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Consolidate Thumb-1/Thumb-2 ISA detection

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2015-12-24  Thomas Preud'homme  <thomas.preudhomme@arm.com>

gas/
    * config/tc-arm.c (move_or_literal_pool): Check mov.w, mvm and movw
    availability against arm_ext_v6t2 instead of checking arm_arch_t2,
    fixing comments along the way.
    (handle_it_state): Check arm_ext_v6t2 instead of arm_arch_t2 to
    generate IT instruction.
    (t1_isa_t32_only_insn): New function.
    (md_assemble): Use above new function to check for invalid wide
    instruction for CPU Thumb ISA and to determine what Thumb extension
    bit is necessary for that instruction.
    (md_apply_fix): Use arm_ext_v6t2 instead of arm_arch_t2 to decide if
    branch is out of range.

include/opcode/
    * arm.h (ARM_ARCH_THUMB2): Add comment explaining its meaning and
    remove extension bit not including any Thumb-2 instruction.
This commit is contained in:
Thomas Preud'homme
2015-12-24 17:01:42 +08:00
parent 443bfd5a37
commit fc289b0a83
4 changed files with 68 additions and 33 deletions
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6
include/opcode/arm.h
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@ -263,10 +263,10 @@
#define ARM_ANY ARM_FEATURE (-1, -1, 0) /* Any basic core. */
#define ARM_FEATURE_ALL ARM_FEATURE (-1, -1, -1)/* All CPU and FPU features. */
#define FPU_ANY_HARD ARM_FEATURE_COPROC (FPU_FPA | FPU_VFP_HARD | FPU_MAVERICK)
/* Extensions containing some Thumb-2 instructions. If any is present, Thumb
ISA is Thumb-2. */
#define ARM_ARCH_THUMB2 ARM_FEATURE_CORE_LOW (ARM_EXT_V6T2 | ARM_EXT_V7 \
| ARM_EXT_V7A | ARM_EXT_V7R \
| ARM_EXT_V7M | ARM_EXT_DIV \
| ARM_EXT_V8)
| ARM_EXT_DIV | ARM_EXT_V8)
/* v7-a+sec. */
#define ARM_ARCH_V7A_SEC ARM_FEATURE_CORE_LOW (ARM_AEXT_V7A | ARM_EXT_SEC)
/* v7-a+mp+sec. */