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(SETUP_FRAME_ADDRESS, DYNAMIC_CHAIN_ADDRESS, 

RETURN_ADDR_IN_PREVIOUS_FRAME, RETURN_ADDR_RTX): Define.

From-SVN: r3608
This commit is contained in:
Jim Wilson 1993-03-02 13:09:17 -08:00
parent 4893584c6c
commit 953fe17998
1 changed files with 27 additions and 0 deletions
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27
gcc/config/sparc/sparc.h
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@ -1048,6 +1048,33 @@ extern union tree_node *current_function_decl;
ARGLIST is the argument list; see expr.c. */
extern struct rtx_def *sparc_builtin_saveregs ();
#define EXPAND_BUILTIN_SAVEREGS(ARGLIST) sparc_builtin_saveregs (ARGLIST)
/* Generate RTL to flush the register windows so as to make arbitrary frames
available. */
#define SETUP_FRAME_ADDRESSES() \
emit_insn (gen_flush_register_windows ())
/* Given an rtx for the address of a frame,
return an rtx for the address of the word in the frame
that holds the dynamic chain--the previous frame's address. */
#define DYNAMIC_CHAIN_ADDRESS(frame) \
gen_rtx (PLUS, Pmode, frame, gen_rtx (CONST_INT, VOIDmode, 56))
/* The return address isn't on the stack, it is in a register, so we can't
access it from the current frame pointer. We can access it from the
previous frame pointer though by reading a value from the register window
save area. */
#define RETURN_ADDR_IN_PREVIOUS_FRAME
/* The current return address is in %i7. The return address of anything
farther back is in the register window save area at [%fp+60]. */
/* ??? This ignores the fact that the actual return address is +8 for normal
returns, and +12 for structure returns. */
#define RETURN_ADDR_RTX(count, frame) \
((count == -1) \
? gen_rtx (REG, Pmode, 31) \
: copy_to_reg (gen_rtx (MEM, Pmode, \
memory_address (Pmode, plus_constant (frame, 60)))))
/* Addressing modes, and classification of registers for them. */