1 /* $NetBSD: msg_309.c,v 1.4 2021/05/16 10:18:25 rillig Exp $ */ 2 # 3 "msg_309.c" 3 4 // Test for message: extra bits set to 0 in conversion of '%s' to '%s', op '%s' [309] 5 6 int 7 scale(unsigned long long x) { 8 9 /* 10 * Both operands of '&' have the same type, therefore no conversion 11 * is necessary and no bits can get lost. 12 */ 13 if ((x & 0xffffffff00000000ULL) != 0) 14 return 32; 15 16 /* 17 * The constant has type 'unsigned 32-bit'. The usual arithmetic 18 * conversions of '&' convert this constant to unsigned 64-bit. 19 * The programmer may or may not have intended to sign-extend the 20 * bit mask here. This situation may occur during migration from a 21 * 32-bit to a 64-bit platform. 22 */ 23 if ((x & 0xffff0000) != 0) /* expect: 309 */ 24 return 16; 25 26 /* 27 * In the remaining cases, the constant does not have its most 28 * significant bit set, therefore there is no ambiguity. 29 */ 30 if ((x & 0xff00) != 0) 31 return 8; 32 if ((x & 0xf0) != 0) 33 return 4; 34 if ((x & 0xc) != 0) 35 return 2; 36 if ((x & 0x2) != 0) 37 return 1; 38 return (int)(x & 0x1); 39 } 40