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Author SHA1 Message Date
Richard Henderson 7ba30b1906 s390: Inline and tidy ffi_prep_args 
As per discussion with Ulrich Weigand, document the restrictions
on the code within ffi_call_int as we simultaneously prepare
stack frames for ffi_call_SYSV and the target function.
 2014-12-19 11:38:17 -05:00
Richard Henderson f69ec6f35d s390: Use pc-relative insns in 31-bit mode 
It's silly to stick to esa/390 features when the compiler won't.
Detect when brasl and larl are used by the compiler and then use
them in the assembly.
 2014-12-18 16:21:07 -05:00
Richard Henderson 2f530de168 s390: Reorganize assembly 
Avoid using ffi_prep_args as a callback; do all the work setting
up the frame within ffi_call_int directly.  Save fewer registers
in ffi_closure_SYSV.
 2014-12-18 16:01:59 -05:00
Richard Henderson 97512ded05 s390: Avoid aliasing warnings 2014-12-18 16:01:15 -05:00
Richard Henderson c860ca9ac0 s390: Kill trailing whitespace 2014-12-17 13:24:03 -05:00
Richard Henderson c6352b664c aarch64: Add support for Go closures 2014-11-12 09:29:32 +01:00
Richard Henderson 0e41c73b09 aarch64: Move x8 out of call_context 
Reduces stack size.  It was only used by the closure, and there
are available argument registers.
 2014-11-12 09:29:32 +01:00
Richard Henderson a992f8789b aarch64: Add support for complex types 2014-11-12 09:29:31 +01:00
Richard Henderson 658b2b5600 aarch64: Remove aarch64_flags 
This field was useless from the start, since the normal flags
field is available for backend use.
 2014-11-12 09:28:44 +01:00
Richard Henderson 4a3cbcaa4f aarch64: Unify scalar fp and hfa handling 
Since an HFA of a single element is exactly the same as scalar,
this tidies things up a bit.
 2014-11-12 09:28:44 +01:00
Richard Henderson 12cf89ee04 aarch64: Move return value handling into ffi_closure_SYSV 
As with the change to ffi_call_SYSV, this avoids copying data
into a temporary buffer.
 2014-11-12 09:28:44 +01:00
Richard Henderson 4fe1aea121 aarch64: Move return value handling into ffi_call_SYSV 
This lets us pass return data directly to the caller of ffi_call
in most cases, rather than storing it into temporary storage first.
 2014-11-12 09:28:44 +01:00
Richard Henderson 325471ea6a aarch64: Merge prep_args with ffi_call 
Use the trick to allocate the stack frame for ffi_call_SYSV
within ffi_call itself.
 2014-11-12 09:28:44 +01:00
Richard Henderson 8c8161cb62 aarch64: Tidy up abi manipulation 
Avoid false abstraction, like get_x_addr.  Avoid recomputing data
about the type being manipulated.  Use NEON insns for HFA manipulation.

Note that some of the inline assembly will go away in a subsequent patch.
 2014-11-12 09:28:44 +01:00
Richard Henderson b55e03665d aarch64: Treat void return as not passed in registers 
This lets us do less post-processing when there's no return value.
 2014-11-12 09:28:44 +01:00
Richard Henderson 2e32f9bf6f aarch64: Use correct return registers 
There are fewer return registers than argument registers.
 2014-11-12 09:28:44 +01:00
Richard Henderson 95a04af134 aarch64: Reduce the size of register_context 
We don't need to store 32 general and vector registers.
Only 8 of each are used for parameter passing.
 2014-11-12 09:28:44 +01:00
Richard Henderson 77c4cddca6 aarch64: Simplify AARCH64_STACK_ALIGN 
The iOS abi doesn't require padding between arguments, but
that's not what AARCH64_STACK_ALIGN meant.  The hardware will
in fact trap if the SP register is not 16 byte aligned.
 2014-11-12 09:28:44 +01:00
Richard Henderson b5f147d847 aarch64: Always distinguish LONGDOUBLE 
Avoid if-deffery by forcing FFI_TYPE_LONGDOUBLE different
from FFI_TYPE_DOUBLE.  This will simply be unused on hosts
that define them identically.
 2014-11-12 09:28:44 +01:00
Richard Henderson 38b54b9c18 aarch64: Improve is_hfa 
The set of functions get_homogeneous_type, element_count, and is_hfa
are all intertwined and recompute data.  Return a compound quantity
from is_hfa that contains all the data and avoids the recomputation.
 2014-11-12 09:28:44 +01:00
Richard Henderson 18b74ce54a aarch64: Fix non-apple compilation 2014-11-12 09:28:44 +01:00