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| author | m.hayes <m.hayes@138bc75d-0d04-0410-961f-82ee72b054a4> | 2001-01-05 04:09:02 +0000 |
|---|---|---|
| committer | m.hayes <m.hayes@138bc75d-0d04-0410-961f-82ee72b054a4> | 2001-01-05 04:09:02 +0000 |
| commit | c85601868d9ef12d39a8dbd8d57735af592a7293 (patch) | |
| tree | df5ec5d0fffb94a39b2304b56fa43f334259b69a | |
| parent | ec5a6a405257c944c2e3e85525dd4ec222a04a55 (diff) | |
| download | gcc-c85601868d9ef12d39a8dbd8d57735af592a7293.tar.gz | |
* config/c4x/c4x.c (c4x_expand_prologue): Don't compile an ISR
with more than 32767 words of local storage.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@38703 138bc75d-0d04-0410-961f-82ee72b054a4
| -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 a710137906b..fd4905ae632 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 230b54cf0d2..496da47ada2 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), |