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Add some comments and a little utility to convert ARM conditions to strings. 

llvm-svn: 124898
This commit is contained in:
Johnny Chen 2011-02-04 21:27:54 +00:00
parent 72b77ebc8a
commit 2246ff143b
1 changed files with 38 additions and 16 deletions
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54
lldb/source/Plugins/Process/Utility/ARMDefines.h
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@ -16,26 +16,48 @@
namespace lldb_private {
// ARM conditions
#define COND_EQ 0x0
#define COND_NE 0x1
#define COND_CS 0x2
// ARM conditions // Meaning (integer) Meaning (floating-point) Condition flags
#define COND_EQ 0x0 // Equal Equal Z == 1
#define COND_NE 0x1 // Not equal Not equal, or unordered Z == 0
#define COND_CS 0x2 // Carry set >, ==, or unordered C == 1
#define COND_HS 0x2
#define COND_CC 0x3
#define COND_CC 0x3 // Carry clear Less than C == 0
#define COND_LO 0x3
#define COND_MI 0x4
#define COND_PL 0x5
#define COND_VS 0x6
#define COND_VC 0x7
#define COND_HI 0x8
#define COND_LS 0x9
#define COND_GE 0xA
#define COND_LT 0xB
#define COND_GT 0xC
#define COND_LE 0xD
#define COND_AL 0xE
#define COND_MI 0x4 // Minus, negative Less than N == 1
#define COND_PL 0x5 // Plus, positive or zero >, ==, or unordered N == 0
#define COND_VS 0x6 // Overflow Unordered V == 1
#define COND_VC 0x7 // No overflow Not unordered V == 0
#define COND_HI 0x8 // Unsigned higher Greater than, or unordered C == 1 and Z == 0
#define COND_LS 0x9 // Unsigned lower or same Less than or equal C == 0 or Z == 1
#define COND_GE 0xA // Greater than or equal Greater than or equal N == V
#define COND_LT 0xB // Less than Less than, or unordered N != V
#define COND_GT 0xC // Greater than Greater than Z == 0 and N == V
#define COND_LE 0xD // Less than or equal <, ==, or unordered Z == 1 or N != V
#define COND_AL 0xE // Always (unconditional) Always (unconditional) Any
#define COND_UNCOND 0xF
static inline const char *ARMCondCodeToString(uint32_t CC)
{
switch (CC) {
default: assert(0 && "Unknown condition code");
case COND_EQ: return "eq";
case COND_NE: return "ne";
case COND_HS: return "hs";
case COND_LO: return "lo";
case COND_MI: return "mi";
case COND_PL: return "pl";
case COND_VS: return "vs";
case COND_VC: return "vc";
case COND_HI: return "hi";
case COND_LS: return "ls";
case COND_GE: return "ge";
case COND_LT: return "lt";
case COND_GT: return "gt";
case COND_LE: return "le";
case COND_AL: return "al";
}
}
// Masks for CPSR
#define MASK_CPSR_MODE_MASK (0x0000001fu)
#define MASK_CPSR_T (1u << 5)