gdb/testsuite/gdb.arch/aarch64-sme-sanity.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2023-2024 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 /* Sanity test to exercise AArch64's Scalable Vector/Matrix Extension basic
  19    functionality.  It cycles through different combinations of state and
  20    initializes different register sets.  */
  21
  22 #include <stdio.h>
  23 #include <sys/auxv.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <unistd.h>
  27
  28 #ifndef HWCAP_SVE
  29 #define HWCAP_SVE (1 << 22)
  30 #endif
  31
  32 #ifndef HWCAP2_SME
  33 #define HWCAP2_SME (1 << 23)
  34 #endif
  35
  36 #ifndef HWCAP2_SME2
  37 #define HWCAP2_SME2 (1UL << 37)
  38 #define HWCAP2_SME2P1 (1UL << 38)
  39 #endif
  40
  41 static void
  42 enable_za ()
  43 {
  44   /* smstart za */
  45   __asm __volatile (".word 0xD503457F");
  46 }
  47
  48 static void
  49 disable_za ()
  50 {
  51   /* smstop za */
  52   __asm __volatile (".word 0xD503447F");
  53 }
  54
  55 static void
  56 enable_sm ()
  57 {
  58   /* smstart sm */
  59   __asm __volatile (".word 0xD503437F");
  60 }
  61
  62 static void
  63 disable_sm ()
  64 {
  65   /* smstop sm */
  66   __asm __volatile (".word 0xD503427F");
  67 }
  68
  69 static void
  70 initialize_fpsimd_state ()
  71 {
  72   char buffer[16];
  73
  74   for (int i = 0; i < 16; i++)
  75     buffer[i] = 0x55;
  76
  77   __asm __volatile ("mov x0, %0\n\t" \
  78                     : : "r" (buffer));
  79
  80   __asm __volatile ("ldr q0, [x0]");
  81   __asm __volatile ("ldr q1, [x0]");
  82   __asm __volatile ("ldr q2, [x0]");
  83   __asm __volatile ("ldr q3, [x0]");
  84   __asm __volatile ("ldr q4, [x0]");
  85   __asm __volatile ("ldr q5, [x0]");
  86   __asm __volatile ("ldr q6, [x0]");
  87   __asm __volatile ("ldr q7, [x0]");
  88   __asm __volatile ("ldr q8, [x0]");
  89   __asm __volatile ("ldr q9, [x0]");
  90   __asm __volatile ("ldr q10, [x0]");
  91   __asm __volatile ("ldr q11, [x0]");
  92   __asm __volatile ("ldr q12, [x0]");
  93   __asm __volatile ("ldr q13, [x0]");
  94   __asm __volatile ("ldr q14, [x0]");
  95   __asm __volatile ("ldr q15, [x0]");
  96   __asm __volatile ("ldr q16, [x0]");
  97   __asm __volatile ("ldr q17, [x0]");
  98   __asm __volatile ("ldr q18, [x0]");
  99   __asm __volatile ("ldr q19, [x0]");
 100   __asm __volatile ("ldr q20, [x0]");
 101   __asm __volatile ("ldr q21, [x0]");
 102   __asm __volatile ("ldr q22, [x0]");
 103   __asm __volatile ("ldr q23, [x0]");
 104   __asm __volatile ("ldr q24, [x0]");
 105   __asm __volatile ("ldr q25, [x0]");
 106   __asm __volatile ("ldr q26, [x0]");
 107   __asm __volatile ("ldr q27, [x0]");
 108   __asm __volatile ("ldr q28, [x0]");
 109   __asm __volatile ("ldr q29, [x0]");
 110   __asm __volatile ("ldr q30, [x0]");
 111   __asm __volatile ("ldr q31, [x0]");
 112 }
 113
 114 static void
 115 initialize_za_state ()
 116 {
 117   /* zero za */
 118   __asm __volatile (".word 0xC00800FF");
 119
 120   char buffer[256];
 121
 122   for (int i = 0; i < 256; i++)
 123     buffer[i] = 0xaa;
 124
 125   __asm __volatile ("mov x0, %0\n\t" \
 126                     : : "r" (buffer));
 127
 128   /* Initialize loop boundaries.  */
 129   __asm __volatile ("mov w12, 0");
 130   __asm __volatile ("mov w17, 256");
 131
 132   /* loop: ldr za[w12, 0], [x0] */
 133   __asm __volatile ("loop: .word 0xe1000000");
 134   __asm __volatile ("add w12, w12, 1");
 135   __asm __volatile ("cmp w12, w17");
 136   __asm __volatile ("bne loop");
 137 }
 138
 139 static void
 140 initialize_zt_state ()
 141 {
 142   unsigned long hwcap2 = getauxval (AT_HWCAP2);
 143
 144   if (!(hwcap2 & HWCAP2_SME2) && !(hwcap2 & HWCAP2_SME2P1))
 145     return;
 146
 147   char buffer[64];
 148
 149   for (int i = 0; i < 64; i++)
 150     buffer[i] = 0xff;
 151
 152   __asm __volatile ("mov x0, %0\n\t" \
 153                     : : "r" (buffer));
 154
 155   /* Initialize ZT0.  */
 156   /* ldr zt0, x0 */
 157   __asm __volatile (".word 0xe11f8000");
 158 }
 159
 160 static void
 161 initialize_sve_state ()
 162 {
 163   __asm __volatile ("dup z0.b, -1");
 164   __asm __volatile ("dup z1.b, -1");
 165   __asm __volatile ("dup z2.b, -1");
 166   __asm __volatile ("dup z3.b, -1");
 167   __asm __volatile ("dup z4.b, -1");
 168   __asm __volatile ("dup z5.b, -1");
 169   __asm __volatile ("dup z6.b, -1");
 170   __asm __volatile ("dup z7.b, -1");
 171   __asm __volatile ("dup z8.b, -1");
 172   __asm __volatile ("dup z9.b, -1");
 173   __asm __volatile ("dup z10.b, -1");
 174   __asm __volatile ("dup z11.b, -1");
 175   __asm __volatile ("dup z12.b, -1");
 176   __asm __volatile ("dup z13.b, -1");
 177   __asm __volatile ("dup z14.b, -1");
 178   __asm __volatile ("dup z15.b, -1");
 179   __asm __volatile ("dup z16.b, -1");
 180   __asm __volatile ("dup z17.b, -1");
 181   __asm __volatile ("dup z18.b, -1");
 182   __asm __volatile ("dup z19.b, -1");
 183   __asm __volatile ("dup z20.b, -1");
 184   __asm __volatile ("dup z21.b, -1");
 185   __asm __volatile ("dup z22.b, -1");
 186   __asm __volatile ("dup z23.b, -1");
 187   __asm __volatile ("dup z24.b, -1");
 188   __asm __volatile ("dup z25.b, -1");
 189   __asm __volatile ("dup z26.b, -1");
 190   __asm __volatile ("dup z27.b, -1");
 191   __asm __volatile ("dup z28.b, -1");
 192   __asm __volatile ("dup z29.b, -1");
 193   __asm __volatile ("dup z30.b, -1");
 194   __asm __volatile ("dup z31.b, -1");
 195   __asm __volatile ("ptrue p0.b");
 196   __asm __volatile ("ptrue p1.b");
 197   __asm __volatile ("ptrue p2.b");
 198   __asm __volatile ("ptrue p3.b");
 199   __asm __volatile ("ptrue p4.b");
 200   __asm __volatile ("ptrue p5.b");
 201   __asm __volatile ("ptrue p6.b");
 202   __asm __volatile ("ptrue p7.b");
 203   __asm __volatile ("ptrue p8.b");
 204   __asm __volatile ("ptrue p9.b");
 205   __asm __volatile ("ptrue p10.b");
 206   __asm __volatile ("ptrue p11.b");
 207   __asm __volatile ("ptrue p12.b");
 208   __asm __volatile ("ptrue p13.b");
 209   __asm __volatile ("ptrue p14.b");
 210   __asm __volatile ("ptrue p15.b");
 211   __asm __volatile ("setffr");
 212 }
 213
 214 /* Enable register states based on STATE.
 215
 216    0 - FPSIMD
 217    1 - SVE
 218    2 - SSVE
 219    3 - ZA (+ SME2 ZT0)
 220    4 - ZA and SSVE (+ SME2 ZT0).  */
 221
 222 void enable_states (int state)
 223 {
 224   disable_za ();
 225   disable_sm ();
 226   initialize_fpsimd_state ();
 227
 228   if (state == 1)
 229     {
 230       initialize_sve_state ();
 231     }
 232   else if (state == 2)
 233     {
 234       enable_sm ();
 235       initialize_sve_state ();
 236     }
 237   else if (state == 3)
 238     {
 239       enable_za ();
 240       initialize_za_state ();
 241       initialize_zt_state ();
 242     }
 243   else if (state == 4)
 244     {
 245       enable_za ();
 246       enable_sm ();
 247       initialize_sve_state ();
 248       initialize_za_state ();
 249       initialize_zt_state ();
 250     }
 251
 252   return;
 253 }
 254
 255 void dummy ()
 256 {
 257 }
 258
 259 int
 260 main (int argc, char **argv)
 261 {
 262   if (getauxval (AT_HWCAP) & HWCAP_SVE && getauxval (AT_HWCAP2) & HWCAP2_SME)
 263     {
 264       for (int state = 0; state < 5; state++)
 265         {
 266           enable_states (state);
 267           dummy (); /* stop here */
 268         }
 269     }
 270   else
 271     {
 272       printf ("SKIP: no HWCAP_SVE or HWCAP2_SME on this system\n");
 273       return -1;
 274     }
 275
 276   return 0;
 277 }