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Re: [PATCH, ARM] Implement __ARM_FEATURE_COPROC coprocessor intrinsic feature macro

From: Christophe Lyon <christophe dot lyon at linaro dot org>
To: "Richard Earnshaw (lists)" <Richard dot Earnshaw at arm dot com>
Cc: Prakhar Bahuguna <prakhar dot bahuguna at arm dot com>, "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>, nd <nd at arm dot com>, Ramana Radhakrishnan <Ramana dot Radhakrishnan at arm dot com>, Kyrill Tkachov <Kyrylo dot Tkachov at foss dot arm dot com>
Date: Wed, 21 Jun 2017 18:54:01 +0200
Subject: Re: [PATCH, ARM] Implement __ARM_FEATURE_COPROC coprocessor intrinsic feature macro
Authentication-results: sourceware.org; auth=none
References: <20170614093535.qcu6x2e5dhphbzyk@e107464-lin.cambridge.arm.com> <7d924fde-aaa9-3489-fc4a-7bedc74cd28c@arm.com> <20170616074800.w5gioskxpxkiy6vr@e107464-lin.cambridge.arm.com> <0c026471-cef3-13cd-dfa8-d727e8d9b13e@arm.com> <20170616145651.zjibagfp5thiirto@e107464-lin.cambridge.arm.com> <7dc38580-cfdc-9e84-0508-60f50e6c927c@arm.com>

Hi,


On 19 June 2017 at 11:32, Richard Earnshaw (lists)
<Richard.Earnshaw@arm.com> wrote:
> On 16/06/17 15:56, Prakhar Bahuguna wrote:
>> On 16/06/2017 15:37:18, Richard Earnshaw (lists) wrote:
>>> On 16/06/17 08:48, Prakhar Bahuguna wrote:
>>>> On 15/06/2017 17:23:43, Richard Earnshaw (lists) wrote:
>>>>> On 14/06/17 10:35, Prakhar Bahuguna wrote:
>>>>>> The ARM ACLE defines the __ARM_FEATURE_COPROC macro which indicates which
>>>>>> coprocessor intrinsics are available for the target. If __ARM_FEATURE_COPROC is
>>>>>> undefined, the target does not support coprocessor intrinsics. The feature
>>>>>> levels are defined as follows:
>>>>>>
>>>>>> +---------+-----------+--------------------------------------------------+
>>>>>> | **Bit** | **Value** | **Intrinsics Available**                         |
>>>>>> +---------+-----------+--------------------------------------------------+
>>>>>> | 0       | 0x1       | __arm_cdp __arm_ldc, __arm_ldcl, __arm_stc,      |
>>>>>> |         |           | __arm_stcl, __arm_mcr and __arm_mrc              |
>>>>>> +---------+-----------+--------------------------------------------------+
>>>>>> | 1       | 0x2       | __arm_cdp2, __arm_ldc2, __arm_stc2, __arm_ldc2l, |
>>>>>> |         |           | __arm_stc2l, __arm_mcr2 and __arm_mrc2           |
>>>>>> +---------+-----------+--------------------------------------------------+
>>>>>> | 2       | 0x4       | __arm_mcrr and __arm_mrrc                        |
>>>>>> +---------+-----------+--------------------------------------------------+
>>>>>> | 3       | 0x8       | __arm_mcrr2 and __arm_mrrc2                      |
>>>>>> +---------+-----------+--------------------------------------------------+
>>>>>>
>>>>>> This patch implements full support for this feature macro as defined in section
>>>>>> 5.9 of the ACLE
>>>>>> (https://developer.arm.com/products/software-development-tools/compilers/arm-compiler-5/docs/101028/latest/5-feature-test-macros).
>>>>>>
>>>>>> gcc/ChangeLog:
>>>>>>
>>>>>> 2017-06-14  Prakhar Bahuguna  <prakhar.bahuguna@arm.com>
>>>>>>
>>>>>>   * config/arm/arm-c.c (arm_cpu_builtins): New block to define
>>>>>>    __ARM_FEATURE_COPROC according to support.
>>>>>>
>>>>>> 2017-06-14  Prakhar Bahuguna  <prakhar.bahuguna@arm.com>
>>>>>>   * gcc/testsuite/gcc.target/arm/acle/cdp.c: Add feature macro bitmap
>>>>>>   test.
>>>>>>   * gcc/testsuite/gcc.target/arm/acle/cdp2.c: Likewise.
>>>>>>   * gcc/testsuite/gcc.target/arm/acle/ldc.c: Likewise.
>>>>>>   * gcc/testsuite/gcc.target/arm/acle/ldc2.c: Likewise.
>>>>>>   * gcc/testsuite/gcc.target/arm/acle/ldc2l.c: Likewise.
>>>>>>   * gcc/testsuite/gcc.target/arm/acle/ldcl.c: Likewise.
>>>>>>   * gcc/testsuite/gcc.target/arm/acle/mcr.c: Likewise.
>>>>>>   * gcc/testsuite/gcc.target/arm/acle/mcr2.c: Likewise.
>>>>>>   * gcc/testsuite/gcc.target/arm/acle/mcrr.c: Likewise.
>>>>>>   * gcc/testsuite/gcc.target/arm/acle/mcrr2.c: Likewise.
>>>>>>   * gcc/testsuite/gcc.target/arm/acle/mrc.c: Likewise.
>>>>>>   * gcc/testsuite/gcc.target/arm/acle/mrc2.c: Likewise.
>>>>>>   * gcc/testsuite/gcc.target/arm/acle/mrrc.c: Likewise.
>>>>>>   * gcc/testsuite/gcc.target/arm/acle/mrrc2.c: Likewise.
>>>>>>   * gcc/testsuite/gcc.target/arm/acle/stc.c: Likewise.
>>>>>>   * gcc/testsuite/gcc.target/arm/acle/stc2.c: Likewise.
>>>>>>   * gcc/testsuite/gcc.target/arm/acle/stc2l.c: Likewise.
>>>>>>   * gcc/testsuite/gcc.target/arm/acle/stcl.c: Likewise.
>>>>>>
>>>>>> Testing done: ACLE regression tests updated with tests for feature macro bits.
>>>>>> All regression tests pass.
>>>>>>
>>>>>> Okay for trunk?
>>>>>>
>>>>>>
>>>>>> 0001-Implement-__ARM_FEATURE_COPROC-coprocessor-intrinsic.patch
>>>>>>
>>>>>>
>>>>>> From 79d71aec9d2bdee936b240ae49368ff5f8d8fc48 Mon Sep 17 00:00:00 2001
>>>>>> From: Prakhar Bahuguna <prakhar.bahuguna@arm.com>
>>>>>> Date: Tue, 2 May 2017 13:43:40 +0100
>>>>>> Subject: [PATCH] Implement __ARM_FEATURE_COPROC coprocessor intrinsic feature
>>>>>>  macro
>>>>>>
>>>>>> ---
>>>>>>  gcc/config/arm/arm-c.c                    | 19 +++++++++++++++++++
>>>>>>  gcc/testsuite/gcc.target/arm/acle/cdp.c   |  3 +++
>>>>>>  gcc/testsuite/gcc.target/arm/acle/cdp2.c  |  3 +++
>>>>>>  gcc/testsuite/gcc.target/arm/acle/ldc.c   |  3 +++
>>>>>>  gcc/testsuite/gcc.target/arm/acle/ldc2.c  |  3 +++
>>>>>>  gcc/testsuite/gcc.target/arm/acle/ldc2l.c |  3 +++
>>>>>>  gcc/testsuite/gcc.target/arm/acle/ldcl.c  |  3 +++
>>>>>>  gcc/testsuite/gcc.target/arm/acle/mcr.c   |  3 +++
>>>>>>  gcc/testsuite/gcc.target/arm/acle/mcr2.c  |  3 +++
>>>>>>  gcc/testsuite/gcc.target/arm/acle/mcrr.c  |  3 +++
>>>>>>  gcc/testsuite/gcc.target/arm/acle/mcrr2.c |  3 +++
>>>>>>  gcc/testsuite/gcc.target/arm/acle/mrc.c   |  3 +++
>>>>>>  gcc/testsuite/gcc.target/arm/acle/mrc2.c  |  3 +++
>>>>>>  gcc/testsuite/gcc.target/arm/acle/mrrc.c  |  3 +++
>>>>>>  gcc/testsuite/gcc.target/arm/acle/mrrc2.c |  3 +++
>>>>>>  gcc/testsuite/gcc.target/arm/acle/stc.c   |  3 +++
>>>>>>  gcc/testsuite/gcc.target/arm/acle/stc2.c  |  3 +++
>>>>>>  gcc/testsuite/gcc.target/arm/acle/stc2l.c |  3 +++
>>>>>>  gcc/testsuite/gcc.target/arm/acle/stcl.c  |  3 +++
>>>>>>  19 files changed, 73 insertions(+)
>>>>>>
>>>>>> diff --git a/gcc/config/arm/arm-c.c b/gcc/config/arm/arm-c.c
>>>>>> index 3abe7d1f1f5..3daf4e5e1f3 100644
>>>>>> --- a/gcc/config/arm/arm-c.c
>>>>>> +++ b/gcc/config/arm/arm-c.c
>>>>>> @@ -200,6 +200,25 @@ arm_cpu_builtins (struct cpp_reader* pfile)
>>>>>>    def_or_undef_macro (pfile, "__ARM_FEATURE_IDIV", TARGET_IDIV);
>>>>>>
>>>>>>    def_or_undef_macro (pfile, "__ARM_ASM_SYNTAX_UNIFIED__", inline_asm_unified);
>>>>>> +
>>>>>> +  if ((!TARGET_THUMB || TARGET_THUMB2) && arm_arch4 &&
>>>>>
>>>>> (!TARGET_THUMB || TARGET_THUMB2) looks to me to be equivalent to
>>>>> TARGET_32BIT.  That should be used in preference.
>>>> TARGET_32BIT is defined to be (TARGET_ARM || arm_arch_thumb2). This is not true
>>>> for ARMv8-M Baseline which supports neither ARM mode nor the full Thumb2 mode,
>>>> so this alternative is used.
>>>
>>> That's irrelevant since that case is caught by the arm_arch_notm test.
>>>
>>> #define TARGET_32BIT                    (TARGET_ARM || arm_arch_thumb2)
>>> #define TARGET_THUMB2                   (TARGET_THUMB && arm_arch_thumb2)
>>> #define TARGET_ARM                      (! TARGET_THUMB)
>>>
>>> So (!TARGET_THUMB || TARGET_THUMB2)
>>>  = (!TARGET_THUMB || (TARGET_THUMB && arm_arch_thumb2))
>>>   = ((!TARGET_THUMB || TARGET_THUMB) && (!TARGET_THUMB || arm_arch_thumb2))
>>>    = (1 && (!TARGET_THUMB || arm_arch_thumb2))
>>>     = (!TARGET_THUMB || arm_arch_thumb2)
>>>      = (TARGET_ARM || arm_arch_thumb2)
>>>       = TARGET_32BIT
>>>
>>> Please use the latter.
>>>
>>>> The same conditional is used by arm_acle.h.
>>>
>>> A patch to fix that is pre-approved.
>>>
>>>
>>>>
>>>>> Why the test for arm_arch4?  Co-processor instructions in ARM state go
>>>>> back to the dawn of time.
>>>> In arm_acle.h, the coprocessor intrinsics are only enabled for ARMv4 and above,
>>>> hence the macro is only available when the intrinsics are available.
>>>>
>>>>> GNU coding style requires operators on multi-line statements to be at
>>>>> the start of the continuation lines, not at the end of lines.
>>>>>
>>>>>> +      !(arm_arch8 && arm_arch_notm))
>>>>>> +    {
>>>>>> +      int coproc_level = 0x1;
>>>>>> +
>>>>>> +      if (arm_arch5)
>>>>>> + coproc_level |= 0x2;
>>>>>> +      if (arm_arch5e)
>>>>>> + coproc_level |= 0x4;
>>>>>> +      if (arm_arch6)
>>>>>> + coproc_level |= 0x8;
>>>>>> +
>>>>>> +      builtin_define_with_int_value ("__ARM_FEATURE_COPROC", coproc_level);
>>>>>> +    }
>>>>>> +  else
>>>>>> +    {
>>>>>> +      cpp_undef (pfile, "__ARM_FEATURE_COPROC");
>>>>>> +    }
>>>>>
>>>>> Redundant braces around single statement.
>>>>>
>>>>> R.
>>>>
>>>> Thanks, will fix these.
>>>>
>>>
>>
>> Updated to use TARGET_32BIT.
>>
>
> OK.
>
> R.
>
>>
>> 0001-Implement-__ARM_FEATURE_COPROC-coprocessor-intrinsic.patch
>>
>>
>> From 2ebd3971c9fabab8afe3e516dc9fa0bebd55bf3e Mon Sep 17 00:00:00 2001
>> From: Prakhar Bahuguna <prakhar.bahuguna@arm.com>
>> Date: Tue, 2 May 2017 13:43:40 +0100
>> Subject: [PATCH] Implement __ARM_FEATURE_COPROC coprocessor intrinsic feature
>>  macro
>>
>> ---
>>  gcc/config/arm/arm-c.c                    | 16 ++++++++++++++++
>>  gcc/testsuite/gcc.target/arm/acle/cdp.c   |  3 +++
>>  gcc/testsuite/gcc.target/arm/acle/cdp2.c  |  3 +++
>>  gcc/testsuite/gcc.target/arm/acle/ldc.c   |  3 +++
>>  gcc/testsuite/gcc.target/arm/acle/ldc2.c  |  3 +++
>>  gcc/testsuite/gcc.target/arm/acle/ldc2l.c |  3 +++
>>  gcc/testsuite/gcc.target/arm/acle/ldcl.c  |  3 +++
>>  gcc/testsuite/gcc.target/arm/acle/mcr.c   |  3 +++
>>  gcc/testsuite/gcc.target/arm/acle/mcr2.c  |  3 +++
>>  gcc/testsuite/gcc.target/arm/acle/mcrr.c  |  3 +++
>>  gcc/testsuite/gcc.target/arm/acle/mcrr2.c |  3 +++
>>  gcc/testsuite/gcc.target/arm/acle/mrc.c   |  3 +++
>>  gcc/testsuite/gcc.target/arm/acle/mrc2.c  |  3 +++
>>  gcc/testsuite/gcc.target/arm/acle/mrrc.c  |  3 +++
>>  gcc/testsuite/gcc.target/arm/acle/mrrc2.c |  3 +++
>>  gcc/testsuite/gcc.target/arm/acle/stc.c   |  3 +++
>>  gcc/testsuite/gcc.target/arm/acle/stc2.c  |  3 +++
>>  gcc/testsuite/gcc.target/arm/acle/stc2l.c |  3 +++
>>  gcc/testsuite/gcc.target/arm/acle/stcl.c  |  3 +++
>>  19 files changed, 70 insertions(+)
>>
>> diff --git a/gcc/config/arm/arm-c.c b/gcc/config/arm/arm-c.c
>> index 3abe7d1f1f5..a3daa3220a2 100644
>> --- a/gcc/config/arm/arm-c.c
>> +++ b/gcc/config/arm/arm-c.c
>> @@ -200,6 +200,22 @@ arm_cpu_builtins (struct cpp_reader* pfile)
>>    def_or_undef_macro (pfile, "__ARM_FEATURE_IDIV", TARGET_IDIV);
>>
>>    def_or_undef_macro (pfile, "__ARM_ASM_SYNTAX_UNIFIED__", inline_asm_unified);
>> +
>> +  if (TARGET_32BIT && arm_arch4 && !(arm_arch8 && arm_arch_notm))
>> +    {
>> +      int coproc_level = 0x1;
>> +
>> +      if (arm_arch5)
>> +     coproc_level |= 0x2;
>> +      if (arm_arch5e)
>> +     coproc_level |= 0x4;
>> +      if (arm_arch6)
>> +     coproc_level |= 0x8;
>> +
>> +      builtin_define_with_int_value ("__ARM_FEATURE_COPROC", coproc_level);
>> +    }
>> +  else
>> +      cpp_undef (pfile, "__ARM_FEATURE_COPROC");
>>  }
>>
>>  void
>> diff --git a/gcc/testsuite/gcc.target/arm/acle/cdp.c b/gcc/testsuite/gcc.target/arm/acle/cdp.c
>> index 28b218e7cfc..cebd8c4024e 100644
>> --- a/gcc/testsuite/gcc.target/arm/acle/cdp.c
>> +++ b/gcc/testsuite/gcc.target/arm/acle/cdp.c
>> @@ -5,6 +5,9 @@
>>  /* { dg-require-effective-target arm_coproc1_ok } */
>>
>>  #include "arm_acle.h"
>> +#if (__ARM_FEATURE_COPROC & 0x1) == 0
>> +  #error "__ARM_FEATURE_COPROC does not have correct feature bits set"
>> +#endif
>>
>>  void test_cdp (void)
>>  {
>> diff --git a/gcc/testsuite/gcc.target/arm/acle/cdp2.c b/gcc/testsuite/gcc.target/arm/acle/cdp2.c
>> index 00bcd502b56..945d435d2fb 100644
>> --- a/gcc/testsuite/gcc.target/arm/acle/cdp2.c
>> +++ b/gcc/testsuite/gcc.target/arm/acle/cdp2.c
>> @@ -5,6 +5,9 @@
>>  /* { dg-require-effective-target arm_coproc2_ok } */
>>
>>  #include "arm_acle.h"
>> +#if (__ARM_FEATURE_COPROC & 0x2) == 0
>> +  #error "__ARM_FEATURE_COPROC does not have correct feature bits set"
>> +#endif
>>
>>  void test_cdp2 (void)
>>  {
>> diff --git a/gcc/testsuite/gcc.target/arm/acle/ldc.c b/gcc/testsuite/gcc.target/arm/acle/ldc.c
>> index f45f25d8c97..cd57343208f 100644
>> --- a/gcc/testsuite/gcc.target/arm/acle/ldc.c
>> +++ b/gcc/testsuite/gcc.target/arm/acle/ldc.c
>> @@ -5,6 +5,9 @@
>>  /* { dg-require-effective-target arm_coproc1_ok } */
>>
>>  #include "arm_acle.h"
>> +#if (__ARM_FEATURE_COPROC & 0x1) == 0
>> +  #error "__ARM_FEATURE_COPROC does not have correct feature bits set"
>> +#endif
>>
>>  extern void * p;
>>
>> diff --git a/gcc/testsuite/gcc.target/arm/acle/ldc2.c b/gcc/testsuite/gcc.target/arm/acle/ldc2.c
>> index 433bf8a1204..d7691e30d76 100644
>> --- a/gcc/testsuite/gcc.target/arm/acle/ldc2.c
>> +++ b/gcc/testsuite/gcc.target/arm/acle/ldc2.c
>> @@ -5,6 +5,9 @@
>>  /* { dg-require-effective-target arm_coproc2_ok } */
>>
>>  #include "arm_acle.h"
>> +#if (__ARM_FEATURE_COPROC & 0x2) == 0
>> +  #error "__ARM_FEATURE_COPROC does not have correct feature bits set"
>> +#endif
>>
>>  extern void * p;
>>
>> diff --git a/gcc/testsuite/gcc.target/arm/acle/ldc2l.c b/gcc/testsuite/gcc.target/arm/acle/ldc2l.c
>> index 88c8aa44765..9ee63afa055 100644
>> --- a/gcc/testsuite/gcc.target/arm/acle/ldc2l.c
>> +++ b/gcc/testsuite/gcc.target/arm/acle/ldc2l.c
>> @@ -5,6 +5,9 @@
>>  /* { dg-require-effective-target arm_coproc2_ok } */
>>
>>  #include "arm_acle.h"
>> +#if (__ARM_FEATURE_COPROC & 0x2) == 0
>> +  #error "__ARM_FEATURE_COPROC does not have correct feature bits set"
>> +#endif
>>
>>  extern void * p;
>>
>> diff --git a/gcc/testsuite/gcc.target/arm/acle/ldcl.c b/gcc/testsuite/gcc.target/arm/acle/ldcl.c
>> index 72a97f1d7b7..a6bfd9011dc 100644
>> --- a/gcc/testsuite/gcc.target/arm/acle/ldcl.c
>> +++ b/gcc/testsuite/gcc.target/arm/acle/ldcl.c
>> @@ -5,6 +5,9 @@
>>  /* { dg-require-effective-target arm_coproc1_ok } */
>>
>>  #include "arm_acle.h"
>> +#if (__ARM_FEATURE_COPROC & 0x1) == 0
>> +  #error "__ARM_FEATURE_COPROC does not have correct feature bits set"
>> +#endif
>>
>>  extern void * p;
>>
>> diff --git a/gcc/testsuite/gcc.target/arm/acle/mcr.c b/gcc/testsuite/gcc.target/arm/acle/mcr.c
>> index 93f977a2bdb..7095dcbc3ad 100644
>> --- a/gcc/testsuite/gcc.target/arm/acle/mcr.c
>> +++ b/gcc/testsuite/gcc.target/arm/acle/mcr.c
>> @@ -5,6 +5,9 @@
>>  /* { dg-require-effective-target arm_coproc1_ok } */
>>
>>  #include "arm_acle.h"
>> +#if (__ARM_FEATURE_COPROC & 0x1) == 0
>> +  #error "__ARM_FEATURE_COPROC does not have correct feature bits set"
>> +#endif
>>
>>  void test_mcr (uint32_t a)
>>  {
>> diff --git a/gcc/testsuite/gcc.target/arm/acle/mcr2.c b/gcc/testsuite/gcc.target/arm/acle/mcr2.c
>> index 5b60d10ff25..2a4b0ce4559 100644
>> --- a/gcc/testsuite/gcc.target/arm/acle/mcr2.c
>> +++ b/gcc/testsuite/gcc.target/arm/acle/mcr2.c
>> @@ -5,6 +5,9 @@
>>  /* { dg-require-effective-target arm_coproc2_ok } */
>>
>>  #include "arm_acle.h"
>> +#if (__ARM_FEATURE_COPROC & 0x2) == 0
>> +  #error "__ARM_FEATURE_COPROC does not have correct feature bits set"
>> +#endif
>>
>>  void test_mcr2 (uint32_t a)
>>  {
>> diff --git a/gcc/testsuite/gcc.target/arm/acle/mcrr.c b/gcc/testsuite/gcc.target/arm/acle/mcrr.c
>> index dcc223c713d..bcfbe1a4855 100644
>> --- a/gcc/testsuite/gcc.target/arm/acle/mcrr.c
>> +++ b/gcc/testsuite/gcc.target/arm/acle/mcrr.c
>> @@ -5,6 +5,9 @@
>>  /* { dg-require-effective-target arm_coproc3_ok } */
>>
>>  #include "arm_acle.h"
>> +#if (__ARM_FEATURE_COPROC & 0x4) == 0
>> +  #error "__ARM_FEATURE_COPROC does not have correct feature bits set"
>> +#endif
>>
>>  void test_mcrr (uint64_t a)
>>  {
>> diff --git a/gcc/testsuite/gcc.target/arm/acle/mcrr2.c b/gcc/testsuite/gcc.target/arm/acle/mcrr2.c
>> index 10f2014d447..afd07e67f21 100644
>> --- a/gcc/testsuite/gcc.target/arm/acle/mcrr2.c
>> +++ b/gcc/testsuite/gcc.target/arm/acle/mcrr2.c
>> @@ -5,6 +5,9 @@
>>  /* { dg-require-effective-target arm_coproc4_ok } */
>>
>>  #include "arm_acle.h"
>> +#if (__ARM_FEATURE_COPROC & 0x8) == 0
>> +  #error "__ARM_FEATURE_COPROC does not have correct feature bits set"
>> +#endif
>>
>>  void test_mcrr2 (uint64_t a)
>>  {
>> diff --git a/gcc/testsuite/gcc.target/arm/acle/mrc.c b/gcc/testsuite/gcc.target/arm/acle/mrc.c
>> index 34ca6a1638c..809b6c9c265 100644
>> --- a/gcc/testsuite/gcc.target/arm/acle/mrc.c
>> +++ b/gcc/testsuite/gcc.target/arm/acle/mrc.c
>> @@ -5,6 +5,9 @@
>>  /* { dg-require-effective-target arm_coproc1_ok } */
>>
>>  #include "arm_acle.h"
>> +#if (__ARM_FEATURE_COPROC & 0x1) == 0
>> +  #error "__ARM_FEATURE_COPROC does not have correct feature bits set"
>> +#endif
>>
>>  uint32_t test_mrc (void)
>>  {
>> diff --git a/gcc/testsuite/gcc.target/arm/acle/mrc2.c b/gcc/testsuite/gcc.target/arm/acle/mrc2.c
>> index 3b72a402224..4c06ea39b37 100644
>> --- a/gcc/testsuite/gcc.target/arm/acle/mrc2.c
>> +++ b/gcc/testsuite/gcc.target/arm/acle/mrc2.c
>> @@ -5,6 +5,9 @@
>>  /* { dg-require-effective-target arm_coproc2_ok } */
>>
>>  #include "arm_acle.h"
>> +#if (__ARM_FEATURE_COPROC & 0x2) == 0
>> +  #error "__ARM_FEATURE_COPROC does not have correct feature bits set"
>> +#endif
>>
>>  uint32_t test_mrc2 (void)
>>  {
>> diff --git a/gcc/testsuite/gcc.target/arm/acle/mrrc.c b/gcc/testsuite/gcc.target/arm/acle/mrrc.c
>> index 28c3b8ea6b5..802de083d5c 100644
>> --- a/gcc/testsuite/gcc.target/arm/acle/mrrc.c
>> +++ b/gcc/testsuite/gcc.target/arm/acle/mrrc.c
>> @@ -5,6 +5,9 @@
>>  /* { dg-require-effective-target arm_coproc3_ok } */
>>
>>  #include "arm_acle.h"
>> +#if (__ARM_FEATURE_COPROC & 0x4) == 0
>> +  #error "__ARM_FEATURE_COPROC does not have correct feature bits set"
>> +#endif
>>
>>  uint64_t test_mrrc (void)
>>  {
>> diff --git a/gcc/testsuite/gcc.target/arm/acle/mrrc2.c b/gcc/testsuite/gcc.target/arm/acle/mrrc2.c
>> index 5b7aab06222..adf39563e29 100644
>> --- a/gcc/testsuite/gcc.target/arm/acle/mrrc2.c
>> +++ b/gcc/testsuite/gcc.target/arm/acle/mrrc2.c
>> @@ -5,6 +5,9 @@
>>  /* { dg-require-effective-target arm_coproc4_ok } */
>>
>>  #include "arm_acle.h"
>> +#if (__ARM_FEATURE_COPROC & 0x8) == 0
>> +  #error "__ARM_FEATURE_COPROC does not have correct feature bits set"
>> +#endif
>>
>>  uint64_t test_mrrc2 (void)
>>  {
>> diff --git a/gcc/testsuite/gcc.target/arm/acle/stc.c b/gcc/testsuite/gcc.target/arm/acle/stc.c
>> index 7c6e04fe0fe..2714f65787e 100644
>> --- a/gcc/testsuite/gcc.target/arm/acle/stc.c
>> +++ b/gcc/testsuite/gcc.target/arm/acle/stc.c
>> @@ -5,6 +5,9 @@
>>  /* { dg-require-effective-target arm_coproc1_ok } */
>>
>>  #include "arm_acle.h"
>> +#if (__ARM_FEATURE_COPROC & 0x1) == 0
>> +  #error "__ARM_FEATURE_COPROC does not have correct feature bits set"
>> +#endif
>>
>>  extern void * p;
>>
>> diff --git a/gcc/testsuite/gcc.target/arm/acle/stc2.c b/gcc/testsuite/gcc.target/arm/acle/stc2.c
>> index 1578f7b1136..0a84652e0f0 100644
>> --- a/gcc/testsuite/gcc.target/arm/acle/stc2.c
>> +++ b/gcc/testsuite/gcc.target/arm/acle/stc2.c
>> @@ -5,6 +5,9 @@
>>  /* { dg-require-effective-target arm_coproc2_ok } */
>>
>>  #include "arm_acle.h"
>> +#if (__ARM_FEATURE_COPROC & 0x2) == 0
>> +  #error "__ARM_FEATURE_COPROC does not have correct feature bits set"
>> +#endif
>>
>>  extern void * p;
>>
>> diff --git a/gcc/testsuite/gcc.target/arm/acle/stc2l.c b/gcc/testsuite/gcc.target/arm/acle/stc2l.c
>> index 7adbd60d48a..2453d04ad72 100644
>> --- a/gcc/testsuite/gcc.target/arm/acle/stc2l.c
>> +++ b/gcc/testsuite/gcc.target/arm/acle/stc2l.c
>> @@ -5,6 +5,9 @@
>>  /* { dg-require-effective-target arm_coproc2_ok } */
>>
>>  #include "arm_acle.h"
>> +#if (__ARM_FEATURE_COPROC & 0x2) == 0
>> +  #error "__ARM_FEATURE_COPROC does not have correct feature bits set"
>> +#endif
>>
>>  extern void * p;
>>
>> diff --git a/gcc/testsuite/gcc.target/arm/acle/stcl.c b/gcc/testsuite/gcc.target/arm/acle/stcl.c
>> index 2fd5edd02d7..affdaa27982 100644
>> --- a/gcc/testsuite/gcc.target/arm/acle/stcl.c
>> +++ b/gcc/testsuite/gcc.target/arm/acle/stcl.c
>> @@ -5,6 +5,9 @@
>>  /* { dg-require-effective-target arm_coproc1_ok } */
>>
>>  #include "arm_acle.h"
>> +#if (__ARM_FEATURE_COPROC & 0x1) == 0
>> +  #error "__ARM_FEATURE_COPROC does not have correct feature bits set"
>> +#endif
>>
>>  extern void * p;
>>
>>
>

References:
- [PATCH, ARM] Implement __ARM_FEATURE_COPROC coprocessor intrinsic feature macro
  - From: Prakhar Bahuguna
- Re: [PATCH, ARM] Implement __ARM_FEATURE_COPROC coprocessor intrinsic feature macro
  - From: Richard Earnshaw (lists)
- Re: [PATCH, ARM] Implement __ARM_FEATURE_COPROC coprocessor intrinsic feature macro
  - From: Prakhar Bahuguna
- Re: [PATCH, ARM] Implement __ARM_FEATURE_COPROC coprocessor intrinsic feature macro
  - From: Richard Earnshaw (lists)
- Re: [PATCH, ARM] Implement __ARM_FEATURE_COPROC coprocessor intrinsic feature macro
  - From: Prakhar Bahuguna
- Re: [PATCH, ARM] Implement __ARM_FEATURE_COPROC coprocessor intrinsic feature macro
  - From: Richard Earnshaw (lists)

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