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| author | Michael Hayes <m.hayes@elec.canterbury.ac.nz> | 2001-01-05 04:09:02 +0000 |
|---|---|---|
| committer | Michael Hayes <m.hayes@gcc.gnu.org> | 2001-01-05 04:09:02 +0000 |
| commit | 69f6e760a80eef94fa88119e4f2ac4c63353dc78 (patch) | |
| tree | df5ec5d0fffb94a39b2304b56fa43f334259b69a /gcc | |
| parent | 06dd70c652a8ca50e09037918bf4ef804ac1d601 (diff) | |
| download | gcc-69f6e760a80eef94fa88119e4f2ac4c63353dc78.zip gcc-69f6e760a80eef94fa88119e4f2ac4c63353dc78.tar.gz gcc-69f6e760a80eef94fa88119e4f2ac4c63353dc78.tar.bz2 | |
c4x.c (c4x_expand_prologue): Don't compile an ISR with more than 32767 words of local storage.
* config/c4x/c4x.c (c4x_expand_prologue): Don't compile an ISR
with more than 32767 words of local storage.
From-SVN: r38703
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/c4x/c4x.c | 11 |
2 files changed, 13 insertions, 3 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index a710137..fd4905a 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,10 @@ 2001-01-05 Michael Hayes <m.hayes@elec.canterbury.ac.nz> + * config/c4x/c4x.c (c4x_expand_prologue): Don't compile an ISR + with more than 32767 words of local storage. + +2001-01-05 Michael Hayes <m.hayes@elec.canterbury.ac.nz> + * config/c4x/c4x.c (c4x_init_builtins): Remove builtin support for 'abs', 'labs', and 'fabs'. (c4x_expand_builtin): Likewise. diff --git a/gcc/config/c4x/c4x.c b/gcc/config/c4x/c4x.c index 230b54c..496da47 100644 --- a/gcc/config/c4x/c4x.c +++ b/gcc/config/c4x/c4x.c @@ -826,10 +826,15 @@ c4x_expand_prologue () insn = emit_insn (gen_movqi (gen_rtx_REG (QImode, AR3_REGNO), gen_rtx_REG (QImode, SP_REGNO))); RTX_FRAME_RELATED_P (insn) = 1; - /* FIXME: Assume ISR doesn't require more than 32767 words - of local variables. */ + /* We require that an ISR uses fewer than 32768 words of + local variables, otherwise we have to go to lots of + effort to save a register, load it with the desired size, + adjust the stack pointer, and then restore the modified + register. Frankly, I think it is a poor ISR that + requires more than 32767 words of local temporary + storage! */ if (size > 32767) - error ("ISR %s requires %d words of local vars, max is 32767.", + fatal ("ISR %s requires %d words of local vars, max is 32767.", current_function_name, size); insn = emit_insn (gen_addqi3 (gen_rtx_REG (QImode, SP_REGNO), gen_rtx_REG (QImode, SP_REGNO), |