Support amd64 AVX.

gdb/

2010-04-07  H.J. Lu  <hongjiu.lu@intel.com>

	* amd64-linux-nat.c: Include "regset.h", "elf/common.h",
	<sys/uio.h> and "i386-xstate.h".
	(PTRACE_GETREGSET): New.
	(PTRACE_SETREGSET): Likewise.
	(have_ptrace_getregset): Likewise.
	(amd64_linux_gregset64_reg_offset): Include 16 upper YMM
	registers.
	(amd64_linux_gregset32_reg_offset): Include 8 upper YMM
	registers.
	(amd64_linux_fetch_inferior_registers): Support PTRACE_GETFPREGS.
	(amd64_linux_store_inferior_registers): Likewise.
	(amd64_linux_read_description): Check and enable AVX target
	descriptions.

	* amd64-linux-tdep.c: Include "regset.h", "i386-linux-tdep.h"
	and "features/i386/amd64-avx-linux.c".
	(amd64_linux_regset_sections): New.
	(amd64_linux_core_read_description): Check and enable AVX
	target description.
	(amd64_linux_init_abi): Set xsave_xcr0_offset.  Call
	set_gdbarch_core_regset_sections.
	(_initialize_amd64_linux_tdep): Call
	initialize_tdesc_amd64_avx_linux.

	* amd64-linux-tdep.h (AMD64_LINUX_ORIG_RAX_REGNUM): Replace
	AMD64_MXCSR_REGNUM with AMD64_YMM15H_REGNUM.
	(tdesc_amd64_avx_linux): New.
	(amd64_linux_update_xstateregset): Likewise.

	* amd64-tdep.c: Include "features/i386/amd64-avx.c".
	(amd64_ymm_names): New.
	(amd64_ymmh_names): Likewise.
	(amd64_register_name): Likewise.
	(amd64_supply_xstateregset): Likewise.
	(amd64_collect_xstateregset): Likewise.
	(amd64_supply_xsave): Likewise.
	(amd64_collect_xsave): Likewise.
	(AMD64_NUM_REGS): Removed.
	(amd64_dwarf_reg_to_regnum): Return %ymmN register number for
	%xmmN if AVX is available.
	(amd64_pseudo_register_name): Support pseudo YMM registers.
	(amd64_regset_from_core_section): Support .reg-xstate section.
	(amd64_init_abi): Set ymmh_register_names, num_ymm_regs
	and ymm0h_regnum.  Call set_gdbarch_register_name.
	(amd64_init_abi): Call initialize_tdesc_amd64_avx.

	* amd64-tdep.h (amd64_regnum): Add AMD64_YMM0H_REGNUM and
	AMD64_YMM15H_REGNUM.
	(AMD64_NUM_REGS): New.
	(amd64_supply_xsave): Likewise.
	(amd64_collect_xsave): Likewise.
	(amd64_register_name): Removed.
	(amd64_register_type): Likewise.

gdb/testsuite/

2010-04-07  H.J. Lu  <hongjiu.lu@intel.com>

	* gdb.arch/i386-avx.c: New.
	* gdb.arch/i386-avx.exp: Likewise.

	* gdb.arch/i386-cpuid.h: Updated from gcc 4.4.

2 files changed, 306 insertions, 53 deletions

diff --git a/gdb/testsuite/gdb.arch/i386-avx.c b/gdb/testsuite/gdb.arch/i386-avx.c
new file mode 100644
index 0000000..73f92b6
--- /dev/null
+++ b/gdb/testsuite/gdb.arch/i386-avx.c
@@ -0,0 +1,128 @@
+/* Test program for AVX registers.
+
+   Copyright 2010 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   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 3 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, see <http://www.gnu.org/licenses/>.  */
+
+#include <stdio.h>
+#include "i386-cpuid.h"
+
+typedef struct {
+  float f[8];
+} v8sf_t;
+
+
+v8sf_t data[] =
+  {
+    { {  0.0,  0.125,  0.25,  0.375,  0.50,  0.625,  0.75,  0.875 } },
+    { {  1.0,  1.125,  1.25,  1.375,  1.50,  1.625,  1.75,  1.875 } },
+    { {  2.0,  2.125,  2.25,  2.375,  2.50,  2.625,  2.75,  2.875 } },
+    { {  3.0,  3.125,  3.25,  3.375,  3.50,  3.625,  3.75,  3.875 } },
+    { {  4.0,  4.125,  4.25,  4.375,  4.50,  4.625,  4.75,  4.875 } },
+    { {  5.0,  5.125,  5.25,  5.375,  5.50,  5.625,  5.75,  5.875 } },
+    { {  6.0,  6.125,  6.25,  6.375,  6.50,  6.625,  6.75,  6.875 } },
+    { {  7.0,  7.125,  7.25,  7.375,  7.50,  7.625,  7.75,  7.875 } },
+#ifdef __x86_64__
+    { {  8.0,  8.125,  8.25,  8.375,  8.50,  8.625,  8.75,  8.875 } },
+    { {  9.0,  9.125,  9.25,  9.375,  9.50,  9.625,  9.75,  9.875 } },
+    { { 10.0, 10.125, 10.25, 10.375, 10.50, 10.625, 10.75, 10.875 } },
+    { { 11.0, 11.125, 11.25, 11.375, 11.50, 11.625, 11.75, 11.875 } },
+    { { 12.0, 12.125, 12.25, 12.375, 12.50, 12.625, 12.75, 12.875 } },
+    { { 13.0, 13.125, 13.25, 13.375, 13.50, 13.625, 13.75, 13.875 } },
+    { { 14.0, 14.125, 14.25, 14.375, 14.50, 14.625, 14.75, 14.875 } },
+    { { 15.0, 15.125, 15.25, 15.375, 15.50, 15.625, 15.75, 15.875 } },
+#endif
+  };
+
+
+int
+have_avx (void)
+{
+  unsigned int eax, ebx, ecx, edx;
+
+  if (!__get_cpuid (1, &eax, &ebx, &ecx, &edx))
+    return 0;
+
+  if ((ecx & (bit_AVX | bit_OSXSAVE)) == (bit_AVX | bit_OSXSAVE))
+    return 1;
+  else
+    return 0;
+}
+
+int
+main (int argc, char **argv)
+{
+  if (have_avx ())
+    {
+      asm ("vmovaps 0(%0), %%ymm0\n\t"
+           "vmovaps 32(%0), %%ymm1\n\t"
+           "vmovaps 64(%0), %%ymm2\n\t"
+           "vmovaps 96(%0), %%ymm3\n\t"
+           "vmovaps 128(%0), %%ymm4\n\t"
+           "vmovaps 160(%0), %%ymm5\n\t"
+           "vmovaps 192(%0), %%ymm6\n\t"
+           "vmovaps 224(%0), %%ymm7\n\t"
+           : /* no output operands */
+           : "r" (data) 
+           : "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6", "xmm7");
+#ifdef __x86_64__
+      asm ("vmovaps 256(%0), %%ymm8\n\t"
+           "vmovaps 288(%0), %%ymm9\n\t"
+           "vmovaps 320(%0), %%ymm10\n\t"
+           "vmovaps 352(%0), %%ymm11\n\t"
+           "vmovaps 384(%0), %%ymm12\n\t"
+           "vmovaps 416(%0), %%ymm13\n\t"
+           "vmovaps 448(%0), %%ymm14\n\t"
+           "vmovaps 480(%0), %%ymm15\n\t"
+           : /* no output operands */
+           : "r" (data) 
+           : "xmm8", "xmm9", "xmm10", "xmm11", "xmm12", "xmm13", "xmm14", "xmm15");
+#endif
+
+      asm ("nop"); /* first breakpoint here */
+
+      asm (
+           "vmovaps %%ymm0, 0(%0)\n\t"
+           "vmovaps %%ymm1, 32(%0)\n\t"
+           "vmovaps %%ymm2, 64(%0)\n\t"
+           "vmovaps %%ymm3, 96(%0)\n\t"
+           "vmovaps %%ymm4, 128(%0)\n\t"
+           "vmovaps %%ymm5, 160(%0)\n\t"
+           "vmovaps %%ymm6, 192(%0)\n\t"
+           "vmovaps %%ymm7, 224(%0)\n\t"
+           : /* no output operands */
+           : "r" (data) 
+           : "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6", "xmm7");
+#ifdef __x86_64__
+      asm (
+           "vmovaps %%ymm8, 256(%0)\n\t"
+           "vmovaps %%ymm9, 288(%0)\n\t"
+           "vmovaps %%ymm10, 320(%0)\n\t"
+           "vmovaps %%ymm11, 352(%0)\n\t"
+           "vmovaps %%ymm12, 384(%0)\n\t"
+           "vmovaps %%ymm13, 416(%0)\n\t"
+           "vmovaps %%ymm14, 448(%0)\n\t"
+           "vmovaps %%ymm15, 480(%0)\n\t"
+           : /* no output operands */
+           : "r" (data) 
+           : "xmm8", "xmm9", "xmm10", "xmm11", "xmm12", "xmm13", "xmm14", "xmm15");
+#endif
+
+      puts ("Bye!"); /* second breakpoint here */
+    }
+
+  return 0;
+}
diff --git a/gdb/testsuite/gdb.arch/i386-cpuid.h b/gdb/testsuite/gdb.arch/i386-cpuid.h
index 7ff0dbab..5ebde5a 100644
--- a/gdb/testsuite/gdb.arch/i386-cpuid.h
+++ b/gdb/testsuite/gdb.arch/i386-cpuid.h
@@ -1,75 +1,200 @@
-/* Helper file for i386 platform.  Runtime check for MMX/SSE/SSE2 support.
+/* Helper file for i386 platform.  Runtime check for MMX/SSE/SSE2/AVX
+ * support. Copied from gcc 4.4.
+ *
+ * Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc.
+ *
+ * This file 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 3, or (at your option) any
+ * later version.
+ * 
+ * This file 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.
+ * 
+ * Under Section 7 of GPL version 3, you are granted additional
+ * permissions described in the GCC Runtime Library Exception, version
+ * 3.1, as published by the Free Software Foundation.
+ * 
+ * You should have received a copy of the GNU General Public License and
+ * a copy of the GCC Runtime Library Exception along with this program;
+ * see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
 
-   Copyright 2004, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+/* %ecx */
+#define bit_SSE3	(1 << 0)
+#define bit_PCLMUL	(1 << 1)
+#define bit_SSSE3	(1 << 9)
+#define bit_FMA		(1 << 12)
+#define bit_CMPXCHG16B	(1 << 13)
+#define bit_SSE4_1	(1 << 19)
+#define bit_SSE4_2	(1 << 20)
+#define bit_MOVBE	(1 << 22)
+#define bit_POPCNT	(1 << 23)
+#define bit_AES		(1 << 25)
+#define bit_XSAVE	(1 << 26)
+#define bit_OSXSAVE	(1 << 27)
+#define bit_AVX		(1 << 28)
 
-   This file is part of GDB.
+/* %edx */
+#define bit_CMPXCHG8B	(1 << 8)
+#define bit_CMOV	(1 << 15)
+#define bit_MMX		(1 << 23)
+#define bit_FXSAVE	(1 << 24)
+#define bit_SSE		(1 << 25)
+#define bit_SSE2	(1 << 26)
 
-   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 3 of the License, or
-   (at your option) any later version.
+/* Extended Features */
+/* %ecx */
+#define bit_LAHF_LM	(1 << 0)
+#define bit_ABM		(1 << 5)
+#define bit_SSE4a	(1 << 6)
+#define bit_XOP         (1 << 11)
+#define bit_LWP 	(1 << 15)
+#define bit_FMA4        (1 << 16)
 
-   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.
+/* %edx */
+#define bit_LM		(1 << 29)
+#define bit_3DNOWP	(1 << 30)
+#define bit_3DNOW	(1 << 31)
 
-   You should have received a copy of the GNU General Public License
-   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
-/* Used by 20020523-2.c and i386-sse-6.c, and possibly others.  */
-/* Plagarized from 20020523-2.c.  */
-/* Plagarized from gcc.  */
+#if defined(__i386__) && defined(__PIC__)
+/* %ebx may be the PIC register.  */
+#if __GNUC__ >= 3
+#define __cpuid(level, a, b, c, d)			\
+  __asm__ ("xchg{l}\t{%%}ebx, %1\n\t"			\
+	   "cpuid\n\t"					\
+	   "xchg{l}\t{%%}ebx, %1\n\t"			\
+	   : "=a" (a), "=r" (b), "=c" (c), "=d" (d)	\
+	   : "0" (level))
 
-#define bit_CMOV (1 << 15)
-#define bit_MMX (1 << 23)
-#define bit_SSE (1 << 25)
-#define bit_SSE2 (1 << 26)
+#define __cpuid_count(level, count, a, b, c, d)		\
+  __asm__ ("xchg{l}\t{%%}ebx, %1\n\t"			\
+	   "cpuid\n\t"					\
+	   "xchg{l}\t{%%}ebx, %1\n\t"			\
+	   : "=a" (a), "=r" (b), "=c" (c), "=d" (d)	\
+	   : "0" (level), "2" (count))
+#else
+/* Host GCCs older than 3.0 weren't supporting Intel asm syntax
+   nor alternatives in i386 code.  */
+#define __cpuid(level, a, b, c, d)			\
+  __asm__ ("xchgl\t%%ebx, %1\n\t"			\
+	   "cpuid\n\t"					\
+	   "xchgl\t%%ebx, %1\n\t"			\
+	   : "=a" (a), "=r" (b), "=c" (c), "=d" (d)	\
+	   : "0" (level))
 
-#ifndef NOINLINE
-#define NOINLINE __attribute__ ((noinline))
+#define __cpuid_count(level, count, a, b, c, d)		\
+  __asm__ ("xchgl\t%%ebx, %1\n\t"			\
+	   "cpuid\n\t"					\
+	   "xchgl\t%%ebx, %1\n\t"			\
+	   : "=a" (a), "=r" (b), "=c" (c), "=d" (d)	\
+	   : "0" (level), "2" (count))
 #endif
+#else
+#define __cpuid(level, a, b, c, d)			\
+  __asm__ ("cpuid\n\t"					\
+	   : "=a" (a), "=b" (b), "=c" (c), "=d" (d)	\
+	   : "0" (level))
 
-unsigned int i386_cpuid (void) NOINLINE;
+#define __cpuid_count(level, count, a, b, c, d)		\
+  __asm__ ("cpuid\n\t"					\
+	   : "=a" (a), "=b" (b), "=c" (c), "=d" (d)	\
+	   : "0" (level), "2" (count))
+#endif
 
-unsigned int NOINLINE
-i386_cpuid (void)
+/* Return highest supported input value for cpuid instruction.  ext can
+   be either 0x0 or 0x8000000 to return highest supported value for
+   basic or extended cpuid information.  Function returns 0 if cpuid
+   is not supported or whatever cpuid returns in eax register.  If sig
+   pointer is non-null, then first four bytes of the signature
+   (as found in ebx register) are returned in location pointed by sig.  */
+
+static __inline unsigned int
+__get_cpuid_max (unsigned int __ext, unsigned int *__sig)
 {
-  int fl1, fl2;
+  unsigned int __eax, __ebx, __ecx, __edx;
 
 #ifndef __x86_64__
+#if __GNUC__ >= 3
   /* See if we can use cpuid.  On AMD64 we always can.  */
-  __asm__ ("pushfl; pushfl; popl %0; movl %0,%1; xorl %2,%0;"
-	   "pushl %0; popfl; pushfl; popl %0; popfl"
-	   : "=&r" (fl1), "=&r" (fl2)
+  __asm__ ("pushf{l|d}\n\t"
+	   "pushf{l|d}\n\t"
+	   "pop{l}\t%0\n\t"
+	   "mov{l}\t{%0, %1|%1, %0}\n\t"
+	   "xor{l}\t{%2, %0|%0, %2}\n\t"
+	   "push{l}\t%0\n\t"
+	   "popf{l|d}\n\t"
+	   "pushf{l|d}\n\t"
+	   "pop{l}\t%0\n\t"
+	   "popf{l|d}\n\t"
+	   : "=&r" (__eax), "=&r" (__ebx)
+	   : "i" (0x00200000));
+#else
+/* Host GCCs older than 3.0 weren't supporting Intel asm syntax
+   nor alternatives in i386 code.  */
+  __asm__ ("pushfl\n\t"
+	   "pushfl\n\t"
+	   "popl\t%0\n\t"
+	   "movl\t%0, %1\n\t"
+	   "xorl\t%2, %0\n\t"
+	   "pushl\t%0\n\t"
+	   "popfl\n\t"
+	   "pushfl\n\t"
+	   "popl\t%0\n\t"
+	   "popfl\n\t"
+	   : "=&r" (__eax), "=&r" (__ebx)
 	   : "i" (0x00200000));
-  if (((fl1 ^ fl2) & 0x00200000) == 0)
-    return (0);
 #endif
 
-  /* Host supports cpuid.  See if cpuid gives capabilities, try
-     CPUID(0).  Preserve %ebx and %ecx; cpuid insn clobbers these, we
-     don't need their CPUID values here, and %ebx may be the PIC
-     register.  */
-#ifdef __x86_64__
-  __asm__ ("pushq %%rcx; pushq %%rbx; cpuid; popq %%rbx; popq %%rcx"
-	   : "=a" (fl1) : "0" (0) : "rdx", "cc");
-#else
-  __asm__ ("pushl %%ecx; pushl %%ebx; cpuid; popl %%ebx; popl %%ecx"
-	   : "=a" (fl1) : "0" (0) : "edx", "cc");
+  if (!((__eax ^ __ebx) & 0x00200000))
+    return 0;
 #endif
-  if (fl1 == 0)
-    return (0);
-
-  /* Invoke CPUID(1), return %edx; caller can examine bits to
-     determine what's supported.  */
-#ifdef __x86_64__
-  __asm__ ("pushq %%rcx; pushq %%rbx; cpuid; popq %%rbx; popq %%rcx"
-	   : "=d" (fl2), "=a" (fl1) : "1" (1) : "cc");
-#else
-  __asm__ ("pushl %%ecx; pushl %%ebx; cpuid; popl %%ebx; popl %%ecx"
-	   : "=d" (fl2), "=a" (fl1) : "1" (1) : "cc");
+
+  /* Host supports cpuid.  Return highest supported cpuid input value.  */
+  __cpuid (__ext, __eax, __ebx, __ecx, __edx);
+
+  if (__sig)
+    *__sig = __ebx;
+
+  return __eax;
+}
+
+/* Return cpuid data for requested cpuid level, as found in returned
+   eax, ebx, ecx and edx registers.  The function checks if cpuid is
+   supported and returns 1 for valid cpuid information or 0 for
+   unsupported cpuid level.  All pointers are required to be non-null.  */
+
+static __inline int
+__get_cpuid (unsigned int __level,
+	     unsigned int *__eax, unsigned int *__ebx,
+	     unsigned int *__ecx, unsigned int *__edx)
+{
+  unsigned int __ext = __level & 0x80000000;
+
+  if (__get_cpuid_max (__ext, 0) < __level)
+    return 0;
+
+  __cpuid (__level, *__eax, *__ebx, *__ecx, *__edx);
+  return 1;
+}
+
+#ifndef NOINLINE
+#define NOINLINE __attribute__ ((noinline))
 #endif
 
-  return fl2;
+unsigned int i386_cpuid (void) NOINLINE;
+
+unsigned int NOINLINE
+i386_cpuid (void)
+{
+  unsigned int eax, ebx, ecx, edx;
+
+  if (!__get_cpuid (1, &eax, &ebx, &ecx, &edx))
+    return 0;
+
+  return edx;
 }