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Merge pull request #2069 from lioncash/docs 

PowerPC: Document the instruction table flags
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Lioncash 2015-02-18 00:26:42 -05:00
parent 127e742992 0b3a2ae4ca
commit 373b1d9915
1 changed files with 33 additions and 32 deletions
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65
Source/Core/Core/PowerPC/PPCTables.h
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@ -7,50 +7,51 @@
#include "Core/PowerPC/Gekko.h" #include "Core/PowerPC/Gekko.h"
#include "Core/PowerPC/Interpreter/Interpreter.h" #include "Core/PowerPC/Interpreter/Interpreter.h"
// Flags that indicate what an instruction can do.
enum enum
{ {
FL_SET_CR0 = (1<<0), // FL_SET_CR0 = (1<<0), // Sets CR0.
FL_SET_CR1 = (1<<1), // FL_SET_CR1 = (1<<1), // Sets CR1.
FL_SET_CRn = (1<<2), // FL_SET_CRn = (1<<2), // Encoding decides which CR can be set.
FL_SET_CRx = FL_SET_CR0 | FL_SET_CR1 | FL_SET_CRn, // FL_SET_CRx = FL_SET_CR0 | FL_SET_CR1 | FL_SET_CRn,
FL_SET_CA = (1<<3), // carry FL_SET_CA = (1<<3), // Sets the carry flag.
FL_READ_CA = (1<<4), // carry FL_READ_CA = (1<<4), // Reads the carry flag.
FL_RC_BIT = (1<<5), FL_RC_BIT = (1<<5), // Sets the record bit.
FL_RC_BIT_F = (1<<6), FL_RC_BIT_F = (1<<6), // Sets the record bit. Used for floatig point instructions that do this.
FL_ENDBLOCK = (1<<7), FL_ENDBLOCK = (1<<7), // Specifies the end of a JIT block.
FL_IN_A = (1<<8), FL_IN_A = (1<<8), // Uses rA as an input.
FL_IN_A0 = (1<<9), FL_IN_A0 = (1<<9), // Uses rA as an input. Indicates when rA is used with an instruction, it's treated as if it has the value zero in it.
FL_IN_B = (1<<10), FL_IN_B = (1<<10), // Uses rB as an input.
FL_IN_C = (1<<11), FL_IN_C = (1<<11), // Uses rC as an input.
FL_IN_S = (1<<12), FL_IN_S = (1<<12), // Uses rS as an input.
FL_IN_AB = FL_IN_A | FL_IN_B, FL_IN_AB = FL_IN_A | FL_IN_B,
FL_IN_AC = FL_IN_A | FL_IN_C, FL_IN_AC = FL_IN_A | FL_IN_C,
FL_IN_ABC = FL_IN_A | FL_IN_B | FL_IN_C, FL_IN_ABC = FL_IN_A | FL_IN_B | FL_IN_C,
FL_IN_SB = FL_IN_S | FL_IN_B, FL_IN_SB = FL_IN_S | FL_IN_B,
FL_IN_A0B = FL_IN_A0 | FL_IN_B, FL_IN_A0B = FL_IN_A0 | FL_IN_B,
FL_IN_A0BC = FL_IN_A0 | FL_IN_B | FL_IN_C, FL_IN_A0BC = FL_IN_A0 | FL_IN_B | FL_IN_C,
FL_OUT_D = (1<<13), FL_OUT_D = (1<<13), // rD is used as a destination.
FL_OUT_S = FL_OUT_D, FL_OUT_S = FL_OUT_D, // rS is used as a destination.
FL_OUT_A = (1<<14), FL_OUT_A = (1<<14), // rA is used as a destination.
FL_OUT_AD = FL_OUT_A | FL_OUT_D, FL_OUT_AD = FL_OUT_A | FL_OUT_D,
FL_TIMER = (1<<15), FL_TIMER = (1<<15), // Used only for mftb.
FL_CHECKEXCEPTIONS = (1<<16), FL_CHECKEXCEPTIONS = (1<<16), // Used with rfi/rfid.
FL_EVIL = (1<<17), FL_EVIL = (1<<17), // Historically used to refer to instructions that messed up Super Monkey Ball.
FL_USE_FPU = (1<<18), FL_USE_FPU = (1<<18), // Used to indicate a floating point instruction.
FL_LOADSTORE = (1<<19), FL_LOADSTORE = (1<<19), // Used to indicate a load/store instruction.
FL_SET_FPRF = (1<<20), FL_SET_FPRF = (1<<20), // Sets bits in the FPRF.
FL_READ_FPRF = (1<<21), FL_READ_FPRF = (1<<21), // Reads bits from the FPRF.
FL_SET_OE = (1<<22), FL_SET_OE = (1<<22), // Sets the overflow flag.
FL_IN_FLOAT_A = (1<<23), FL_IN_FLOAT_A = (1<<23), // frA is used as an input.
FL_IN_FLOAT_B = (1<<24), FL_IN_FLOAT_B = (1<<24), // frB is used as an input.
FL_IN_FLOAT_C = (1<<25), FL_IN_FLOAT_C = (1<<25), // frC is used as an input.
FL_IN_FLOAT_S = (1<<26), FL_IN_FLOAT_S = (1<<26), // frS is used as an input.
FL_IN_FLOAT_D = (1<<27), FL_IN_FLOAT_D = (1<<27), // frD is used as an input.
FL_IN_FLOAT_AB = FL_IN_FLOAT_A | FL_IN_FLOAT_B, FL_IN_FLOAT_AB = FL_IN_FLOAT_A | FL_IN_FLOAT_B,
FL_IN_FLOAT_AC = FL_IN_FLOAT_A | FL_IN_FLOAT_C, FL_IN_FLOAT_AC = FL_IN_FLOAT_A | FL_IN_FLOAT_C,
FL_IN_FLOAT_ABC = FL_IN_FLOAT_A | FL_IN_FLOAT_B | FL_IN_FLOAT_C, FL_IN_FLOAT_ABC = FL_IN_FLOAT_A | FL_IN_FLOAT_B | FL_IN_FLOAT_C,
FL_OUT_FLOAT_D = (1<<28), FL_OUT_FLOAT_D = (1<<28), // frD is used as a destination.
FL_OUT_FLOAT_S = (1<<29), FL_OUT_FLOAT_S = (1<<29), // frS is used as a destination.
// Used in the case of double ops (they don't modify the top half of the output) // Used in the case of double ops (they don't modify the top half of the output)
FL_INOUT_FLOAT_D = FL_IN_FLOAT_D | FL_OUT_FLOAT_D, FL_INOUT_FLOAT_D = FL_IN_FLOAT_D | FL_OUT_FLOAT_D,
}; };