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[PATCH] c4x HARD_REGNO_MODE_OK
- To: Michael Hayes <m dot hayes at elec dot canterbury dot ac dot nz>
- Subject: [PATCH] c4x HARD_REGNO_MODE_OK
- From: Jakub Jelinek <jakub at redhat dot com>
- Date: Thu, 16 Dec 1999 10:56:53 +0100
- Cc: gcc-patches at gcc dot gnu dot org
- References: <14424.34036.923615.893356@ongaonga.elec.canterbury.ac.nz>
While building c4x cross, I realized c4x handles SImode but does not accept
it in HARD_REGNO_MODE_OK. This breaks e.g. the SUBREG_BYTE stuff because it
aborts immediately when you use SImode.
1999-12-16 Jakub Jelinek <jakub@redhat.com>
* config/c4x/c4x.c (c4x_hard_regno_mode_ok): Accept SImode.
--- gcc/config/c4x/c4x.c.jj Sun Nov 14 21:43:34 1999
+++ gcc/config/c4x/c4x.c Thu Dec 16 10:03:45 1999
@@ -350,6 +350,16 @@ c4x_hard_regno_mode_ok (regno, mode)
&& IS_INT_REG (regno + 1)
&& (regno & 1) == 0;
+ case SImode: /* Very Long Long (128 bits) */
+ /* We need four registers to store SImode. Note that
+ it is much easier to constrain the first register
+ to start on an even boundary. */
+ return IS_INT_REG (regno)
+ && IS_INT_REG (regno + 1)
+ && IS_INT_REG (regno + 2)
+ && IS_INT_REG (regno + 3)
+ && (regno & 3) == 0;
+
default:
return 0; /* We don't support these modes */
}
Cheers,
Jakub
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Jakub Jelinek | jakub@redhat.com | http://sunsite.mff.cuni.cz/~jj
Linux version 2.3.26 on a sparc64 machine (1343.49 BogoMips)
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