)

trunk/include/iprt/x86.h

@@ -4876 +4876 @@
 #define X86_MODRM_MOD_SMASK     UINT8_C(0x03)
 #define X86_MODRM_MOD_SHIFT     6
+
+#define X86_MOD_MEM0            0   /**< Indirect addressing without displacement (except RM=4 (SIB) and RM=5 (disp32)). */
+#define X86_MOD_MEM1            1   /**< Indirect addressing with 8-bit displacement. */
+#define X86_MOD_MEM4            2   /**< Indirect addressing with 32-bit displacement. */
+#define X86_MOD_REG             3   /**< Registers. */
+
 #ifndef VBOX_FOR_DTRACE_LIB
 AssertCompile((X86_MODRM_RM_MASK | X86_MODRM_REG_MASK | X86_MODRM_MOD_MASK) == 0xff);
@@ -4881 +4887 @@
 AssertCompile((X86_MODRM_MOD_MASK >> X86_MODRM_MOD_SHIFT) == X86_MODRM_MOD_SMASK);
 /** @def X86_MODRM_MAKE
- * @param   a_Mod       The mod value (0..3).
+ * @param   a_Mod       The mod value (0..3) - X86_MOD_XXX.
  * @param   a_Reg       The register value (0..7).
  * @param   a_RegMem    The register or memory value (0..7). */
 # define X86_MODRM_MAKE(a_Mod, a_Reg, a_RegMem) (((a_Mod) << X86_MODRM_MOD_SHIFT) | ((a_Reg) << X86_MODRM_REG_SHIFT) | (a_RegMem))
 #endif
+
 /** @} */