misc stuff

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@5468 8ced0084-cf51-0410-be5f-012b33b47a6e

3 files changed, 4 insertions, 11 deletions

diff --git a/Source/Core/DSPCore/Src/DSPIntExtOps.cpp b/Source/Core/DSPCore/Src/DSPIntExtOps.cpp
index 690dccf0a3..0928d57af7 100644
--- a/Source/Core/DSPCore/Src/DSPIntExtOps.cpp
+++ b/Source/Core/DSPCore/Src/DSPIntExtOps.cpp
@@ -19,22 +19,14 @@
 #include "DSPIntExtOps.h"
 
 // Extended opcodes do not exist on their own. These opcodes can only be
-// attached to opcodes that allow extending (8 lower bits of opcode not used by
+// attached to opcodes that allow extending (8 (or 7) lower bits of opcode not used by
 // opcode). Extended opcodes do not modify program counter $pc register.
 
 // Most of the suffixes increment or decrement one or more addressing registers
 // (the first four, ARx). The increment/decrement is either 1, or the
 // corresponding "index" register (the second four, IXx). The addressing
 // registers will wrap in odd ways, dictated by the corresponding wrapping
-// register, WP0-3.
-
-// The following should be applied as a decrement (and is applied by
-// dsp_decrement_addr_reg):
-// ar[i] = (ar[i] & wp[i]) == 0 ? ar[i] | wp[i] : ar[i] - 1;
-// I have not found the corresponding algorithms for increments yet.
-// It's gotta be fairly simple though. See R3123, R3125 in Google Code.
-// (May have something to do with (ar[i] ^ wp[i]) == 0)
-
+// register, WR0-3.
 
 namespace DSPInterpreter
 {
diff --git a/Source/Core/DSPCore/Src/DSPIntUtil.h b/Source/Core/DSPCore/Src/DSPIntUtil.h
index c48b049403..4c19b5955a 100644
--- a/Source/Core/DSPCore/Src/DSPIntUtil.h
+++ b/Source/Core/DSPCore/Src/DSPIntUtil.h
@@ -57,6 +57,7 @@ inline bool dsp_SR_is_flag_set(int flag)
 //
 // increment, decrement 100% ok (as far as i can tell), increase, decrease still probs
 
+// NextPowerOf2()-1
 inline u16 ToMask(u16 a)
 {
 	a = a | (a >> 8);
diff --git a/Source/Core/DSPCore/Src/DSPTables.cpp b/Source/Core/DSPCore/Src/DSPTables.cpp
index 97b8aabd5d..486ac7e6d0 100644
--- a/Source/Core/DSPCore/Src/DSPTables.cpp
+++ b/Source/Core/DSPCore/Src/DSPTables.cpp
@@ -205,7 +205,6 @@ const DSPOPCTemplate opcodes[] =
 	{"SRS",		0x2800, 0xf800, DSPInterpreter::srs, NULL, 1, 2, {{P_MEM, 1, 0, 0, 0x00ff}, {P_REG18, 1, 0, 8, 0x0700}}, false, false},
 
 // opcodes that can be extended
-// extended opcodes, note size of opcode will be set to 0
 
 	//3 - main opcode defined by 9 bits, extension defined by last 7 bits!!
 	{"XORR",    0x3000, 0xfc80, DSPInterpreter::xorr,	NULL, 1 , 2, {{P_ACCM, 1, 0, 8, 0x0100},{P_REG1A,  1, 0, 9, 0x0200}}, true, false},
@@ -303,6 +302,7 @@ const DSPOPCTemplate opcodes[] =
 const DSPOPCTemplate cw = 
 	{"CW",		0x0000, 0x0000, NULL, NULL, 1, 1, {{P_VAL, 2, 0, 0, 0xffff}}, false, false};
 
+// extended opcodes
 
 const DSPOPCTemplate opcodes_ext[] =
 {