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Add knowledge about a few more runtime functions

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git-svn-id: svn://svn.cc65.org/cc65/trunk@52 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz 2000-06-10 16:32:54 +00:00
parent 699a7cbf3f
commit e932798ead
1 changed files with 96 additions and 3 deletions
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99
src/cc65/optimize.c
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@ -3520,7 +3520,7 @@ static void OptTriples (void)
"\tjsr\tldaxysp",
"\tjsr\tldax0sp",
"\tjsr\tldaysp",
"\tjsr\tleaysp",
"\tjsr\tleaasp",
"\tjsr\tldaxi",
0
};
@ -3536,7 +3536,7 @@ static void OptTriples (void)
"\tjsr\tpushwysp",
"\tjsr\tpushw0sp",
"\tjsr\tpushbysp",
"\tjsr\tpleaysp",
"\tjsr\tpleaasp",
"\tjsr\tpushw",
};
@ -3648,6 +3648,27 @@ static Line* OptOneBlock (Line* L)
/* We know about this function */
A = X = -1;
INC (Y, 1);
} else if (LineFullMatch (L, "\tjsr\taxulong")) {
/* We know about this function and we're trying to replace it by
* inline code if we have already a register that contains zero.
*/
char C;
if (A == 0) {
C = 'a';
} else if (X == 0) {
C = 'x';
} else if (Y == 0) {
C = 'y';
} else {
C = '\0';
}
if (C == '\0') {
/* We cannot replace the code, but we know about the results */
Y = 0;
} else {
L = ReplaceLine (L, "\tst%c\tsreg", C);
NewLineAfter (L, "\tst%c\tsreg+1", C);
}
} else if (LineFullMatch (L, "\tjsr\tbnega")) {
/* We know about this function */
A = -1;
@ -3660,12 +3681,35 @@ static Line* OptOneBlock (Line* L)
/* We know about this function */
A = -1;
X = 0;
} else if (LineFullMatch (L, "\tjsr\tcomplax")) {
/* We know about this function */
if (A != -1) {
A ^= 0xFF;
}
if (X != -1) {
X ^= 0xFF;
}
} else if (LineFullMatch (L, "\tjsr\tdecax1")) {
/* We know about this function */
A = X = -1;
} else if (LineFullMatch (L, "\tjsr\tdecax2")) {
/* We know about this function */
A = X = -1;
} else if (LineFullMatch (L, "\tjsr\tdecaxy")) {
/* We know about this function */
A = X = -1;
} else if (LineFullMatch (L, "\tjsr\tdeceaxy")) {
/* We know about this function */
A = X = -1;
} else if (LineFullMatch (L, "\tjsr\tincax1")) {
/* We know about this function */
A = X = -1;
} else if (LineFullMatch (L, "\tjsr\tincax2")) {
/* We know about this function */
A = X = -1;
} else if (LineFullMatch (L, "\tjsr\tinceaxy")) {
/* We know about this function */
A = X = -1;
} else if (LineFullMatch (L, "\tjsr\tladdeq")) {
/* We know about this function */
A = X = -1;
@ -3674,6 +3718,17 @@ static Line* OptOneBlock (Line* L)
/* We know about this function */
A = X = -1;
Y = 3;
} else if (LineFullMatch (L, "\tjsr\tlbneg")) {
/* We know about this function */
A = -1;
X = 0;
} else if (LineFullMatch (L, "\tjsr\tldai")) {
/* We know about this function */
A = X = -1;
Y = 0;
} else if (LineFullMatch (L, "\tjsr\tldaidx")) {
/* We know about this function */
A = X = -1;
} else if (LineFullMatch (L, "\tjsr\tldau00sp")) {
/* We know about this function */
A = -1;
@ -3734,6 +3789,12 @@ static Line* OptOneBlock (Line* L)
/* We know about this function */
A = X = -1;
Y = 3;
} else if (LineFullMatch (L, "\tjsr\tnegax")) {
/* We know about this function */
A = X = -1;
} else if (LineFullMatch (L, "\tjsr\tnegeax")) {
/* We know about this function */
A = X = -1;
} else if (LineFullMatch (L, "\tjsr\tpush0")) {
/* We know about this function */
A = 0;
@ -3822,12 +3883,36 @@ static Line* OptOneBlock (Line* L)
/* We know about this function (calls pushax) */
A = X = -1;
Y = 1;
} else if (LineFullMatch (L, "\tjsr\tresteax")) {
/* We know about this function */
A = X = -1;
} else if (LineFullMatch (L, "\tjsr\tsaveeax")) {
/* We know about this function */
/* Changes nothing */
} else if (LineFullMatch (L, "\tjsr\tshrax1")) {
/* We know about this function */
A = X = -1;
} else if (LineFullMatch (L, "\tjsr\tshrax2")) {
/* We know about this function */
A = X = -1;
} else if (LineFullMatch (L, "\tjsr\tshrax3")) {
/* We know about this function */
A = X = -1;
} else if (LineFullMatch (L, "\tjsr\tshreax1")) {
/* We know about this function */
A = X = -1;
} else if (LineFullMatch (L, "\tjsr\tshreax2")) {
/* We know about this function */
A = X = -1;
} else if (LineFullMatch (L, "\tjsr\tshreax3")) {
/* We know about this function */
A = X = -1;
} else if (LineFullMatch (L, "\tjsr\tstaspp")) {
/* We know about this function */
Y = -1;
} else if (LineFullMatch (L, "\tjsr\tstaxspp")) {
/* We know about this function */
Y = -1;
Y = -1;
} else if (LineFullMatch (L, "\tjsr\tstax0sp")) {
/* We know about this function */
Y = 1;
@ -3842,6 +3927,14 @@ static Line* OptOneBlock (Line* L)
/* We know about this function */
A = X = -1;
INC (Y, 1);
} else if (LineFullMatch (L, "\tjsr\ttosadda0")) {
/* We know about this function */
A = X = -1;
Y = 1;
} else if (LineFullMatch (L, "\tjsr\ttosaddax")) {
/* We know about this function */
A = X = -1;
Y = 1;
} else if (LineFullMatch (L, "\tjsr\ttosicmp")) {
/* We know about this function */
A = X = -1;