From 4ae1168199021dacedacd32274eef402c5059841 Mon Sep 17 00:00:00 2001 From: Ivo van Doorn Date: Fri, 6 Jun 2008 22:58:29 +0200 Subject: rt2x00: Use __builtin_choose_expr() instead of ?: To really force the FIELD macros to determine the first bit of the register field we should use the __builtin_choose_expr() function. Signed-off-by: Ivo van Doorn Signed-off-by: John W. Linville --- drivers/net/wireless/rt2x00/rt2x00reg.h | 22 +++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-) diff --git a/drivers/net/wireless/rt2x00/rt2x00reg.h b/drivers/net/wireless/rt2x00/rt2x00reg.h index c3f1202404d..7e88ce5651b 100644 --- a/drivers/net/wireless/rt2x00/rt2x00reg.h +++ b/drivers/net/wireless/rt2x00/rt2x00reg.h @@ -145,23 +145,27 @@ struct rt2x00_field32 { * compile-time rather then run-time. */ #define compile_ffs2(__x) \ - ( ((__x) & 0x1) ? 0 : 1 ) + __builtin_choose_expr(((__x) & 0x1), 0, 1) #define compile_ffs4(__x) \ - ( ((__x) & 0x3) ? \ - compile_ffs2(__x) : (compile_ffs2((__x) >> 2) + 2) ) + __builtin_choose_expr(((__x) & 0x3), \ + (compile_ffs2((__x))), \ + (compile_ffs2((__x) >> 2) + 2)) #define compile_ffs8(__x) \ - ( ((__x) & 0xf) ? \ - compile_ffs4(__x) : (compile_ffs4((__x) >> 4) + 4) ) + __builtin_choose_expr(((__x) & 0xf), \ + (compile_ffs4((__x))), \ + (compile_ffs4((__x) >> 4) + 4)) #define compile_ffs16(__x) \ - ( ((__x) & 0xff) ? \ - compile_ffs8(__x) : (compile_ffs8((__x) >> 8) + 8) ) + __builtin_choose_expr(((__x) & 0xff), \ + (compile_ffs8((__x))), \ + (compile_ffs8((__x) >> 8) + 8)) #define compile_ffs32(__x) \ - ( ((__x) & 0xffff) ? \ - compile_ffs16(__x) : (compile_ffs16((__x) >> 16) + 16) ) + __builtin_choose_expr(((__x) & 0xffff), \ + (compile_ffs16((__x))), \ + (compile_ffs16((__x) >> 16) + 16)) /* * This macro will check the requirements for the FIELD{8,16,32} macros -- cgit v1.2.3