From: Tom Musta <[email protected]> This patch adds support for the Store Quadword instruction in user mode. Prior to Power ISA 2.07, stq was legal only in privileged mode. Support for Little Endian mode is also new in ISA 2.07.
Signed-off-by: Tom Musta <[email protected]> Signed-off-by: Alexander Graf <[email protected]> --- target-ppc/translate.c | 39 +++++++++++++++++++++++---------------- 1 file changed, 23 insertions(+), 16 deletions(-) diff --git a/target-ppc/translate.c b/target-ppc/translate.c index 06372b9..72eff90 100644 --- a/target-ppc/translate.c +++ b/target-ppc/translate.c @@ -2995,34 +2995,41 @@ static void gen_std(DisasContext *ctx) TCGv EA; rs = rS(ctx->opcode); - if ((ctx->opcode & 0x3) == 0x2) { -#if defined(CONFIG_USER_ONLY) - gen_inval_exception(ctx, POWERPC_EXCP_PRIV_OPC); -#else - /* stq */ - if (unlikely(ctx->mem_idx == 0)) { + if ((ctx->opcode & 0x3) == 0x2) { /* stq */ + + bool legal_in_user_mode = (ctx->insns_flags2 & PPC2_LSQ_ISA207) != 0; + bool le_is_supported = (ctx->insns_flags2 & PPC2_LSQ_ISA207) != 0; + + if (!legal_in_user_mode && is_user_mode(ctx)) { gen_inval_exception(ctx, POWERPC_EXCP_PRIV_OPC); return; } - if (unlikely(rs & 1)) { - gen_inval_exception(ctx, POWERPC_EXCP_INVAL_INVAL); + + if (!le_is_supported && ctx->le_mode) { + gen_exception_err(ctx, POWERPC_EXCP_ALIGN, POWERPC_EXCP_ALIGN_LE); return; } - if (unlikely(ctx->le_mode)) { - /* Little-endian mode is not handled */ - gen_exception_err(ctx, POWERPC_EXCP_ALIGN, POWERPC_EXCP_ALIGN_LE); + + if (unlikely(rs & 1)) { + gen_inval_exception(ctx, POWERPC_EXCP_INVAL_INVAL); return; } gen_set_access_type(ctx, ACCESS_INT); EA = tcg_temp_new(); gen_addr_imm_index(ctx, EA, 0x03); - gen_qemu_st64(ctx, cpu_gpr[rs], EA); - gen_addr_add(ctx, EA, EA, 8); - gen_qemu_st64(ctx, cpu_gpr[rs+1], EA); + + if (unlikely(ctx->le_mode)) { + gen_qemu_st64(ctx, cpu_gpr[rs+1], EA); + gen_addr_add(ctx, EA, EA, 8); + gen_qemu_st64(ctx, cpu_gpr[rs], EA); + } else { + gen_qemu_st64(ctx, cpu_gpr[rs], EA); + gen_addr_add(ctx, EA, EA, 8); + gen_qemu_st64(ctx, cpu_gpr[rs+1], EA); + } tcg_temp_free(EA); -#endif } else { - /* std / stdu */ + /* std / stdu*/ if (Rc(ctx->opcode)) { if (unlikely(rA(ctx->opcode) == 0)) { gen_inval_exception(ctx, POWERPC_EXCP_INVAL_INVAL); -- 1.8.1.4
