/* SPDX-License-Identifier: GPL-2.0 */ /*---------------------------------------------------------------------------+ | status_w.h | | | | Copyright (C) 1992,1993 | | W. Metzenthen, 22 Parker St, Ormond, Vic 3163, | | Australia. E-mail billm@vaxc.cc.monash.edu.au | | | +---------------------------------------------------------------------------*/ #ifndef _STATUS_H_ #define _STATUS_H_ #include "fpu_emu.h" /* for definition of PECULIAR_486 */ #ifdef __ASSEMBLY__ #define Const__(x) $##x #else #define Const__(x) x #endif #define SW_Backward Const__(0x8000) /* backward compatibility */ #define SW_C3 Const__(0x4000) /* condition bit 3 */ #define SW_Top Const__(0x3800) /* top of stack */ #define SW_Top_Shift Const__(11) /* shift for top of stack bits */ #define SW_C2 Const__(0x0400) /* condition bit 2 */ #define SW_C1 Const__(0x0200) /* condition bit 1 */ #define SW_C0 Const__(0x0100) /* condition bit 0 */ #define SW_Summary Const__(0x0080) /* exception summary */ #define SW_Stack_Fault Const__(0x0040) /* stack fault */ #define SW_Precision Const__(0x0020) /* loss of precision */ #define SW_Underflow Const__(0x0010) /* underflow */ #define SW_Overflow Const__(0x0008) /* overflow */ #define SW_Zero_Div Const__(0x0004) /* divide by zero */ #define SW_Denorm_Op Const__(0x0002) /* denormalized operand */ #define SW_Invalid Const__(0x0001) /* invalid operation */ #define SW_Exc_Mask Const__(0x27f) /* Status word exception bit mask */ #ifndef __ASSEMBLY__ #define COMP_A_gt_B 1 #define COMP_A_eq_B 2 #define COMP_A_lt_B 3 #define COMP_No_Comp 4 #define COMP_Denormal 0x20 #define COMP_NaN 0x40 #define COMP_SNaN 0x80 #define status_word() \ ((partial_status & ~SW_Top & 0xffff) | ((top << SW_Top_Shift) & SW_Top)) static inline void setcc(int cc) { partial_status &= ~(SW_C0 | SW_C1 | SW_C2 | SW_C3); partial_status |= (cc) & (SW_C0 | SW_C1 | SW_C2 | SW_C3); } #ifdef PECULIAR_486 /* Default, this conveys no information, but an 80486 does it. */ /* Clear the SW_C1 bit, "other bits undefined". */ # define clear_C1() { partial_status &= ~SW_C1; } # else # define clear_C1() #endif /* PECULIAR_486 */ #endif /* __ASSEMBLY__ */ #endif /* _STATUS_H_ */