| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <479D067E.3010100@gmail.com>
Date: Mon, 28 Jan 2008 01:32:30 +0300
From: Dmitri Vorobiev <dmitri.vorobiev@...il.com>
To: Paolo Ciarrocchi <paolo.ciarrocchi@...il.com>
CC: Linux Kernel <linux-kernel@...r.kernel.org>,
Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH] X86: coding style fixes to arch/x86/math-errors.c - take
2
Paolo Ciarrocchi пишет:
> This file has not been modified since October so should be
> easy to integrate the following patch.
>
> Before:
> total: 214 errors, 28 warnings, 739 lines checked
>
> After:
> total: 4 errors, 28 warnings, 708 lines checked
>
> Compile tested:
>
> paolo@...lo-desktop:/tmp$ size error.o.*
> text data bss dec hex filename
> 3476 0 0 3476 d94 error.o.after
> 3476 0 0 3476 d94 error.o.before
>
>
> paolo@...lo-desktop:/tmp$ md5sum error.o.*
> f0b89bbbc0e24b74b0d78270bd3a4dd1 error.o.after
> a1e8d0723421256a1a21b2fc2add9031 error.o.before
>
> Should I be worried about the md5sum difference?
>
Looks like it would be better to proceed in the following manner:
1) remove dead code (no md5 change);
2) reformat the lines to use tabs, not spaces (no md5 change);
3) address the "else-braces" and "single statement block" errors
(no md5 change);
4) remove all unnecessary spaces (no md5 change);
5) add the KERN_ macros (md5 will change).
6) address remaining checkpatch complaints (no md5 change wrt #5
above).
Each item above might get into a separate patch.
See more comments below.
> Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@...il.com>
> ---
>
> The only remaining errors are like the following:
>
> ERROR: need consistent spacing around '*' (ctx:WxB)
> #110: FILE: errors.c:110:
> + FPU_get_user(FPU_modrm, 1 + (u_char __user *) address);
> ^
> Any hint on how to fix them?
>
> arch/x86/math-emu/errors.c | 405 ++++++++++++++++++++------------------------
> 1 files changed, 187 insertions(+), 218 deletions(-)
>
> diff --git a/arch/x86/math-emu/errors.c b/arch/x86/math-emu/errors.c
> index a1b0d22..fa23366 100644
> --- a/arch/x86/math-emu/errors.c
> +++ b/arch/x86/math-emu/errors.c
> @@ -43,25 +43,23 @@ void Un_impl(void)
> 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 )
> - {
> + if (FPU_CS == __USER_CS) {
> + while (1) {
> FPU_get_user(byte1, (u_char __user *) address);
> - if ( (byte1 & 0xf8) == 0xd8 ) break;
> + 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
> - {
> + else {
> printk("cs selector = %04x\n", FPU_CS);
> }
>
Is there any point in changing code inside the #if 0/#endif block?
> @@ -76,10 +74,10 @@ void Un_impl(void)
> /*
> 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);
> + math_abort(FPU_info, SIGILL);
> }
>
>
> @@ -88,61 +86,69 @@ void FPU_printall(void)
> {
> int i;
> static const char *tag_desc[] = { "Valid", "Zero", "ERROR", "Empty",
> - "DeNorm", "Inf", "NaN" };
> + "DeNorm", "Inf", "NaN" };
Umm... Why?
> 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 )
> - {
> + if (FPU_CS == __USER_CS) {
> #define MAX_PRINTED_BYTES 20
> - for ( i = 0; i < MAX_PRINTED_BYTES; i++ )
> - {
> + for (i = 0; i < MAX_PRINTED_BYTES; i++) {
> FPU_get_user(byte1, (u_char __user *) address);
> - if ( (byte1 & 0xf8) == 0xd8 )
> - {
> + if ((byte1 & 0xf8) == 0xd8) {
> printk(" %02x", byte1);
> break;
> }
> printk(" [%02x]", byte1);
> address++;
> }
> - if ( i == MAX_PRINTED_BYTES )
> + if (i == MAX_PRINTED_BYTES)
> printk(" [more..]\n");
> - else
> - {
> + 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);
> + 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");
> +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=%ld es=%d sf=%d cc=%d%d%d%d ef=%d%d%d%d%d%d\n",
> @@ -155,7 +161,7 @@ if ( partial_status & SW_Invalid ) printk("SW: invalid operation\n");
> 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=%ld%ld pc=%ld%ld iem=%d ef=%d%d%d%d%d%d\n",
> control_word & 0x1000 ? 1 : 0,
> (control_word & 0x800) >> 11, (control_word & 0x400) >> 10,
> @@ -165,12 +171,10 @@ printk(" CW: ic=%d rc=%ld%ld pc=%ld%ld iem=%d ef=%d%d%d%d%d%d\n",
> 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++ )
> - {
> + for (i = 0; i < 8; i++) {
> FPU_REG *r = &st(i);
> u_char tagi = FPU_gettagi(i);
> - switch (tagi)
> - {
> + switch (tagi) {
> case TAG_Empty:
> continue;
> break;
> @@ -219,78 +223,78 @@ static struct {
> 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
> + 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)
> @@ -298,25 +302,22 @@ asmlinkage void FPU_exception(int n)
> int i, int_type;
>
> int_type = 0; /* Needed only to stop compiler warnings */
> - if ( n & EX_INTERNAL )
> - {
> + 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
> - {
> + 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 )
> + if (partial_status & ~control_word & CW_Exceptions)
> partial_status |= (SW_Summary | SW_Backward);
> - if ( n & (SW_Stack_Fault | EX_Precision) )
> - {
> - if ( !(n & SW_C1) )
> + 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;
> @@ -324,29 +325,26 @@ asmlinkage void FPU_exception(int n)
> }
>
> RE_ENTRANT_CHECK_OFF;
> - if ( (~control_word & n & CW_Exceptions) || (n == EX_INTERNAL) )
> - {
> + 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 )
> + for (i = 0; exception_names[i].type; i++)
> + if ((exception_names[i].type & n) == exception_names[i].type)
> break;
> -
> - if (exception_names[i].type)
> - {
> +
> + 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 )
> - {
> +
> + if (n == EX_INTERNAL) {
> printk("FPU emulator: Internal error type 0x%04x\n", int_type);
> FPU_printall();
> }
> @@ -364,7 +362,7 @@ asmlinkage void FPU_exception(int n)
> RE_ENTRANT_CHECK_ON;
>
> #ifdef __DEBUG__
> - math_abort(FPU_info,SIGFPE);
> + math_abort(FPU_info, SIGFPE);
> #endif /* __DEBUG__ */
>
> }
> @@ -382,12 +380,10 @@ int real_1op_NaN(FPU_REG *a)
> 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 )
> - {
> + if (!signalling) {
> + if (!isNaN) {
> + /* pseudo-NaN, or other unsupported? */
> + if (control_word & CW_Invalid) {
> /* Masked response */
> reg_copy(&CONST_QNaN, a);
> }
> @@ -397,11 +393,10 @@ int real_1op_NaN(FPU_REG *a)
> return TAG_Special;
> }
>
> - if ( control_word & CW_Invalid )
> - {
> + if (control_word & CW_Invalid) {
> /* The masked response */
> - if ( !(a->sigh & 0x80000000) ) /* pseudo-NaN ? */
> - {
> + if (!(a->sigh & 0x80000000)) {
> + /* pseudo-NaN ? */
> reg_copy(&CONST_QNaN, a);
> }
> /* ensure a Quiet NaN */
> @@ -426,9 +421,9 @@ int real_2op_NaN(FPU_REG const *b, u_char tagb,
> FPU_REG const *x;
> int signalling, unsupported;
>
> - if ( taga == TAG_Special )
> + if (taga == TAG_Special)
> taga = FPU_Special(a);
> - if ( tagb == TAG_Special )
> + if (tagb == TAG_Special)
> tagb = FPU_Special(b);
>
> /* TW_NaN is also used for unsupported data types. */
> @@ -436,10 +431,8 @@ int real_2op_NaN(FPU_REG const *b, u_char tagb,
> && !((exponent(a) == EXP_OVER) && (a->sigh & 0x80000000)))
> || ((tagb == TW_NaN)
> && !((exponent(b) == EXP_OVER) && (b->sigh & 0x80000000)));
> - if ( unsupported )
> - {
> - if ( control_word & CW_Invalid )
> - {
> + if (unsupported) {
> + if (control_word & CW_Invalid) {
> /* Masked response */
> FPU_copy_to_regi(&CONST_QNaN, TAG_Special, deststnr);
> }
> @@ -447,23 +440,19 @@ int real_2op_NaN(FPU_REG const *b, u_char tagb,
> return (!(control_word & CW_Invalid) ? FPU_Exception : 0) | TAG_Special;
> }
>
> - if (taga == TW_NaN)
> - {
> + if (taga == TW_NaN) {
> x = a;
> - if (tagb == TW_NaN)
> - {
> + if (tagb == TW_NaN) {
> signalling = !(a->sigh & b->sigh & 0x40000000);
> - if ( significand(b) > significand(a) )
> + if (significand(b) > significand(a))
> x = b;
> - else if ( significand(b) == significand(a) )
> - {
> + 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
> - {
> + else {
> /* return the quiet version of the NaN in a */
> signalling = !(a->sigh & 0x40000000);
> }
> @@ -477,25 +466,23 @@ int real_2op_NaN(FPU_REG const *b, u_char tagb,
> x = b;
> }
> #ifdef PARANOID
> - else
> - {
> + else {
> signalling = 0;
> EXCEPTION(EX_INTERNAL|0x113);
> x = &CONST_QNaN;
> }
> #endif /* PARANOID */
>
> - if ( (!signalling) || (control_word & CW_Invalid) )
> - {
> - if ( ! x )
> + if ((!signalling) || (control_word & CW_Invalid)) {
> + if (!x)
> x = b;
>
> - if ( !(x->sigh & 0x80000000) ) /* pseudo-NaN ? */
> + if (!(x->sigh & 0x80000000)) /* pseudo-NaN ? */
> x = &CONST_QNaN;
>
> FPU_copy_to_regi(x, TAG_Special, deststnr);
>
> - if ( !signalling )
> + if (!signalling)
> return TAG_Special;
>
> /* ensure a Quiet NaN */
> @@ -514,13 +501,12 @@ asmlinkage int arith_invalid(int deststnr)
> {
>
> EXCEPTION(EX_Invalid);
> -
> - if ( control_word & CW_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;
>
> }
> @@ -532,14 +518,13 @@ 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 )
> - {
> + 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;
> @@ -550,14 +535,12 @@ asmlinkage int FPU_divide_by_zero(int deststnr, u_char sign)
> /* This may be called often, so keep it lean */
> int set_precision_flag(int flags)
> {
> - if ( control_word & CW_Precision )
> - {
> + if (control_word & CW_Precision) {
> partial_status &= ~(SW_C1 & flags);
> partial_status |= flags; /* The masked response */
> return 0;
> }
> - else
> - {
> + else {
> EXCEPTION(flags);
> return 1;
> }
> @@ -567,7 +550,7 @@ int set_precision_flag(int flags)
> /* This may be called often, so keep it lean */
> asmlinkage void set_precision_flag_up(void)
> {
> - if ( control_word & CW_Precision )
> + if (control_word & CW_Precision)
> partial_status |= (SW_Precision | SW_C1); /* The masked response */
> else
> EXCEPTION(EX_Precision | SW_C1);
> @@ -577,8 +560,8 @@ asmlinkage void set_precision_flag_up(void)
> /* This may be called often, so keep it lean */
> asmlinkage void set_precision_flag_down(void)
> {
> - if ( control_word & CW_Precision )
> - { /* The masked response */
> + if (control_word & CW_Precision) {
> + /* The masked response */
> partial_status &= ~SW_C1;
> partial_status |= SW_Precision;
> }
> @@ -587,15 +570,14 @@ asmlinkage void set_precision_flag_down(void)
> }
>
>
> -asmlinkage int denormal_operand(void)
> + asmlinkage int denormal_operand(void)
> {
> - if ( control_word & CW_Denormal )
> - { /* The masked response */
> + if (control_word & CW_Denormal) {
> + /* The masked response */
> partial_status |= SW_Denorm_Op;
> return TAG_Special;
> }
> - else
> - {
> + else {
> EXCEPTION(EX_Denormal);
> return TAG_Special | FPU_Exception;
> }
> @@ -606,22 +588,19 @@ asmlinkage int arith_overflow(FPU_REG *dest)
> {
> int tag = TAG_Valid;
>
> - if ( control_word & CW_Overflow )
> - {
> + 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
> - {
> + else {
> /* Subtract the magic number from the exponent */
> addexponent(dest, (-3 * (1 << 13)));
> }
>
> EXCEPTION(EX_Overflow);
> - if ( control_word & CW_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
> @@ -639,33 +618,27 @@ asmlinkage int arith_underflow(FPU_REG *dest)
> {
> int tag = TAG_Valid;
>
> - if ( control_word & CW_Underflow )
> - {
> + if (control_word & CW_Underflow) {
> /* The masked response */
> - if ( exponent16(dest) <= EXP_UNDER - 63 )
> - {
> + if (exponent16(dest) <= EXP_UNDER - 63) {
> reg_copy(&CONST_Z, dest);
> partial_status &= ~SW_C1; /* Round down. */
> tag = TAG_Zero;
> }
> else
> - {
> stdexp(dest);
> - }
> }
> - else
> - {
> + else {
> /* Add the magic number to the exponent. */
> addexponent(dest, (3 * (1 << 13)) + EXTENDED_Ebias);
> }
>
> EXCEPTION(EX_Underflow);
> - if ( control_word & CW_Underflow )
> - {
> + if (control_word & CW_Underflow) {
> /* The underflow exception is masked. */
> EXCEPTION(EX_Precision);
> return tag;
> - }
> + }
>
> return tag;
>
> @@ -675,12 +648,11 @@ asmlinkage int arith_underflow(FPU_REG *dest)
> void FPU_stack_overflow(void)
> {
>
> - if ( control_word & CW_Invalid )
> - {
> - /* The masked response */
> - top--;
> + if (control_word & CW_Invalid) {
> + /* The masked response */
> + top--;
> FPU_copy_to_reg0(&CONST_QNaN, TAG_Special);
> - }
> + }
>
> EXCEPTION(EX_StackOver);
>
> @@ -692,11 +664,10 @@ void FPU_stack_overflow(void)
> void FPU_stack_underflow(void)
> {
>
> - if ( control_word & CW_Invalid )
> - {
> - /* The masked response */
> - FPU_copy_to_reg0(&CONST_QNaN, TAG_Special);
> - }
> + if (control_word & CW_Invalid) {
> + /* The masked response */
> + FPU_copy_to_reg0(&CONST_QNaN, TAG_Special);
> + }
>
> EXCEPTION(EX_StackUnder);
>
> @@ -708,11 +679,10 @@ void FPU_stack_underflow(void)
> void FPU_stack_underflow_i(int i)
> {
>
> - if ( control_word & CW_Invalid )
> - {
> + if (control_word & CW_Invalid) {
> /* The masked response */
> FPU_copy_to_regi(&CONST_QNaN, TAG_Special, i);
> - }
> + }
>
> EXCEPTION(EX_StackUnder);
>
> @@ -724,12 +694,11 @@ void FPU_stack_underflow_i(int i)
> void FPU_stack_underflow_pop(int i)
> {
>
> - if ( control_word & CW_Invalid )
> - {
> + if (control_word & CW_Invalid) {
> /* The masked response */
> FPU_copy_to_regi(&CONST_QNaN, TAG_Special, i);
> FPU_pop();
> - }
> + }
>
> EXCEPTION(EX_StackUnder);
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists