#include <stddef.h>
#include <stdint.h>

/*
/data/software/venus-master/build/tmp/work/cortexa7hf-neon-vfpv4-oe-linux-gnueabi/nodejs/22.15.0/recipe-sysroot-native/usr/bin/arm-oe-linux-gnueabi/arm-oe-linux-gnueabi-gcc -mfpu=neon-vfpv4 -mfloat-abi=hard -mcpu=cortex-a7 --sysroot=/data/software/venus-master/build/tmp/work/cortexa7hf-neon-vfpv4-oe-linux-gnueabi/nodejs/22.15.0/recipe-sysroot -O2 -c -o ldrd.o ldrd.c
*/

extern uint8_t *ext_base;

int64_t *add_addr(uint8_t *array_buffer, size_t addr)
{
	return (int64_t *) (array_buffer + addr);
}

// ldrd	r2, [r1, r2]
void test(void *dummy, uint8_t *base, size_t addr)
{
	int64_t *p = add_addr(base, addr);
	int64_t value2 = __atomic_load_n(p, __ATOMIC_SEQ_CST);
}

// ldrd	r0, [r3, r0]
int64_t test_r0(size_t addr)
{
	int64_t *p = add_addr(ext_base, addr);
	return __atomic_load_n(p, __ATOMIC_SEQ_CST);
}

----------------------------------------------------------------------------------

Disassembly of section .text:

00000000 <add_addr>:
   0:	e0800001 	add	r0, r0, r1
   4:	e12fff1e 	bx	lr

00000008 <test>:
   8:	f57ff05b 	dmb	ish
   c:	e18120d2 	ldrd	r2, [r1, r2]
  10:	f57ff05b 	dmb	ish
  14:	e12fff1e 	bx	lr

00000018 <test_r0>:
  18:	e3003000 	movw	r3, #0
  1c:	e3403000 	movt	r3, #0
  20:	e5933000 	ldr	r3, [r3]
  24:	f57ff05b 	dmb	ish
  28:	e18300d0 	ldrd	r0, [r3, r0]
  2c:	f57ff05b 	dmb	ish
  30:	e12fff1e 	bx	lr