minor docs and fixes

Author: mateoconlechuga

docs/static/asm.rst

@@ -110,6 +110,12 @@ Below is an example C prototype followed by the assembly implementation:
         printf("asm_func returned %d\n", ret);
     }
 
+Preserve
+^^^^^^^^
+
+Assembly routines must preserve the :code:`IX` and :code:`SP` registers.
+All other registers are free for use.
+
 Arguments
 ^^^^^^^^^
 
@@ -131,6 +137,8 @@ Note that :code:`sp + [0,2]` contains the return address.
 +------------+------------+----------------------+
 | long       | 4 bytes    | sp + [3,6]           |
 +------------+------------+----------------------+
+| (u)int48_t | 6 bytes    | sp + [3,8]           |
++------------+------------+----------------------+
 | long long  | 8 bytes    | sp + [3,10]          |
 +------------+------------+----------------------+
 | float      | 4 bytes    | sp + [3,6]           |
@@ -158,6 +166,8 @@ The LSB is located in the register on the far right of the expression, e.g. ``E:
 +------------+-------------------+
 | long       | E:UHL             |
 +------------+-------------------+
+| (u)int48_t | UDE:UHL           |
++------------+-------------------+
 | long long  | BC:UDE:UHL        |
 +------------+-------------------+
 | float      | E:UHL             |

src/ce/include/ti/vars.h

@@ -182,7 +182,7 @@ extern "C" {
 
 /**
  * Name of L1 list variable.
- * Other matrix variables follow the naming format `OS_VAR_L?` where `?`
+ * Other list variables follow the naming format `OS_VAR_L?` where `?`
  * is the value [1-6].
  */
 #define OS_VAR_L1       "\x5D\x0\0"

src/libc/nanoprintf.c

@@ -36,6 +36,7 @@
    be nanoprintf.c. */
 
 #define NANOPRINTF_IMPLEMENTATION
+#define NANOPRINTF_SNPRINTF_SAFE_TRIM_STRING_ON_OVERFLOW
 
 #ifdef NANOPRINTF_IMPLEMENTATION