Commit b859c95c authored by Balamuruhan S's avatar Balamuruhan S Committed by Michael Ellerman
Browse files

powerpc/test_emulate_step: Add testcases for divde[.] and divdeu[.] instructions 



Add testcases for divde, divde., divdeu, divdeu. emulated instructions
to cover few scenarios,
  - with same dividend and divisor to have undefine RT
    for divdeu[.]
  - with divide by zero to have undefine RT for both
    divde[.] and divdeu[.]
  - with negative dividend to cover -|divisor| < r <= 0 if
    the dividend is negative for divde[.]
  - normal case with proper dividend and divisor for both
    divde[.] and divdeu[.]

Signed-off-by: default avatarBalamuruhan S <bala24@linux.ibm.com>
Reviewed-by: default avatarSandipan Das <sandipan@linux.ibm.com>
Acked-by: default avatarNaveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200728130308.1790982-4-bala24@linux.ibm.com
parent 151c32bf

arch/powerpc/lib/test_emulate_step.c

+156 −0
Original line number Diff line number Diff line
@@ -1019,6 +1019,162 @@ static struct compute_test compute_tests[] = { 
			}

		}

	},

	{

		.mnemonic = "divde",

		.subtests = {

			{

				.descr = "RA = LONG_MIN, RB = LONG_MIN",

				.instr = ppc_inst(PPC_RAW_DIVDE(20, 21, 22)),

				.regs = {

					.gpr[21] = LONG_MIN,

					.gpr[22] = LONG_MIN,

				}

			},

			{

				.descr = "RA = 1L, RB = 0",

				.instr = ppc_inst(PPC_RAW_DIVDE(20, 21, 22)),

				.flags = IGNORE_GPR(20),

				.regs = {

					.gpr[21] = 1L,

					.gpr[22] = 0,

				}

			},

			{

				.descr = "RA = LONG_MIN, RB = LONG_MAX",

				.instr = ppc_inst(PPC_RAW_DIVDE(20, 21, 22)),

				.regs = {

					.gpr[21] = LONG_MIN,

					.gpr[22] = LONG_MAX,

				}

			}

		}

	},

	{

		.mnemonic = "divde.",

		.subtests = {

			{

				.descr = "RA = LONG_MIN, RB = LONG_MIN",

				.instr = ppc_inst(PPC_RAW_DIVDE_DOT(20, 21, 22)),

				.regs = {

					.gpr[21] = LONG_MIN,

					.gpr[22] = LONG_MIN,

				}

			},

			{

				.descr = "RA = 1L, RB = 0",

				.instr = ppc_inst(PPC_RAW_DIVDE_DOT(20, 21, 22)),

				.flags = IGNORE_GPR(20),

				.regs = {

					.gpr[21] = 1L,

					.gpr[22] = 0,

				}

			},

			{

				.descr = "RA = LONG_MIN, RB = LONG_MAX",

				.instr = ppc_inst(PPC_RAW_DIVDE_DOT(20, 21, 22)),

				.regs = {

					.gpr[21] = LONG_MIN,

					.gpr[22] = LONG_MAX,

				}

			}

		}

	},

	{

		.mnemonic = "divdeu",

		.subtests = {

			{

				.descr = "RA = LONG_MIN, RB = LONG_MIN",

				.instr = ppc_inst(PPC_RAW_DIVDEU(20, 21, 22)),

				.flags = IGNORE_GPR(20),

				.regs = {

					.gpr[21] = LONG_MIN,

					.gpr[22] = LONG_MIN,

				}

			},

			{

				.descr = "RA = 1L, RB = 0",

				.instr = ppc_inst(PPC_RAW_DIVDEU(20, 21, 22)),

				.flags = IGNORE_GPR(20),

				.regs = {

					.gpr[21] = 1L,

					.gpr[22] = 0,

				}

			},

			{

				.descr = "RA = LONG_MIN, RB = LONG_MAX",

				.instr = ppc_inst(PPC_RAW_DIVDEU(20, 21, 22)),

				.regs = {

					.gpr[21] = LONG_MIN,

					.gpr[22] = LONG_MAX,

				}

			},

			{

				.descr = "RA = LONG_MAX - 1, RB = LONG_MAX",

				.instr = ppc_inst(PPC_RAW_DIVDEU(20, 21, 22)),

				.regs = {

					.gpr[21] = LONG_MAX - 1,

					.gpr[22] = LONG_MAX,

				}

			},

			{

				.descr = "RA = LONG_MIN + 1, RB = LONG_MIN",

				.instr = ppc_inst(PPC_RAW_DIVDEU(20, 21, 22)),

				.flags = IGNORE_GPR(20),

				.regs = {

					.gpr[21] = LONG_MIN + 1,

					.gpr[22] = LONG_MIN,

				}

			}

		}

	},

	{

		.mnemonic = "divdeu.",

		.subtests = {

			{

				.descr = "RA = LONG_MIN, RB = LONG_MIN",

				.instr = ppc_inst(PPC_RAW_DIVDEU_DOT(20, 21, 22)),

				.flags = IGNORE_GPR(20),

				.regs = {

					.gpr[21] = LONG_MIN,

					.gpr[22] = LONG_MIN,

				}

			},

			{

				.descr = "RA = 1L, RB = 0",

				.instr = ppc_inst(PPC_RAW_DIVDEU_DOT(20, 21, 22)),

				.flags = IGNORE_GPR(20),

				.regs = {

					.gpr[21] = 1L,

					.gpr[22] = 0,

				}

			},

			{

				.descr = "RA = LONG_MIN, RB = LONG_MAX",

				.instr = ppc_inst(PPC_RAW_DIVDEU_DOT(20, 21, 22)),

				.regs = {

					.gpr[21] = LONG_MIN,

					.gpr[22] = LONG_MAX,

				}

			},

			{

				.descr = "RA = LONG_MAX - 1, RB = LONG_MAX",

				.instr = ppc_inst(PPC_RAW_DIVDEU_DOT(20, 21, 22)),

				.regs = {

					.gpr[21] = LONG_MAX - 1,

					.gpr[22] = LONG_MAX,

				}

			},

			{

				.descr = "RA = LONG_MIN + 1, RB = LONG_MIN",

				.instr = ppc_inst(PPC_RAW_DIVDEU_DOT(20, 21, 22)),

				.flags = IGNORE_GPR(20),

				.regs = {

					.gpr[21] = LONG_MIN + 1,

					.gpr[22] = LONG_MIN,

				}

			}

		}

	},

	{

		.mnemonic = "paddi",

		.cpu_feature = CPU_FTR_ARCH_31,