fox-tools/gcc/call.h

21 lines
599 B
C

#pragma once
#define STR2(x) #x
#define STR(x) STR2(x)
#define _call2(c, jt_addr) \
asm("li t6,ret_" #c "\n" \
"addi sp,sp,-4\n" \
"sw t6,0(sp)\n" \
"li t6,[" STR(jt_addr) "]\n" \
"jr t6\n" \
"ret_" #c ":" \
::: "t6" \
);
#define _call(c, jt_addr) _call2(c, jt_addr)
#define call(jt_addr) _call(__COUNTER__, jt_addr)
#define parameter(i, p) asm("mv x" #i ",%0" :: "r" (p) : "x" #i)
#define ret(i, var) asm("mv %0,x" #i : "=r" (var) :: "x" #i)