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提交 ef24726e 编写于 作者: B Benjamin Herrenschmidt 提交者： David Gibson
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ppc: Don't update the NIP in floating point generated code 

This is no longer necessary as the helpers will properly retrieve
the return address.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
上级 44f35bd1
隐藏空白更改
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Showing with 0 addition and 34 deletion
target-ppc/translate/fp-impl.c
浏览文件 @ ef24726e
......@@ -38,8 +38,6 @@ static void gen_f##name(DisasContext *ctx) \
gen_exception(ctx, POWERPC_EXCP_FPU); \
return; \
} \
/* NIP cannot be restored if the memory exception comes from an helper */ \
gen_update_nip(ctx, ctx->nip - 4); \
gen_reset_fpstatus(); \
gen_helper_f##op(cpu_fpr[rD(ctx->opcode)], cpu_env, \
cpu_fpr[rA(ctx->opcode)], \
......@@ -67,8 +65,6 @@ static void gen_f##name(DisasContext *ctx) \
gen_exception(ctx, POWERPC_EXCP_FPU); \
return; \
} \
/* NIP cannot be restored if the memory exception comes from an helper */ \
gen_update_nip(ctx, ctx->nip - 4); \
gen_reset_fpstatus(); \
gen_helper_f##op(cpu_fpr[rD(ctx->opcode)], cpu_env, \
cpu_fpr[rA(ctx->opcode)], \
......@@ -95,8 +91,6 @@ static void gen_f##name(DisasContext *ctx) \
gen_exception(ctx, POWERPC_EXCP_FPU); \
return; \
} \
/* NIP cannot be restored if the memory exception comes from an helper */ \
gen_update_nip(ctx, ctx->nip - 4); \
gen_reset_fpstatus(); \
gen_helper_f##op(cpu_fpr[rD(ctx->opcode)], cpu_env, \
cpu_fpr[rA(ctx->opcode)], \
......@@ -123,8 +117,6 @@ static void gen_f##name(DisasContext *ctx) \
gen_exception(ctx, POWERPC_EXCP_FPU); \
return; \
} \
/* NIP cannot be restored if the memory exception comes from an helper */ \
gen_update_nip(ctx, ctx->nip - 4); \
gen_reset_fpstatus(); \
gen_helper_f##name(cpu_fpr[rD(ctx->opcode)], cpu_env, \
cpu_fpr[rB(ctx->opcode)]); \
......@@ -143,8 +135,6 @@ static void gen_f##name(DisasContext *ctx) \
gen_exception(ctx, POWERPC_EXCP_FPU); \
return; \
} \
/* NIP cannot be restored if the memory exception comes from an helper */ \
gen_update_nip(ctx, ctx->nip - 4); \
gen_reset_fpstatus(); \
gen_helper_f##name(cpu_fpr[rD(ctx->opcode)], cpu_env, \
cpu_fpr[rB(ctx->opcode)]); \
......@@ -179,8 +169,6 @@ static void gen_frsqrtes(DisasContext *ctx)
gen_exception(ctx, POWERPC_EXCP_FPU);
return;
}
/* NIP cannot be restored if the memory exception comes from an helper */
gen_update_nip(ctx, ctx->nip - 4);
gen_reset_fpstatus();
gen_helper_frsqrte(cpu_fpr[rD(ctx->opcode)], cpu_env,
cpu_fpr[rB(ctx->opcode)]);
......@@ -205,8 +193,6 @@ static void gen_fsqrt(DisasContext *ctx)
gen_exception(ctx, POWERPC_EXCP_FPU);
return;
}
/* NIP cannot be restored if the memory exception comes from an helper */
gen_update_nip(ctx, ctx->nip - 4);
gen_reset_fpstatus();
gen_helper_fsqrt(cpu_fpr[rD(ctx->opcode)], cpu_env,
cpu_fpr[rB(ctx->opcode)]);
......@@ -222,8 +208,6 @@ static void gen_fsqrts(DisasContext *ctx)
gen_exception(ctx, POWERPC_EXCP_FPU);
return;
}
/* NIP cannot be restored if the memory exception comes from an helper */
gen_update_nip(ctx, ctx->nip - 4);
gen_reset_fpstatus();
gen_helper_fsqrt(cpu_fpr[rD(ctx->opcode)], cpu_env,
cpu_fpr[rB(ctx->opcode)]);
......@@ -313,8 +297,6 @@ static void gen_fcmpo(DisasContext *ctx)
gen_exception(ctx, POWERPC_EXCP_FPU);
return;
}
/* NIP cannot be restored if the memory exception comes from an helper */
gen_update_nip(ctx, ctx->nip - 4);
gen_reset_fpstatus();
crf = tcg_const_i32(crfD(ctx->opcode));
gen_helper_fcmpo(cpu_env, cpu_fpr[rA(ctx->opcode)],
......@@ -331,8 +313,6 @@ static void gen_fcmpu(DisasContext *ctx)
gen_exception(ctx, POWERPC_EXCP_FPU);
return;
}
/* NIP cannot be restored if the memory exception comes from an helper */
gen_update_nip(ctx, ctx->nip - 4);
gen_reset_fpstatus();
crf = tcg_const_i32(crfD(ctx->opcode));
gen_helper_fcmpu(cpu_env, cpu_fpr[rA(ctx->opcode)],
......@@ -502,8 +482,6 @@ static void gen_mtfsb0(DisasContext *ctx)
gen_reset_fpstatus();
if (likely(crb != FPSCR_FEX && crb != FPSCR_VX)) {
TCGv_i32 t0;
/* NIP cannot be restored if the memory exception comes from an helper */
gen_update_nip(ctx, ctx->nip - 4);
t0 = tcg_const_i32(crb);
gen_helper_fpscr_clrbit(cpu_env, t0);
tcg_temp_free_i32(t0);
......@@ -528,8 +506,6 @@ static void gen_mtfsb1(DisasContext *ctx)
/* XXX: we pretend we can only do IEEE floating-point computations */
if (likely(crb != FPSCR_FEX && crb != FPSCR_VX && crb != FPSCR_NI)) {
TCGv_i32 t0;
/* NIP cannot be restored if the memory exception comes from an helper */
gen_update_nip(ctx, ctx->nip - 4);
t0 = tcg_const_i32(crb);
gen_helper_fpscr_setbit(cpu_env, t0);
tcg_temp_free_i32(t0);
......@@ -559,8 +535,6 @@ static void gen_mtfsf(DisasContext *ctx)
gen_inval_exception(ctx, POWERPC_EXCP_INVAL_INVAL);
return;
}
/* NIP cannot be restored if the memory exception comes from an helper */
gen_update_nip(ctx, ctx->nip - 4);
gen_reset_fpstatus();
if (l) {
t0 = tcg_const_i32((ctx->insns_flags2 & PPC2_ISA205) ? 0xffff : 0xff);
......@@ -595,8 +569,6 @@ static void gen_mtfsfi(DisasContext *ctx)
return;
}
sh = (8 * w) + 7 - bf;
/* NIP cannot be restored if the memory exception comes from an helper */
gen_update_nip(ctx, ctx->nip - 4);
gen_reset_fpstatus();
t0 = tcg_const_i64(((uint64_t)FPIMM(ctx->opcode)) << (4 * sh));
t1 = tcg_const_i32(1 << sh);
......
target-ppc/translate/vsx-impl.c
浏览文件 @ ef24726e
......@@ -380,8 +380,6 @@ static void gen_##name(DisasContext * ctx) \
gen_exception(ctx, POWERPC_EXCP_VSXU); \
return; \
} \
/* NIP cannot be restored if the memory exception comes from an helper */ \
gen_update_nip(ctx, ctx->nip - 4); \
opc = tcg_const_i32(ctx->opcode); \
gen_helper_##name(cpu_env, opc); \
tcg_temp_free_i32(opc); \
......@@ -394,10 +392,6 @@ static void gen_##name(DisasContext * ctx) \
gen_exception(ctx, POWERPC_EXCP_VSXU); \
return; \
} \
/* NIP cannot be restored if the exception comes */ \
/* from a helper. */ \
gen_update_nip(ctx, ctx->nip - 4); \
\
gen_helper_##name(cpu_vsrh(xT(ctx->opcode)), cpu_env, \
cpu_vsrh(xB(ctx->opcode))); \
}
......
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