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/GCC 7

6.32.14 V850 Variable Attributes

These variable attributes are supported by the V850 back end:

sda

Use this attribute to explicitly place a variable in the small data area, which can hold up to 64 kilobytes.

tda

Use this attribute to explicitly place a variable in the tiny data area, which can hold up to 256 bytes in total.

zda

Use this attribute to explicitly place a variable in the first 32 kilobytes of memory.

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https://gcc.gnu.org/onlinedocs/gcc-7.2.0/gcc/V850-Variable-Attributes.html