diff options
| author | Kyrylo Tkachov <kyrylo.tkachov@arm.com> | 2014-02-25 10:25:26 +0000 |
|---|---|---|
| committer | Kyrylo Tkachov <kyrylo.tkachov@arm.com> | 2014-02-25 10:25:26 +0000 |
| commit | 04895256044daf6a719d0cb0b631661ebf3b80e2 (patch) | |
| tree | 94f99557e87bd4a21614d0d367d7d2cb02a5d26b | |
| parent | e1d5d0949c8c48366855a9f2099c5ccce59c4fe4 (diff) | |
PR target/55426
* config/arm/arm.h (CANNOT_CHANGE_MODE_CLASS): Allow 128 to 64-bit
conversions.
git-svn-id: https://gcc.gnu.org/svn/gcc/branches/gcc-4_8-branch@208117 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/arm/arm.h | 14 |
2 files changed, 15 insertions, 5 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 4f80188d8c6..188455bdd07 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2014-02-25 Kyrylo Tkachov <kyrylo.tkachov@arm.com> + + PR target/55426 + * config/arm/arm.h (CANNOT_CHANGE_MODE_CLASS): Allow 128 to 64-bit + conversions. + 2014-02-24 John David Anglin <danglin@gcc.gnu.org> * config/pa/pa.c (pa_output_move_double): Don't valididate when diff --git a/gcc/config/arm/arm.h b/gcc/config/arm/arm.h index 05aea3577d7..14340ebad63 100644 --- a/gcc/config/arm/arm.h +++ b/gcc/config/arm/arm.h @@ -1213,11 +1213,15 @@ enum reg_class VFPv2. In big-endian mode, modes greater than word size (i.e. DFmode) are stored in VFP registers in little-endian order. We can't describe that accurately to - GCC, so avoid taking subregs of such values. */ -#define CANNOT_CHANGE_MODE_CLASS(FROM, TO, CLASS) \ - (TARGET_VFP && TARGET_BIG_END \ - && (GET_MODE_SIZE (FROM) > UNITS_PER_WORD \ - || GET_MODE_SIZE (TO) > UNITS_PER_WORD) \ + GCC, so avoid taking subregs of such values. + The only exception is going from a 128-bit to a 64-bit type. In that case + the data layout happens to be consistent for big-endian, so we explicitly allow + that case. */ +#define CANNOT_CHANGE_MODE_CLASS(FROM, TO, CLASS) \ + (TARGET_VFP && TARGET_BIG_END \ + && !(GET_MODE_SIZE (FROM) == 16 && GET_MODE_SIZE (TO) == 8) \ + && (GET_MODE_SIZE (FROM) > UNITS_PER_WORD \ + || GET_MODE_SIZE (TO) > UNITS_PER_WORD) \ && reg_classes_intersect_p (VFP_REGS, (CLASS))) /* The class value for index registers, and the one for base regs. */ |