move is_register helper to nasm.h

 H. Peter Anvin noted:
 |
 | Could we avoid putting static code that has no dynamic content in
 | dynamically generated files... it just complicates things unnecessarily.
 |
 | The above can move into nasm.h for example.
 |

Good idea.

CC: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/nasm.h b/nasm.h
index 7ff19027..cbd9462f 100644
--- a/nasm.h
+++ b/nasm.h
@@ -421,6 +421,12 @@ enum {
 /* Register names automatically generated from regs.dat */
 #include "regs.h"
 
+/* verify value to be register */
+static inline int is_register(int reg)
+{
+    return reg >= EXPR_REG_START && reg < REG_ENUM_LIMIT;
+}
+
 enum ccode {			/* condition code names */
     C_A, C_AE, C_B, C_BE, C_C, C_E, C_G, C_GE, C_L, C_LE, C_NA, C_NAE,
     C_NB, C_NBE, C_NC, C_NE, C_NG, C_NGE, C_NL, C_NLE, C_NO, C_NP,