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How cpp deal with #abi(n32) ?
- From: "Pan ruochen" <panruochen at gmail dot com>
- To: gcc-help at gcc dot gnu dot org
- Date: Mon, 17 Nov 2008 17:15:32 +0800
- Subject: How cpp deal with #abi(n32) ?
Hi All,
There is a header file in my project:
/*regdef.h : MIPS Rx000 symbolic register names for assembler*/
#define zero $0
#define AT $1
#define v0 $2
#define v1 $3
#define a0 $4
#define a1 $5
#define a2 $6
#define a3 $7
#if #abi(n32) || #abi(n64) || #abi(64) || #abi(eabi)
#define a4 $8
#define a5 $9
#define a6 $10
#define a7 $11
#define t0 $12
#define t1 $13
#define t2 $14
#define t3 $15
#define ta0 $8 /* alias for $a4 */
#define ta1 $9 /* alias for $a5 */
#define ta2 $10 /* alias for $a6 */
#define ta3 $11 /* alias for $a7 */
#else
#define t0 $8
#define t1 $9
#define t2 $10
#define t3 $11
#define t4 $12
#define t5 $13
#define t6 $14
#define t7 $15
#define ta0 $12 /* alias for $t4 */
#define ta1 $13 /* alias for $t5 */
#define ta2 $14 /* alias for $t6 */
#define ta3 $15 /* alias for $t7 */
#endif
#define s0 $16
#define s1 $17
#define s2 $18
#define s3 $19
#define s4 $20
#define s5 $21
#define s6 $22
#define s7 $23
#define s8 $30 /* == fp */
#define t8 $24
#define t9 $25
#define k0 $26
#define k1 $27
#define gp $28
#define sp $29
#define fp $30
#define ra $31
I can't find any explaination for the syntax '#abi(n32)' in gcc
manual. But gcc can still process this header file and takes the #else
branch during compilation.
So, how gcc deal with this header file?
Best Regards,
PRC
Nov 17, 2008