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| author | Bob Wilson <bob.wilson@acm.org> | 2002-06-28 17:24:34 +0000 |
|---|---|---|
| committer | Bob Wilson <bwilson@gcc.gnu.org> | 2002-06-28 17:24:34 +0000 |
| commit | 5f9dc2143bf260b6436c3582dd50dbbecbc71d45 (patch) | |
| tree | 61923837ad29c60d2b4a3daff4ae818cc7d42642 | |
| parent | 53501a19fa31272638948d247ad7988afa69d3a4 (diff) | |
| download | gcc-5f9dc2143bf260b6436c3582dd50dbbecbc71d45.zip gcc-5f9dc2143bf260b6436c3582dd50dbbecbc71d45.tar.gz gcc-5f9dc2143bf260b6436c3582dd50dbbecbc71d45.tar.bz2 | |
* config/xtensa/xtensa.h (RETURN_IN_MEMORY): Update comment.
From-SVN: r55066
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/config/xtensa/xtensa.h | 14 |
2 files changed, 11 insertions, 7 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 0b8c5a7..1a0445d 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +2002-06-28 Bob Wilson <bob.wilson@acm.org> + + * config/xtensa/xtensa.h (RETURN_IN_MEMORY): Update comment. + 2001-06-08 Bernd Schmidt <bernds@redhat.com> * emit-rtl.c (gen_lowpart_common): Don't create paradoxical FLOAT_MODE diff --git a/gcc/config/xtensa/xtensa.h b/gcc/config/xtensa/xtensa.h index 22fcb79..836bd8d 100644 --- a/gcc/config/xtensa/xtensa.h +++ b/gcc/config/xtensa/xtensa.h @@ -796,13 +796,13 @@ extern enum reg_class xtensa_char_to_class[256]; /* Don't worry about compatibility with PCC. */ #define DEFAULT_PCC_STRUCT_RETURN 0 -/* For Xtensa, we would like to be able to return up to 6 words in - memory but GCC cannot support that. The return value must be given - one of the standard MODE_INT modes, and there is no 6 word mode. - Instead, if we try to return a 6 word structure, GCC selects the - next biggest mode (OImode, 8 words) and then the register allocator - fails because there is no 8-register group beginning with a10. So - we have to fall back on the next largest size which is 4 words... */ +/* For Xtensa, up to 4 words can be returned in registers. (It would + have been nice to allow up to 6 words in registers but GCC cannot + support that. The return value must be given one of the standard + MODE_INT modes, and there is no 6 word mode. Instead, if we try to + return a 6 word structure, GCC selects the next biggest mode + (OImode, 8 words) and then the register allocator fails because + there is no 8-register group beginning with a10.) */ #define RETURN_IN_MEMORY(TYPE) \ ((unsigned HOST_WIDE_INT) int_size_in_bytes (TYPE) > 4 * UNITS_PER_WORD) |