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#include <stdio.h>
#include <string.h>
#include <libmcpu.h>
#include "../utils/mcpu-asm.h"
#define CHECK(c,m) do{if(!(c)){fprintf(stderr,"FAIL: %s\n",m);return 1;}}while(0)
static const char leaf_src[]=
".text\n"
" CALL leaf\n"
" HALT\n"
"leaf:\n"
" RET\n";
static const char add_src[]=
".text\n"
" LDI r64@0x00000, 11\n"
" LDI r64@0x00008, 22\n"
" PUSH r64@0x00008\n"
" PUSH r64@0x00000\n"
" CALL add2\n"
" ADJSP 16\n"
" MOV r64@0x00010, r64@0x7fff8\n"
" HALT\n"
"add2:\n"
" LDSP r64@0x00100, 8\n"
" LDSP r64@0x00108, 16\n"
" IADD r64@0x7fff8, r64@0x00100, r64@0x00108\n"
" RET\n";
int
main( void )
{
cpu_asm_image im;
cpu_register rr;
mpu_int64_t thirty_three;
__mpu_uint64_t saved_pc;
__mpu_uint32_t psw;
char err[256];
unsigned int widths[] =
{
8, 16, 32, 64, 4096, 65536
};
size_t k;
__cpu_init();
CHECK( CPU_RETURN_AREA_BEGIN == 0x0007e000U, "return area begin" );
CHECK( CPU_RETURN_AREA_END == 0x00080000U, "return area end" );
CHECK( CPU_RETURN_AREA_SIZE == 0x00002000U, "return area size" );
for( k = 0; k < sizeof( widths ) / sizeof( widths[0] ); k++ )
{
__mpu_size_t n = __cpu_reg_size( widths[k] );
CHECK( __cpu_return_reg( &rr, widths[k] ) == 0, "canonical return register" );
CHECK( rr.bits == widths[k], "return register width" );
CHECK( rr.address == CPU_RETURN_AREA_END - (unsigned)n, "return register address formula" );
}
CHECK( __cpu_return_reg( &rr, 7 ) != 0, "reject invalid return width" );
CHECK( cpu_assemble_text( leaf_src, &im, err, sizeof( err ) ) == 0, err );
CHECK( __cpu_program_set( im.code, im.code_size ) == 0, "leaf program set" );
CHECK( __cpu_stack_alloc( 64 ) == 0, "leaf stack alloc" );
__cpu_pc = 0;
__cpu_set_psw( PSW_CF_MASK | PSW_TF_MASK );
psw = __cpu_get_psw();
CHECK( __cpu_step() == CPU_EXEC_SUCCESS, "CALL step" );
CHECK( __cpu_pc == 12, "CALL target" );
CHECK( __cpu_sp == 56, "CALL pushed 8-byte return address" );
memcpy( &saved_pc, __cpu_stack_ptr() + __cpu_sp, 8 );
CHECK( saved_pc == 10, "CALL stored next PC" );
CHECK( __cpu_get_psw() == psw, "CALL preserves PSW" );
CHECK( __cpu_step() == CPU_EXEC_SUCCESS, "RET step" );
CHECK( __cpu_pc == 10, "RET restored PC" );
CHECK( __cpu_sp == 64, "RET popped return address" );
CHECK( __cpu_get_psw() == psw, "RET preserves PSW" );
cpu_asm_image_free( &im );
__cpu_program_free();
__cpu_stack_free();
memset( __cpu_registers, 0, CPU_REGISTERS_MEM_SIZE_IN_UNITS );
__cpu_clear_psw();
CHECK( cpu_assemble_text( add_src, &im, err, sizeof( err ) ) == 0, err );
CHECK( __cpu_program_set( im.code, im.code_size ) == 0, "add program set" );
CHECK( __cpu_stack_alloc( 128 ) == 0, "add stack alloc" );
__cpu_pc = 0;
CHECK( __cpu_run() == CPU_EXEC_SUCCESS, "CALL ABI run" );
CHECK( __cpu_sp == 128, "caller cleanup restored empty SP" );
iatoi( ( mpu_int * ) thirty_three, (__mpu_char8_t *)"33", NB_I64 );
CHECK( !memcmp( __cpu_reg_ptr( 64, 0x7fff8 ), thirty_three, NB_I64 ), "return value area result" );
CHECK( !memcmp( __cpu_reg_ptr( 64, 0x00010 ), thirty_three, NB_I64 ), "caller copied return value" );
cpu_asm_image_free( &im );
__cpu_free_context();
puts( "libcpu CALL ABI regression: PASS" );
return( 0 );
}
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