blender patches

blender-patches/0006-fix_Cycles_compilation_on_ARM.patch

@@ -0,0 +1,40 @@
+From: Sergey Sharybin <sergey@blender.org>
+Date: Wed, 9 Feb 2022 23:15:50 +0100
+Subject: fix_Cycles_compilation_on_ARM
+
+The rbit instruction is only available starting with ARMv6T2 and
+the register prefix is different from what AARCH64 uses.
+
+Separate the 32 and 64 bit ARM branches, add missing ISA checks.
+
+Made sure the code works as intended on macMini with Apple silicon,
+and on Raspberry Pi 4 B running 32bit Raspbian OS.
+
+Differential Revision: https://developer.blender.org/D14056
+
+Signed-off-by: Matteo F. Vescovi <mfv@debian.org>
+---
+ intern/cycles/util/math.h | 8 +++++++-
+ 1 file changed, 7 insertions(+), 1 deletion(-)
+
+diff --git a/intern/cycles/util/math.h b/intern/cycles/util/math.h
+index 4e0e97f..7fc829f 100644
+--- a/intern/cycles/util/math.h
++++ b/intern/cycles/util/math.h
+@@ -849,9 +849,15 @@ ccl_device_inline uint prev_power_of_two(uint x)
+ ccl_device_inline uint32_t reverse_integer_bits(uint32_t x)
+ {
+   /* Use a native instruction if it exists. */
+-#if defined(__arm__) || defined(__aarch64__)
++#if defined(__aarch64__) || defined(_M_ARM64)
++  /* Assume the rbit is always available on 64bit ARM architecture. */
+   __asm__("rbit %w0, %w1" : "=r"(x) : "r"(x));
+   return x;
++#elif defined(__arm__) && ((__ARM_ARCH > 7) || __ARM_ARCH == 6 && __ARM_ARCH_ISA_THUMB >= 2)
++  /* This ARM instruction is available in ARMv6T2 and above.
++   * This 32-bit Thumb instruction is available in ARMv6T2 and above. */
++  __asm__("rbit %0, %1" : "=r"(x) : "r"(x));
++  return x;
+ #elif defined(__KERNEL_CUDA__)
+   return __brev(x);
+ #elif __has_builtin(__builtin_bitreverse32)