mirror of
https://github.com/cc65/cc65.git
synced 2025-03-27 14:32:37 +00:00
65C02 additions, saved a few bytes in the code generator
git-svn-id: svn://svn.cc65.org/cc65/trunk@80 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz
parent
409d12534b
commit
500233166a
src/cc65
@ -790,8 +790,12 @@ void g_getlocal (unsigned flags, int offs)
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case CF_CHAR:
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if ((flags & CF_FORCECHAR) || (flags & CF_TEST)) {
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ldyconst (offs);
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AddCodeLine ("\tlda\t(sp),y");
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if (CPU == CPU_65C02 && offs == 0) {
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AddCodeLine ("\tlda\t(sp)");
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} else {
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ldyconst (offs);
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AddCodeLine ("\tlda\t(sp),y");
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}
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} else {
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if (offs == 0) {
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AddCodeLine ("\tldx\t#$00");
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@ -1004,8 +1008,12 @@ void g_putlocal (unsigned flags, int offs)
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switch (flags & CF_TYPE) {
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case CF_CHAR:
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ldyconst (offs);
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AddCodeLine ("\tsta\t(sp),y");
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if (CPU == CPU_65C02 && offs == 0) {
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AddCodeLine ("\tsta\t(sp)");
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} else {
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ldyconst (offs);
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AddCodeLine ("\tsta\t(sp),y");
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}
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break;
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case CF_INT:
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@ -1275,35 +1283,35 @@ void g_scale (unsigned flags, long val)
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if (flags & CF_FORCECHAR) {
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while (p2--) {
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AddCodeLine ("\tasl\ta");
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}
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break;
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}
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/* FALLTHROUGH */
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}
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break;
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}
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/* FALLTHROUGH */
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case CF_INT:
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if (FavourSize || p2 >= 3) {
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if (flags & CF_UNSIGNED) {
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AddCodeLine ("\tjsr\tshlax%d", p2);
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} else {
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AddCodeLine ("\tjsr\taslax%d", p2);
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}
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} else {
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AddCodeLine ("\tstx\ttmp1");
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while (p2--) {
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AddCodeLine ("\tasl\ta");
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AddCodeLine ("\trol\ttmp1");
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}
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AddCodeLine ("\tldx\ttmp1");
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}
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break;
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case CF_INT:
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if (FavourSize || p2 >= 3) {
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if (flags & CF_UNSIGNED) {
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AddCodeLine ("\tjsr\tshlax%d", p2);
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} else {
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AddCodeLine ("\tjsr\taslax%d", p2);
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}
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} else {
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AddCodeLine ("\tstx\ttmp1");
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while (p2--) {
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AddCodeLine ("\tasl\ta");
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AddCodeLine ("\trol\ttmp1");
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}
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AddCodeLine ("\tldx\ttmp1");
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}
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break;
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case CF_LONG:
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if (flags & CF_UNSIGNED) {
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AddCodeLine ("\tjsr\tshleax%d", p2);
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} else {
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AddCodeLine ("\tjsr\tasleax%d", p2);
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}
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break;
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case CF_LONG:
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if (flags & CF_UNSIGNED) {
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AddCodeLine ("\tjsr\tshleax%d", p2);
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} else {
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AddCodeLine ("\tjsr\tasleax%d", p2);
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}
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break;
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default:
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typeerror (flags);
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@ -1348,7 +1356,7 @@ void g_scale (unsigned flags, long val)
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} else {
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AddCodeLine ("\tstx\ttmp1");
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while (p2--) {
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AddCodeLine ("\tlsr\ttmp1");
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AddCodeLine ("\tlsr\ttmp1");
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AddCodeLine ("\tror\ta");
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}
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AddCodeLine ("\tldx\ttmp1");
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@ -1393,7 +1401,7 @@ void g_scale (unsigned flags, long val)
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/*****************************************************************************/
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/* Adds and subs of variables fix a fixed address */
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/* Adds and subs of variables fix a fixed address */
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/*****************************************************************************/
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@ -1528,18 +1536,18 @@ void g_addeqstatic (unsigned flags, unsigned long label, unsigned offs,
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if (flags & CF_CONST) {
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if (val == 1) {
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AddCodeLine ("\tinc\t%s", lbuf);
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AddCodeLine ("\tlda\t%s", lbuf);
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} else {
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AddCodeLine ("\tlda\t%s", lbuf);
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} else {
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AddCodeLine ("\tlda\t#$%02X", val & 0xFF);
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AddCodeLine ("\tclc");
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AddCodeLine ("\tadc\t%s", lbuf);
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AddCodeLine ("\tsta\t%s", lbuf);
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}
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AddCodeLine ("\tclc");
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AddCodeLine ("\tadc\t%s", lbuf);
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AddCodeLine ("\tsta\t%s", lbuf);
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}
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} else {
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AddCodeLine ("\tclc");
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AddCodeLine ("\tadc\t%s", lbuf);
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AddCodeLine ("\tsta\t%s", lbuf);
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}
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AddCodeLine ("\tclc");
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AddCodeLine ("\tadc\t%s", lbuf);
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AddCodeLine ("\tsta\t%s", lbuf);
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}
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if ((flags & CF_UNSIGNED) == 0) {
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AddCodeLine ("\tbpl\t*+3");
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AddCodeLine ("\tdex");
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@ -1584,9 +1592,9 @@ void g_addeqstatic (unsigned flags, unsigned long label, unsigned offs,
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AddCodeLine ("\tsta\t%s", lbuf);
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AddCodeLine ("\ttxa");
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AddCodeLine ("\tadc\t%s+1", lbuf);
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AddCodeLine ("\tsta\t%s+1", lbuf);
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AddCodeLine ("\ttax");
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AddCodeLine ("\tlda\t%s", lbuf);
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AddCodeLine ("\tsta\t%s+1", lbuf);
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AddCodeLine ("\ttax");
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AddCodeLine ("\tlda\t%s", lbuf);
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}
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break;
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@ -1634,38 +1642,38 @@ void g_addeqlocal (unsigned flags, int offs, unsigned long val)
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case CF_CHAR:
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if (flags & CF_FORCECHAR) {
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if (offs == 0) {
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AddCodeLine ("\tldx\t#$00");
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if (flags & CF_CONST) {
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AddCodeLine ("\tclc");
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if (offs == 0) {
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AddCodeLine ("\tldx\t#$00");
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if (flags & CF_CONST) {
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AddCodeLine ("\tclc");
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AddCodeLine ("\tlda\t#$%02X", val & 0xFF);
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AddCodeLine ("\tadc\t(sp,x)");
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AddCodeLine ("\tsta\t(sp,x)");
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} else {
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AddCodeLine ("\tclc");
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AddCodeLine ("\tadc\t(sp,x)");
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AddCodeLine ("\tsta\t(sp,x)");
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}
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} else {
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ldyconst (offs);
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AddCodeLine ("\tldx\t#$00");
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if (flags & CF_CONST) {
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AddCodeLine ("\tclc");
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AddCodeLine ("\tadc\t(sp,x)");
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AddCodeLine ("\tsta\t(sp,x)");
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} else {
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AddCodeLine ("\tclc");
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AddCodeLine ("\tadc\t(sp,x)");
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AddCodeLine ("\tsta\t(sp,x)");
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}
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} else {
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ldyconst (offs);
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AddCodeLine ("\tldx\t#$00");
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if (flags & CF_CONST) {
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AddCodeLine ("\tclc");
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AddCodeLine ("\tlda\t#$%02X", val & 0xFF);
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AddCodeLine ("\tadc\t(sp),y");
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AddCodeLine ("\tsta\t(sp),y");
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} else {
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AddCodeLine ("\tadc\t(sp),y");
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AddCodeLine ("\tsta\t(sp),y");
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} else {
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AddCodeLine ("\tclc");
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AddCodeLine ("\tadc\t(sp),y");
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AddCodeLine ("\tsta\t(sp),y");
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}
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}
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if ((flags & CF_UNSIGNED) == 0) {
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AddCodeLine ("\tbpl\t*+3");
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AddCodeLine ("\tdex");
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AddCodeHint ("x:!"); /* Invalidate X */
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}
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break;
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AddCodeLine ("\tadc\t(sp),y");
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AddCodeLine ("\tsta\t(sp),y");
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}
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}
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if ((flags & CF_UNSIGNED) == 0) {
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AddCodeLine ("\tbpl\t*+3");
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AddCodeLine ("\tdex");
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AddCodeHint ("x:!"); /* Invalidate X */
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}
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break;
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}
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/* FALLTHROUGH */
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@ -1674,10 +1682,10 @@ void g_addeqlocal (unsigned flags, int offs, unsigned long val)
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g_getimmed (flags, val, 0);
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}
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if (offs == 0) {
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AddCodeLine ("\tjsr\taddeq0sp");
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AddCodeLine ("\tjsr\taddeq0sp");
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} else {
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ldyconst (offs);
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AddCodeLine ("\tjsr\taddeqysp");
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ldyconst (offs);
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AddCodeLine ("\tjsr\taddeqysp");
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}
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break;
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@ -1801,7 +1809,7 @@ void g_subeqstatic (unsigned flags, unsigned long label, unsigned offs,
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AddCodeLine ("\tbpl\t*+3");
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AddCodeLine ("\tdex");
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AddCodeHint ("x:!"); /* Invalidate X */
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}
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}
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break;
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}
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/* FALLTHROUGH */
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@ -1846,7 +1854,7 @@ void g_subeqstatic (unsigned flags, unsigned long label, unsigned offs,
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AddCodeLine ("\tsty\tptr1");
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AddCodeLine ("\tldy\t#>(%s+1)", lbuf);
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if (val == 1) {
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AddCodeLine ("\tjsr\tlsubeq1");
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AddCodeLine ("\tjsr\tlsubeq1");
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} else {
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AddCodeLine ("\tlda\t#$%02X", val & 0xFF);
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AddCodeLine ("\tjsr\tlsubeqa");
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@ -1891,7 +1899,7 @@ void g_subeqlocal (unsigned flags, int offs, unsigned long val)
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AddCodeLine ("\tsbc\t#$%02X", val & 0xFF);
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} else {
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AddCodeLine ("\tsta\ttmp1");
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AddCodeLine ("\tlda\t(sp),y");
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AddCodeLine ("\tlda\t(sp),y");
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AddCodeLine ("\tsbc\ttmp1");
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}
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AddCodeLine ("\tsta\t(sp),y");
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@ -1981,7 +1989,7 @@ void g_subeqind (unsigned flags, unsigned offs, unsigned long val)
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AddCodeLine ("\tlda\t(ptr1),y");
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AddCodeLine ("\tsbc\t#$%02X", (val >> 8) & 0xFF);
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AddCodeLine ("\tsta\t(ptr1),y");
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AddCodeLine ("\ttax");
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AddCodeLine ("\ttax");
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AddCodeLine ("\tpla");
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break;
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}
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@ -2296,7 +2304,7 @@ void g_push (unsigned flags, unsigned long val)
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break;
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case CF_LONG:
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AddCodeLine ("\tjsr\tpusheax");
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AddCodeLine ("\tjsr\tpusheax");
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break;
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default:
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@ -2521,7 +2529,7 @@ void g_mul (unsigned flags, unsigned long val)
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{
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static char* ops [12] = {
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0, "tosmula0", "tosmulax",
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0, "tosumula0", "tosumulax",
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0, "tosumula0", "tosumulax",
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0, 0, "tosmuleax",
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0, 0, "tosumuleax",
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};
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@ -2566,7 +2574,7 @@ void g_mul (unsigned flags, unsigned long val)
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AddCodeLine ("\tsta\ttmp1");
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AddCodeLine ("\tasl\ta");
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AddCodeLine ("\tasl\ta");
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AddCodeLine ("\tclc");
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AddCodeLine ("\tclc");
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AddCodeLine ("\tadc\ttmp1");
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AddCodeLine ("\tasl\ta");
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return;
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@ -2746,7 +2754,7 @@ void g_xor (unsigned flags, unsigned long val)
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return;
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} else if ((val & 0xFF) == 0) {
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AddCodeLine ("\tpha");
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AddCodeLine ("\ttxa");
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AddCodeLine ("\ttxa");
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AddCodeLine ("\teor\t#$%02X", (val >> 8) & 0xFF);
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AddCodeLine ("\ttax");
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AddCodeLine ("\tpla");
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@ -2836,7 +2844,7 @@ void g_and (unsigned flags, unsigned long val)
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if (val <= 0xFF) {
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ldxconst (0);
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AddCodeLine ("\tstx\tsreg+1");
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AddCodeLine ("\tstx\tsreg");
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AddCodeLine ("\tstx\tsreg");
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if ((val & 0xFF) != 0xFF) {
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AddCodeLine ("\tand\t#$%02X", val & 0xFF);
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}
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@ -2926,7 +2934,7 @@ void g_asr (unsigned flags, unsigned long val)
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AddCodeLine ("\tlda\tsreg");
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AddCodeLine ("\tsty\tsreg+1");
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AddCodeLine ("\tsty\tsreg");
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return;
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return;
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}
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break;
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@ -2971,7 +2979,7 @@ void g_asl (unsigned flags, unsigned long val)
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if (flags & CF_UNSIGNED) {
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AddCodeLine ("\tjsr\tshlax%ld", val);
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} else {
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AddCodeLine ("\tjsr\taslax%ld", val);
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AddCodeLine ("\tjsr\taslax%ld", val);
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}
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return;
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} else if (val == 8) {
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@ -3106,7 +3114,7 @@ void g_inc (unsigned flags, unsigned long val)
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while (val--) {
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AddCodeLine ("\tina");
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}
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} else {
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} else {
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AddCodeLine ("\tclc");
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AddCodeLine ("\tadc\t#$%02X", val & 0xFF);
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}
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@ -3151,7 +3159,7 @@ void g_inc (unsigned flags, unsigned long val)
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} else {
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AddCodeLine ("\tclc");
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if ((val & 0xFF) != 0) {
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AddCodeLine ("\tadc\t#$%02X", (unsigned char) val);
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AddCodeLine ("\tadc\t#$%02X", (unsigned char) val);
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/* Tell the optimizer that the X register may be invalid */
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AddCodeHint ("x:!");
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}
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@ -3196,7 +3204,7 @@ void g_dec (unsigned flags, unsigned long val)
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}
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} else {
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AddCodeLine ("\tsec");
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AddCodeLine ("\tsbc\t#$%02X", val & 0xFF);
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AddCodeLine ("\tsbc\t#$%02X", val & 0xFF);
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}
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break;
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}
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@ -3376,7 +3384,7 @@ void g_lt (unsigned flags, unsigned long val)
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}
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return;
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}
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/* FALLTHROUGH */
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/* FALLTHROUGH */
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case CF_INT:
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if ((flags & CF_UNSIGNED) == 0 && val == 0) {
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@ -3511,7 +3519,7 @@ void g_gt (unsigned flags, unsigned long val)
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AddCodeLine ("\tjsr\tboolne");
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}
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} else {
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AddCodeLine ("\tjsr\tboolgt");
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AddCodeLine ("\tjsr\tboolgt");
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}
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return;
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}
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@ -3601,7 +3609,7 @@ void g_ge (unsigned flags, unsigned long val)
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AddCodeLine ("\tjsr\tbooluge");
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return;
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}
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break;
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break;
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case CF_LONG:
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break;
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@ -3646,7 +3654,7 @@ void g_defdata (unsigned flags, unsigned long val, unsigned offs)
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switch (flags & CF_TYPE) {
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case CF_CHAR:
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AddCodeLine ("\t.byte\t$%02lX", val & 0xFF);
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AddCodeLine ("\t.byte\t$%02lX", val & 0xFF);
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break;
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case CF_INT:
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@ -3715,10 +3723,10 @@ void g_zerobytes (unsigned n)
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AddCodeLine ("\t.res\t%u,$00", n);
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}
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/*****************************************************************************/
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/* Inlined known functions */
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/* Inlined known functions */
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/*****************************************************************************/
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@ -3741,8 +3749,8 @@ void g_strlen (unsigned flags, unsigned long val, unsigned offs)
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AddCodeLine ("\tiny");
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AddCodeLine ("\tlda\t%s,y", lbuf);
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AddCodeLine ("\tbne\tL%04X", label);
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AddCodeLine ("\ttax");
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AddCodeLine ("\ttya");
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AddCodeLine ("\tldx\t#$00");
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} else {
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@ -3759,8 +3767,8 @@ void g_strlen (unsigned flags, unsigned long val, unsigned offs)
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AddCodeLine ("\tiny");
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AddCodeLine ("\tlda\t(ptr1),y");
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AddCodeLine ("\tbne\tL%04X", label);
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AddCodeLine ("\ttax");
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AddCodeLine ("\ttya");
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AddCodeLine ("\tldx\t#$00");
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}
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}
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}
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@ -1103,7 +1103,7 @@ static unsigned RVUInt2 (Line* L,
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do {
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/* Handle jumps to local labels (continue there) */
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if (LineMatch (L, "\tjmp\tL")) {
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if (LineMatch (L, "\tjmp\tL") || LineMatch (L, "\tbra\tL")) {
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/* Get the target of the jump */
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L = GetTargetLine (L->Line+5);
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}
|
||||
@ -1113,33 +1113,33 @@ static unsigned RVUInt2 (Line* L,
|
||||
|
||||
/* Bail out if we're done */
|
||||
if (L == 0 || IsLabel (L)) {
|
||||
/* Something is wrong */
|
||||
return REG_ALL;
|
||||
/* Something is wrong */
|
||||
return REG_ALL;
|
||||
}
|
||||
|
||||
/* Check if we had this line already. If so, bail out, if not,
|
||||
* add it to the list of known lines.
|
||||
*/
|
||||
if (LCHasLine (LC, L) || !LCAddLine (LC, L)) {
|
||||
goto ExitPoint;
|
||||
goto ExitPoint;
|
||||
}
|
||||
|
||||
} while (LineMatch (L, "\tjmp\tL"));
|
||||
} while (LineMatch (L, "\tjmp\tL") || LineMatch (L, "\tbra\tL"));
|
||||
|
||||
/* Special handling for branches */
|
||||
if (LineMatchX (L, ShortBranches) >= 0 ||
|
||||
LineMatchX (L, LongBranches) >= 0) {
|
||||
const char* Target = L->Line+5;
|
||||
if (Target[0] == 'L') {
|
||||
/* Jump to local label. Check the register usage starting at
|
||||
* the branch target and at the code following the branch.
|
||||
* All registers that are unused in both execution flows are
|
||||
* returned as unused.
|
||||
*/
|
||||
unsigned U1, U2;
|
||||
/* Jump to local label. Check the register usage starting at
|
||||
* the branch target and at the code following the branch.
|
||||
* All registers that are unused in both execution flows are
|
||||
* returned as unused.
|
||||
*/
|
||||
unsigned U1, U2;
|
||||
U2 = RVUInt1 (GetTargetLine (Target), LC, Used, Unused);
|
||||
U1 = RVUInt1 (L, LC, Used, Unused);
|
||||
return U1 | U2; /* Used in any of the branches */
|
||||
U1 = RVUInt1 (L, LC, Used, Unused);
|
||||
return U1 | U2; /* Used in any of the branches */
|
||||
}
|
||||
}
|
||||
|
||||
@ -1218,7 +1218,7 @@ static unsigned RegValUsed (Line* Start)
|
||||
* If the end of the lookahead is reached, all registers that are uncertain
|
||||
* are marked as used.
|
||||
* The result of the search is returned.
|
||||
*/
|
||||
*/
|
||||
{
|
||||
unsigned R;
|
||||
|
||||
@ -1758,7 +1758,7 @@ static void OptRegLoads (void)
|
||||
|
||||
/* Search for a load of Y and check if the value is used later */
|
||||
else if (LineMatch (L, "\tldy\t") &&
|
||||
!RegYUsed (L) &&
|
||||
!RegYUsed (L) &&
|
||||
!IsCondJump (NextInstruction (L))) {
|
||||
|
||||
/* Remember to delete this line */
|
||||
@ -3867,6 +3867,10 @@ static Line* OptOneBlock (Line* L)
|
||||
} else if (LineFullMatch (L, "\tjsr\tpushax")) {
|
||||
/* We know about this function */
|
||||
Y = 1;
|
||||
} else if (LineFullMatch (L, "\tjsr\tpushaysp")) {
|
||||
/* We know about this function */
|
||||
A = -1;
|
||||
Y = 0;
|
||||
} else if (LineFullMatch (L, "\tjsr\tpushc0")) {
|
||||
/* We know about this function */
|
||||
A = 0;
|
||||
@ -4196,6 +4200,26 @@ static void OptJumps (void)
|
||||
}
|
||||
L = NextCodeLine (L);
|
||||
}
|
||||
|
||||
/* Special treatment for jumps on the 65C02 */
|
||||
if (CPU == CPU_65C02) {
|
||||
|
||||
Line* L = FirstCode;
|
||||
while (L) {
|
||||
if (LineMatch (L, "\tjmp\tL")) {
|
||||
Line* Target = GetTargetLine (L->Line+5);
|
||||
unsigned Distance = GetJumpDistance (L, Target);
|
||||
if (Distance < 123) { /* Safety */
|
||||
L->Line [1] = 'b'; /* Make a short branch */
|
||||
L->Line [2] = 'r';
|
||||
L->Line [3] = 'a';
|
||||
L->Size = 2; /* Set new size */
|
||||
}
|
||||
}
|
||||
L = NextCodeLine (L);
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user