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/*
* Copyright (c) 2024 Free Software Foundation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <syscalls.h>
#include <testlib.h>
#include <mach/exception.h>
#include <mach.user.h>
#include <mach_port.user.h>
#if defined(__i386__) || defined(__x86_64__)
#include <mach_i386.user.h>
static void printx(struct i386_xfloat_state *state, int size)
{
printf("xfloat init %d fp %d exc %d\n",
state->initialized, state->fpkind, state->exc_status);
struct i386_xfp_save *xfp = (struct i386_xfp_save *) &state->hw_state[0];
printf("xfp %x %x %x %x %x %x %x %x\n",
xfp->fp_control, xfp->fp_status, xfp->fp_tag, xfp->fp_eip,
xfp->fp_cs, xfp->fp_opcode, xfp->fp_dp, xfp->fp_ds);
for (int i=0; i<8; i++)
{
printf("fp%d", i);
for (int j=0; j<16; j++)
printf(" %02x", xfp->fp_reg_word[i][j]);
printf("\n");
}
for (int i=0; i<16; i++)
{
printf("xmm%02d", i);
for (int j=0; j<16; j++)
printf(" %02x", xfp->fp_xreg_word[i][j]);
printf("\n");
}
printf("header xfp_features %llx bv %llx\n",
xfp->header.xfp_features, xfp->header.xcomp_bv);
int rem = size - sizeof(*state) - sizeof(struct i386_xfp_save);
if (rem > 0)
{
int iter = 0;
while (rem > 0)
{
const int len = 16;
int n;
if (rem > len)
n = len;
else
n = rem;
printf("ext");
for (int j=0; j<n; j++)
printf(" %02x", xfp->extended[j + iter*len]);
printf("\n");
rem -= n;
iter++;
}
}
}
static void thread_fp_getset(void *arg)
{
int err;
thread_t th = *(thread_t*)arg;
wait_thread_suspended(th);
mach_msg_type_number_t state_count = i386_FLOAT_STATE_COUNT;
struct i386_float_state state;
memset(&state, 0, sizeof(state));
err = thread_get_state(th, i386_FLOAT_STATE,
(thread_state_t) &state, &state_count);
ASSERT_RET(err, "thread_get_state get failed");
ASSERT(state_count == i386_FLOAT_STATE_COUNT, "bad state_count");
struct i386_fp_regs *fpr =
(struct i386_fp_regs *) (&state.hw_state[0] + sizeof(struct i386_fp_save));
printf("fp regs get:\n");
for (int i=0; i<8; i++)
{
printf("fp%d", i);
for (int j=0; j<5; j++)
printf(" %04x", fpr->fp_reg_word[i][j]);
printf("\n");
}
char tmp[10];
memcpy(tmp, &fpr->fp_reg_word[1][0], sizeof(tmp));
memcpy(&fpr->fp_reg_word[1][0], &fpr->fp_reg_word[0][0], sizeof(tmp));
memcpy(&fpr->fp_reg_word[0][0], tmp, sizeof(tmp));
printf("fp regs set:\n");
for (int i=0; i<8; i++)
{
printf("fp%d", i);
for (int j=0; j<5; j++)
printf(" %04x", fpr->fp_reg_word[i][j]);
printf("\n");
}
err = thread_set_state(th, i386_FLOAT_STATE,
(thread_state_t) &state, state_count);
ASSERT_RET(err, "thread_set_state set failed");
err = thread_resume(th);
ASSERT_RET(err, "error in thread_resume");
thread_terminate(mach_thread_self());
FAILURE("thread_terminate");
}
static void test_fp_state_getset()
{
int err;
thread_t th = mach_thread_self();
/* load some known value in FP registers */
int n1[1] = {1111111111};
float d2[1] = {123.456};
asm volatile ("fildl %0\n"
"fldl %1\n"
:: "m" (n1), "m" (d2) :);
/* then switch to the get/set test thread, and wait to be resumed */
test_thread_start(mach_task_self(), thread_fp_getset, &th);
err = thread_suspend(th);
ASSERT_RET(err, "error in thread_suspend");
/* and check that now we have the values swapped in FP registers */
int m1[1] = {0};
float f2[1] = {0.0};
asm volatile ("fistpl %0\n"
"fstpl %1\n"
:: "m" (m1), "m" (f2):);
int fint, fdec;
fint = (int)f2[0];
fdec = (int)((f2[0] - fint) * 1000);
printf("fp %d %d.%03d\n", m1[0], fint, fdec);
ASSERT(n1[0] == m1[0], "error in moving int value in fp regs");
ASSERT(f2[0] == d2[0], "error in moving fp value in fp regs");
}
static void thread_xfp_getset(void *arg)
{
int err;
thread_t th = *(thread_t*)arg;
wait_thread_suspended(th);
vm_size_t xfp_size;
err = i386_get_xstate_size(host_priv(), &xfp_size);
ASSERT_RET(err, "i386_get_xstate_size");
mach_msg_type_number_t state_count = xfp_size / sizeof(integer_t);
struct i386_xfloat_state *state = __builtin_alloca(xfp_size);
printf("xfp size %u min %u\n", xfp_size, sizeof(struct i386_xfloat_state));
memset(state, 0, xfp_size);
err = thread_get_state(th, i386_XFLOAT_STATE,
(thread_state_t) state, &state_count);
ASSERT_RET(err, "thread_get_state get failed");
ASSERT(state_count == (xfp_size / sizeof(integer_t)), "bad state_count");
printx(state, xfp_size);
struct i386_xfp_save *xfp = (struct i386_xfp_save *) &state->hw_state[0];
printf("xmm3 (after get)");
for (int j=0; j<16; j++)
printf(" %02x", xfp->fp_xreg_word[3][j]);
printf("\n");
for (int j=0; j<16; j++)
ASSERT(xfp->fp_xreg_word[3][j] == 0x33,
"register xmm3 wasn't correctly retrieved from the getset thread");
memset(xfp->fp_xreg_word[7], 0x77, 16);
err = thread_set_state(th, i386_XFLOAT_STATE,
(thread_state_t) state, state_count);
ASSERT_RET(err, "thread_set_state set failed");
err = thread_resume(th);
ASSERT_RET(err, "error in thread_resume");
thread_terminate(mach_thread_self());
FAILURE("thread_terminate");
}
static void test_xfp_state_getset()
{
int err;
thread_t th = mach_thread_self();
/* load some known value in XMM registers */
char buf3[16];
memset(buf3, 0x33, 16);
asm volatile ("movups (%0),%%xmm3" :: "r" (buf3) :);
/* then switch to the get/set test thread, and wait to be resumed */
test_thread_start(mach_task_self(), thread_xfp_getset, &th);
err = thread_suspend(th);
ASSERT_RET(err, "error in thread_suspend");
/* and check that now we have different values in XMM registers */
char buf7[16];
memset(buf7, 0, 16);
asm volatile ("movups %%xmm7,(%0)" :: "r" (buf7) :);
printf("xmm7 (after set)");
for (int j=0; j<16; j++)
printf(" %02x", buf7[j]);
printf("\n");
for (int j=0; j<16; j++)
ASSERT(buf7[j] == 0x77,
"register xmm7 wasn't correctly set by the getset thread");
}
#endif
int main(int argc, char *argv[], int envc, char *envp[])
{
#if defined(__i386__) || defined(__x86_64__)
test_fp_state_getset();
test_xfp_state_getset();
#else
FAILURE("FP/XSTATE test missing on this arch!");
#endif
return 0;
}
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