Commit Graph

17 Commits

Author SHA1 Message Date
Richard Henderson 57a808b6d7 target-alpha: Raise IOV from CVTQL
Even if an exception isn't taken, the status flags need updating
and the result should be written to the destination.  Move the body
of cvtql out of line, since we now always need a call.

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Richard Henderson <rth@twiddle.net>
2015-05-18 13:03:47 -07:00
Richard Henderson 4ed069ab53 target-alpha: Suppress underflow from CVTTQ if DNZ
I.e. respect flush_inputs_to_zero.

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Richard Henderson <rth@twiddle.net>
2015-05-18 13:03:47 -07:00
Richard Henderson b99e80694c target-alpha: Raise EXC_M_INV properly for fp inputs
Ignore DNZ if software completion isn't used.  Raise INV for
denormals in system mode so the OS completion handler sees them.

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Richard Henderson <rth@twiddle.net>
2015-05-18 13:03:47 -07:00
Richard Henderson 7b4dde839e target-alpha: Fix cvttq vs inf
We should raise INV for infinities as well, not OVR+INE.

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Richard Henderson <rth@twiddle.net>
2015-05-18 13:03:46 -07:00
Richard Henderson 7f2e40020c target-alpha: Fix cvttq vs large integers
The range +- 2**63 - 2**64 was returning the wrong truncated
result.  We also incorrectly signaled overflow for -2**63.

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Richard Henderson <rth@twiddle.net>
2015-05-18 13:03:46 -07:00
Richard Henderson c24a8a0b6d target-alpha: Raise IOV from CVTTQ
Floating-point overflow is a different bit from integer overflow.

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Richard Henderson <rth@twiddle.net>
2015-05-18 13:03:46 -07:00
Richard Henderson f6b6b7b8a7 target-alpha: Set EXC_M_SWC for exceptions from /S insns
Previously forgotten, the kernel needs the software completion bit to
know that it needs to emulate software completion qualified insns.

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Richard Henderson <rth@twiddle.net>
2015-05-18 13:03:46 -07:00
Richard Henderson 471d493047 target-alpha: Set fpcr_exc_status even for disabled exceptions
The qualifiers can suppress the raising of exceptions, but real
hardware still records that the exceptions occurred.

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Richard Henderson <rth@twiddle.net>
2015-05-18 13:03:46 -07:00
Richard Henderson f3d3aad4a9 target-alpha: Tidy FPCR representation
Store the fpcr as the hardware represents it.  Convert the softfpu
representation of exceptions into the fpcr representation.

Signed-off-by: Richard Henderson <rth@twiddle.net>
2015-05-18 13:03:46 -07:00
Richard Henderson 3da653fa05 target-alpha: Rename floating-point subroutines
... to match the instructions, which have no leading "f".

Signed-off-by: Richard Henderson <rth@twiddle.net>
2015-05-18 13:03:46 -07:00
Richard Henderson 9354452c39 target-alpha: Move VAX helpers to a new file
Keep the IEEE and VAX floating point emulation separate.

Signed-off-by: Richard Henderson <rth@twiddle.net>
2015-05-18 13:03:46 -07:00
Richard Henderson 2ef6175aa7 tcg: Invert the inclusion of helper.h
Rather than include helper.h with N values of GEN_HELPER, include a
secondary file that sets up the macros to include helper.h.  This
minimizes the files that must be rebuilt when changing the macros
for file N.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-28 09:33:54 -07:00
Richard Henderson e8d8fef48f target-alpha: Convert gen_fcvtlq/ql to source/sink
Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-04-17 11:47:42 -07:00
Paolo Bonzini 6b4c305cbd fpu: move public header file to include/fpu
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19 08:32:46 +01:00
Blue Swirl 2050396801 Use uintptr_t for various op related functions
Use uintptr_t instead of void * or unsigned long in
several op related functions, env->mem_io_pc and
GETPC() macro.

Reviewed-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-04-14 14:23:37 +00:00
Richard Henderson 743434099d target-alpha: Make use of fp_status.flush_inputs_to_zero.
This softfp feature post-dates the last major update to the Alpha
fpu translation.  We can make use of this to eliminate at least
one helper function that was performing this operation by hand.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-03-24 17:07:58 +00:00
Richard Henderson 4a58aedff4 target-alpha: Move floating-point helpers to fpu_helper.c.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-03-24 17:07:27 +00:00