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[patch] h8300.c: Use r7/er7 instead of sp.
- From: Kazu Hirata <kazu at cs dot umass dot edu>
- To: gcc-patches at gcc dot gnu dot org
- Date: Mon, 02 Dec 2002 11:54:05 -0500 (EST)
- Subject: [patch] h8300.c: Use r7/er7 instead of sp.
Hi,
Attached is a patch to make the h8 port use r7/er7 instead of sp in
code generation.
The reason for the change is that sp will not be used when we switch
from TARGET_ASM_FUNCTION_PROLOGUE/EPILOGUE to the RTL-based
prologue/epilogue. By switching to r7/er7, the comparison of the
TARGET_ASM_FUNCTION_PROLOGUE/EPILOGUE-based code and the RTL-based
code will be easier.
Tested on h8300 port. Committed.
Kazu Hirata
2002-12-02 Kazu Hirata <kazu@cs.umass.edu>
* config/h8300/h8300.c (dosize): Output r7/er7 instead of sp.
(push): Likewise.
(pop): Likewise.
(h8300_output_function_prologue): Likewise.
(h8300_output_function_epilogue): Likewise.
Index: h8300.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/config/h8300/h8300.c,v
retrieving revision 1.168
diff -u -p -r1.168 h8300.c
--- h8300.c 2 Dec 2002 02:02:43 -0000 1.168
+++ h8300.c 2 Dec 2002 16:50:17 -0000
@@ -418,16 +418,20 @@ dosize (file, op, size)
amount > 0;
amount /= 2)
{
+ char insn[100];
+
+ sprintf (insn, "\t%ss\t#%d,%s\n", op, amount,
+ TARGET_H8300 ? "r7" : "er7");
for (; size >= amount; size -= amount)
- fprintf (file, "\t%ss\t#%d,sp\n", op, amount);
+ fputs (insn, file);
}
}
else
{
if (TARGET_H8300)
- fprintf (file, "\tmov.w\t#%d,r3\n\t%s.w\tr3,sp\n", size, op);
+ fprintf (file, "\tmov.w\t#%d,r3\n\t%s.w\tr3,r7\n", size, op);
else
- fprintf (file, "\t%s.l\t#%d,sp\n", op, size);
+ fprintf (file, "\t%s.l\t#%d,er7\n", op, size);
}
}
@@ -471,7 +475,10 @@ push (file, rn)
FILE *file;
int rn;
{
- fprintf (file, "\t%s\t%s\n", h8_push_op, h8_reg_names[rn]);
+ if (TARGET_H8300)
+ fprintf (file, "\t%s\t%s,@-r7\n", h8_mov_op, h8_reg_names[rn]);
+ else
+ fprintf (file, "\t%s\t%s,@-er7\n", h8_mov_op, h8_reg_names[rn]);
}
/* Output assembly language code to pop register RN. */
@@ -481,7 +488,10 @@ pop (file, rn)
FILE *file;
int rn;
{
- fprintf (file, "\t%s\t%s\n", h8_pop_op, h8_reg_names[rn]);
+ if (TARGET_H8300)
+ fprintf (file, "\t%s\t@r7+,%s\n", h8_mov_op, h8_reg_names[rn]);
+ else
+ fprintf (file, "\t%s\t@er7+,%s\n", h8_mov_op, h8_reg_names[rn]);
}
/* This is what the stack looks like after the prolog of
@@ -604,7 +614,7 @@ h8300_output_function_prologue (file, si
if (n_regs == 1)
push (file, regno);
else
- fprintf (file, "\tstm.l\t%s-%s,@-sp\n",
+ fprintf (file, "\tstm.l\t%s-%s,@-er7\n",
h8_reg_names[regno],
h8_reg_names[regno + (n_regs - 1)]);
}
@@ -670,7 +680,7 @@ h8300_output_function_epilogue (file, si
if (n_regs == 1)
pop (file, regno);
else
- fprintf (file, "\tldm.l\t@sp+,%s-%s\n",
+ fprintf (file, "\tldm.l\t@er7+,%s-%s\n",
h8_reg_names[regno - (n_regs - 1)],
h8_reg_names[regno]);
}