[PPC64] Added vector registers.

The Registers_ppc64 class needed a couple of changes, both to accommodate the
new registers as well as to handle the overlaps of VS register set
without wasting space.

The save/restore code of V and VS registers was added.
As VS registers depend on the VMX extension, they are processed only if
VMX support is detected (_ARCH_PWR8 for now).

Patch by Leandro Lupori!

Differential Revision: https://reviews.llvm.org/D41906

llvm-svn: 322596

2 files changed, 185 insertions, 115 deletions

diff --git a/libunwind/include/__libunwind_config.h b/libunwind/include/__libunwind_config.h
index 9736b7aad84..6ae0166b77e 100644
--- a/libunwind/include/__libunwind_config.h
+++ b/libunwind/include/__libunwind_config.h
@@ -18,7 +18,7 @@
 #define _LIBUNWIND_HIGHEST_DWARF_REGISTER_X86       8
 #define _LIBUNWIND_HIGHEST_DWARF_REGISTER_X86_64    32
 #define _LIBUNWIND_HIGHEST_DWARF_REGISTER_PPC       112
-#define _LIBUNWIND_HIGHEST_DWARF_REGISTER_PPC64     110
+#define _LIBUNWIND_HIGHEST_DWARF_REGISTER_PPC64     116
 #define _LIBUNWIND_HIGHEST_DWARF_REGISTER_ARM64     95
 #define _LIBUNWIND_HIGHEST_DWARF_REGISTER_ARM       287
 #define _LIBUNWIND_HIGHEST_DWARF_REGISTER_OR1K      31
@@ -42,8 +42,8 @@
 #  define _LIBUNWIND_HIGHEST_DWARF_REGISTER _LIBUNWIND_HIGHEST_DWARF_REGISTER_X86_64
 # elif defined(__powerpc64__)
 #  define _LIBUNWIND_TARGET_PPC64 1
-#  define _LIBUNWIND_CONTEXT_SIZE 136
-#  define _LIBUNWIND_CURSOR_SIZE 148
+#  define _LIBUNWIND_CONTEXT_SIZE 167
+#  define _LIBUNWIND_CURSOR_SIZE 179
 #  define _LIBUNWIND_HIGHEST_DWARF_REGISTER _LIBUNWIND_HIGHEST_DWARF_REGISTER_PPC64
 # elif defined(__ppc__)
 #  define _LIBUNWIND_TARGET_PPC 1
@@ -96,8 +96,8 @@
 # define _LIBUNWIND_TARGET_OR1K 1
 # define _LIBUNWIND_TARGET_MIPS_O32 1
 # define _LIBUNWIND_TARGET_MIPS_NEWABI 1
-# define _LIBUNWIND_CONTEXT_SIZE 136
-# define _LIBUNWIND_CURSOR_SIZE 148
+# define _LIBUNWIND_CONTEXT_SIZE 167
+# define _LIBUNWIND_CURSOR_SIZE 179
 # define _LIBUNWIND_HIGHEST_DWARF_REGISTER 287
 #endif // _LIBUNWIND_IS_NATIVE_ONLY
 
diff --git a/libunwind/include/libunwind.h b/libunwind/include/libunwind.h
index 29cf62e4335..04e31e8ea4e 100644
--- a/libunwind/include/libunwind.h
+++ b/libunwind/include/libunwind.h
@@ -327,116 +327,186 @@ enum {
 
 // 64-bit ppc register numbers
 enum {
-  UNW_PPC64_R0  = 0,
-  UNW_PPC64_R1  = 1,
-  UNW_PPC64_R2  = 2,
-  UNW_PPC64_R3  = 3,
-  UNW_PPC64_R4  = 4,
-  UNW_PPC64_R5  = 5,
-  UNW_PPC64_R6  = 6,
-  UNW_PPC64_R7  = 7,
-  UNW_PPC64_R8  = 8,
-  UNW_PPC64_R9  = 9,
-  UNW_PPC64_R10 = 10,
-  UNW_PPC64_R11 = 11,
-  UNW_PPC64_R12 = 12,
-  UNW_PPC64_R13 = 13,
-  UNW_PPC64_R14 = 14,
-  UNW_PPC64_R15 = 15,
-  UNW_PPC64_R16 = 16,
-  UNW_PPC64_R17 = 17,
-  UNW_PPC64_R18 = 18,
-  UNW_PPC64_R19 = 19,
-  UNW_PPC64_R20 = 20,
-  UNW_PPC64_R21 = 21,
-  UNW_PPC64_R22 = 22,
-  UNW_PPC64_R23 = 23,
-  UNW_PPC64_R24 = 24,
-  UNW_PPC64_R25 = 25,
-  UNW_PPC64_R26 = 26,
-  UNW_PPC64_R27 = 27,
-  UNW_PPC64_R28 = 28,
-  UNW_PPC64_R29 = 29,
-  UNW_PPC64_R30 = 30,
-  UNW_PPC64_R31 = 31,
-  UNW_PPC64_F0  = 32,
-  UNW_PPC64_F1  = 33,
-  UNW_PPC64_F2  = 34,
-  UNW_PPC64_F3  = 35,
-  UNW_PPC64_F4  = 36,
-  UNW_PPC64_F5  = 37,
-  UNW_PPC64_F6  = 38,
-  UNW_PPC64_F7  = 39,
-  UNW_PPC64_F8  = 40,
-  UNW_PPC64_F9  = 41,
-  UNW_PPC64_F10 = 42,
-  UNW_PPC64_F11 = 43,
-  UNW_PPC64_F12 = 44,
-  UNW_PPC64_F13 = 45,
-  UNW_PPC64_F14 = 46,
-  UNW_PPC64_F15 = 47,
-  UNW_PPC64_F16 = 48,
-  UNW_PPC64_F17 = 49,
-  UNW_PPC64_F18 = 50,
-  UNW_PPC64_F19 = 51,
-  UNW_PPC64_F20 = 52,
-  UNW_PPC64_F21 = 53,
-  UNW_PPC64_F22 = 54,
-  UNW_PPC64_F23 = 55,
-  UNW_PPC64_F24 = 56,
-  UNW_PPC64_F25 = 57,
-  UNW_PPC64_F26 = 58,
-  UNW_PPC64_F27 = 59,
-  UNW_PPC64_F28 = 60,
-  UNW_PPC64_F29 = 61,
-  UNW_PPC64_F30 = 62,
-  UNW_PPC64_F31 = 63,
-  UNW_PPC64_LR  = 64,
-  UNW_PPC64_CTR = 65,
-  UNW_PPC64_CR0 = 66,
-  UNW_PPC64_CR1 = 67,
-  UNW_PPC64_CR2 = 68,
-  UNW_PPC64_CR3 = 69,
-  UNW_PPC64_CR4 = 70,
-  UNW_PPC64_CR5 = 71,
-  UNW_PPC64_CR6 = 72,
-  UNW_PPC64_CR7 = 73,
-  UNW_PPC64_XER = 74,
-  UNW_PPC64_V0  = 75,
-  UNW_PPC64_V1  = 76,
-  UNW_PPC64_V2  = 77,
-  UNW_PPC64_V3  = 78,
-  UNW_PPC64_V4  = 79,
-  UNW_PPC64_V5  = 80,
-  UNW_PPC64_V6  = 81,
-  UNW_PPC64_V7  = 82,
-  UNW_PPC64_V8  = 83,
-  UNW_PPC64_V9  = 84,
-  UNW_PPC64_V10 = 85,
-  UNW_PPC64_V11 = 86,
-  UNW_PPC64_V12 = 87,
-  UNW_PPC64_V13 = 88,
-  UNW_PPC64_V14 = 89,
-  UNW_PPC64_V15 = 90,
-  UNW_PPC64_V16 = 91,
-  UNW_PPC64_V17 = 92,
-  UNW_PPC64_V18 = 93,
-  UNW_PPC64_V19 = 94,
-  UNW_PPC64_V20 = 95,
-  UNW_PPC64_V21 = 96,
-  UNW_PPC64_V22 = 97,
-  UNW_PPC64_V23 = 98,
-  UNW_PPC64_V24 = 99,
-  UNW_PPC64_V25 = 100,
-  UNW_PPC64_V26 = 101,
-  UNW_PPC64_V27 = 102,
-  UNW_PPC64_V28 = 103,
-  UNW_PPC64_V29 = 104,
-  UNW_PPC64_V30 = 105,
-  UNW_PPC64_V31 = 106,
-  UNW_PPC64_VRSAVE  = 107,
-  UNW_PPC64_VSCR    = 108,
-  UNW_PPC64_FPSCR   = 109
+  UNW_PPC64_R0      = 0,
+  UNW_PPC64_R1      = 1,
+  UNW_PPC64_R2      = 2,
+  UNW_PPC64_R3      = 3,
+  UNW_PPC64_R4      = 4,
+  UNW_PPC64_R5      = 5,
+  UNW_PPC64_R6      = 6,
+  UNW_PPC64_R7      = 7,
+  UNW_PPC64_R8      = 8,
+  UNW_PPC64_R9      = 9,
+  UNW_PPC64_R10     = 10,
+  UNW_PPC64_R11     = 11,
+  UNW_PPC64_R12     = 12,
+  UNW_PPC64_R13     = 13,
+  UNW_PPC64_R14     = 14,
+  UNW_PPC64_R15     = 15,
+  UNW_PPC64_R16     = 16,
+  UNW_PPC64_R17     = 17,
+  UNW_PPC64_R18     = 18,
+  UNW_PPC64_R19     = 19,
+  UNW_PPC64_R20     = 20,
+  UNW_PPC64_R21     = 21,
+  UNW_PPC64_R22     = 22,
+  UNW_PPC64_R23     = 23,
+  UNW_PPC64_R24     = 24,
+  UNW_PPC64_R25     = 25,
+  UNW_PPC64_R26     = 26,
+  UNW_PPC64_R27     = 27,
+  UNW_PPC64_R28     = 28,
+  UNW_PPC64_R29     = 29,
+  UNW_PPC64_R30     = 30,
+  UNW_PPC64_R31     = 31,
+  UNW_PPC64_F0      = 32,
+  UNW_PPC64_F1      = 33,
+  UNW_PPC64_F2      = 34,
+  UNW_PPC64_F3      = 35,
+  UNW_PPC64_F4      = 36,
+  UNW_PPC64_F5      = 37,
+  UNW_PPC64_F6      = 38,
+  UNW_PPC64_F7      = 39,
+  UNW_PPC64_F8      = 40,
+  UNW_PPC64_F9      = 41,
+  UNW_PPC64_F10     = 42,
+  UNW_PPC64_F11     = 43,
+  UNW_PPC64_F12     = 44,
+  UNW_PPC64_F13     = 45,
+  UNW_PPC64_F14     = 46,
+  UNW_PPC64_F15     = 47,
+  UNW_PPC64_F16     = 48,
+  UNW_PPC64_F17     = 49,
+  UNW_PPC64_F18     = 50,
+  UNW_PPC64_F19     = 51,
+  UNW_PPC64_F20     = 52,
+  UNW_PPC64_F21     = 53,
+  UNW_PPC64_F22     = 54,
+  UNW_PPC64_F23     = 55,
+  UNW_PPC64_F24     = 56,
+  UNW_PPC64_F25     = 57,
+  UNW_PPC64_F26     = 58,
+  UNW_PPC64_F27     = 59,
+  UNW_PPC64_F28     = 60,
+  UNW_PPC64_F29     = 61,
+  UNW_PPC64_F30     = 62,
+  UNW_PPC64_F31     = 63,
+  // 64: reserved
+  UNW_PPC64_LR      = 65,
+  UNW_PPC64_CTR     = 66,
+  // 67: reserved
+  UNW_PPC64_CR0     = 68,
+  UNW_PPC64_CR1     = 69,
+  UNW_PPC64_CR2     = 70,
+  UNW_PPC64_CR3     = 71,
+  UNW_PPC64_CR4     = 72,
+  UNW_PPC64_CR5     = 73,
+  UNW_PPC64_CR6     = 74,
+  UNW_PPC64_CR7     = 75,
+  UNW_PPC64_XER     = 76,
+  UNW_PPC64_V0      = 77,
+  UNW_PPC64_V1      = 78,
+  UNW_PPC64_V2      = 79,
+  UNW_PPC64_V3      = 80,
+  UNW_PPC64_V4      = 81,
+  UNW_PPC64_V5      = 82,
+  UNW_PPC64_V6      = 83,
+  UNW_PPC64_V7      = 84,
+  UNW_PPC64_V8      = 85,
+  UNW_PPC64_V9      = 86,
+  UNW_PPC64_V10     = 87,
+  UNW_PPC64_V11     = 88,
+  UNW_PPC64_V12     = 89,
+  UNW_PPC64_V13     = 90,
+  UNW_PPC64_V14     = 91,
+  UNW_PPC64_V15     = 92,
+  UNW_PPC64_V16     = 93,
+  UNW_PPC64_V17     = 94,
+  UNW_PPC64_V18     = 95,
+  UNW_PPC64_V19     = 96,
+  UNW_PPC64_V20     = 97,
+  UNW_PPC64_V21     = 98,
+  UNW_PPC64_V22     = 99,
+  UNW_PPC64_V23     = 100,
+  UNW_PPC64_V24     = 101,
+  UNW_PPC64_V25     = 102,
+  UNW_PPC64_V26     = 103,
+  UNW_PPC64_V27     = 104,
+  UNW_PPC64_V28     = 105,
+  UNW_PPC64_V29     = 106,
+  UNW_PPC64_V30     = 107,
+  UNW_PPC64_V31     = 108,
+  // 109, 111-113: OpenPOWER ELF V2 ABI: reserved
+  // Borrowing VRSAVE number from PPC32.
+  UNW_PPC64_VRSAVE  = 109,
+  UNW_PPC64_VSCR    = 110,
+  UNW_PPC64_TFHAR   = 114,
+  UNW_PPC64_TFIAR   = 115,
+  UNW_PPC64_TEXASR  = 116,
+  UNW_PPC64_VS0     = UNW_PPC64_F0,
+  UNW_PPC64_VS1     = UNW_PPC64_F1,
+  UNW_PPC64_VS2     = UNW_PPC64_F2,
+  UNW_PPC64_VS3     = UNW_PPC64_F3,
+  UNW_PPC64_VS4     = UNW_PPC64_F4,
+  UNW_PPC64_VS5     = UNW_PPC64_F5,
+  UNW_PPC64_VS6     = UNW_PPC64_F6,
+  UNW_PPC64_VS7     = UNW_PPC64_F7,
+  UNW_PPC64_VS8     = UNW_PPC64_F8,
+  UNW_PPC64_VS9     = UNW_PPC64_F9,
+  UNW_PPC64_VS10    = UNW_PPC64_F10,
+  UNW_PPC64_VS11    = UNW_PPC64_F11,
+  UNW_PPC64_VS12    = UNW_PPC64_F12,
+  UNW_PPC64_VS13    = UNW_PPC64_F13,
+  UNW_PPC64_VS14    = UNW_PPC64_F14,
+  UNW_PPC64_VS15    = UNW_PPC64_F15,
+  UNW_PPC64_VS16    = UNW_PPC64_F16,
+  UNW_PPC64_VS17    = UNW_PPC64_F17,
+  UNW_PPC64_VS18    = UNW_PPC64_F18,
+  UNW_PPC64_VS19    = UNW_PPC64_F19,
+  UNW_PPC64_VS20    = UNW_PPC64_F20,
+  UNW_PPC64_VS21    = UNW_PPC64_F21,
+  UNW_PPC64_VS22    = UNW_PPC64_F22,
+  UNW_PPC64_VS23    = UNW_PPC64_F23,
+  UNW_PPC64_VS24    = UNW_PPC64_F24,
+  UNW_PPC64_VS25    = UNW_PPC64_F25,
+  UNW_PPC64_VS26    = UNW_PPC64_F26,
+  UNW_PPC64_VS27    = UNW_PPC64_F27,
+  UNW_PPC64_VS28    = UNW_PPC64_F28,
+  UNW_PPC64_VS29    = UNW_PPC64_F29,
+  UNW_PPC64_VS30    = UNW_PPC64_F30,
+  UNW_PPC64_VS31    = UNW_PPC64_F31,
+  UNW_PPC64_VS32    = UNW_PPC64_V0,
+  UNW_PPC64_VS33    = UNW_PPC64_V1,
+  UNW_PPC64_VS34    = UNW_PPC64_V2,
+  UNW_PPC64_VS35    = UNW_PPC64_V3,
+  UNW_PPC64_VS36    = UNW_PPC64_V4,
+  UNW_PPC64_VS37    = UNW_PPC64_V5,
+  UNW_PPC64_VS38    = UNW_PPC64_V6,
+  UNW_PPC64_VS39    = UNW_PPC64_V7,
+  UNW_PPC64_VS40    = UNW_PPC64_V8,
+  UNW_PPC64_VS41    = UNW_PPC64_V9,
+  UNW_PPC64_VS42    = UNW_PPC64_V10,
+  UNW_PPC64_VS43    = UNW_PPC64_V11,
+  UNW_PPC64_VS44    = UNW_PPC64_V12,
+  UNW_PPC64_VS45    = UNW_PPC64_V13,
+  UNW_PPC64_VS46    = UNW_PPC64_V14,
+  UNW_PPC64_VS47    = UNW_PPC64_V15,
+  UNW_PPC64_VS48    = UNW_PPC64_V16,
+  UNW_PPC64_VS49    = UNW_PPC64_V17,
+  UNW_PPC64_VS50    = UNW_PPC64_V18,
+  UNW_PPC64_VS51    = UNW_PPC64_V19,
+  UNW_PPC64_VS52    = UNW_PPC64_V20,
+  UNW_PPC64_VS53    = UNW_PPC64_V21,
+  UNW_PPC64_VS54    = UNW_PPC64_V22,
+  UNW_PPC64_VS55    = UNW_PPC64_V23,
+  UNW_PPC64_VS56    = UNW_PPC64_V24,
+  UNW_PPC64_VS57    = UNW_PPC64_V25,
+  UNW_PPC64_VS58    = UNW_PPC64_V26,
+  UNW_PPC64_VS59    = UNW_PPC64_V27,
+  UNW_PPC64_VS60    = UNW_PPC64_V28,
+  UNW_PPC64_VS61    = UNW_PPC64_V29,
+  UNW_PPC64_VS62    = UNW_PPC64_V30,
+  UNW_PPC64_VS63    = UNW_PPC64_V31
 };
 
 // 64-bit ARM64 registers