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Add assembler support for ARMv8-M Mainline

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

bfd/
    (tag_cpu_arch_combine): Adjust v4t_plus_v6_m and comb array to account
    for new TAG_CPU_ARCH_V4T_PLUS_V6_M value.  Deal with NULL values in
    comb array.

binutils/
    * readelf.c (arm_attr_tag_CPU_arch): Add ARMv8-M Mainline Tag_CPU_arch
    value.
    (arm_attr_tag_THUMB_ISA_use): Add ARMv8-M Mainline Tag_THUMB_ISA_use
    value.

gas/
    * config/tc-arm.c (arm_ext_m): Include ARMv8-M.
    (arm_ext_v8m): New feature for ARMv8-M.
    (arm_ext_atomics): New feature for ARMv8 atomics.
    (do_tt): New encoding function for TT* instructions.
    (insns): Add new entries for ARMv8-M specific instructions and
    reorganize the ones shared by ARMv8-M Mainline and ARMv8-A.
    (arm_archs): Define armv8-m.main architecture.
    (cpu_arch_ver): Define ARM_ARCH_V8M_MAIN architecture version and
    clarify the ordering rule.
    (aeabi_set_public_attributes): Use TAG_CPU_ARCH_* macro to refer to
    Tag_CPU_arch values for ARMv7e-M detection.  Add logic to keep setting
    Tag_CPU_arch to ARMv8-A for -march=all.  Also set Tag_CPU_arch_profile
    to 'A' if extension bit for atomic instructions is set, unless it is
    ARMv8-M.  Set Tag_THUMB_ISA_use to 3 for ARMv8-M.  Set Tag_DIV_use to 0
    for ARMv8-M Mainline.

gas/testsuite/
    * gas/arm/archv8m.s: New file.
    * gas/arm/archv8m-main.d: Likewise.
    * gas/arm/attr-march-armv8m.main.d: Likewise.
    * gas/arm/any-armv8m.s: Likewise.
    * gas/arm/any-armv8m.d: Likewise.

include/elf/
    * arm.h (TAG_CPU_ARCH_V8M_MAIN): Declare.
    (MAX_TAG_CPU_ARCH): Define to TAG_CPU_ARCH_V8M_MAIN.
    (TAG_CPU_ARCH_V4T_PLUS_V6_M): Define to unused value 15.

include/opcode/
    * arm.h (ARM_EXT2_ATOMICS): New extension bit.
    (ARM_EXT2_V8M): Likewise.
    (ARM_EXT_V8): Adjust comment with regards to atomics and remove
    mention of legacy use for that bit.
    (ARM_AEXT2_V8_1A): New architecture extension bitfield.
    (ARM_AEXT2_V8_2A): Likewise.
    (ARM_AEXT_V8M_MAIN): Likewise.
    (ARM_AEXT2_V8M): Likewise.
    (ARM_ARCH_V8A): Use ARM_EXT2_ATOMICS for features in second bitfield.
    (ARM_ARCH_V8_1A): Likewise with ARM_AEXT2_V8_1A.
    (ARM_ARCH_V8_2A): Likewise with ARM_AEXT2_V8_2A.
    (ARM_ARCH_V8M_MAIN): New architecture feature bitfield.
    (ARM_ARCH_V8A_FP): Use ARM_EXT2_ATOMICS for features in second bitfield
    and reindent.
    (ARM_ARCH_V8A_SIMD): Likewise.
    (ARM_ARCH_V8A_CRYPTOV1): Likewise.
    (ARM_ARCH_V8_1A_FP): Use ARM_AEXT2_V8_1A to set second bitfield of
    feature bits.
    (ARM_ARCH_V8_1A_SIMD): Likewise.
    (ARM_ARCH_V8_1A_CRYPTOV1): Likewise.

opcodes/
    * arm-dis.c (arm_opcodes): Guard lda, ldab, ldaex, ldaexb, ldaexh, stl,
    stlb, stlh, stlex, stlexb and stlexh by ARM_EXT2_ATOMICS instead of
    ARM_EXT_V8.
    (thumb32_opcodes): Add entries for wide ARMv8-M instructions.
This commit is contained in:
Thomas Preud'homme 2015-12-24 17:16:19 +08:00
parent fc289b0a83
commit 4ed7ed8db2
18 changed files with 322 additions and 62 deletions
Download patch file Download diff file Expand all files Collapse all files

40
include/opcode/arm.h
View file

@ -33,8 +33,7 @@
#define ARM_EXT_V5J 0x00000800 /* Jazelle extension. */
#define ARM_EXT_V6 0x00001000 /* ARM V6. */
#define ARM_EXT_V6K 0x00002000 /* ARM V6K. */
/* 0x00004000 Was ARM V6Z. */
#define ARM_EXT_V8 0x00004000 /* is now ARMv8. */
#define ARM_EXT_V8 0x00004000 /* ARMv8 w/o atomics. */
#define ARM_EXT_V6T2 0x00008000 /* Thumb-2. */
#define ARM_EXT_DIV 0x00010000 /* Integer division. */
/* The 'M' in Arm V7M stands for Microcontroller.
@ -59,6 +58,8 @@
#define ARM_EXT2_PAN 0x00000001 /* PAN extension. */
#define ARM_EXT2_V8_2A 0x00000002 /* ARM V8.2A. */
#define ARM_EXT2_V8M 0x00000004 /* ARM V8M. */
#define ARM_EXT2_ATOMICS 0x00000008 /* ARMv8 atomics. */
/* Co-processor space extensions. */
#define ARM_CEXT_XSCALE 0x00000001 /* Allow MIA etc. */
@ -141,6 +142,10 @@
#define ARM_AEXT_V8A \
(ARM_AEXT_V7A | ARM_EXT_MP | ARM_EXT_SEC | ARM_EXT_DIV | ARM_EXT_ADIV \
| ARM_EXT_VIRT | ARM_EXT_V8)
#define ARM_AEXT2_V8_1A (ARM_EXT2_ATOMICS | ARM_EXT2_PAN)
#define ARM_AEXT2_V8_2A (ARM_AEXT2_V8_1A | ARM_EXT2_V8_2A)
#define ARM_AEXT_V8M_MAIN ARM_AEXT_V7M
#define ARM_AEXT2_V8M (ARM_EXT2_V8M | ARM_EXT2_ATOMICS)
/* Processors with specific extensions in the co-processor space. */
#define ARM_ARCH_XSCALE ARM_FEATURE_LOW (ARM_AEXT_V5TE, ARM_CEXT_XSCALE)
@ -250,12 +255,12 @@
#define ARM_ARCH_V7R ARM_FEATURE_CORE_LOW (ARM_AEXT_V7R)
#define ARM_ARCH_V7M ARM_FEATURE_CORE_LOW (ARM_AEXT_V7M)
#define ARM_ARCH_V7EM ARM_FEATURE_CORE_LOW (ARM_AEXT_V7EM)
#define ARM_ARCH_V8A ARM_FEATURE_CORE_LOW (ARM_AEXT_V8A)
#define ARM_ARCH_V8_1A ARM_FEATURE (ARM_AEXT_V8A, ARM_EXT2_PAN, \
#define ARM_ARCH_V8A ARM_FEATURE_CORE (ARM_AEXT_V8A, ARM_EXT2_ATOMICS)
#define ARM_ARCH_V8_1A ARM_FEATURE (ARM_AEXT_V8A, ARM_AEXT2_V8_1A, \
CRC_EXT_ARMV8)
#define ARM_ARCH_V8_2A ARM_FEATURE (ARM_AEXT_V8A, \
ARM_EXT2_PAN | ARM_EXT2_V8_2A, \
#define ARM_ARCH_V8_2A ARM_FEATURE (ARM_AEXT_V8A, ARM_AEXT2_V8_2A, \
CRC_EXT_ARMV8)
#define ARM_ARCH_V8M_MAIN ARM_FEATURE_CORE (ARM_AEXT_V8M_MAIN, ARM_AEXT2_V8M)
/* Some useful combinations: */
#define ARM_ARCH_NONE ARM_FEATURE_LOW (0, 0)
@ -277,23 +282,24 @@
/* Features that are present in v6M and v6S-M but not other v6 cores. */
#define ARM_ARCH_V6M_ONLY ARM_FEATURE_CORE_LOW (ARM_AEXT_V6M_ONLY)
/* v8-a+fp. */
#define ARM_ARCH_V8A_FP ARM_FEATURE_LOW (ARM_AEXT_V8A, FPU_ARCH_VFP_ARMV8)
#define ARM_ARCH_V8A_FP \
ARM_FEATURE (ARM_AEXT_V8A, ARM_EXT2_ATOMICS, FPU_ARCH_VFP_ARMV8)
/* v8-a+simd (implies fp). */
#define ARM_ARCH_V8A_SIMD ARM_FEATURE_LOW (ARM_AEXT_V8A, \
FPU_ARCH_NEON_VFP_ARMV8)
#define ARM_ARCH_V8A_SIMD \
ARM_FEATURE (ARM_AEXT_V8A, ARM_EXT2_ATOMICS, FPU_ARCH_NEON_VFP_ARMV8)
/* v8-a+crypto (implies simd+fp). */
#define ARM_ARCH_V8A_CRYPTOV1 ARM_FEATURE_LOW (ARM_AEXT_V8A, \
FPU_ARCH_CRYPTO_NEON_VFP_ARMV8)
#define ARM_ARCH_V8A_CRYPTOV1 \
ARM_FEATURE (ARM_AEXT_V8A, ARM_EXT2_ATOMICS, FPU_ARCH_CRYPTO_NEON_VFP_ARMV8)
/* v8.1-a+fp. */
#define ARM_ARCH_V8_1A_FP ARM_FEATURE (ARM_AEXT_V8A, ARM_EXT2_PAN, \
FPU_ARCH_VFP_ARMV8)
#define ARM_ARCH_V8_1A_FP \
ARM_FEATURE (ARM_AEXT_V8A, ARM_AEXT2_V8_1A, FPU_ARCH_VFP_ARMV8)
/* v8.1-a+simd (implies fp). */
#define ARM_ARCH_V8_1A_SIMD ARM_FEATURE (ARM_AEXT_V8A, ARM_EXT2_PAN, \
FPU_ARCH_NEON_VFP_ARMV8_1)
#define ARM_ARCH_V8_1A_SIMD \
ARM_FEATURE (ARM_AEXT_V8A, ARM_AEXT2_V8_1A, FPU_ARCH_NEON_VFP_ARMV8_1)
/* v8.1-a+crypto (implies simd+fp). */
#define ARM_ARCH_V8_1A_CRYPTOV1 ARM_FEATURE (ARM_AEXT_V8A, ARM_EXT2_PAN, \
FPU_ARCH_CRYPTO_NEON_VFP_ARMV8_1)
#define ARM_ARCH_V8_1A_CRYPTOV1 \
ARM_FEATURE (ARM_AEXT_V8A, ARM_AEXT2_V8_1A, FPU_ARCH_CRYPTO_NEON_VFP_ARMV8_1)
/* There are too many feature bits to fit in a single word, so use a