6502/CLK
1
0
Fork 0
mirror of https://github.com/TomHarte/CLK.git synced 2024-11-26 08:49:37 +00:00
Code Issues Projects Releases Wiki Activity

Decision: these enums will be at namespace scope.

Browse Source
This commit is contained in:
Thomas Harte 2022-03-21 10:19:30 -04:00
parent d4704c656f
commit 0b6828c895
1 changed files with 23 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
InstructionSets/PowerPC/Instruction.hpp
View File

@ -21,6 +21,29 @@ enum class CacheLine: uint32_t {
Maximum = 0b01111, Maximum = 0b01111,
}; };
enum class BranchOptions: uint32_t {
// Naming convention:
//
// Dec_ prefix => decrement the CTR;
// condition starting NotZero or Zero => test CTR;
// condition ending Set or Clear => test for condition bit.
//
// Numerical suffixes are present because there's some redundancy
// in encodings.
//
// Note that the encodings themselves may suggest alternative means
// of interpretation than mapping via this enum.
Dec_NotZeroAndClear1 = 0b00000, Dec_NotZeroAndClear2 = 0b00001,
Dec_ZeroAndClear1 = 0b00010, Dec_ZeroAndClear2 = 0b00011,
Clear1 = 0b00100, Clear2 = 0b00101,
Dec_NotZeroAndSet1 = 0b01000, Dec_NotZeroAndSet2 = 0b01001,
Dec_ZeroAndSet1 = 0b01010, Dec_ZeroAndSet2 = 0b01011,
Set1 = 0b01100, Set2 = 0b01101,
Dec_NotZero1 = 0b10000, Dec_NotZero2 = 0b10001,
Dec_Zero1 = 0b10010, Dec_Zero2 = 0b10011,
Always = 0b10100,
};
enum class Operation: uint8_t { enum class Operation: uint8_t {
Undefined, Undefined,
@ -194,29 +217,6 @@ struct Instruction {
/// Floating point register destination. /// Floating point register destination.
uint32_t frD() const { return (opcode >> 21) & 0x1f; } uint32_t frD() const { return (opcode >> 21) & 0x1f; }
enum BranchOptions: uint32_t {
// Naming convention:
//
// Dec_ prefix => decrement the CTR;
// condition starting NotZero or Zero => test CTR;
// condition ending Set or Clear => test for condition bit.
//
// Numerical suffixes are present because there's some redundancy
// in encodings.
//
// Note that the encodings themselves may suggest alternative means
// of interpretation than mapping via this enum.
Dec_NotZeroAndClear1 = 0b00000, Dec_NotZeroAndClear2 = 0b00001,
Dec_ZeroAndClear1 = 0b00010, Dec_ZeroAndClear2 = 0b00011,
Clear1 = 0b00100, Clear2 = 0b00101,
Dec_NotZeroAndSet1 = 0b01000, Dec_NotZeroAndSet2 = 0b01001,
Dec_ZeroAndSet1 = 0b01010, Dec_ZeroAndSet2 = 0b01011,
Set1 = 0b01100, Set2 = 0b01101,
Dec_NotZero1 = 0b10000, Dec_NotZero2 = 0b10001,
Dec_Zero1 = 0b10010, Dec_Zero2 = 0b10011,
Always = 0b10100,
};
/// Branch conditional options. Cf. the BranchOptions enum. /// Branch conditional options. Cf. the BranchOptions enum.
uint32_t bo() const { return (opcode >> 21) & 0x1f; } uint32_t bo() const { return (opcode >> 21) & 0x1f; }
/// Source condition register bit for branch conditionals. /// Source condition register bit for branch conditionals.