alpha: fix conversion from denormal float to double
authorIvan Kokshaysky <ink@jurassic.park.msu.ru>
Thu, 17 Jan 2008 23:21:13 +0000 (15:21 -0800)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Thu, 17 Jan 2008 23:38:59 +0000 (15:38 -0800)
The trap handler does properly update the fraction,
but not the exponent...

Thanks to Paolo Bonzini for the bug report and the testcase.

Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Paolo Bonzini <bonzini@gnu.org>
Cc: Richard Henderson <rth@twiddle.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arch/alpha/math-emu/math.c

index ae79dd970b021ff84ca59d3b5f6b14a4b19ce25f..58c2669a1dd4fa431f32ecbe8416c24a540525ba 100644 (file)
@@ -225,7 +225,7 @@ alpha_fp_emul (unsigned long pc)
                                FP_UNPACK_SP(SB, &vb);
                                DR_c = DB_c;
                                DR_s = DB_s;
-                               DR_e = DB_e;
+                               DR_e = DB_e + (1024 - 128);
                                DR_f = SB_f << (52 - 23);
                                goto pack_d;
                        }