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author | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:30:11 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:30:11 +0100 |
commit | 3d0d14f983b55a570b976976284df4c434af3223 (patch) | |
tree | 864f11c0ce5ee1e15acdd196018b79d0d0e2685d /arch/x86/math-emu/reg_divide.c | |
parent | a4ec1effce83796209a0258602b0cf50026d86f2 (diff) | |
download | linux-stable-3d0d14f983b55a570b976976284df4c434af3223.tar.gz linux-stable-3d0d14f983b55a570b976976284df4c434af3223.tar.bz2 linux-stable-3d0d14f983b55a570b976976284df4c434af3223.zip |
x86: lindent arch/i386/math-emu
lindent these files:
errors lines of code errors/KLOC
arch/x86/math-emu/ 2236 9424 237.2
arch/x86/math-emu/ 128 8706 14.7
no other changes. No code changed:
text data bss dec hex filename
5589802 612739 3833856 10036397 9924ad vmlinux.before
5589802 612739 3833856 10036397 9924ad vmlinux.after
the intent of this patch is to ease the automated tracking of kernel
code quality - it's just much easier for us to maintain it if every file
in arch/x86 is supposed to be clean.
NOTE: it is a known problem of lindent that it causes some style damage
of its own, but it's a safe tool (well, except for the gcc array range
initializers extension), so we did the bulk of the changes via lindent,
and did the manual fixups in a followup patch.
the resulting math-emu code has been tested by Thomas Gleixner on a real
386 DX CPU as well, and it works fine.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/math-emu/reg_divide.c')
-rw-r--r-- | arch/x86/math-emu/reg_divide.c | 301 |
1 files changed, 138 insertions, 163 deletions
diff --git a/arch/x86/math-emu/reg_divide.c b/arch/x86/math-emu/reg_divide.c index 5cee7ff920d9..6827012db341 100644 --- a/arch/x86/math-emu/reg_divide.c +++ b/arch/x86/math-emu/reg_divide.c @@ -26,182 +26,157 @@ */ int FPU_div(int flags, int rm, int control_w) { - FPU_REG x, y; - FPU_REG const *a, *b, *st0_ptr, *st_ptr; - FPU_REG *dest; - u_char taga, tagb, signa, signb, sign, saved_sign; - int tag, deststnr; - - if ( flags & DEST_RM ) - deststnr = rm; - else - deststnr = 0; - - if ( flags & REV ) - { - b = &st(0); - st0_ptr = b; - tagb = FPU_gettag0(); - if ( flags & LOADED ) - { - a = (FPU_REG *)rm; - taga = flags & 0x0f; + FPU_REG x, y; + FPU_REG const *a, *b, *st0_ptr, *st_ptr; + FPU_REG *dest; + u_char taga, tagb, signa, signb, sign, saved_sign; + int tag, deststnr; + + if (flags & DEST_RM) + deststnr = rm; + else + deststnr = 0; + + if (flags & REV) { + b = &st(0); + st0_ptr = b; + tagb = FPU_gettag0(); + if (flags & LOADED) { + a = (FPU_REG *) rm; + taga = flags & 0x0f; + } else { + a = &st(rm); + st_ptr = a; + taga = FPU_gettagi(rm); + } + } else { + a = &st(0); + st0_ptr = a; + taga = FPU_gettag0(); + if (flags & LOADED) { + b = (FPU_REG *) rm; + tagb = flags & 0x0f; + } else { + b = &st(rm); + st_ptr = b; + tagb = FPU_gettagi(rm); + } } - else - { - a = &st(rm); - st_ptr = a; - taga = FPU_gettagi(rm); - } - } - else - { - a = &st(0); - st0_ptr = a; - taga = FPU_gettag0(); - if ( flags & LOADED ) - { - b = (FPU_REG *)rm; - tagb = flags & 0x0f; - } - else - { - b = &st(rm); - st_ptr = b; - tagb = FPU_gettagi(rm); - } - } - signa = getsign(a); - signb = getsign(b); + signa = getsign(a); + signb = getsign(b); - sign = signa ^ signb; + sign = signa ^ signb; - dest = &st(deststnr); - saved_sign = getsign(dest); + dest = &st(deststnr); + saved_sign = getsign(dest); - if ( !(taga | tagb) ) - { - /* Both regs Valid, this should be the most common case. */ - reg_copy(a, &x); - reg_copy(b, &y); - setpositive(&x); - setpositive(&y); - tag = FPU_u_div(&x, &y, dest, control_w, sign); + if (!(taga | tagb)) { + /* Both regs Valid, this should be the most common case. */ + reg_copy(a, &x); + reg_copy(b, &y); + setpositive(&x); + setpositive(&y); + tag = FPU_u_div(&x, &y, dest, control_w, sign); - if ( tag < 0 ) - return tag; + if (tag < 0) + return tag; - FPU_settagi(deststnr, tag); - return tag; - } + FPU_settagi(deststnr, tag); + return tag; + } - if ( taga == TAG_Special ) - taga = FPU_Special(a); - if ( tagb == TAG_Special ) - tagb = FPU_Special(b); + if (taga == TAG_Special) + taga = FPU_Special(a); + if (tagb == TAG_Special) + tagb = FPU_Special(b); - if ( ((taga == TAG_Valid) && (tagb == TW_Denormal)) + if (((taga == TAG_Valid) && (tagb == TW_Denormal)) || ((taga == TW_Denormal) && (tagb == TAG_Valid)) - || ((taga == TW_Denormal) && (tagb == TW_Denormal)) ) - { - if ( denormal_operand() < 0 ) - return FPU_Exception; - - FPU_to_exp16(a, &x); - FPU_to_exp16(b, &y); - tag = FPU_u_div(&x, &y, dest, control_w, sign); - if ( tag < 0 ) - return tag; - - FPU_settagi(deststnr, tag); - return tag; - } - else if ( (taga <= TW_Denormal) && (tagb <= TW_Denormal) ) - { - if ( tagb != TAG_Zero ) - { - /* Want to find Zero/Valid */ - if ( tagb == TW_Denormal ) - { - if ( denormal_operand() < 0 ) - return FPU_Exception; - } - - /* The result is zero. */ - FPU_copy_to_regi(&CONST_Z, TAG_Zero, deststnr); - setsign(dest, sign); - return TAG_Zero; + || ((taga == TW_Denormal) && (tagb == TW_Denormal))) { + if (denormal_operand() < 0) + return FPU_Exception; + + FPU_to_exp16(a, &x); + FPU_to_exp16(b, &y); + tag = FPU_u_div(&x, &y, dest, control_w, sign); + if (tag < 0) + return tag; + + FPU_settagi(deststnr, tag); + return tag; + } else if ((taga <= TW_Denormal) && (tagb <= TW_Denormal)) { + if (tagb != TAG_Zero) { + /* Want to find Zero/Valid */ + if (tagb == TW_Denormal) { + if (denormal_operand() < 0) + return FPU_Exception; + } + + /* The result is zero. */ + FPU_copy_to_regi(&CONST_Z, TAG_Zero, deststnr); + setsign(dest, sign); + return TAG_Zero; + } + /* We have an exception condition, either 0/0 or Valid/Zero. */ + if (taga == TAG_Zero) { + /* 0/0 */ + return arith_invalid(deststnr); + } + /* Valid/Zero */ + return FPU_divide_by_zero(deststnr, sign); } - /* We have an exception condition, either 0/0 or Valid/Zero. */ - if ( taga == TAG_Zero ) - { - /* 0/0 */ - return arith_invalid(deststnr); + /* Must have infinities, NaNs, etc */ + else if ((taga == TW_NaN) || (tagb == TW_NaN)) { + if (flags & LOADED) + return real_2op_NaN((FPU_REG *) rm, flags & 0x0f, 0, + st0_ptr); + + if (flags & DEST_RM) { + int tag; + tag = FPU_gettag0(); + if (tag == TAG_Special) + tag = FPU_Special(st0_ptr); + return real_2op_NaN(st0_ptr, tag, rm, + (flags & REV) ? st0_ptr : &st(rm)); + } else { + int tag; + tag = FPU_gettagi(rm); + if (tag == TAG_Special) + tag = FPU_Special(&st(rm)); + return real_2op_NaN(&st(rm), tag, 0, + (flags & REV) ? st0_ptr : &st(rm)); + } + } else if (taga == TW_Infinity) { + if (tagb == TW_Infinity) { + /* infinity/infinity */ + return arith_invalid(deststnr); + } else { + /* tagb must be Valid or Zero */ + if ((tagb == TW_Denormal) && (denormal_operand() < 0)) + return FPU_Exception; + + /* Infinity divided by Zero or Valid does + not raise and exception, but returns Infinity */ + FPU_copy_to_regi(a, TAG_Special, deststnr); + setsign(dest, sign); + return taga; + } + } else if (tagb == TW_Infinity) { + if ((taga == TW_Denormal) && (denormal_operand() < 0)) + return FPU_Exception; + + /* The result is zero. */ + FPU_copy_to_regi(&CONST_Z, TAG_Zero, deststnr); + setsign(dest, sign); + return TAG_Zero; } - /* Valid/Zero */ - return FPU_divide_by_zero(deststnr, sign); - } - /* Must have infinities, NaNs, etc */ - else if ( (taga == TW_NaN) || (tagb == TW_NaN) ) - { - if ( flags & LOADED ) - return real_2op_NaN((FPU_REG *)rm, flags & 0x0f, 0, st0_ptr); - - if ( flags & DEST_RM ) - { - int tag; - tag = FPU_gettag0(); - if ( tag == TAG_Special ) - tag = FPU_Special(st0_ptr); - return real_2op_NaN(st0_ptr, tag, rm, (flags & REV) ? st0_ptr : &st(rm)); - } - else - { - int tag; - tag = FPU_gettagi(rm); - if ( tag == TAG_Special ) - tag = FPU_Special(&st(rm)); - return real_2op_NaN(&st(rm), tag, 0, (flags & REV) ? st0_ptr : &st(rm)); - } - } - else if (taga == TW_Infinity) - { - if (tagb == TW_Infinity) - { - /* infinity/infinity */ - return arith_invalid(deststnr); - } - else - { - /* tagb must be Valid or Zero */ - if ( (tagb == TW_Denormal) && (denormal_operand() < 0) ) - return FPU_Exception; - - /* Infinity divided by Zero or Valid does - not raise and exception, but returns Infinity */ - FPU_copy_to_regi(a, TAG_Special, deststnr); - setsign(dest, sign); - return taga; - } - } - else if (tagb == TW_Infinity) - { - if ( (taga == TW_Denormal) && (denormal_operand() < 0) ) - return FPU_Exception; - - /* The result is zero. */ - FPU_copy_to_regi(&CONST_Z, TAG_Zero, deststnr); - setsign(dest, sign); - return TAG_Zero; - } #ifdef PARANOID - else - { - EXCEPTION(EX_INTERNAL|0x102); - return FPU_Exception; - } -#endif /* PARANOID */ + else { + EXCEPTION(EX_INTERNAL | 0x102); + return FPU_Exception; + } +#endif /* PARANOID */ return 0; } |