Use CPU register A for single byte parameter and returns

drmortalwombat · Jan 10, 2023 · d6fcb5f · d6fcb5f
1 parent 9a64bcc
commit d6fcb5f
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Showing 8 changed files with 227 additions and 32 deletions.
diff --git a/oscar64/Linker.cpp b/oscar64/Linker.cpp
@@ -8,7 +8,7 @@ LinkerRegion::LinkerRegion(void)
 {}
 
 LinkerSection::LinkerSection(void)
-	: mObjects(nullptr), mSections(nullptr)
+	: mObjects(nullptr), mSections(nullptr), mFlags(0)
 {}
 
 
@@ -248,7 +248,7 @@ bool LinkerRegion::Allocate(Linker * linker, LinkerObject* lobj)
 		int start = (mFreeChunks[i].mStart + lobj->mAlignment - 1) & ~(lobj->mAlignment - 1);
 		int end = start + lobj->mSize;
 
-		if (!(linker->mCompilerOptions & COPT_OPTIMIZE_CODE_SIZE) && (lobj->mFlags & LOBJF_NO_CROSS) && lobj->mSize <= 256 && (start & 0xff00) != ((end - 1) & 0xff00))
+		if (!(linker->mCompilerOptions & COPT_OPTIMIZE_CODE_SIZE) && (lobj->mFlags & LOBJF_NO_CROSS) && lobj->mSize <= 256 && (start & 0xff00) != ((end - 1) & 0xff00) && !(lobj->mSection->mFlags & LSECF_PACKED))
 			;
 		else if (end <= mFreeChunks[i].mEnd)
 		{
@@ -282,7 +282,7 @@ bool LinkerRegion::Allocate(Linker * linker, LinkerObject* lobj)
 	int start = (mStart + mUsed + lobj->mAlignment - 1) & ~(lobj->mAlignment - 1);
 	int end = start + lobj->mSize;
 
-	if (!(linker->mCompilerOptions & COPT_OPTIMIZE_CODE_SIZE) && (lobj->mFlags & LOBJF_NO_CROSS) && lobj->mSize <= 256 && (start & 0xff00) != ((end - 1) & 0xff00))
+	if (!(linker->mCompilerOptions & COPT_OPTIMIZE_CODE_SIZE) && (lobj->mFlags & LOBJF_NO_CROSS) && !(lobj->mFlags & LOBJF_FORCE_ALIGN) && lobj->mSize <= 256 && (start & 0xff00) != ((end - 1) & 0xff00) && !(lobj->mSection->mFlags & LSECF_PACKED))
 	{
 		start = (start + 0x00ff) & 0xff00;
 		end = start + lobj->mSize;

diff --git a/oscar64/Linker.h b/oscar64/Linker.h
@@ -111,6 +111,8 @@ class LinkerReference
 	uint32	mFlags;
 };
 
+static const uint32 LSECF_PACKED = 0x00000001;
+
 class LinkerSection
 {
 public:
@@ -121,6 +123,7 @@ class LinkerSection
 
 	int								mStart, mEnd, mSize;
 	LinkerSectionType				mType;
+	uint32							mFlags;
 
 	LinkerSection(void);
 
@@ -137,6 +140,15 @@ static const uint32 LOBJF_RELEVANT		= 0x00000020;
 static const uint32 LOBJF_STATIC_STACK	= 0x00000040;
 static const uint32 LOBJF_NO_CROSS		= 0x00000080;
 static const uint32 LOBJF_ZEROPAGE		= 0x00000100;
+static const uint32 LOBJF_FORCE_ALIGN	= 0x00000200;
+
+static const uint32 LOBJF_ARG_REG_A = 0x00001000;
+static const uint32 LOBJF_ARG_REG_X = 0x00002000;
+static const uint32 LOBJF_ARG_REG_Y = 0x00004000;
+
+static const uint32 LOBJF_RET_REG_A = 0x00010000;
+static const uint32 LOBJF_RET_REG_X = 0x00020000;
+
 
 class LinkerObject
 {