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[Qemu-devel] [PATCH v1 2/2] target-ppc: implement store atomic instructi
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From: |
Nikunj A Dadhania |
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Subject: |
[Qemu-devel] [PATCH v1 2/2] target-ppc: implement store atomic instruction |
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Date: |
Thu, 9 Feb 2017 11:03:31 +0530 |
From: Balamuruhan S <address@hidden>
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 <address@hidden>
Signed-off-by: Harish S <address@hidden>
Signed-off-by: Athira Rajeev <address@hidden>
[ implement stdat, use macro and combine both implementation ]
Signed-off-by: Nikunj A Dadhania <address@hidden>
---
target/ppc/translate.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 52 insertions(+)
diff --git a/target/ppc/translate.c b/target/ppc/translate.c
index ea2ec44..255735a 100644
--- a/target/ppc/translate.c
+++ b/target/ppc/translate.c
@@ -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),
--
2.7.4