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usr
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linux-headers-6.8.0-36
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arch
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m68k
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include
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asm
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math-emu.h
/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_M68K_SETUP_H #define _ASM_M68K_SETUP_H #include <asm/setup.h> #include <linux/linkage.h> /* Status Register bits */ /* accrued exception bits */ #define FPSR_AEXC_INEX 3 #define FPSR_AEXC_DZ 4 #define FPSR_AEXC_UNFL 5 #define FPSR_AEXC_OVFL 6 #define FPSR_AEXC_IOP 7 /* exception status bits */ #define FPSR_EXC_INEX1 8 #define FPSR_EXC_INEX2 9 #define FPSR_EXC_DZ 10 #define FPSR_EXC_UNFL 11 #define FPSR_EXC_OVFL 12 #define FPSR_EXC_OPERR 13 #define FPSR_EXC_SNAN 14 #define FPSR_EXC_BSUN 15 /* quotient byte, assumes big-endian, of course */ #define FPSR_QUOTIENT(fpsr) (*((signed char *) &(fpsr) + 1)) /* condition code bits */ #define FPSR_CC_NAN 24 #define FPSR_CC_INF 25 #define FPSR_CC_Z 26 #define FPSR_CC_NEG 27 /* Control register bits */ /* rounding mode */ #define FPCR_ROUND_RN 0 /* round to nearest/even */ #define FPCR_ROUND_RZ 1 /* round to zero */ #define FPCR_ROUND_RM 2 /* minus infinity */ #define FPCR_ROUND_RP 3 /* plus infinity */ /* rounding precision */ #define FPCR_PRECISION_X 0 /* long double */ #define FPCR_PRECISION_S 1 /* double */ #define FPCR_PRECISION_D 2 /* float */ /* Flags to select the debugging output */ #define PDECODE 0 #define PEXECUTE 1 #define PCONV 2 #define PNORM 3 #define PREGISTER 4 #define PINSTR 5 #define PUNIMPL 6 #define PMOVEM 7 #define PMDECODE (1<<PDECODE) #define PMEXECUTE (1<<PEXECUTE) #define PMCONV (1<<PCONV) #define PMNORM (1<<PNORM) #define PMREGISTER (1<<PREGISTER) #define PMINSTR (1<<PINSTR) #define PMUNIMPL (1<<PUNIMPL) #define PMMOVEM (1<<PMOVEM) #ifndef __ASSEMBLY__ #include <linux/kernel.h> #include <linux/sched.h> union fp_mant64 { unsigned long long m64; unsigned long m32[2]; }; union fp_mant128 { unsigned long long m64[2]; unsigned long m32[4]; }; /* internal representation of extended fp numbers */ struct fp_ext { unsigned char lowmant; unsigned char sign; unsigned short exp; union fp_mant64 mant; }; /* C representation of FPU registers */ /* NOTE: if you change this, you have to change the assembler offsets below and the size in <asm/fpu.h>, too */ struct fp_data { struct fp_ext fpreg[8]; unsigned int fpcr; unsigned int fpsr; unsigned int fpiar; unsigned short prec; unsigned short rnd; struct fp_ext temp[2]; }; #ifdef FPU_EMU_DEBUG extern unsigned int fp_debugprint; #define dprint(bit, fmt, ...) ({ \ if (fp_debugprint & (1 << (bit))) \ pr_info(fmt, ##__VA_ARGS__); \ }) #else #define dprint(bit, fmt, ...) no_printk(fmt, ##__VA_ARGS__) #endif #define uprint(str) ({ \ static int __count = 3; \ \ if (__count > 0) { \ pr_err("You just hit an unimplemented " \ "fpu instruction (%s)\n", str); \ pr_err("Please report this to ....\n"); \ __count--; \ } \ }) #define FPDATA ((struct fp_data *)current->thread.fp) #else /* __ASSEMBLY__ */ #define FPDATA %a2 /* offsets from the base register to the floating point data in the task struct */ #define FPD_FPREG (TASK_THREAD+THREAD_FPREG+0) #define FPD_FPCR (TASK_THREAD+THREAD_FPREG+96) #define FPD_FPSR (TASK_THREAD+THREAD_FPREG+100) #define FPD_FPIAR (TASK_THREAD+THREAD_FPREG+104) #define FPD_PREC (TASK_THREAD+THREAD_FPREG+108) #define FPD_RND (TASK_THREAD+THREAD_FPREG+110) #define FPD_TEMPFP1 (TASK_THREAD+THREAD_FPREG+112) #define FPD_TEMPFP2 (TASK_THREAD+THREAD_FPREG+124) #define FPD_SIZEOF (TASK_THREAD+THREAD_FPREG+136) /* offsets on the stack to access saved registers, * these are only used during instruction decoding * where we always know how deep we're on the stack. */ #define FPS_DO (PT_OFF_D0) #define FPS_D1 (PT_OFF_D1) #define FPS_D2 (PT_OFF_D2) #define FPS_A0 (PT_OFF_A0) #define FPS_A1 (PT_OFF_A1) #define FPS_A2 (PT_OFF_A2) #define FPS_SR (PT_OFF_SR) #define FPS_PC (PT_OFF_PC) #define FPS_EA (PT_OFF_PC+6) #define FPS_PC2 (PT_OFF_PC+10) .macro fp_get_fp_reg lea (FPD_FPREG,FPDATA,%d0.w*4),%a0 lea (%a0,%d0.w*8),%a0 .endm /* Macros used to get/put the current program counter. * 020/030 use a different stack frame then 040/060, for the * 040/060 the return pc points already to the next location, * so this only needs to be modified for jump instructions. */ .macro fp_get_pc dest move.l (FPS_PC+4,%sp),\dest .endm .macro fp_put_pc src,jump=0 move.l \src,(FPS_PC+4,%sp) .endm .macro fp_get_instr_data f,s,dest,label getuser \f,%sp@(FPS_PC+4)@(0),\dest,\label,%sp@(FPS_PC+4) addq.l #\s,%sp@(FPS_PC+4) .endm .macro fp_get_instr_word dest,label,addr fp_get_instr_data w,2,\dest,\label,\addr .endm .macro fp_get_instr_long dest,label,addr fp_get_instr_data l,4,\dest,\label,\addr .endm /* These macros are used to read from/write to user space * on error we jump to the fixup section, load the fault * address into %a0 and jump to the exit. * (derived from <asm/uaccess.h>) */ .macro getuser size,src,dest,label,addr | printf ,"[\size<%08x]",1,\addr .Lu1\@: moves\size \src,\dest .section .fixup,"ax" .even .Lu2\@: move.l \addr,%a0 jra \label .previous .section __ex_table,"a" .align 4 .long .Lu1\@,.Lu2\@ .previous .endm .macro putuser size,src,dest,label,addr | printf ,"[\size>%08x]",1,\addr .Lu1\@: moves\size \src,\dest .Lu2\@: .section .fixup,"ax" .even .Lu3\@: move.l \addr,%a0 jra \label .previous .section __ex_table,"a" .align 4 .long .Lu1\@,.Lu3\@ .long .Lu2\@,.Lu3\@ .previous .endm /* work around binutils idiocy */ old_gas=-1 .irp gas_ident.x .x old_gas=old_gas+1 .endr .if !old_gas .irp m b,w,l .macro getuser.\m src,dest,label,addr getuser .\m,\src,\dest,\label,\addr .endm .macro putuser.\m src,dest,label,addr putuser .\m,\src,\dest,\label,\addr .endm .endr .endif .macro movestack nr,arg1,arg2,arg3,arg4,arg5 .if \nr movestack (\nr-1),\arg2,\arg3,\arg4,\arg5 move.l \arg1,-(%sp) .endif .endm .macro printf bit=-1,string,nr=0,arg1,arg2,arg3,arg4,arg5 #ifdef FPU_EMU_DEBUG .data .Lpdata\@: .string "\string" .previous movem.l %d0/%d1/%a0/%a1,-(%sp) .if \bit+1 #if 0 moveq #\bit,%d0 andw #7,%d0 btst %d0,fp_debugprint+((31-\bit)/8) #else btst #\bit,fp_debugprint+((31-\bit)/8) #endif jeq .Lpskip\@ .endif movestack \nr,\arg1,\arg2,\arg3,\arg4,\arg5 pea .Lpdata\@ jsr printk lea ((\nr+1)*4,%sp),%sp .Lpskip\@: movem.l (%sp)+,%d0/%d1/%a0/%a1 #endif .endm .macro printx bit,fp #ifdef FPU_EMU_DEBUG movem.l %d0/%a0,-(%sp) lea \fp,%a0 #if 0 moveq #'+',%d0 tst.w (%a0) jeq .Lx1\@ moveq #'-',%d0 .Lx1\@: printf \bit," %c",1,%d0 move.l (4,%a0),%d0 bclr #31,%d0 jne .Lx2\@ printf \bit,"0." jra .Lx3\@ .Lx2\@: printf \bit,"1." .Lx3\@: printf \bit,"%08x%08x",2,%d0,%a0@(8) move.w (2,%a0),%d0 ext.l %d0 printf \bit,"E%04x",1,%d0 #else printf \bit," %08x%08x%08x",3,%a0@,%a0@(4),%a0@(8) #endif movem.l (%sp)+,%d0/%a0 #endif .endm .macro debug instr,args #ifdef FPU_EMU_DEBUG \instr \args #endif .endm #endif /* __ASSEMBLY__ */ #endif /* _ASM_M68K_SETUP_H */
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