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tcg-target.c 66.8 kB
tcg-target.h 4.4 kB

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# Date Author Comment
17b91491 10/28/2012 03:54 pm Aurelien Jarno

tcg/i386: remove ld/st third argument register constraint

On x86_64, remove the constraint on the third argument register which
is not needed:
- For loads the helper arguments are env, addr, mem_idx. The addr
value should not be in the two first argument registers as they are...
166792f7 10/28/2012 03:54 pm Aurelien Jarno

tcg/i386: remove suboptimal register shifting

Now that CONFIG_TCG_PASS_AREG0 has been removed, it's easier to get
an optimal code for the load/store functions.

First swap the two registers used in tcg_out_tlb_load() so that the
address end-up in the second register instead of the first one. Adjust...
07e10e5d 10/12/2012 02:27 pm Peter Maydell

tcg: Remove TCG_TARGET_HAS_GUEST_BASE define

GUEST_BASE support is now supported by all TCG backends, and is
now mandatory. Drop the now-pointless TCG_TARGET_HAS_GUEST_BASE
define (set by every backend) and the error if it is unset.

Signed-off-by: Peter Maydell <>...
0aed257f 10/06/2012 07:48 pm Richard Henderson

tcg: Add TCG_COND_NEVER, TCG_COND_ALWAYS

There are several cases that can be handled easier inside both
translators and code generators if we have out-of-band values
for conditions. It's easy enough to handle ALWAYS and NEVER in
the natural way inside the tcg middle-end....
626cd050 10/06/2012 07:47 pm Aurelien Jarno

tcg: remove obsolete jmp op

The TCG jmp operation doesn't really make sense in the QEMU context, it
is unused, it is not implemented by some targets, and it is wrongly
implemented by some others.

This patch simply removes it.

Reviewed-by: Richard Henderson <>...
f813cb83 09/26/2012 01:31 am Aurelien Jarno

tcg/i386: fix build with -march < i686

The movcond_i32 op has to be protected with TCG_TARGET_HAS_movcond_i32
to fix the build with -march < i686.

Thanks to Richard Henderson for the hint.

Reported-by: Alex Barcelo <>
Signed-off-by: Aurelien Jarno <>
b18212c6 09/22/2012 05:52 pm Stefan Weil

tcg/i386: Add shortcuts for registers used in L constraint

While 64 bit hosts use the first three registers which are also used
as function input parameters, 32 bit hosts use TCG_REG_EAX and
TCG_REG_EDX which are not used in parameter passing.

After defining new register macros for the registers used in L...
d73685e3 09/22/2012 05:52 pm Stefan Weil

tcg/i386: Remove unused registers from tcg_target_call_iarg_regs

32 bit x86 hosts don't need registers for helper function arguments
because they use the default stack based calling convention.

Removing the registers allows simpler code for function
tcg_target_get_call_iarg_regs_count....
6e17d0c5 09/22/2012 05:52 pm Stefan Weil

tcg: Remove tcg_target_get_call_iarg_regs_count

The TCG targets no longer need individual implementations.

Since commit 6a18ae2d2947532d5c26439548afa0481c4529f9,
'flags' is no longer used in tcg_target_get_call_iarg_regs_count.

The remaining tcg_target_get_call_iarg_regs_count is trivial and only...
1b7621ad 09/22/2012 04:10 pm Stefan Weil

w64: Fix TCG helper functions with 5 arguments

TCG uses 6 registers for function arguments on 64 bit Linux hosts,
but only 4 registers on W64 hosts.

Commit 2999a0b20074a7e4a58f56572bb1436749368f59 increased the number
of arguments for some important helper functions from 4 to 5...

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