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target-ppc: implement store atomic instruction 

stwat: Store Word Atomic
stdat: Store Doubleword Atomic

The instruction includes as function code (5 bits) which gives a detail
on the operation to be performed. The patch implements five such
functions.

Signed-off-by: Balamuruhan S <bala24@linux.vnet.ibm.com>
Signed-off-by: Harish S <harisrir@linux.vnet.ibm.com>
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
[ implement stdat, use macro and combine both implementation ]
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Balamuruhan S 2017-02-09 11:03:31 +05:30 committed by David Gibson
parent a68a614673
commit a34011881c
1 changed files with 52 additions and 0 deletions
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52
target/ppc/translate.c
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@ -3033,6 +3033,56 @@ LD_ATOMIC(lwat, DEF_MEMOP(MO_UL), i32, trunc_tl_i32, extu_i32_tl)
LD_ATOMIC(ldat, DEF_MEMOP(MO_Q), i64, mov_i64, mov_i64)
#endif
#define ST_ATOMIC(name, memop, tp, op) \
static void gen_##name(DisasContext *ctx) \
{ \
int len = MEMOP_GET_SIZE(memop); \
uint32_t gpr_FC = FC(ctx->opcode); \
TCGv EA = tcg_temp_local_new(); \
TCGv_##tp t0, t1; \
\
gen_addr_register(ctx, EA); \
if (len > 1) { \
gen_check_align(ctx, EA, len - 1); \
} \
t0 = tcg_temp_new_##tp(); \
t1 = tcg_temp_new_##tp(); \
tcg_gen_##op(t0, cpu_gpr[rD(ctx->opcode) + 1]); \
\
switch (gpr_FC) { \
case 0: /* add and Store */ \
tcg_gen_atomic_add_fetch_##tp(t1, EA, t0, ctx->mem_idx, memop); \
break; \
case 1: /* xor and Store */ \
tcg_gen_atomic_xor_fetch_##tp(t1, EA, t0, ctx->mem_idx, memop); \
break; \
case 2: /* Or and Store */ \
tcg_gen_atomic_or_fetch_##tp(t1, EA, t0, ctx->mem_idx, memop); \
break; \
case 3: /* 'and' and Store */ \
tcg_gen_atomic_and_fetch_##tp(t1, EA, t0, ctx->mem_idx, memop); \
break; \
case 4: /* Store max unsigned */ \
case 5: /* Store max signed */ \
case 6: /* Store min unsigned */ \
case 7: /* Store min signed */ \
case 24: /* Store twin */ \
gen_invalid(ctx); \
break; \
default: \
/* invoke data storage error handler */ \
gen_exception_err(ctx, POWERPC_EXCP_DSI, POWERPC_EXCP_INVAL); \
} \
tcg_temp_free_##tp(t0); \
tcg_temp_free_##tp(t1); \
tcg_temp_free(EA); \
}
ST_ATOMIC(stwat, DEF_MEMOP(MO_UL), i32, trunc_tl_i32)
#if defined(TARGET_PPC64)
ST_ATOMIC(stdat, DEF_MEMOP(MO_Q), i64, mov_i64)
#endif
#if defined(CONFIG_USER_ONLY)
static void gen_conditional_store(DisasContext *ctx, TCGv EA,
int reg, int memop)
@ -6288,11 +6338,13 @@ GEN_HANDLER_E(lbarx, 0x1F, 0x14, 0x01, 0, PPC_NONE, PPC2_ATOMIC_ISA206),
GEN_HANDLER_E(lharx, 0x1F, 0x14, 0x03, 0, PPC_NONE, PPC2_ATOMIC_ISA206),
GEN_HANDLER(lwarx, 0x1F, 0x14, 0x00, 0x00000000, PPC_RES),
GEN_HANDLER_E(lwat, 0x1F, 0x06, 0x12, 0x00000001, PPC_NONE, PPC2_ISA300),
GEN_HANDLER_E(stwat, 0x1F, 0x06, 0x16, 0x00000001, PPC_NONE, PPC2_ISA300),
GEN_HANDLER_E(stbcx_, 0x1F, 0x16, 0x15, 0, PPC_NONE, PPC2_ATOMIC_ISA206),
GEN_HANDLER_E(sthcx_, 0x1F, 0x16, 0x16, 0, PPC_NONE, PPC2_ATOMIC_ISA206),
GEN_HANDLER2(stwcx_, "stwcx.", 0x1F, 0x16, 0x04, 0x00000000, PPC_RES),
#if defined(TARGET_PPC64)
GEN_HANDLER_E(ldat, 0x1F, 0x06, 0x13, 0x00000001, PPC_NONE, PPC2_ISA300),
GEN_HANDLER_E(stdat, 0x1F, 0x06, 0x17, 0x00000001, PPC_NONE, PPC2_ISA300),
GEN_HANDLER(ldarx, 0x1F, 0x14, 0x02, 0x00000000, PPC_64B),
GEN_HANDLER_E(lqarx, 0x1F, 0x14, 0x08, 0, PPC_NONE, PPC2_LSQ_ISA207),
GEN_HANDLER2(stdcx_, "stdcx.", 0x1F, 0x16, 0x06, 0x00000000, PPC_64B),