diff options
| author | Mihail Ionescu <mihail.ionescu@arm.com> | 2019-11-12 13:53:06 +0000 |
|---|---|---|
| committer | Kyrylo Tkachov <kyrylo.tkachov@arm.com> | 2019-11-12 14:00:34 +0000 |
| commit | f439988037a589de3798f44e7268301adaec21a9 (patch) | |
| tree | 10e4a7636ea4a4abe9791aeeddd50d15c4823e6f /gas/config | |
| parent | 51c8edf68bf1e16c6d05fbb31a36e0cc436a9750 (diff) | |
| download | gdb-f439988037a589de3798f44e7268301adaec21a9.zip gdb-f439988037a589de3798f44e7268301adaec21a9.tar.gz gdb-f439988037a589de3798f44e7268301adaec21a9.tar.bz2 | |
[gas][arm] Make .fpu reset the FPU/Coprocessor feature bits
This patch is fixes the '.fpu' behaviour.
Currently, using '.fpu' resets the previously selected '.fpu' options (by overwriting them),
but does not reset previous FPU options selected by other means (ie. when using
'.arch_extension fp' in conjunction with '.fpu <x>', the FPU is not reset).
Example:
.arch armv8-a @ SET BASE
.arch_extension fp @ ADD FP-ARMV8
.fpu vfpv2 @ ADD (already existing bits, does not reset)
vfms.f32 s0, s1, s2 @ OK
.arch armv8-a @ RESET
.fpu fp-armv8 @ ADD FP-ARMV8
vfms.f32 s0, s1, s2 @ OK
.fpu vfpv2 @ RESET to VFPV2
vfms.f32 s0, s1, s2 @ ERROR
After the patch this becomes:
.arch armv8-a @ SET BASE
.arch_extension fp @ ADD FP-ARMV8
.fpu vfpv2 @ RESET TO VFPV2
vfms.f32 s0, s1, s2 @ ERROR
.arch armv8-a @ RESET
.fpu fp-armv8 @ ADD FP-ARMV8
vfms.f32 s0, s1, s2 @ OK
.fpu vfpv2 @ RESET to VFPV2
vfms.f32 s0, s1, s2 @ ERROR
gas/ChangeLog:
2019-11-11 Mihail Ionescu <mihail.ionescu@arm.com>
* config/tc-arm.c (s_arm_fpu): Clear selected_cpu fpu bits.
(fpu_any): Remove OBJ_ELF guards.
* gas/testsuite/gas/arm/fpu-rst.s: New.
* gas/testsuite/gas/arm/fpu-rst.d: New.
* gas/testsuite/gas/arm/fpu-rst.l: New.
Diffstat (limited to 'gas/config')
| -rw-r--r-- | gas/config/tc-arm.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/gas/config/tc-arm.c b/gas/config/tc-arm.c index 2a884b1..167d039 100644 --- a/gas/config/tc-arm.c +++ b/gas/config/tc-arm.c @@ -281,9 +281,7 @@ static const arm_feature_set arm_ext_i8mm = ARM_FEATURE_CORE_HIGH (ARM_EXT2_I8MM); static const arm_feature_set arm_arch_any = ARM_ANY; -#ifdef OBJ_ELF static const arm_feature_set fpu_any = FPU_ANY; -#endif static const arm_feature_set arm_arch_full ATTRIBUTE_UNUSED = ARM_FEATURE (-1, -1, -1); static const arm_feature_set arm_arch_t2 = ARM_ARCH_THUMB2; static const arm_feature_set arm_arch_none = ARM_ARCH_NONE; @@ -32775,6 +32773,7 @@ s_arm_fpu (int ignored ATTRIBUTE_UNUSED) if (streq (opt->name, name)) { selected_fpu = opt->value; + ARM_CLEAR_FEATURE (selected_cpu, selected_cpu, fpu_any); #ifndef CPU_DEFAULT if (no_cpu_selected ()) ARM_MERGE_FEATURE_SETS (cpu_variant, arm_arch_any, selected_fpu); |