diff options
| author | Richard Sandiford <richard@codesourcery.com> | 2006-08-14 17:08:34 +0000 |
|---|---|---|
| committer | Richard Sandiford <richard@codesourcery.com> | 2006-08-14 17:08:34 +0000 |
| commit | d19110c4a7c69de61e9aafa8d8fd9ca3e34089c8 (patch) | |
| tree | ec4d64fc282d5402799b58f8710c086c876a95ea | |
| parent | 487cb5e0cdbb02e1b4a9b1cda26b21f7cbb8322f (diff) | |
gcc/
* config/m68k/m68k.c (notice_update_cc): If an SFmode move is
implemented using move.l, do not use its cc result for floating-point
comparisons.
git-svn-id: https://gcc.gnu.org/svn/gcc/branches/csl/sourcerygxx-4_1@116130 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | ChangeLog.csl | 7 | ||||
| -rw-r--r-- | gcc/config/m68k/m68k.c | 10 |
2 files changed, 15 insertions, 2 deletions
diff --git a/ChangeLog.csl b/ChangeLog.csl index caf113042a3..143f24fe55f 100644 --- a/ChangeLog.csl +++ b/ChangeLog.csl @@ -1,3 +1,10 @@ +2006-08-14 Richard Sandiford <richard@codesourcery.com> + + gcc/ + * config/m68k/m68k.c (notice_update_cc): If an SFmode move is + implemented using move.l, do not use its cc result for floating-point + comparisons. + 2006-08-09 Paul Brook <paul@codesourcery.com> gcc/ diff --git a/gcc/config/m68k/m68k.c b/gcc/config/m68k/m68k.c index d35a2faf262..3dfd61989e7 100644 --- a/gcc/config/m68k/m68k.c +++ b/gcc/config/m68k/m68k.c @@ -3103,12 +3103,18 @@ notice_update_cc (rtx exp, rtx insn) if (cc_status.value2 && modified_in_p (cc_status.value2, insn)) cc_status.value2 = 0; } + /* fmoves to memory or data registers do not set the condition + codes. Normal moves _do_ set the condition codes, but not in + a way that is appropriate for comparison with 0, because -0.0 + would be treated as a negative nonzero number. Note that it + isn't appropriate to conditionalize this restiction on + HONOR_SIGNED_ZEROS because that macro merely indicates whether + we care about the difference between -0.0 and +0.0. */ else if (!FP_REG_P (SET_DEST (exp)) && SET_DEST (exp) != cc0_rtx && (FP_REG_P (SET_SRC (exp)) || GET_CODE (SET_SRC (exp)) == FIX - || GET_CODE (SET_SRC (exp)) == FLOAT_TRUNCATE - || GET_CODE (SET_SRC (exp)) == FLOAT_EXTEND)) + || FLOAT_MODE_P (GET_MODE (SET_DEST (exp))))) { CC_STATUS_INIT; } |