This patch adds the Load Quadword and Reserve (lqarx) instruction,
which is new in Power ISA 2.07.
Signed-off-by: Tom Musta <tommu...@gmail.com>
---
target-ppc/translate.c | 34 ++++++++++++++++++++++++++++++++++
1 files changed, 34 insertions(+), 0 deletions(-)
diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index bb1dc82..589cee9 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -3361,6 +3361,39 @@ STCX(stwcx_, 4);
/* ldarx */
LARX(ldarx, 8, ld64);
+/* lqarx */
+static void gen_lqarx(DisasContext *ctx)
+{
+ TCGv EA;
+ int rd = rD(ctx->opcode);
+ TCGv gpr1, gpr2;
+
+ if (unlikely((rd & 1) || (rd == rA(ctx->opcode)) ||
+ (rd == rB(ctx->opcode)))) {
+ gen_inval_exception(ctx, POWERPC_EXCP_INVAL_INVAL);
+ return;
+ }
+
+ gen_set_access_type(ctx, ACCESS_RES);
+ EA = tcg_temp_local_new();
+ gen_addr_reg_index(ctx, EA);
+ gen_check_align(ctx, EA, 15);
+ if (unlikely(ctx->le_mode)) {
+ gpr1 = cpu_gpr[rd+1];
+ gpr2 = cpu_gpr[rd];
+ } else {
+ gpr1 = cpu_gpr[rd];
+ gpr2 = cpu_gpr[rd+1];
+ }
+ gen_qemu_ld64(ctx, gpr1, EA);
+ tcg_gen_mov_tl(cpu_reserve, EA);
+ tcg_gen_st_tl(gpr1, cpu_env, offsetof(CPUPPCState, reserve_val));
+
+ gen_addr_add(ctx, EA, EA, 8);
+ gen_qemu_ld64(ctx, gpr2, EA);
+ tcg_temp_free(EA);
+}
+
/* stdcx. */
STCX(stdcx_, 8);
#endif /* defined(TARGET_PPC64) */
@@ -9568,6 +9601,7 @@ 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(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),
#endif
GEN_HANDLER(sync, 0x1F, 0x16, 0x12, 0x039FF801, PPC_MEM_SYNC),
--
1.7.1
