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[PATCH] alpha: fix conversion from denormal float to double

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From: Ivan Kokshaysky <ink@...>
To: Andrew Morton <akpm@...>
Cc: Richard Henderson <rth@...>, <linux-kernel@...>
Subject: [PATCH] alpha: fix conversion from denormal float to double
Date: Wednesday, January 16, 2008 - 5:11 am

The trap handler does properly update the fraction,
but not the exponent...

Thanks to Paolo Bonzini <bonzini@gnu.org> for the bug report
and the testcase.

Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
---
 arch/alpha/math-emu/math.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/alpha/math-emu/math.c b/arch/alpha/math-emu/math.c
index ae79dd9..58c2669 100644
--- a/arch/alpha/math-emu/math.c
+++ b/arch/alpha/math-emu/math.c
@@ -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;
 			}
--
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[PATCH] alpha: fix conversion from denormal float to double, Ivan Kokshaysky, (Wed Jan 16, 5:11 am)