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powerpc/sstep: Add tests for prefixed floating-point load/stores

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Add tests for the prefixed versions of the floating-point load/stores
that are currently tested. This includes the following instructions:
  * Prefixed Load Floating-Point Single (plfs)
  * Prefixed Load Floating-Point Double (plfd)
  * Prefixed Store Floating-Point Single (pstfs)
  * Prefixed Store Floating-Point Double (pstfd)

Skip the new tests if ISA v3.10 is unsupported.

Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
[mpe: Fix conflicts with ppc-opcode.h changes]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200525025923.19843-2-jniethe5@gmail.com
This commit is contained in:
Jordan Niethe 2020-05-25 12:59:20 +10:00 committed by Michael Ellerman
parent b6b54b4272
commit 0396de6d85
2 changed files with 128 additions and 0 deletions
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4
arch/powerpc/include/asm/ppc-opcode.h
View File

@ -266,6 +266,10 @@
#define PPC_INST_BRANCH_COND 0x40800000
/* Prefixes */
#define PPC_INST_LFS 0xc0000000
#define PPC_INST_STFS 0xd0000000
#define PPC_INST_LFD 0xc8000000
#define PPC_INST_STFD 0xd8000000
#define PPC_PREFIX_MLS 0x06000000
#define PPC_PREFIX_8LS 0x04000000

124
arch/powerpc/lib/test_emulate_step.c
View File

@ -31,6 +31,22 @@
ppc_inst_prefix(PPC_PREFIX_8LS | __PPC_PRFX_R(pr) | IMM_H(i), \
PPC_INST_PSTD | ___PPC_RT(r) | ___PPC_RA(base) | IMM_L(i))
#define TEST_PLFS(r, base, i, pr) \
ppc_inst_prefix(PPC_PREFIX_MLS | __PPC_PRFX_R(pr) | IMM_H(i), \
PPC_INST_LFS | ___PPC_RT(r) | ___PPC_RA(base) | IMM_L(i))
#define TEST_PSTFS(r, base, i, pr) \
ppc_inst_prefix(PPC_PREFIX_MLS | __PPC_PRFX_R(pr) | IMM_H(i), \
PPC_INST_STFS | ___PPC_RT(r) | ___PPC_RA(base) | IMM_L(i))
#define TEST_PLFD(r, base, i, pr) \
ppc_inst_prefix(PPC_PREFIX_MLS | __PPC_PRFX_R(pr) | IMM_H(i), \
PPC_INST_LFD | ___PPC_RT(r) | ___PPC_RA(base) | IMM_L(i))
#define TEST_PSTFD(r, base, i, pr) \
ppc_inst_prefix(PPC_PREFIX_MLS | __PPC_PRFX_R(pr) | IMM_H(i), \
PPC_INST_STFD | ___PPC_RT(r) | ___PPC_RA(base) | IMM_L(i))
static void __init init_pt_regs(struct pt_regs *regs)
{
static unsigned long msr;
@ -304,6 +320,53 @@ static void __init test_lfsx_stfsx(void)
show_result("stfsx", "FAIL");
}
static void __init test_plfs_pstfs(void)
{
struct pt_regs regs;
union {
float a;
int b;
} c;
int cached_b;
int stepped = -1;
if (!cpu_has_feature(CPU_FTR_ARCH_31)) {
show_result("pld", "SKIP (!CPU_FTR_ARCH_31)");
return;
}
init_pt_regs(&regs);
/*** plfs ***/
c.a = 123.45;
cached_b = c.b;
regs.gpr[3] = (unsigned long)&c.a;
/* plfs frt10, 0(r3), 0 */
stepped = emulate_step(&regs, TEST_PLFS(10, 3, 0, 0));
if (stepped == 1)
show_result("plfs", "PASS");
else
show_result("plfs", "FAIL");
/*** pstfs ***/
c.a = 678.91;
/* pstfs frs10, 0(r3), 0 */
stepped = emulate_step(&regs, TEST_PSTFS(10, 3, 0, 0));
if (stepped == 1 && c.b == cached_b)
show_result("pstfs", "PASS");
else
show_result("pstfs", "FAIL");
}
static void __init test_lfdx_stfdx(void)
{
struct pt_regs regs;
@ -346,6 +409,53 @@ static void __init test_lfdx_stfdx(void)
else
show_result("stfdx", "FAIL");
}
static void __init test_plfd_pstfd(void)
{
struct pt_regs regs;
union {
double a;
long b;
} c;
long cached_b;
int stepped = -1;
if (!cpu_has_feature(CPU_FTR_ARCH_31)) {
show_result("pld", "SKIP (!CPU_FTR_ARCH_31)");
return;
}
init_pt_regs(&regs);
/*** plfd ***/
c.a = 123456.78;
cached_b = c.b;
regs.gpr[3] = (unsigned long)&c.a;
/* plfd frt10, 0(r3), 0 */
stepped = emulate_step(&regs, TEST_PLFD(10, 3, 0, 0));
if (stepped == 1)
show_result("plfd", "PASS");
else
show_result("plfd", "FAIL");
/*** pstfd ***/
c.a = 987654.32;
/* pstfd frs10, 0(r3), 0 */
stepped = emulate_step(&regs, TEST_PSTFD(10, 3, 0, 0));
if (stepped == 1 && c.b == cached_b)
show_result("pstfd", "PASS");
else
show_result("pstfd", "FAIL");
}
#else
static void __init test_lfsx_stfsx(void)
{
@ -353,11 +463,23 @@ static void __init test_lfsx_stfsx(void)
show_result("stfsx", "SKIP (CONFIG_PPC_FPU is not set)");
}
static void __init test_plfs_pstfs(void)
{
show_result("plfs", "SKIP (CONFIG_PPC_FPU is not set)");
show_result("pstfs", "SKIP (CONFIG_PPC_FPU is not set)");
}
static void __init test_lfdx_stfdx(void)
{
show_result("lfdx", "SKIP (CONFIG_PPC_FPU is not set)");
show_result("stfdx", "SKIP (CONFIG_PPC_FPU is not set)");
}
static void __init test_plfd_pstfd(void)
{
show_result("plfd", "SKIP (CONFIG_PPC_FPU is not set)");
show_result("pstfd", "SKIP (CONFIG_PPC_FPU is not set)");
}
#endif /* CONFIG_PPC_FPU */
#ifdef CONFIG_ALTIVEC
@ -494,7 +616,9 @@ static void __init run_tests_load_store(void)
test_pstd();
test_ldarx_stdcx();
test_lfsx_stfsx();
test_plfs_pstfs();
test_lfdx_stfdx();
test_plfd_pstfd();
test_lvx_stvx();
test_lxvd2x_stxvd2x();
}