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+2003-06-30 Jim Blandy <jimb@redhat.com>
+
+ Patch from IBM (authors unspecified, probably Ulrich Weigand and
+ Gerhard Tonn) for argument passing on the S/390 and S/390x:
+ * s390-tdep.c (S390_STACK_FRAME_OVERHEAD): This is always space
+ for 16 registers, and then 32 more bytes.
+ (S390_STACK_PARAMETER_ALIGNMENT, S390_NUM_FP_PARAMETER_REGISTERS):
+ New macros.
+ (is_double_arg): The s390x doesn't handle DOUBLE_ARGS specially.
+ Move up in the file, since it's now used by is_simple_arg.
+ (is_simple_arg): Don't assume registers are four bytes long.
+ Exclude all double arguments. Extended floats are not simple
+ args.
+ (is_power_of_two): New function.
+ (pass_by_copy_ref): Call is_power_of_two, and check that the
+ length fits in a register, rather than listing all the acceptable
+ sizes. Extended floats are not passed by reference.
+ (s390_push_arguments): Don't assume registers are four bytes long.
+ Reserve an argument register to point to the buffer for structures
+ returned by value. Use S390_NUM_FP_PARAMETER_REGISTERS and
+ S390_STACK_FRAME_OVERHEAD.
+
2003-06-30 Andreas Schwab <schwab@suse.de>
* utils.c (internal_vproblem): Use xvasprintf, not xasprintf, to