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validity: add basic signed integer arithmetic tests to core validation [Alex Jackson]

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This commit is contained in:
Alex W. Jackson 2015-06-26 12:45:18 -04:00
parent 382dd0f616
commit 91be2c989e
1 changed files with 12 additions and 0 deletions
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12
src/emu/validity.c
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@ -326,6 +326,8 @@ void validity_checker::validate_one(const game_driver &driver)
void validity_checker::validate_core()
{
// basic system checks
if (~0 != -1) osd_printf_error("Machine must be two's complement\n");
UINT8 a = 0xff;
UINT8 b = a + 1;
if (b > a) osd_printf_error("UINT8 must be 8 bits\n");
@ -340,6 +342,16 @@ void validity_checker::validate_core()
if (sizeof(INT64) != 8) osd_printf_error("INT64 must be 64 bits\n");
if (sizeof(UINT64) != 8) osd_printf_error("UINT64 must be 64 bits\n");
// check signed right shift
INT8 a8 = -3;
INT16 a16 = -3;
INT32 a32 = -3;
INT64 a64 = -3;
if (a8 >> 1 != -2) osd_printf_error("INT8 right shift must be arithmetic\n");
if (a16 >> 1 != -2) osd_printf_error("INT16 right shift must be arithmetic\n");
if (a32 >> 1 != -2) osd_printf_error("INT32 right shift must be arithmetic\n");
if (a64 >> 1 != -2) osd_printf_error("INT64 right shift must be arithmetic\n");
// check pointer size
#ifdef PTR64
if (sizeof(void *) != 8) osd_printf_error("PTR64 flag enabled, but was compiled for 32-bit target\n");