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lib/math32: Avoid __uint128_t casts for LDC ImportC

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Building the hello_d example with LDC ImportC fails because ImportC
does not correctly handle direct __uint128_t C-style casts such as
(__uint128_t)a and (__uint128_t)1.

Replace the direct casts with equivalent typed temporaries, preserving
the existing behavior while allowing hello_d to build successfully with
LDC ImportC.

Verified on sim:nsh with CONFIG_EXAMPLES_HELLO_D=y:

  nsh> hello_d
  Hello World, [skylake]!
  DHelloWorld.HelloWorld: Hello, World!!

Signed-off-by: Ansh Rai <anshrai331@gmail.com>
This commit is contained in:
Ansh Rai 2026-07-21 15:05:56 +00:00 • committed by Alan C. Assis
parent 6283d667ea
commit d0651aad54
1 changed files with 4 additions and 2 deletions
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6
include/nuttx/lib/math32.h
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@ -495,7 +495,8 @@ static inline_function uint64_t invdiv_umulh64(uint64_t a, uint64_t b)
* the inline assembly.
*/
__uint128_t res128 = (__uint128_t)a * b;
__uint128_t a128 = a;
__uint128_t res128 = a128 * b;
return res128 >> 64;
#endif
}
@ -542,7 +543,8 @@ void invdiv_init_param64(uint64_t d, FAR invdiv_param64_t *param)
param->mult = q[0] + 1;
#else
param->mult = ((__uint128_t)1 << 64) * t / d + 1;
__uint128_t one128 = 1;
param->mult = (one128 << 64) * t / d + 1;
#endif
param->shift = l - 1;
}