From 871480933a1c28f8a9fed4c4d34d06c439a7a422 Mon Sep 17 00:00:00 2001 From: Srikant Patnaik Date: Sun, 11 Jan 2015 12:28:04 +0530 Subject: Moved, renamed, and deleted files The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure. --- ANDROID_3.4.5/arch/x86/math-emu/errors.c | 689 ------------------------------- 1 file changed, 689 deletions(-) delete mode 100644 ANDROID_3.4.5/arch/x86/math-emu/errors.c (limited to 'ANDROID_3.4.5/arch/x86/math-emu/errors.c') diff --git a/ANDROID_3.4.5/arch/x86/math-emu/errors.c b/ANDROID_3.4.5/arch/x86/math-emu/errors.c deleted file mode 100644 index 59d353d2..00000000 --- a/ANDROID_3.4.5/arch/x86/math-emu/errors.c +++ /dev/null @@ -1,689 +0,0 @@ -/*---------------------------------------------------------------------------+ - | errors.c | - | | - | The error handling functions for wm-FPU-emu | - | | - | Copyright (C) 1992,1993,1994,1996 | - | W. Metzenthen, 22 Parker St, Ormond, Vic 3163, Australia | - | E-mail billm@jacobi.maths.monash.edu.au | - | | - | | - +---------------------------------------------------------------------------*/ - -/*---------------------------------------------------------------------------+ - | Note: | - | The file contains code which accesses user memory. | - | Emulator static data may change when user memory is accessed, due to | - | other processes using the emulator while swapping is in progress. | - +---------------------------------------------------------------------------*/ - -#include - -#include - -#include "fpu_emu.h" -#include "fpu_system.h" -#include "exception.h" -#include "status_w.h" -#include "control_w.h" -#include "reg_constant.h" -#include "version.h" - -/* */ -#undef PRINT_MESSAGES -/* */ - -#if 0 -void Un_impl(void) -{ - u_char byte1, FPU_modrm; - unsigned long address = FPU_ORIG_EIP; - - RE_ENTRANT_CHECK_OFF; - /* No need to check access_ok(), we have previously fetched these bytes. */ - printk("Unimplemented FPU Opcode at eip=%p : ", (void __user *)address); - if (FPU_CS == __USER_CS) { - while (1) { - FPU_get_user(byte1, (u_char __user *) address); - if ((byte1 & 0xf8) == 0xd8) - break; - printk("[%02x]", byte1); - address++; - } - printk("%02x ", byte1); - FPU_get_user(FPU_modrm, 1 + (u_char __user *) address); - - if (FPU_modrm >= 0300) - printk("%02x (%02x+%d)\n", FPU_modrm, FPU_modrm & 0xf8, - FPU_modrm & 7); - else - printk("/%d\n", (FPU_modrm >> 3) & 7); - } else { - printk("cs selector = %04x\n", FPU_CS); - } - - RE_ENTRANT_CHECK_ON; - - EXCEPTION(EX_Invalid); - -} -#endif /* 0 */ - -/* - Called for opcodes which are illegal and which are known to result in a - SIGILL with a real 80486. - */ -void FPU_illegal(void) -{ - math_abort(FPU_info, SIGILL); -} - -void FPU_printall(void) -{ - int i; - static const char *tag_desc[] = { "Valid", "Zero", "ERROR", "Empty", - "DeNorm", "Inf", "NaN" - }; - u_char byte1, FPU_modrm; - unsigned long address = FPU_ORIG_EIP; - - RE_ENTRANT_CHECK_OFF; - /* No need to check access_ok(), we have previously fetched these bytes. */ - printk("At %p:", (void *)address); - if (FPU_CS == __USER_CS) { -#define MAX_PRINTED_BYTES 20 - for (i = 0; i < MAX_PRINTED_BYTES; i++) { - FPU_get_user(byte1, (u_char __user *) address); - if ((byte1 & 0xf8) == 0xd8) { - printk(" %02x", byte1); - break; - } - printk(" [%02x]", byte1); - address++; - } - if (i == MAX_PRINTED_BYTES) - printk(" [more..]\n"); - else { - FPU_get_user(FPU_modrm, 1 + (u_char __user *) address); - - if (FPU_modrm >= 0300) - printk(" %02x (%02x+%d)\n", FPU_modrm, - FPU_modrm & 0xf8, FPU_modrm & 7); - else - printk(" /%d, mod=%d rm=%d\n", - (FPU_modrm >> 3) & 7, - (FPU_modrm >> 6) & 3, FPU_modrm & 7); - } - } else { - printk("%04x\n", FPU_CS); - } - - partial_status = status_word(); - -#ifdef DEBUGGING - if (partial_status & SW_Backward) - printk("SW: backward compatibility\n"); - if (partial_status & SW_C3) - printk("SW: condition bit 3\n"); - if (partial_status & SW_C2) - printk("SW: condition bit 2\n"); - if (partial_status & SW_C1) - printk("SW: condition bit 1\n"); - if (partial_status & SW_C0) - printk("SW: condition bit 0\n"); - if (partial_status & SW_Summary) - printk("SW: exception summary\n"); - if (partial_status & SW_Stack_Fault) - printk("SW: stack fault\n"); - if (partial_status & SW_Precision) - printk("SW: loss of precision\n"); - if (partial_status & SW_Underflow) - printk("SW: underflow\n"); - if (partial_status & SW_Overflow) - printk("SW: overflow\n"); - if (partial_status & SW_Zero_Div) - printk("SW: divide by zero\n"); - if (partial_status & SW_Denorm_Op) - printk("SW: denormalized operand\n"); - if (partial_status & SW_Invalid) - printk("SW: invalid operation\n"); -#endif /* DEBUGGING */ - - printk(" SW: b=%d st=%d es=%d sf=%d cc=%d%d%d%d ef=%d%d%d%d%d%d\n", partial_status & 0x8000 ? 1 : 0, /* busy */ - (partial_status & 0x3800) >> 11, /* stack top pointer */ - partial_status & 0x80 ? 1 : 0, /* Error summary status */ - partial_status & 0x40 ? 1 : 0, /* Stack flag */ - partial_status & SW_C3 ? 1 : 0, partial_status & SW_C2 ? 1 : 0, /* cc */ - partial_status & SW_C1 ? 1 : 0, partial_status & SW_C0 ? 1 : 0, /* cc */ - partial_status & SW_Precision ? 1 : 0, - partial_status & SW_Underflow ? 1 : 0, - partial_status & SW_Overflow ? 1 : 0, - partial_status & SW_Zero_Div ? 1 : 0, - partial_status & SW_Denorm_Op ? 1 : 0, - partial_status & SW_Invalid ? 1 : 0); - - printk(" CW: ic=%d rc=%d%d pc=%d%d iem=%d ef=%d%d%d%d%d%d\n", - control_word & 0x1000 ? 1 : 0, - (control_word & 0x800) >> 11, (control_word & 0x400) >> 10, - (control_word & 0x200) >> 9, (control_word & 0x100) >> 8, - control_word & 0x80 ? 1 : 0, - control_word & SW_Precision ? 1 : 0, - control_word & SW_Underflow ? 1 : 0, - control_word & SW_Overflow ? 1 : 0, - control_word & SW_Zero_Div ? 1 : 0, - control_word & SW_Denorm_Op ? 1 : 0, - control_word & SW_Invalid ? 1 : 0); - - for (i = 0; i < 8; i++) { - FPU_REG *r = &st(i); - u_char tagi = FPU_gettagi(i); - switch (tagi) { - case TAG_Empty: - continue; - break; - case TAG_Zero: - case TAG_Special: - tagi = FPU_Special(r); - case TAG_Valid: - printk("st(%d) %c .%04lx %04lx %04lx %04lx e%+-6d ", i, - getsign(r) ? '-' : '+', - (long)(r->sigh >> 16), - (long)(r->sigh & 0xFFFF), - (long)(r->sigl >> 16), - (long)(r->sigl & 0xFFFF), - exponent(r) - EXP_BIAS + 1); - break; - default: - printk("Whoops! Error in errors.c: tag%d is %d ", i, - tagi); - continue; - break; - } - printk("%s\n", tag_desc[(int)(unsigned)tagi]); - } - - RE_ENTRANT_CHECK_ON; - -} - -static struct { - int type; - const char *name; -} exception_names[] = { - { - EX_StackOver, "stack overflow"}, { - EX_StackUnder, "stack underflow"}, { - EX_Precision, "loss of precision"}, { - EX_Underflow, "underflow"}, { - EX_Overflow, "overflow"}, { - EX_ZeroDiv, "divide by zero"}, { - EX_Denormal, "denormalized operand"}, { - EX_Invalid, "invalid operation"}, { - EX_INTERNAL, "INTERNAL BUG in " FPU_VERSION}, { - 0, NULL} -}; - -/* - EX_INTERNAL is always given with a code which indicates where the - error was detected. - - Internal error types: - 0x14 in fpu_etc.c - 0x1nn in a *.c file: - 0x101 in reg_add_sub.c - 0x102 in reg_mul.c - 0x104 in poly_atan.c - 0x105 in reg_mul.c - 0x107 in fpu_trig.c - 0x108 in reg_compare.c - 0x109 in reg_compare.c - 0x110 in reg_add_sub.c - 0x111 in fpe_entry.c - 0x112 in fpu_trig.c - 0x113 in errors.c - 0x115 in fpu_trig.c - 0x116 in fpu_trig.c - 0x117 in fpu_trig.c - 0x118 in fpu_trig.c - 0x119 in fpu_trig.c - 0x120 in poly_atan.c - 0x121 in reg_compare.c - 0x122 in reg_compare.c - 0x123 in reg_compare.c - 0x125 in fpu_trig.c - 0x126 in fpu_entry.c - 0x127 in poly_2xm1.c - 0x128 in fpu_entry.c - 0x129 in fpu_entry.c - 0x130 in get_address.c - 0x131 in get_address.c - 0x132 in get_address.c - 0x133 in get_address.c - 0x140 in load_store.c - 0x141 in load_store.c - 0x150 in poly_sin.c - 0x151 in poly_sin.c - 0x160 in reg_ld_str.c - 0x161 in reg_ld_str.c - 0x162 in reg_ld_str.c - 0x163 in reg_ld_str.c - 0x164 in reg_ld_str.c - 0x170 in fpu_tags.c - 0x171 in fpu_tags.c - 0x172 in fpu_tags.c - 0x180 in reg_convert.c - 0x2nn in an *.S file: - 0x201 in reg_u_add.S - 0x202 in reg_u_div.S - 0x203 in reg_u_div.S - 0x204 in reg_u_div.S - 0x205 in reg_u_mul.S - 0x206 in reg_u_sub.S - 0x207 in wm_sqrt.S - 0x208 in reg_div.S - 0x209 in reg_u_sub.S - 0x210 in reg_u_sub.S - 0x211 in reg_u_sub.S - 0x212 in reg_u_sub.S - 0x213 in wm_sqrt.S - 0x214 in wm_sqrt.S - 0x215 in wm_sqrt.S - 0x220 in reg_norm.S - 0x221 in reg_norm.S - 0x230 in reg_round.S - 0x231 in reg_round.S - 0x232 in reg_round.S - 0x233 in reg_round.S - 0x234 in reg_round.S - 0x235 in reg_round.S - 0x236 in reg_round.S - 0x240 in div_Xsig.S - 0x241 in div_Xsig.S - 0x242 in div_Xsig.S - */ - -asmlinkage void FPU_exception(int n) -{ - int i, int_type; - - int_type = 0; /* Needed only to stop compiler warnings */ - if (n & EX_INTERNAL) { - int_type = n - EX_INTERNAL; - n = EX_INTERNAL; - /* Set lots of exception bits! */ - partial_status |= (SW_Exc_Mask | SW_Summary | SW_Backward); - } else { - /* Extract only the bits which we use to set the status word */ - n &= (SW_Exc_Mask); - /* Set the corresponding exception bit */ - partial_status |= n; - /* Set summary bits iff exception isn't masked */ - if (partial_status & ~control_word & CW_Exceptions) - partial_status |= (SW_Summary | SW_Backward); - if (n & (SW_Stack_Fault | EX_Precision)) { - if (!(n & SW_C1)) - /* This bit distinguishes over- from underflow for a stack fault, - and roundup from round-down for precision loss. */ - partial_status &= ~SW_C1; - } - } - - RE_ENTRANT_CHECK_OFF; - if ((~control_word & n & CW_Exceptions) || (n == EX_INTERNAL)) { -#ifdef PRINT_MESSAGES - /* My message from the sponsor */ - printk(FPU_VERSION " " __DATE__ " (C) W. Metzenthen.\n"); -#endif /* PRINT_MESSAGES */ - - /* Get a name string for error reporting */ - for (i = 0; exception_names[i].type; i++) - if ((exception_names[i].type & n) == - exception_names[i].type) - break; - - if (exception_names[i].type) { -#ifdef PRINT_MESSAGES - printk("FP Exception: %s!\n", exception_names[i].name); -#endif /* PRINT_MESSAGES */ - } else - printk("FPU emulator: Unknown Exception: 0x%04x!\n", n); - - if (n == EX_INTERNAL) { - printk("FPU emulator: Internal error type 0x%04x\n", - int_type); - FPU_printall(); - } -#ifdef PRINT_MESSAGES - else - FPU_printall(); -#endif /* PRINT_MESSAGES */ - - /* - * The 80486 generates an interrupt on the next non-control FPU - * instruction. So we need some means of flagging it. - * We use the ES (Error Summary) bit for this. - */ - } - RE_ENTRANT_CHECK_ON; - -#ifdef __DEBUG__ - math_abort(FPU_info, SIGFPE); -#endif /* __DEBUG__ */ - -} - -/* Real operation attempted on a NaN. */ -/* Returns < 0 if the exception is unmasked */ -int real_1op_NaN(FPU_REG *a) -{ - int signalling, isNaN; - - isNaN = (exponent(a) == EXP_OVER) && (a->sigh & 0x80000000); - - /* The default result for the case of two "equal" NaNs (signs may - differ) is chosen to reproduce 80486 behaviour */ - signalling = isNaN && !(a->sigh & 0x40000000); - - if (!signalling) { - if (!isNaN) { /* pseudo-NaN, or other unsupported? */ - if (control_word & CW_Invalid) { - /* Masked response */ - reg_copy(&CONST_QNaN, a); - } - EXCEPTION(EX_Invalid); - return (!(control_word & CW_Invalid) ? FPU_Exception : - 0) | TAG_Special; - } - return TAG_Special; - } - - if (control_word & CW_Invalid) { - /* The masked response */ - if (!(a->sigh & 0x80000000)) { /* pseudo-NaN ? */ - reg_copy(&CONST_QNaN, a); - } - /* ensure a Quiet NaN */ - a->sigh |= 0x40000000; - } - - EXCEPTION(EX_Invalid); - - return (!(control_word & CW_Invalid) ? FPU_Exception : 0) | TAG_Special; -} - -/* Real operation attempted on two operands, one a NaN. */ -/* Returns < 0 if the exception is unmasked */ -int real_2op_NaN(FPU_REG const *b, u_char tagb, - int deststnr, FPU_REG const *defaultNaN) -{ - FPU_REG *dest = &st(deststnr); - FPU_REG const *a = dest; - u_char taga = FPU_gettagi(deststnr); - FPU_REG const *x; - int signalling, unsupported; - - if (taga == TAG_Special) - taga = FPU_Special(a); - if (tagb == TAG_Special) - tagb = FPU_Special(b); - - /* TW_NaN is also used for unsupported data types. */ - unsupported = ((taga == TW_NaN) - && !((exponent(a) == EXP_OVER) - && (a->sigh & 0x80000000))) - || ((tagb == TW_NaN) - && !((exponent(b) == EXP_OVER) && (b->sigh & 0x80000000))); - if (unsupported) { - if (control_word & CW_Invalid) { - /* Masked response */ - FPU_copy_to_regi(&CONST_QNaN, TAG_Special, deststnr); - } - EXCEPTION(EX_Invalid); - return (!(control_word & CW_Invalid) ? FPU_Exception : 0) | - TAG_Special; - } - - if (taga == TW_NaN) { - x = a; - if (tagb == TW_NaN) { - signalling = !(a->sigh & b->sigh & 0x40000000); - if (significand(b) > significand(a)) - x = b; - else if (significand(b) == significand(a)) { - /* The default result for the case of two "equal" NaNs (signs may - differ) is chosen to reproduce 80486 behaviour */ - x = defaultNaN; - } - } else { - /* return the quiet version of the NaN in a */ - signalling = !(a->sigh & 0x40000000); - } - } else -#ifdef PARANOID - if (tagb == TW_NaN) -#endif /* PARANOID */ - { - signalling = !(b->sigh & 0x40000000); - x = b; - } -#ifdef PARANOID - else { - signalling = 0; - EXCEPTION(EX_INTERNAL | 0x113); - x = &CONST_QNaN; - } -#endif /* PARANOID */ - - if ((!signalling) || (control_word & CW_Invalid)) { - if (!x) - x = b; - - if (!(x->sigh & 0x80000000)) /* pseudo-NaN ? */ - x = &CONST_QNaN; - - FPU_copy_to_regi(x, TAG_Special, deststnr); - - if (!signalling) - return TAG_Special; - - /* ensure a Quiet NaN */ - dest->sigh |= 0x40000000; - } - - EXCEPTION(EX_Invalid); - - return (!(control_word & CW_Invalid) ? FPU_Exception : 0) | TAG_Special; -} - -/* Invalid arith operation on Valid registers */ -/* Returns < 0 if the exception is unmasked */ -asmlinkage int arith_invalid(int deststnr) -{ - - EXCEPTION(EX_Invalid); - - if (control_word & CW_Invalid) { - /* The masked response */ - FPU_copy_to_regi(&CONST_QNaN, TAG_Special, deststnr); - } - - return (!(control_word & CW_Invalid) ? FPU_Exception : 0) | TAG_Valid; - -} - -/* Divide a finite number by zero */ -asmlinkage int FPU_divide_by_zero(int deststnr, u_char sign) -{ - FPU_REG *dest = &st(deststnr); - int tag = TAG_Valid; - - if (control_word & CW_ZeroDiv) { - /* The masked response */ - FPU_copy_to_regi(&CONST_INF, TAG_Special, deststnr); - setsign(dest, sign); - tag = TAG_Special; - } - - EXCEPTION(EX_ZeroDiv); - - return (!(control_word & CW_ZeroDiv) ? FPU_Exception : 0) | tag; - -} - -/* This may be called often, so keep it lean */ -int set_precision_flag(int flags) -{ - if (control_word & CW_Precision) { - partial_status &= ~(SW_C1 & flags); - partial_status |= flags; /* The masked response */ - return 0; - } else { - EXCEPTION(flags); - return 1; - } -} - -/* This may be called often, so keep it lean */ -asmlinkage void set_precision_flag_up(void) -{ - if (control_word & CW_Precision) - partial_status |= (SW_Precision | SW_C1); /* The masked response */ - else - EXCEPTION(EX_Precision | SW_C1); -} - -/* This may be called often, so keep it lean */ -asmlinkage void set_precision_flag_down(void) -{ - if (control_word & CW_Precision) { /* The masked response */ - partial_status &= ~SW_C1; - partial_status |= SW_Precision; - } else - EXCEPTION(EX_Precision); -} - -asmlinkage int denormal_operand(void) -{ - if (control_word & CW_Denormal) { /* The masked response */ - partial_status |= SW_Denorm_Op; - return TAG_Special; - } else { - EXCEPTION(EX_Denormal); - return TAG_Special | FPU_Exception; - } -} - -asmlinkage int arith_overflow(FPU_REG *dest) -{ - int tag = TAG_Valid; - - if (control_word & CW_Overflow) { - /* The masked response */ -/* ###### The response here depends upon the rounding mode */ - reg_copy(&CONST_INF, dest); - tag = TAG_Special; - } else { - /* Subtract the magic number from the exponent */ - addexponent(dest, (-3 * (1 << 13))); - } - - EXCEPTION(EX_Overflow); - if (control_word & CW_Overflow) { - /* The overflow exception is masked. */ - /* By definition, precision is lost. - The roundup bit (C1) is also set because we have - "rounded" upwards to Infinity. */ - EXCEPTION(EX_Precision | SW_C1); - return tag; - } - - return tag; - -} - -asmlinkage int arith_underflow(FPU_REG *dest) -{ - int tag = TAG_Valid; - - if (control_word & CW_Underflow) { - /* The masked response */ - if (exponent16(dest) <= EXP_UNDER - 63) { - reg_copy(&CONST_Z, dest); - partial_status &= ~SW_C1; /* Round down. */ - tag = TAG_Zero; - } else { - stdexp(dest); - } - } else { - /* Add the magic number to the exponent. */ - addexponent(dest, (3 * (1 << 13)) + EXTENDED_Ebias); - } - - EXCEPTION(EX_Underflow); - if (control_word & CW_Underflow) { - /* The underflow exception is masked. */ - EXCEPTION(EX_Precision); - return tag; - } - - return tag; - -} - -void FPU_stack_overflow(void) -{ - - if (control_word & CW_Invalid) { - /* The masked response */ - top--; - FPU_copy_to_reg0(&CONST_QNaN, TAG_Special); - } - - EXCEPTION(EX_StackOver); - - return; - -} - -void FPU_stack_underflow(void) -{ - - if (control_word & CW_Invalid) { - /* The masked response */ - FPU_copy_to_reg0(&CONST_QNaN, TAG_Special); - } - - EXCEPTION(EX_StackUnder); - - return; - -} - -void FPU_stack_underflow_i(int i) -{ - - if (control_word & CW_Invalid) { - /* The masked response */ - FPU_copy_to_regi(&CONST_QNaN, TAG_Special, i); - } - - EXCEPTION(EX_StackUnder); - - return; - -} - -void FPU_stack_underflow_pop(int i) -{ - - if (control_word & CW_Invalid) { - /* The masked response */ - FPU_copy_to_regi(&CONST_QNaN, TAG_Special, i); - FPU_pop(); - } - - EXCEPTION(EX_StackUnder); - - return; - -} -- cgit