powerpc/sstep: Add tests for setb instruction

This adds selftests for setb instruction.

Signed-off-by: Sathvika Vasireddy <sathvika@linux.vnet.ibm.com>
Tested-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/b05b61ccb5f10279d46fed490796f32ea2ccc270.1620727160.git.sathvika@linux.vnet.ibm.com

diff --git a/arch/powerpc/include/asm/ppc-opcode.h b/arch/powerpc/include/asm/ppc-opcode.h
index ac41776661e96300f5f2d66c1094f9800db2eb63..927551dd870b5b00a77406ffe86660209557a08a 100644 (file)
--- a/arch/powerpc/include/asm/ppc-opcode.h
+++ b/arch/powerpc/include/asm/ppc-opcode.h
@@ -245,6 +245,7 @@
 #define PPC_INST_STRING                        0x7c00042a
 #define PPC_INST_STRING_MASK           0xfc0007fe
 #define PPC_INST_STRING_GEN_MASK       0xfc00067e
+#define PPC_INST_SETB                  0x7c000100
 #define PPC_INST_STSWI                 0x7c0005aa
 #define PPC_INST_STSWX                 0x7c00052a
 #define PPC_INST_TRECHKPT              0x7c0007dd

diff --git a/arch/powerpc/lib/test_emulate_step.c b/arch/powerpc/lib/test_emulate_step.c
index 783d1b85ecfe3fd7055d3d2323004e3d99dcbb59..a0a52fe5e979647bce849b43395b6e3c26e17b15 100644 (file)
--- a/arch/powerpc/lib/test_emulate_step.c
+++ b/arch/powerpc/lib/test_emulate_step.c
@@ -53,6 +53,8 @@
        ppc_inst_prefix(PPC_PREFIX_MLS | __PPC_PRFX_R(pr) | IMM_H(i), \
                        PPC_RAW_ADDI(t, a, i))
 
+#define TEST_SETB(t, bfa)       ppc_inst(PPC_INST_SETB | ___PPC_RT(t) | ___PPC_RA((bfa & 0x7) << 2))
+
 
 static void __init init_pt_regs(struct pt_regs *regs)
 {
@@ -929,6 +931,33 @@ static struct compute_test compute_tests[] = {
                        }
                }
        },
+       {
+               .mnemonic = "setb",
+               .cpu_feature = CPU_FTR_ARCH_300,
+               .subtests = {
+                       {
+                               .descr = "BFA = 1, CR = GT",
+                               .instr = TEST_SETB(20, 1),
+                               .regs = {
+                                       .ccr = 0x4000000,
+                               }
+                       },
+                       {
+                               .descr = "BFA = 4, CR = LT",
+                               .instr = TEST_SETB(20, 4),
+                               .regs = {
+                                       .ccr = 0x8000,
+                               }
+                       },
+                       {
+                               .descr = "BFA = 5, CR = EQ",
+                               .instr = TEST_SETB(20, 5),
+                               .regs = {
+                                       .ccr = 0x200,
+                               }
+                       }
+               }
+       },
        {
                .mnemonic = "add",
                .subtests = {