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提交 6231868b 编写于 作者: E edgar_igl
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CRIS: Purify some of the flag evaluation helpers. 

Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6227 c046a42c-6fe2-441c-8c8c-71466251a162
上级 c1e1a491
隐藏空白更改
内联 并排
Showing with 154 addition and 160 deletion
target-cris/helper.h
浏览文件 @ 6231868b
......@@ -13,13 +13,13 @@ DEF_HELPER_2(movl_reg_sreg, void, i32, i32)
DEF_HELPER_FLAGS_1(lz, TCG_CALL_PURE, i32, i32);
DEF_HELPER_FLAGS_3(btst, TCG_CALL_PURE, i32, i32, i32, i32);
DEF_HELPER_0(evaluate_flags_muls, void)
DEF_HELPER_0(evaluate_flags_mulu, void)
DEF_HELPER_0(evaluate_flags_mcp, void)
DEF_HELPER_0(evaluate_flags_alu_4, void)
DEF_HELPER_0(evaluate_flags_sub_4, void)
DEF_HELPER_0(evaluate_flags_move_4, void)
DEF_HELPER_0(evaluate_flags_move_2, void)
DEF_HELPER_FLAGS_3(evaluate_flags_muls, TCG_CALL_PURE, i32, i32, i32, i32)
DEF_HELPER_FLAGS_3(evaluate_flags_mulu, TCG_CALL_PURE, i32, i32, i32, i32)
DEF_HELPER_FLAGS_4(evaluate_flags_mcp, TCG_CALL_PURE, i32, i32, i32, i32, i32)
DEF_HELPER_FLAGS_4(evaluate_flags_alu_4, TCG_CALL_PURE, i32, i32, i32, i32, i32)
DEF_HELPER_FLAGS_4(evaluate_flags_sub_4, TCG_CALL_PURE, i32, i32, i32, i32, i32)
DEF_HELPER_FLAGS_2(evaluate_flags_move_4, TCG_CALL_PURE, i32, i32, i32)
DEF_HELPER_FLAGS_2(evaluate_flags_move_2, TCG_CALL_PURE, i32, i32, i32)
DEF_HELPER_0(evaluate_flags, void)
DEF_HELPER_0(top_evaluate_flags, void)
......
target-cris/op_helper.c
浏览文件 @ 6231868b
......@@ -275,7 +275,7 @@ uint32_t helper_btst(uint32_t t0, uint32_t t1, uint32_t ccs)
return ccs;
}
static void evaluate_flags_writeback(uint32_t flags)
static inline uint32_t evaluate_flags_writeback(uint32_t flags, uint32_t ccs)
{
unsigned int x, z, mask;
......@@ -289,27 +289,19 @@ static void evaluate_flags_writeback(uint32_t flags)
flags &= mask;
/* all insn clear the x-flag except setf or clrf. */
env->pregs[PR_CCS] &= ~mask;
env->pregs[PR_CCS] |= flags;
ccs &= ~mask;
ccs |= flags;
return ccs;
}
void helper_evaluate_flags_muls(void)
uint32_t helper_evaluate_flags_muls(uint32_t ccs, uint32_t res, uint32_t mof)
{
uint32_t src;
uint32_t dst;
uint32_t res;
uint32_t flags = 0;
int64_t tmp;
int32_t mof;
int dneg;
src = env->cc_src;
dst = env->cc_dest;
res = env->cc_result;
dneg = ((int32_t)res) < 0;
mof = env->pregs[PR_MOF];
tmp = mof;
tmp <<= 32;
tmp |= res;
......@@ -320,23 +312,14 @@ void helper_evaluate_flags_muls(void)
if ((dneg && mof != -1)
|| (!dneg && mof != 0))
flags |= V_FLAG;
evaluate_flags_writeback(flags);
return evaluate_flags_writeback(flags, ccs);
}
void helper_evaluate_flags_mulu(void)
uint32_t helper_evaluate_flags_mulu(uint32_t ccs, uint32_t res, uint32_t mof)
{
uint32_t src;
uint32_t dst;
uint32_t res;
uint32_t flags = 0;
uint64_t tmp;
uint32_t mof;
src = env->cc_src;
dst = env->cc_dest;
res = env->cc_result;
mof = env->pregs[PR_MOF];
tmp = mof;
tmp <<= 32;
tmp |= res;
......@@ -347,19 +330,16 @@ void helper_evaluate_flags_mulu(void)
if (mof)
flags |= V_FLAG;
evaluate_flags_writeback(flags);
return evaluate_flags_writeback(flags, ccs);
}
void helper_evaluate_flags_mcp(void)
uint32_t helper_evaluate_flags_mcp(uint32_t ccs,
uint32_t src, uint32_t dst, uint32_t res)
{
uint32_t src;
uint32_t dst;
uint32_t res;
uint32_t flags = 0;
src = env->cc_src & 0x80000000;
dst = env->cc_dest & 0x80000000;
res = env->cc_result;
src = src & 0x80000000;
dst = dst & 0x80000000;
if ((res & 0x80000000L) != 0L)
{
......@@ -379,19 +359,16 @@ void helper_evaluate_flags_mcp(void)
flags |= R_FLAG;
}
evaluate_flags_writeback(flags);
return evaluate_flags_writeback(flags, ccs);
}
void helper_evaluate_flags_alu_4(void)
uint32_t helper_evaluate_flags_alu_4(uint32_t ccs,
uint32_t src, uint32_t dst, uint32_t res)
{
uint32_t src;
uint32_t dst;
uint32_t res;
uint32_t flags = 0;
src = env->cc_src & 0x80000000;
dst = env->cc_dest & 0x80000000;
res = env->cc_result;
src = src & 0x80000000;
dst = dst & 0x80000000;
if ((res & 0x80000000L) != 0L)
{
......@@ -411,19 +388,16 @@ void helper_evaluate_flags_alu_4(void)
flags |= C_FLAG;
}
evaluate_flags_writeback(flags);
return evaluate_flags_writeback(flags, ccs);
}
void helper_evaluate_flags_sub_4(void)
uint32_t helper_evaluate_flags_sub_4(uint32_t ccs,
uint32_t src, uint32_t dst, uint32_t res)
{
uint32_t src;
uint32_t dst;
uint32_t res;
uint32_t flags = 0;
src = (~env->cc_src) & 0x80000000;
dst = env->cc_dest & 0x80000000;
res = env->cc_result;
src = (~src) & 0x80000000;
dst = dst & 0x80000000;
if ((res & 0x80000000L) != 0L)
{
......@@ -444,47 +418,37 @@ void helper_evaluate_flags_sub_4(void)
}
flags ^= C_FLAG;
evaluate_flags_writeback(flags);
return evaluate_flags_writeback(flags, ccs);
}
void helper_evaluate_flags_move_4 (void)
uint32_t helper_evaluate_flags_move_4(uint32_t ccs, uint32_t res)
{
uint32_t res;
uint32_t flags = 0;
res = env->cc_result;
if ((int32_t)res < 0)
flags |= N_FLAG;
else if (res == 0L)
flags |= Z_FLAG;
evaluate_flags_writeback(flags);
return evaluate_flags_writeback(flags, ccs);
}
void helper_evaluate_flags_move_2 (void)
uint32_t helper_evaluate_flags_move_2(uint32_t ccs, uint32_t res)
{
uint32_t src;
uint32_t flags = 0;
uint16_t res;
src = env->cc_src;
res = env->cc_result;
if ((int16_t)res < 0L)
flags |= N_FLAG;
else if (res == 0)
flags |= Z_FLAG;
evaluate_flags_writeback(flags);
return evaluate_flags_writeback(flags, ccs);
}
/* TODO: This is expensive. We could split things up and only evaluate part of
CCR on a need to know basis. For now, we simply re-evaluate everything. */
void helper_evaluate_flags (void)
void helper_evaluate_flags(void)
{
uint32_t src;
uint32_t dst;
uint32_t res;
uint32_t src, dst, res;
uint32_t flags = 0;
src = env->cc_src;
......@@ -595,11 +559,10 @@ void helper_evaluate_flags (void)
break;
}
if (env->cc_op == CC_OP_SUB
|| env->cc_op == CC_OP_CMP) {
if (env->cc_op == CC_OP_SUB || env->cc_op == CC_OP_CMP)
flags ^= C_FLAG;
}
evaluate_flags_writeback(flags);
env->pregs[PR_CCS] = evaluate_flags_writeback(flags, env->pregs[PR_CCS]);
}
void helper_top_evaluate_flags(void)
......@@ -607,13 +570,19 @@ void helper_top_evaluate_flags(void)
switch (env->cc_op)
{
case CC_OP_MCP:
helper_evaluate_flags_mcp();
env->pregs[PR_CCS] = helper_evaluate_flags_mcp(
env->pregs[PR_CCS], env->cc_src,
env->cc_dest, env->cc_result);
break;
case CC_OP_MULS:
helper_evaluate_flags_muls();
env->pregs[PR_CCS] = helper_evaluate_flags_muls(
env->pregs[PR_CCS], env->cc_result,
env->pregs[PR_MOF]);
break;
case CC_OP_MULU:
helper_evaluate_flags_mulu();
env->pregs[PR_CCS] = helper_evaluate_flags_mulu(
env->pregs[PR_CCS], env->cc_result,
env->pregs[PR_MOF]);
break;
case CC_OP_MOVE:
case CC_OP_AND:
......@@ -622,26 +591,36 @@ void helper_top_evaluate_flags(void)
case CC_OP_ASR:
case CC_OP_LSR:
case CC_OP_LSL:
switch (env->cc_size)
{
case 4:
helper_evaluate_flags_move_4();
break;
case 2:
helper_evaluate_flags_move_2();
break;
default:
helper_evaluate_flags();
break;
}
break;
switch (env->cc_size)
{
case 4:
env->pregs[PR_CCS] =
helper_evaluate_flags_move_4(
env->pregs[PR_CCS],
env->cc_result);
break;
case 2:
env->pregs[PR_CCS] =
helper_evaluate_flags_move_2(
env->pregs[PR_CCS],
env->cc_result);
break;
default:
helper_evaluate_flags();
break;
}
break;
case CC_OP_FLAGS:
/* live. */
break;
case CC_OP_SUB:
case CC_OP_CMP:
if (env->cc_size == 4)
helper_evaluate_flags_sub_4();
env->pregs[PR_CCS] =
helper_evaluate_flags_sub_4(
env->pregs[PR_CCS],
env->cc_src, env->cc_dest,
env->cc_result);
else
helper_evaluate_flags();
break;
......@@ -649,12 +628,16 @@ void helper_top_evaluate_flags(void)
{
switch (env->cc_size)
{
case 4:
helper_evaluate_flags_alu_4();
break;
default:
helper_evaluate_flags();
break;
case 4:
env->pregs[PR_CCS] =
helper_evaluate_flags_alu_4(
env->pregs[PR_CCS],
env->cc_src, env->cc_dest,
env->cc_result);
break;
default:
helper_evaluate_flags();
break;
}
}
break;
......
target-cris/translate.c
浏览文件 @ 6231868b
......@@ -565,74 +565,85 @@ static void cris_flush_cc_state(DisasContext *dc)
static void cris_evaluate_flags(DisasContext *dc)
{
if (!dc->flags_uptodate) {
cris_flush_cc_state(dc);
if (dc->flags_uptodate)
return;
switch (dc->cc_op)
cris_flush_cc_state(dc);
switch (dc->cc_op)
{
case CC_OP_MCP:
gen_helper_evaluate_flags_mcp(cpu_PR[PR_CCS],
cpu_PR[PR_CCS], cc_src,
cc_dest, cc_result);
break;
case CC_OP_MULS:
gen_helper_evaluate_flags_muls(cpu_PR[PR_CCS],
cpu_PR[PR_CCS], cc_result,
cpu_PR[PR_MOF]);
break;
case CC_OP_MULU:
gen_helper_evaluate_flags_mulu(cpu_PR[PR_CCS],
cpu_PR[PR_CCS], cc_result,
cpu_PR[PR_MOF]);
break;
case CC_OP_MOVE:
case CC_OP_AND:
case CC_OP_OR:
case CC_OP_XOR:
case CC_OP_ASR:
case CC_OP_LSR:
case CC_OP_LSL:
switch (dc->cc_size)
{
case CC_OP_MCP:
gen_helper_evaluate_flags_mcp();
break;
case CC_OP_MULS:
gen_helper_evaluate_flags_muls();
break;
case CC_OP_MULU:
gen_helper_evaluate_flags_mulu();
break;
case CC_OP_MOVE:
case CC_OP_AND:
case CC_OP_OR:
case CC_OP_XOR:
case CC_OP_ASR:
case CC_OP_LSR:
case CC_OP_LSL:
switch (dc->cc_size)
{
case 4:
gen_helper_evaluate_flags_move_4();
break;
case 2:
gen_helper_evaluate_flags_move_2();
break;
default:
gen_helper_evaluate_flags();
break;
}
break;
case CC_OP_FLAGS:
/* live. */
break;
case CC_OP_SUB:
case CC_OP_CMP:
if (dc->cc_size == 4)
gen_helper_evaluate_flags_sub_4();
else
gen_helper_evaluate_flags();
case 4:
gen_helper_evaluate_flags_move_4(cpu_PR[PR_CCS],
cpu_PR[PR_CCS], cc_result);
break;
case 2:
gen_helper_evaluate_flags_move_2(cpu_PR[PR_CCS],
cpu_PR[PR_CCS], cc_result);
break;
default:
gen_helper_evaluate_flags();
break;
}
break;
case CC_OP_FLAGS:
/* live. */
break;
case CC_OP_SUB:
case CC_OP_CMP:
if (dc->cc_size == 4)
gen_helper_evaluate_flags_sub_4(cpu_PR[PR_CCS],
cpu_PR[PR_CCS], cc_src, cc_dest, cc_result);
else
gen_helper_evaluate_flags();
break;
default:
switch (dc->cc_size)
{
case 4:
gen_helper_evaluate_flags_alu_4(cpu_PR[PR_CCS],
cpu_PR[PR_CCS], cc_src, cc_dest, cc_result);
break;
default:
switch (dc->cc_size)
{
case 4:
gen_helper_evaluate_flags_alu_4();
break;
default:
gen_helper_evaluate_flags();
break;
}
break;
gen_helper_evaluate_flags();
break;
}
if (dc->flagx_known) {
if (dc->flags_x)
tcg_gen_ori_tl(cpu_PR[PR_CCS],
cpu_PR[PR_CCS], X_FLAG);
else
tcg_gen_andi_tl(cpu_PR[PR_CCS],
cpu_PR[PR_CCS], ~X_FLAG);
}
dc->flags_uptodate = 1;
break;
}
if (dc->flagx_known) {
if (dc->flags_x)
tcg_gen_ori_tl(cpu_PR[PR_CCS],
cpu_PR[PR_CCS], X_FLAG);
else
tcg_gen_andi_tl(cpu_PR[PR_CCS],
cpu_PR[PR_CCS], ~X_FLAG);
}
dc->flags_uptodate = 1;
}
static void cris_cc_mask(DisasContext *dc, unsigned int mask)
......
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