summaryrefslogtreecommitdiffstats
path: root/arch/x86/math-emu/load_store.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/math-emu/load_store.c')
-rw-r--r--arch/x86/math-emu/load_store.c448
1 files changed, 229 insertions, 219 deletions
diff --git a/arch/x86/math-emu/load_store.c b/arch/x86/math-emu/load_store.c
index eebd6fb1c8a8..2931ff355218 100644
--- a/arch/x86/math-emu/load_store.c
+++ b/arch/x86/math-emu/load_store.c
@@ -26,247 +26,257 @@
#include "status_w.h"
#include "control_w.h"
-
-#define _NONE_ 0 /* st0_ptr etc not needed */
-#define _REG0_ 1 /* Will be storing st(0) */
-#define _PUSH_ 3 /* Need to check for space to push onto stack */
-#define _null_ 4 /* Function illegal or not implemented */
+#define _NONE_ 0 /* st0_ptr etc not needed */
+#define _REG0_ 1 /* Will be storing st(0) */
+#define _PUSH_ 3 /* Need to check for space to push onto stack */
+#define _null_ 4 /* Function illegal or not implemented */
#define pop_0() { FPU_settag0(TAG_Empty); top++; }
-
static u_char const type_table[32] = {
- _PUSH_, _PUSH_, _PUSH_, _PUSH_,
- _null_, _null_, _null_, _null_,
- _REG0_, _REG0_, _REG0_, _REG0_,
- _REG0_, _REG0_, _REG0_, _REG0_,
- _NONE_, _null_, _NONE_, _PUSH_,
- _NONE_, _PUSH_, _null_, _PUSH_,
- _NONE_, _null_, _NONE_, _REG0_,
- _NONE_, _REG0_, _NONE_, _REG0_
- };
+ _PUSH_, _PUSH_, _PUSH_, _PUSH_,
+ _null_, _null_, _null_, _null_,
+ _REG0_, _REG0_, _REG0_, _REG0_,
+ _REG0_, _REG0_, _REG0_, _REG0_,
+ _NONE_, _null_, _NONE_, _PUSH_,
+ _NONE_, _PUSH_, _null_, _PUSH_,
+ _NONE_, _null_, _NONE_, _REG0_,
+ _NONE_, _REG0_, _NONE_, _REG0_
+};
u_char const data_sizes_16[32] = {
- 4, 4, 8, 2, 0, 0, 0, 0,
- 4, 4, 8, 2, 4, 4, 8, 2,
- 14, 0, 94, 10, 2, 10, 0, 8,
- 14, 0, 94, 10, 2, 10, 2, 8
+ 4, 4, 8, 2, 0, 0, 0, 0,
+ 4, 4, 8, 2, 4, 4, 8, 2,
+ 14, 0, 94, 10, 2, 10, 0, 8,
+ 14, 0, 94, 10, 2, 10, 2, 8
};
static u_char const data_sizes_32[32] = {
- 4, 4, 8, 2, 0, 0, 0, 0,
- 4, 4, 8, 2, 4, 4, 8, 2,
- 28, 0,108, 10, 2, 10, 0, 8,
- 28, 0,108, 10, 2, 10, 2, 8
+ 4, 4, 8, 2, 0, 0, 0, 0,
+ 4, 4, 8, 2, 4, 4, 8, 2,
+ 28, 0, 108, 10, 2, 10, 0, 8,
+ 28, 0, 108, 10, 2, 10, 2, 8
};
int FPU_load_store(u_char type, fpu_addr_modes addr_modes,
- void __user *data_address)
+ void __user * data_address)
{
- FPU_REG loaded_data;
- FPU_REG *st0_ptr;
- u_char st0_tag = TAG_Empty; /* This is just to stop a gcc warning. */
- u_char loaded_tag;
+ FPU_REG loaded_data;
+ FPU_REG *st0_ptr;
+ u_char st0_tag = TAG_Empty; /* This is just to stop a gcc warning. */
+ u_char loaded_tag;
- st0_ptr = NULL; /* Initialized just to stop compiler warnings. */
+ st0_ptr = NULL; /* Initialized just to stop compiler warnings. */
- if ( addr_modes.default_mode & PROTECTED )
- {
- if ( addr_modes.default_mode == SEG32 )
- {
- if ( access_limit < data_sizes_32[type] )
- math_abort(FPU_info,SIGSEGV);
- }
- else if ( addr_modes.default_mode == PM16 )
- {
- if ( access_limit < data_sizes_16[type] )
- math_abort(FPU_info,SIGSEGV);
- }
+ if (addr_modes.default_mode & PROTECTED) {
+ if (addr_modes.default_mode == SEG32) {
+ if (access_limit < data_sizes_32[type])
+ math_abort(FPU_info, SIGSEGV);
+ } else if (addr_modes.default_mode == PM16) {
+ if (access_limit < data_sizes_16[type])
+ math_abort(FPU_info, SIGSEGV);
+ }
#ifdef PARANOID
- else
- EXCEPTION(EX_INTERNAL|0x140);
+ else
+ EXCEPTION(EX_INTERNAL | 0x140);
#endif /* PARANOID */
- }
+ }
- switch ( type_table[type] )
- {
- case _NONE_:
- break;
- case _REG0_:
- st0_ptr = &st(0); /* Some of these instructions pop after
- storing */
- st0_tag = FPU_gettag0();
- break;
- case _PUSH_:
- {
- if ( FPU_gettagi(-1) != TAG_Empty )
- { FPU_stack_overflow(); return 0; }
- top--;
- st0_ptr = &st(0);
- }
- break;
- case _null_:
- FPU_illegal();
- return 0;
+ switch (type_table[type]) {
+ case _NONE_:
+ break;
+ case _REG0_:
+ st0_ptr = &st(0); /* Some of these instructions pop after
+ storing */
+ st0_tag = FPU_gettag0();
+ break;
+ case _PUSH_:
+ {
+ if (FPU_gettagi(-1) != TAG_Empty) {
+ FPU_stack_overflow();
+ return 0;
+ }
+ top--;
+ st0_ptr = &st(0);
+ }
+ break;
+ case _null_:
+ FPU_illegal();
+ return 0;
#ifdef PARANOID
- default:
- EXCEPTION(EX_INTERNAL|0x141);
- return 0;
+ default:
+ EXCEPTION(EX_INTERNAL | 0x141);
+ return 0;
#endif /* PARANOID */
- }
-
- switch ( type )
- {
- case 000: /* fld m32real */
- clear_C1();
- loaded_tag = FPU_load_single((float __user *)data_address, &loaded_data);
- if ( (loaded_tag == TAG_Special)
- && isNaN(&loaded_data)
- && (real_1op_NaN(&loaded_data) < 0) )
- {
- top++;
- break;
- }
- FPU_copy_to_reg0(&loaded_data, loaded_tag);
- break;
- case 001: /* fild m32int */
- clear_C1();
- loaded_tag = FPU_load_int32((long __user *)data_address, &loaded_data);
- FPU_copy_to_reg0(&loaded_data, loaded_tag);
- break;
- case 002: /* fld m64real */
- clear_C1();
- loaded_tag = FPU_load_double((double __user *)data_address, &loaded_data);
- if ( (loaded_tag == TAG_Special)
- && isNaN(&loaded_data)
- && (real_1op_NaN(&loaded_data) < 0) )
- {
- top++;
- break;
}
- FPU_copy_to_reg0(&loaded_data, loaded_tag);
- break;
- case 003: /* fild m16int */
- clear_C1();
- loaded_tag = FPU_load_int16((short __user *)data_address, &loaded_data);
- FPU_copy_to_reg0(&loaded_data, loaded_tag);
- break;
- case 010: /* fst m32real */
- clear_C1();
- FPU_store_single(st0_ptr, st0_tag, (float __user *)data_address);
- break;
- case 011: /* fist m32int */
- clear_C1();
- FPU_store_int32(st0_ptr, st0_tag, (long __user *)data_address);
- break;
- case 012: /* fst m64real */
- clear_C1();
- FPU_store_double(st0_ptr, st0_tag, (double __user *)data_address);
- break;
- case 013: /* fist m16int */
- clear_C1();
- FPU_store_int16(st0_ptr, st0_tag, (short __user *)data_address);
- break;
- case 014: /* fstp m32real */
- clear_C1();
- if ( FPU_store_single(st0_ptr, st0_tag, (float __user *)data_address) )
- pop_0(); /* pop only if the number was actually stored
- (see the 80486 manual p16-28) */
- break;
- case 015: /* fistp m32int */
- clear_C1();
- if ( FPU_store_int32(st0_ptr, st0_tag, (long __user *)data_address) )
- pop_0(); /* pop only if the number was actually stored
- (see the 80486 manual p16-28) */
- break;
- case 016: /* fstp m64real */
- clear_C1();
- if ( FPU_store_double(st0_ptr, st0_tag, (double __user *)data_address) )
- pop_0(); /* pop only if the number was actually stored
- (see the 80486 manual p16-28) */
- break;
- case 017: /* fistp m16int */
- clear_C1();
- if ( FPU_store_int16(st0_ptr, st0_tag, (short __user *)data_address) )
- pop_0(); /* pop only if the number was actually stored
- (see the 80486 manual p16-28) */
- break;
- case 020: /* fldenv m14/28byte */
- fldenv(addr_modes, (u_char __user *)data_address);
- /* Ensure that the values just loaded are not changed by
- fix-up operations. */
- return 1;
- case 022: /* frstor m94/108byte */
- frstor(addr_modes, (u_char __user *)data_address);
- /* Ensure that the values just loaded are not changed by
- fix-up operations. */
- return 1;
- case 023: /* fbld m80dec */
- clear_C1();
- loaded_tag = FPU_load_bcd((u_char __user *)data_address);
- FPU_settag0(loaded_tag);
- break;
- case 024: /* fldcw */
- RE_ENTRANT_CHECK_OFF;
- FPU_access_ok(VERIFY_READ, data_address, 2);
- FPU_get_user(control_word, (unsigned short __user *) data_address);
- RE_ENTRANT_CHECK_ON;
- if ( partial_status & ~control_word & CW_Exceptions )
- partial_status |= (SW_Summary | SW_Backward);
- else
- partial_status &= ~(SW_Summary | SW_Backward);
+
+ switch (type) {
+ case 000: /* fld m32real */
+ clear_C1();
+ loaded_tag =
+ FPU_load_single((float __user *)data_address, &loaded_data);
+ if ((loaded_tag == TAG_Special)
+ && isNaN(&loaded_data)
+ && (real_1op_NaN(&loaded_data) < 0)) {
+ top++;
+ break;
+ }
+ FPU_copy_to_reg0(&loaded_data, loaded_tag);
+ break;
+ case 001: /* fild m32int */
+ clear_C1();
+ loaded_tag =
+ FPU_load_int32((long __user *)data_address, &loaded_data);
+ FPU_copy_to_reg0(&loaded_data, loaded_tag);
+ break;
+ case 002: /* fld m64real */
+ clear_C1();
+ loaded_tag =
+ FPU_load_double((double __user *)data_address,
+ &loaded_data);
+ if ((loaded_tag == TAG_Special)
+ && isNaN(&loaded_data)
+ && (real_1op_NaN(&loaded_data) < 0)) {
+ top++;
+ break;
+ }
+ FPU_copy_to_reg0(&loaded_data, loaded_tag);
+ break;
+ case 003: /* fild m16int */
+ clear_C1();
+ loaded_tag =
+ FPU_load_int16((short __user *)data_address, &loaded_data);
+ FPU_copy_to_reg0(&loaded_data, loaded_tag);
+ break;
+ case 010: /* fst m32real */
+ clear_C1();
+ FPU_store_single(st0_ptr, st0_tag,
+ (float __user *)data_address);
+ break;
+ case 011: /* fist m32int */
+ clear_C1();
+ FPU_store_int32(st0_ptr, st0_tag, (long __user *)data_address);
+ break;
+ case 012: /* fst m64real */
+ clear_C1();
+ FPU_store_double(st0_ptr, st0_tag,
+ (double __user *)data_address);
+ break;
+ case 013: /* fist m16int */
+ clear_C1();
+ FPU_store_int16(st0_ptr, st0_tag, (short __user *)data_address);
+ break;
+ case 014: /* fstp m32real */
+ clear_C1();
+ if (FPU_store_single
+ (st0_ptr, st0_tag, (float __user *)data_address))
+ pop_0(); /* pop only if the number was actually stored
+ (see the 80486 manual p16-28) */
+ break;
+ case 015: /* fistp m32int */
+ clear_C1();
+ if (FPU_store_int32
+ (st0_ptr, st0_tag, (long __user *)data_address))
+ pop_0(); /* pop only if the number was actually stored
+ (see the 80486 manual p16-28) */
+ break;
+ case 016: /* fstp m64real */
+ clear_C1();
+ if (FPU_store_double
+ (st0_ptr, st0_tag, (double __user *)data_address))
+ pop_0(); /* pop only if the number was actually stored
+ (see the 80486 manual p16-28) */
+ break;
+ case 017: /* fistp m16int */
+ clear_C1();
+ if (FPU_store_int16
+ (st0_ptr, st0_tag, (short __user *)data_address))
+ pop_0(); /* pop only if the number was actually stored
+ (see the 80486 manual p16-28) */
+ break;
+ case 020: /* fldenv m14/28byte */
+ fldenv(addr_modes, (u_char __user *) data_address);
+ /* Ensure that the values just loaded are not changed by
+ fix-up operations. */
+ return 1;
+ case 022: /* frstor m94/108byte */
+ frstor(addr_modes, (u_char __user *) data_address);
+ /* Ensure that the values just loaded are not changed by
+ fix-up operations. */
+ return 1;
+ case 023: /* fbld m80dec */
+ clear_C1();
+ loaded_tag = FPU_load_bcd((u_char __user *) data_address);
+ FPU_settag0(loaded_tag);
+ break;
+ case 024: /* fldcw */
+ RE_ENTRANT_CHECK_OFF;
+ FPU_access_ok(VERIFY_READ, data_address, 2);
+ FPU_get_user(control_word,
+ (unsigned short __user *)data_address);
+ RE_ENTRANT_CHECK_ON;
+ if (partial_status & ~control_word & CW_Exceptions)
+ partial_status |= (SW_Summary | SW_Backward);
+ else
+ partial_status &= ~(SW_Summary | SW_Backward);
#ifdef PECULIAR_486
- control_word |= 0x40; /* An 80486 appears to always set this bit */
+ control_word |= 0x40; /* An 80486 appears to always set this bit */
#endif /* PECULIAR_486 */
- return 1;
- case 025: /* fld m80real */
- clear_C1();
- loaded_tag = FPU_load_extended((long double __user *)data_address, 0);
- FPU_settag0(loaded_tag);
- break;
- case 027: /* fild m64int */
- clear_C1();
- loaded_tag = FPU_load_int64((long long __user *)data_address);
- if (loaded_tag == TAG_Error)
+ return 1;
+ case 025: /* fld m80real */
+ clear_C1();
+ loaded_tag =
+ FPU_load_extended((long double __user *)data_address, 0);
+ FPU_settag0(loaded_tag);
+ break;
+ case 027: /* fild m64int */
+ clear_C1();
+ loaded_tag = FPU_load_int64((long long __user *)data_address);
+ if (loaded_tag == TAG_Error)
+ return 0;
+ FPU_settag0(loaded_tag);
+ break;
+ case 030: /* fstenv m14/28byte */
+ fstenv(addr_modes, (u_char __user *) data_address);
+ return 1;
+ case 032: /* fsave */
+ fsave(addr_modes, (u_char __user *) data_address);
+ return 1;
+ case 033: /* fbstp m80dec */
+ clear_C1();
+ if (FPU_store_bcd
+ (st0_ptr, st0_tag, (u_char __user *) data_address))
+ pop_0(); /* pop only if the number was actually stored
+ (see the 80486 manual p16-28) */
+ break;
+ case 034: /* fstcw m16int */
+ RE_ENTRANT_CHECK_OFF;
+ FPU_access_ok(VERIFY_WRITE, data_address, 2);
+ FPU_put_user(control_word,
+ (unsigned short __user *)data_address);
+ RE_ENTRANT_CHECK_ON;
+ return 1;
+ case 035: /* fstp m80real */
+ clear_C1();
+ if (FPU_store_extended
+ (st0_ptr, st0_tag, (long double __user *)data_address))
+ pop_0(); /* pop only if the number was actually stored
+ (see the 80486 manual p16-28) */
+ break;
+ case 036: /* fstsw m2byte */
+ RE_ENTRANT_CHECK_OFF;
+ FPU_access_ok(VERIFY_WRITE, data_address, 2);
+ FPU_put_user(status_word(),
+ (unsigned short __user *)data_address);
+ RE_ENTRANT_CHECK_ON;
+ return 1;
+ case 037: /* fistp m64int */
+ clear_C1();
+ if (FPU_store_int64
+ (st0_ptr, st0_tag, (long long __user *)data_address))
+ pop_0(); /* pop only if the number was actually stored
+ (see the 80486 manual p16-28) */
+ break;
+ }
return 0;
- FPU_settag0(loaded_tag);
- break;
- case 030: /* fstenv m14/28byte */
- fstenv(addr_modes, (u_char __user *)data_address);
- return 1;
- case 032: /* fsave */
- fsave(addr_modes, (u_char __user *)data_address);
- return 1;
- case 033: /* fbstp m80dec */
- clear_C1();
- if ( FPU_store_bcd(st0_ptr, st0_tag, (u_char __user *)data_address) )
- pop_0(); /* pop only if the number was actually stored
- (see the 80486 manual p16-28) */
- break;
- case 034: /* fstcw m16int */
- RE_ENTRANT_CHECK_OFF;
- FPU_access_ok(VERIFY_WRITE,data_address,2);
- FPU_put_user(control_word, (unsigned short __user *) data_address);
- RE_ENTRANT_CHECK_ON;
- return 1;
- case 035: /* fstp m80real */
- clear_C1();
- if ( FPU_store_extended(st0_ptr, st0_tag, (long double __user *)data_address) )
- pop_0(); /* pop only if the number was actually stored
- (see the 80486 manual p16-28) */
- break;
- case 036: /* fstsw m2byte */
- RE_ENTRANT_CHECK_OFF;
- FPU_access_ok(VERIFY_WRITE,data_address,2);
- FPU_put_user(status_word(),(unsigned short __user *) data_address);
- RE_ENTRANT_CHECK_ON;
- return 1;
- case 037: /* fistp m64int */
- clear_C1();
- if ( FPU_store_int64(st0_ptr, st0_tag, (long long __user *)data_address) )
- pop_0(); /* pop only if the number was actually stored
- (see the 80486 manual p16-28) */
- break;
- }
- return 0;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-24 14:44:34 +0000