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target-ppc: Add Load Quadword and Reserve 

This patch adds the Load Quadword and Reserve (lqarx) instruction,
which is new in Power ISA 2.07.

Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Tom Musta 2014-02-10 11:27:00 -06:00 committed by Alexander Graf
parent 84cab1e2f5
commit 9c294d5ab3
2 changed files with 38 additions and 0 deletions
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1
target-ppc/cpu.h
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@ -926,6 +926,7 @@ struct CPUPPCState {
target_ulong reserve_addr;
/* Reservation value */
target_ulong reserve_val;
target_ulong reserve_val2;
/* Reservation store address */
target_ulong reserve_ea;
/* Reserved store source register and size */

37
target-ppc/translate.c
View File

@ -3359,6 +3359,42 @@ 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);
gen_addr_add(ctx, EA, EA, 8);
gen_qemu_ld64(ctx, gpr2, EA);
tcg_gen_st_tl(gpr1, cpu_env, offsetof(CPUPPCState, reserve_val));
tcg_gen_st_tl(gpr2, cpu_env, offsetof(CPUPPCState, reserve_val2));
tcg_temp_free(EA);
}
/* stdcx. */
STCX(stdcx_, 8);
#endif /* defined(TARGET_PPC64) */
@ -9623,6 +9659,7 @@ 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),