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arm: Profile/variation detection improvements

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* Detection of 64-bit Arm v8-a
 * Proper detection of integer division support
   * always on v7-m, v8-a, v9-a, v8-m.main
   * sometimes on v7-a, v7-r, v8-r
   * never on v8-m.base v6-m, v6 and older "classic"
   * tl;dr: Rely on toolchain preprocessor definition

For the most part these additional variations won't acutally work
for native target builds, but sane -A detection is needed for
"local" builds now. -R detection is left out as it's not likely
to matter.

Change-Id: I8f6a52edc4d14490fc00e2f487406eca701eef02
This commit is contained in:
Solomon Peachy 2025-12-04 20:20:35 -05:00
parent 6d39bf5e48
commit afe128f4cc
4 changed files with 30 additions and 90 deletions
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13
firmware/export/config.h
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@ -711,21 +711,18 @@ Lyre prototype 1 */
/* define for all cpus from ARM family */
#if ARCH == ARCH_ARM
#define CPU_ARM
#define ARM_ARCH ARCH_VERSION /* ARMv{4,5,6,7} */
#define ARM_PROFILE ARCH_PROFILE /* Classic, Microcontroller */
#define ARM_ARCH ARCH_VERSION /* ARMv{4,5,6,7,8,9} */
#define ARM_PROFILE ARCH_PROFILE /* Classic, Microcontroller, Application [,Realtime] */
# if ARM_PROFILE == ARM_PROFILE_MICRO
# define CPU_ARM_MICRO
# if (ARM_ARCH >= 7)
# define ARM_HAVE_HW_DIV
# endif
# elif ARM_PROFILE == ARM_PROFILE_CLASSIC
# define CPU_ARM_CLASSIC
# elif ARM_PROFILE == ARM_PROFILE_APPLICATION
# define CPU_ARM_APPLICATION
# if defined(__ARM_FEATURE_IDIV) // Some v7-a, all v8-a
# define ARM_HAVE_HW_DIV
# endif
# endif
#if defined(__ARM_FEATURE_IDIV)
# define ARM_HAVE_HW_DIV
#endif
# if (CONFIG_PLATFORM & PLATFORM_NATIVE) && !defined(ARM_HAVE_HW_DIV)
# define ARM_NEED_DIV0
# endif