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提交 eb44b959 编写于 作者: A aurel32
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target-ppc: update nip before calling an helper in FP instructions 

Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6045 c046a42c-6fe2-441c-8c8c-71466251a162
上级 330c483b
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Showing with 32 addition and 2 deletion
target-ppc/translate.c
浏览文件 @ eb44b959
......@@ -2072,6 +2072,8 @@ GEN_HANDLER(f##name, op1, op2, 0xFF, 0x00000000, type) \
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_fpr[rA(ctx->opcode)], \
cpu_fpr[rC(ctx->opcode)], cpu_fpr[rB(ctx->opcode)]); \
......@@ -2093,6 +2095,8 @@ GEN_HANDLER(f##name, op1, op2, 0xFF, inval, type) \
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_fpr[rA(ctx->opcode)], \
cpu_fpr[rB(ctx->opcode)]); \
......@@ -2113,6 +2117,8 @@ GEN_HANDLER(f##name, op1, op2, 0xFF, inval, type) \
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_fpr[rA(ctx->opcode)], \
cpu_fpr[rC(ctx->opcode)]); \
......@@ -2133,6 +2139,8 @@ GEN_HANDLER(f##name, 0x3F, op2, op3, 0x001F0000, type) \
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_fpr[rB(ctx->opcode)]); \
gen_compute_fprf(cpu_fpr[rD(ctx->opcode)], \
......@@ -2146,6 +2154,8 @@ GEN_HANDLER(f##name, op1, op2, 0xFF, 0x001F07C0, type) \
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_fpr[rB(ctx->opcode)]); \
gen_compute_fprf(cpu_fpr[rD(ctx->opcode)], \
......@@ -2175,6 +2185,8 @@ GEN_HANDLER(frsqrtes, 0x3B, 0x1A, 0xFF, 0x001F07C0, PPC_FLOAT_FRSQRTES)
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_fpr[rB(ctx->opcode)]);
gen_helper_frsp(cpu_fpr[rD(ctx->opcode)], cpu_fpr[rD(ctx->opcode)]);
......@@ -2193,6 +2205,8 @@ GEN_HANDLER(fsqrt, 0x3F, 0x16, 0xFF, 0x001F07C0, PPC_FLOAT_FSQRT)
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_fpr[rB(ctx->opcode)]);
gen_compute_fprf(cpu_fpr[rD(ctx->opcode)], 1, Rc(ctx->opcode) != 0);
......@@ -2204,6 +2218,8 @@ GEN_HANDLER(fsqrts, 0x3B, 0x16, 0xFF, 0x001F07C0, PPC_FLOAT_FSQRT)
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_fpr[rB(ctx->opcode)]);
gen_helper_frsp(cpu_fpr[rD(ctx->opcode)], cpu_fpr[rD(ctx->opcode)]);
......@@ -2254,6 +2270,8 @@ GEN_HANDLER(fcmpo, 0x3F, 0x00, 0x01, 0x00600001, PPC_FLOAT)
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_fpr[rA(ctx->opcode)], cpu_fpr[rB(ctx->opcode)], crf);
......@@ -2269,6 +2287,8 @@ GEN_HANDLER(fcmpu, 0x3F, 0x00, 0x00, 0x00600001, PPC_FLOAT)
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_fpr[rA(ctx->opcode)], cpu_fpr[rB(ctx->opcode)], crf);
......@@ -2340,7 +2360,10 @@ GEN_HANDLER(mtfsb0, 0x3F, 0x06, 0x02, 0x001FF800, PPC_FLOAT)
crb = 31 - crbD(ctx->opcode);
gen_reset_fpstatus();
if (likely(crb != FPSCR_FEX && crb != FPSCR_VX)) {
TCGv_i32 t0 = tcg_const_i32(crb);
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(t0);
tcg_temp_free_i32(t0);
}
......@@ -2362,7 +2385,10 @@ GEN_HANDLER(mtfsb1, 0x3F, 0x06, 0x01, 0x001FF800, PPC_FLOAT)
gen_reset_fpstatus();
/* 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 = tcg_const_i32(crb);
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(t0);
tcg_temp_free_i32(t0);
}
......@@ -2382,6 +2408,8 @@ GEN_HANDLER(mtfsf, 0x3F, 0x07, 0x16, 0x02010000, PPC_FLOAT)
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();
t0 = tcg_const_i32(FM(ctx->opcode));
gen_helper_store_fpscr(cpu_fpr[rB(ctx->opcode)], t0);
......@@ -2406,6 +2434,8 @@ GEN_HANDLER(mtfsfi, 0x3F, 0x06, 0x04, 0x006f0800, PPC_FLOAT)
}
bf = crbD(ctx->opcode) >> 2;
sh = 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(FPIMM(ctx->opcode) << (4 * sh));
t1 = tcg_const_i32(1 << sh);
......
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