Cross platform vm

• For Windows user, download: libdl.
• Also check: Tsoding's bm.

How to run example

• Linux:
  • Change the .dll to .so in the import statements
  • ./jvavc malloc.jvav
  • ./jvav malloc
• Windows Powershell:
  • Change the .so to .dll in the import statements
  • ./jvavc malloc.jvav
  • ./jvav malloc

no operation

• INST_NOP
  • nop
  • no operation.

push and pop and swap

• INST_PUSH
  • push
  • push a i64/u64/f64 to the stack, effectively increase stack size by one.
• INST_POP
  • pop
  • remove specified amount of variable from the stack starting from the top of the stack.
• INST_DUP
  • dup
  • duplicate the variable relative to the top of the stack to the stack top, effectively increase stack size by one.
• INST_SWAP
  • swap
  • swap the current top of the stack to the variable relative to the top of the stack, does not change stack size.

inst for i64

• INST_ADD_I
  • addi
  • add the top of the stack to the second top of the stack as integers, effectively decrease stack size by one.
• INST_SUB_I
  • subi
  • subtract the top of the stack from the second top of the stack as integers, effectively decrease stack size by one.
• INST_MUL_I
  • muli
  • multiply the top of the stack to the second top of the stack as integers, effectively decrease stack size by one.
• INST_DIV_I
  • divi
  • divide the top of the stack from the second top of the stack as integers, effectively decrease stack size by one.
• INST_MOD_I
  • modi
  • modulo the top of the stack from the second top of the stack as integers, effectively decrease stack size by one.

inst for u64

• INST_ADD_U
  • addu
• INST_SUB_U
  • subu
• INST_MUL_U
  • mulu
• INST_DIV_U
  • divu

inst for f64

• INST_ADD_F
  • addf
• INST_SUB_F
  • subf
• INST_MUL_F
  • mulf
• INST_DIV_F
  • divf

inst for comparsion

• INST_CMP_I
  • cmpi
• INST_CMP_U
  • cmpu
• INST_CMP_F
  • cmpf

inst for condition

• INST_AND
  • and
• INST_OR
  • or
• INST_NOT
  • not

inst for conversion

• INST_I_TO_U
  • i2u
• INST_I_TO_F
  • i2f
• INST_U_TO_I
  • u2i
• INST_U_TO_F
  • u2f
• INST_F_TO_I
  • f2i
• INST_F_TO_U
  • f2u

inst for jump

• INST_JMP
  • jmp
• INST_JMP_E
  • je
• INST_JMP_NE
  • jne
• INST_JMP_G
  • jg
• INST_JMP_L
  • jl
• INST_JMP_GE
  • jge
• INST_JMP_LE
  • jle

function calls

• INST_CALL
  • call
• INST_RET
  • ret

native calls

• INST_NATIVE
  • native
  • For FFI calls, build dynamically library linking to ljvm.
  • You should build wrapper function for the vm to work properly, function prototype should be trap_type foo( vm_t* vm );.
  • You should use trap_type vm_stack_push( vm_t* vm, word_t word ); to push data onto the vm.
  • And trap_type vm_stack_pop( vm_t* vm, word_t* word ); to pop data from the vm.

HALT

• INST_HALT
  • halt