-/* Definitions of target machine for GNU compiler.
- Hitachi H8/300 version generating coff
+/* Definitions of target machine for GNU compiler.
+ Hitachi H8/300 version generating coff
Copyright (C) 1992, 1993, 1994, 1995, 1996, 1996, 1997, 1998, 1999,
2000, 2001, 2002 Free Software Foundation, Inc.
Contributed by Steve Chamberlain (sac@cygnus.com),
/* Define this if addresses of constant functions
shouldn't be put through pseudo regs where they can be cse'd.
Desirable on machines where ordinary constants are expensive
- but a CALL with constant address is cheap.
+ but a CALL with constant address is cheap.
Calls through a register are cheaper than calls to named
functions; however, the register pressure this causes makes
#define BYTES_BIG_ENDIAN 1
/* Define this if most significant word of a multiword number is lowest
- numbered.
+ numbered.
This is true on an H8/300 (actually we can make it up, but we choose to
be consistent). */
#define WORDS_BIG_ENDIAN 1
from 0 to just below FIRST_PSEUDO_REGISTER.
All registers that the compiler knows about must be given numbers,
- even those that are not normally considered general registers.
+ even those that are not normally considered general registers.
Reg 9 does not correspond to any hardware register, but instead
appears in the RTL as an argument pointer prior to reload, and is
The latter must include the registers where values are returned
and the register where structure-value addresses are passed.
Aside from that, you can include as many other registers as you
- like.
+ like.
H8 destroys r0,r1,r2,r3. */
to hold something of mode MODE.
This is ordinarily the length in words of a value of mode MODE
- but can be less for certain modes in special long registers.
+ but can be less for certain modes in special long registers.
We pretend the MAC register is 32bits -- we don't have any data
types on the H8 series to handle more than 32bits. */
#define INDEX_REG_CLASS NO_REGS
#define BASE_REG_CLASS GENERAL_REGS
-/* Get reg_class from a letter such as appears in the machine description.
+/* Get reg_class from a letter such as appears in the machine description.
'a' is the MAC register. */
0)
/* Similar, but for floating constants, and defining letters G and H.
- Here VALUE is the CONST_DOUBLE rtx itself.
-
+ Here VALUE is the CONST_DOUBLE rtx itself.
+
`G' is a floating-point zero. */
#define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
#define CLASS_MAX_NREGS(CLASS, MODE) \
((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
-/* Any SI register-to-register move may need to be reloaded,
+/* Any SI register-to-register move may need to be reloaded,
so define REGISTER_MOVE_COST to be > 2 so that reload never
shortcuts. */
/* Define how to find the value returned by a function.
VALTYPE is the data type of the value (as a tree).
If the precise function being called is known, FUNC is its FUNCTION_DECL;
- otherwise, FUNC is 0.
-
+ otherwise, FUNC is 0.
+
On the H8 the return value is in R0/R1. */
#define FUNCTION_VALUE(VALTYPE, FUNC) \
#define EXIT_IGNORE_STACK 0
/* Output assembler code for a block containing the constant parts
- of a trampoline, leaving space for the variable parts.
+ of a trampoline, leaving space for the variable parts.
H8/300
vvvv context
The other macros defined here are used only in GO_IF_LEGITIMATE_ADDRESS,
except for CONSTANT_ADDRESS_P which is actually
- machine-independent.
+ machine-independent.
On the H8/300, a legitimate address has the form
REG, REG+CONSTANT_ADDRESS or CONSTANT_ADDRESS. */
GO_IF_LEGITIMATE_ADDRESS.
It is always safe for this macro to do nothing. It exists to recognize
- opportunities to optimize the output.
+ opportunities to optimize the output.
For the H8/300, don't do anything. */
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