The problem of assembly language.
void CAssembly::initialise(code_generation_target *cgt) { METHOD_ADD(cgt, ASSEMBLY_MTID, CAssembly::assembly); } void CAssembly::initialise_data(code_generation *gen) { } void CAssembly::begin(code_generation *gen) { CAssembly::initialise_data(gen); } void CAssembly::end(code_generation *gen) { }
i7val i7_mgl_sp = 0; #define I7_ASM_STACK_CAPACITY 128 i7val i7_asm_stack[I7_ASM_STACK_CAPACITY]; int i7_asm_stack_pointer = 0; i7val i7_pull(void) { if (i7_asm_stack_pointer <= 0) { printf("Stack underflow\n"); return (i7val) 0; } return i7_asm_stack[--i7_asm_stack_pointer]; } void i7_push(i7val x) { if (i7_asm_stack_pointer >= I7_ASM_STACK_CAPACITY) { printf("Stack overflow\n"); return; } i7_asm_stack[i7_asm_stack_pointer++] = x; }
- This is part of the extract file inform7_clib.h.
void CAssembly::assembly(code_generation_target *cgt, code_generation *gen, text_stream *opcode, int operand_count, inter_tree_node **operands, inter_tree_node *label, int label_sense) { text_stream *OUT = CodeGen::current(gen); int vararg_operands_from = 0, vararg_operands_to = 0; int store_this_operand[MAX_OPERANDS_IN_INTER_ASSEMBLY]; for (int i=0; i<16; i++) store_this_operand[i] = FALSE; int pushed_result = FALSE; if (Str::eq(opcode, I"@return")) WRITE("return "); else { if (label_sense != NOT_APPLICABLE) WRITE("if ("); CNamespace::mangle_opcode(cgt, OUT, opcode); } WRITE("("); if (Str::eq(opcode, I"@acos")) store_this_operand[2] = TRUE; if (Str::eq(opcode, I"@add")) store_this_operand[3] = TRUE; if (Str::eq(opcode, I"@aload")) store_this_operand[3] = TRUE; if (Str::eq(opcode, I"@aloadb")) store_this_operand[3] = TRUE; if (Str::eq(opcode, I"@aloads")) store_this_operand[3] = TRUE; if (Str::eq(opcode, I"@asin")) store_this_operand[2] = TRUE; if (Str::eq(opcode, I"@atan")) store_this_operand[2] = TRUE; if (Str::eq(opcode, I"@binarysearch")) store_this_operand[8] = TRUE; if (Str::eq(opcode, I"@ceil")) store_this_operand[2] = TRUE; if (Str::eq(opcode, I"@cos")) store_this_operand[2] = TRUE; if (Str::eq(opcode, I"@div")) store_this_operand[3] = TRUE; if (Str::eq(opcode, I"@exp")) store_this_operand[2] = TRUE; if (Str::eq(opcode, I"@fadd")) store_this_operand[3] = TRUE; if (Str::eq(opcode, I"@fdiv")) store_this_operand[3] = TRUE; if (Str::eq(opcode, I"@floor")) store_this_operand[2] = TRUE; if (Str::eq(opcode, I"@fmod")) { store_this_operand[3] = TRUE; store_this_operand[4] = TRUE; } if (Str::eq(opcode, I"@fmul")) store_this_operand[3] = TRUE; if (Str::eq(opcode, I"@fsub")) store_this_operand[3] = TRUE; if (Str::eq(opcode, I"@ftonumn")) store_this_operand[2] = TRUE; if (Str::eq(opcode, I"@ftonumz")) store_this_operand[2] = TRUE; if (Str::eq(opcode, I"@gestalt")) store_this_operand[3] = TRUE; if (Str::eq(opcode, I"@glk")) { store_this_operand[3] = TRUE; vararg_operands_from = 2; vararg_operands_to = operand_count-1; } if (Str::eq(opcode, I"@log")) store_this_operand[2] = TRUE; if (Str::eq(opcode, I"@mod")) store_this_operand[3] = TRUE; if (Str::eq(opcode, I"@mul")) store_this_operand[3] = TRUE; if (Str::eq(opcode, I"@neg")) store_this_operand[2] = TRUE; if (Str::eq(opcode, I"@numtof")) store_this_operand[2] = TRUE; if (Str::eq(opcode, I"@pow")) store_this_operand[3] = TRUE; if (Str::eq(opcode, I"@shiftl")) store_this_operand[3] = TRUE; if (Str::eq(opcode, I"@sin")) store_this_operand[2] = TRUE; if (Str::eq(opcode, I"@sqrt")) store_this_operand[2] = TRUE; if (Str::eq(opcode, I"@sub")) store_this_operand[3] = TRUE; if (Str::eq(opcode, I"@tan")) store_this_operand[2] = TRUE; for (int opc = 1; opc <= operand_count; opc++) { if (opc > 1) WRITE(", "); TEMPORARY_TEXT(write_to) CodeGen::select_temporary(gen, write_to); CodeGen::FC::frame(gen, operands[opc-1]); CodeGen::deselect_temporary(gen); if (opc == vararg_operands_from) WRITE(" i7_mgl_local__vararg_count, i7_mgl__varargs "); else { if (store_this_operand[opc]) { if (Str::eq(write_to, I"i7_mgl_sp")) { WRITE("&%S", write_to); pushed_result = TRUE; } else if (Str::eq(write_to, I"0")) WRITE("NULL"); else WRITE("&%S", write_to); } else { if (Str::eq(write_to, I"i7_mgl_sp")) { WRITE("i7_pull()"); } else WRITE("%S", write_to); } } if (opc == vararg_operands_to) { for (int x = 0; x < 10 - (vararg_operands_to - vararg_operands_from + 1); x++) WRITE(", 0"); WRITE(" } "); } DISCARD_TEXT(write_to) } WRITE(")"); if (label_sense != NOT_APPLICABLE) { if (label_sense == FALSE) WRITE(" == FALSE"); WRITE(") goto "); if (label == NULL) internal_error("no branch label"); CodeGen::FC::frame(gen, label); } if (pushed_result) WRITE("; i7_push(i7_mgl_sp)"); }
void glulx_accelfunc(i7val x, i7val y) { printf("Unimplemented: glulx_accelfunc.\n"); } void glulx_accelparam(i7val x, i7val y) { printf("Unimplemented: glulx_accelparam.\n"); } void glulx_call(i7val x, i7val i7varargc, i7val z) { printf("Unimplemented: glulx_call.\n"); } void glulx_copy(i7val x, i7val y) { printf("Unimplemented: glulx_copy.\n"); } void glulx_gestalt(i7val x, i7val y, i7val *z) { *z = 1; } int glulx_jeq(i7val x, i7val y) { if (x == y) return 1; return 0; } int glulx_jleu(i7val x, i7val y) { i7uval ux, uy; *((i7val *) &ux) = x; *((i7val *) &uy) = y; if (ux <= uy) return 1; return 0; } int glulx_jnz(i7val x) { if (x != 0) return 1; return 0; } int glulx_jz(i7val x) { if (x == 0) return 1; return 0; } void glulx_malloc(i7val x, i7val y) { printf("Unimplemented: glulx_malloc.\n"); } void glulx_mcopy(i7val x, i7val y, i7val z) { printf("Unimplemented: glulx_mcopy.\n"); } void glulx_mfree(i7val x) { printf("Unimplemented: glulx_mfree.\n"); } void glulx_quit(void) { printf("Unimplemented: glulx_quit.\n"); } void glulx_random(i7val x, i7val y) { printf("Unimplemented: glulx_random.\n"); } void glulx_setiosys(i7val x, i7val y) { // Deliberately ignored: we are using stdout, not glk } void i7_print_char(i7val x); void glulx_streamchar(i7val x) { i7_print_char(x); } void i7_print_decimal(i7val x); void glulx_streamnum(i7val x) { i7_print_decimal(x); } void glulx_streamstr(i7val x) { printf("Unimplemented: glulx_streamstr.\n"); } void glulx_streamunichar(i7val x) { i7_print_char(x); } void glulx_ushiftr(i7val x, i7val y, i7val z) { printf("Unimplemented: glulx_ushiftr.\n"); } void glulx_aload(i7val x, i7val y, i7val *z) { printf("Unimplemented: glulx_aload\n"); } void glulx_aloadb(i7val x, i7val y, i7val *z) { printf("Unimplemented: glulx_aloadb\n"); } void glulx_aloads(i7val x, i7val y, i7val *z) { printf("Unimplemented: glulx_aloads\n"); } void glulx_binarysearch(i7val l1, i7val l2, i7val l3, i7val l4, i7val l5, i7val l6, i7val l7, i7val *s1) { printf("Unimplemented: glulx_binarysearch\n"); } void glulx_shiftl(i7val x, i7val y, i7val *z) { printf("Unimplemented: glulx_shiftl\n"); }
- This is part of the extract file inform7_clib.h.