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Don't generate short code for the tosxxx functions when X is zero or similar.
Let the optimizer do it. This reduces the number of possible patterns that must be detected by the optimizer. Add tosicmp0 as a shortcut function. git-svn-id: svn://svn.cc65.org/cc65/trunk@4006 b7a2c559-68d2-44c3-8de9-860c34a00d81
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uz
parent
6a26b6e3b4
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0b7b9354dc
@ -6,8 +6,8 @@
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/* */
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/* */
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/* */
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/* (C) 1998-2004 Ullrich von Bassewitz */
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/* Römerstraße 52 */
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/* (C) 1998-2009 Ullrich von Bassewitz */
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/* Roemerstrasse 52 */
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/* D-70794 Filderstadt */
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/* EMail: uz@cc65.org */
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/* */
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@ -2267,58 +2267,33 @@ void g_cmp (unsigned flags, unsigned long val)
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static void oper (unsigned flags, unsigned long val, char** subs)
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/* Encode a binary operation. subs is a pointer to four groups of three
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* strings:
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* 0-2 --> Operate on ints
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* 3-5 --> Operate on unsigneds
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* 6-8 --> Operate on longs
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* 9-11 --> Operate on unsigned longs
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*
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* The first subroutine names in each string group is used to encode an
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* operation with a zero constant, the second to encode an operation with
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* a 8 bit constant, and the third is used in all other cases.
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static void oper (unsigned Flags, unsigned long Val, const char** Subs)
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/* Encode a binary operation. subs is a pointer to four strings:
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* 0 --> Operate on ints
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* 1 --> Operate on unsigneds
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* 2 --> Operate on longs
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* 3 --> Operate on unsigned longs
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*/
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{
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unsigned offs;
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/* Determine the offset into the array */
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offs = (flags & CF_UNSIGNED)? 3 : 0;
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switch (flags & CF_TYPE) {
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case CF_CHAR:
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case CF_INT:
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break;
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case CF_LONG:
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offs += 6;
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break;
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default:
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typeerror (flags);
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if (Flags & CF_UNSIGNED) {
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++Subs;
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}
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if ((Flags & CF_TYPE) == CF_LONG) {
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Subs += 2;
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}
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/* Encode the operation */
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if (flags & CF_CONST) {
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/* Constant value given */
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if (val == 0 && subs [offs+0]) {
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/* Special case: constant with value zero */
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AddCodeLine ("jsr %s", subs [offs+0]);
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} else if (val < 0x100 && subs [offs+1]) {
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/* Special case: constant with high byte zero */
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ldaconst (val); /* Load low byte */
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AddCodeLine ("jsr %s", subs [offs+1]);
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} else {
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/* Others: arbitrary constant value */
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g_getimmed (flags, val, 0); /* Load value */
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AddCodeLine ("jsr %s", subs [offs+2]);
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}
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} else {
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/* Value not constant (is already in (e)ax) */
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AddCodeLine ("jsr %s", subs [offs+2]);
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/* Load the value if it is not already in the primary */
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if (Flags & CF_CONST) {
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/* Load value */
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g_getimmed (Flags, Val, 0);
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}
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/* Output the operation */
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AddCodeLine ("jsr %s", *Subs);
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/* The operation will pop it's argument */
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pop (flags);
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pop (Flags);
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}
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@ -2550,11 +2525,8 @@ void g_stackcheck (void)
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void g_add (unsigned flags, unsigned long val)
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/* Primary = TOS + Primary */
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{
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static char* ops [12] = {
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0, "tosadda0", "tosaddax",
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0, "tosadda0", "tosaddax",
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0, 0, "tosaddeax",
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0, 0, "tosaddeax",
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static const char* ops[12] = {
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"tosaddax", "tosaddax", "tosaddeax", "tosaddeax"
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};
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if (flags & CF_CONST) {
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@ -2569,11 +2541,8 @@ void g_add (unsigned flags, unsigned long val)
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void g_sub (unsigned flags, unsigned long val)
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/* Primary = TOS - Primary */
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{
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static char* ops [12] = {
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0, "tossuba0", "tossubax",
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0, "tossuba0", "tossubax",
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0, 0, "tossubeax",
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0, 0, "tossubeax",
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static const char* ops[12] = {
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"tossubax", "tossubax", "tossubeax", "tossubeax",
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};
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if (flags & CF_CONST) {
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@ -2588,11 +2557,8 @@ void g_sub (unsigned flags, unsigned long val)
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void g_rsub (unsigned flags, unsigned long val)
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/* Primary = Primary - TOS */
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{
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static char* ops [12] = {
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0, "tosrsuba0", "tosrsubax",
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0, "tosrsuba0", "tosrsubax",
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0, 0, "tosrsubeax",
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0, 0, "tosrsubeax",
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static const char* ops[12] = {
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"tosrsubax", "tosrsubax", "tosrsubeax", "tosrsubeax",
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};
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oper (flags, val, ops);
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}
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@ -2602,11 +2568,8 @@ void g_rsub (unsigned flags, unsigned long val)
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void g_mul (unsigned flags, unsigned long val)
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/* Primary = TOS * Primary */
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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, 0, "tosmuleax",
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0, 0, "tosumuleax",
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static const char* ops[12] = {
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"tosmulax", "tosumulax", "tosmuleax", "tosumuleax",
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};
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int p2;
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@ -2712,11 +2675,8 @@ void g_mul (unsigned flags, unsigned long val)
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void g_div (unsigned flags, unsigned long val)
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/* Primary = TOS / Primary */
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{
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static char* ops [12] = {
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0, "tosdiva0", "tosdivax",
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0, "tosudiva0", "tosudivax",
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0, 0, "tosdiveax",
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0, 0, "tosudiveax",
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static const char* ops[12] = {
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"tosdivax", "tosudivax", "tosdiveax", "tosudiveax",
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};
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/* Do strength reduction if the value is constant and a power of two */
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@ -2740,11 +2700,8 @@ void g_div (unsigned flags, unsigned long val)
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void g_mod (unsigned flags, unsigned long val)
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/* Primary = TOS % Primary */
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{
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static char* ops [12] = {
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0, "tosmoda0", "tosmodax",
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0, "tosumoda0", "tosumodax",
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0, 0, "tosmodeax",
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0, 0, "tosumodeax",
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static const char* ops[12] = {
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"tosmodax", "tosumodax", "tosmodeax", "tosumodeax",
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};
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int p2;
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@ -2768,11 +2725,8 @@ void g_mod (unsigned flags, unsigned long val)
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void g_or (unsigned flags, unsigned long val)
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/* Primary = TOS | Primary */
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{
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static char* ops [12] = {
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0, "tosora0", "tosorax",
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0, "tosora0", "tosorax",
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0, 0, "tosoreax",
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0, 0, "tosoreax",
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static const char* ops[12] = {
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"tosorax", "tosorax", "tosoreax", "tosoreax",
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};
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/* If the right hand side is const, the lhs is not on stack but still
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@ -2841,11 +2795,8 @@ void g_or (unsigned flags, unsigned long val)
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void g_xor (unsigned flags, unsigned long val)
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/* Primary = TOS ^ Primary */
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{
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static char* ops [12] = {
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0, "tosxora0", "tosxorax",
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0, "tosxora0", "tosxorax",
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0, 0, "tosxoreax",
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0, 0, "tosxoreax",
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static const char* ops[12] = {
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"tosxorax", "tosxorax", "tosxoreax", "tosxoreax",
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};
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@ -2912,11 +2863,8 @@ void g_xor (unsigned flags, unsigned long val)
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void g_and (unsigned Flags, unsigned long Val)
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/* Primary = TOS & Primary */
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{
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static char* ops [12] = {
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0, "tosanda0", "tosandax",
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0, "tosanda0", "tosandax",
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0, 0, "tosandeax",
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0, 0, "tosandeax",
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static const char* ops[12] = {
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"tosandax", "tosandax", "tosandeax", "tosandeax",
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};
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/* If the right hand side is const, the lhs is not on stack but still
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@ -3001,11 +2949,8 @@ void g_and (unsigned Flags, unsigned long Val)
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void g_asr (unsigned flags, unsigned long val)
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/* Primary = TOS >> Primary */
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{
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static char* ops [12] = {
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0, 0, "tosasrax",
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0, 0, "tosshrax",
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0, 0, "tosasreax",
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0, 0, "tosshreax",
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static const char* ops[12] = {
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"tosasrax", "tosshrax", "tosasreax", "tosshreax",
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};
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/* If the right hand side is const, the lhs is not on stack but still
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@ -3091,11 +3036,8 @@ void g_asr (unsigned flags, unsigned long val)
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void g_asl (unsigned flags, unsigned long val)
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/* Primary = TOS << Primary */
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{
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static char* ops [12] = {
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0, 0, "tosaslax",
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0, 0, "tosshlax",
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0, 0, "tosasleax",
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0, 0, "tosshleax",
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static const char* ops[12] = {
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"tosaslax", "tosshlax", "tosasleax", "tosshleax",
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};
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@ -3450,11 +3392,8 @@ void g_dec (unsigned flags, unsigned long val)
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void g_eq (unsigned flags, unsigned long val)
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/* Test for equal */
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{
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static char* ops [12] = {
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"toseq00", "toseqa0", "toseqax",
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"toseq00", "toseqa0", "toseqax",
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0, 0, "toseqeax",
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0, 0, "toseqeax",
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static const char* ops[12] = {
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"toseqax", "toseqax", "toseqeax", "toseqeax",
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};
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unsigned L;
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@ -3507,11 +3446,8 @@ void g_eq (unsigned flags, unsigned long val)
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void g_ne (unsigned flags, unsigned long val)
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/* Test for not equal */
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{
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static char* ops [12] = {
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"tosne00", "tosnea0", "tosneax",
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"tosne00", "tosnea0", "tosneax",
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0, 0, "tosneeax",
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0, 0, "tosneeax",
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static const char* ops[12] = {
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"tosneax", "tosneax", "tosneeax", "tosneeax",
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};
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unsigned L;
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@ -3564,11 +3500,8 @@ void g_ne (unsigned flags, unsigned long val)
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void g_lt (unsigned flags, unsigned long val)
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/* Test for less than */
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{
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static char* ops [12] = {
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"toslt00", "toslta0", "tosltax",
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"tosult00", "tosulta0", "tosultax",
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0, 0, "toslteax",
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0, 0, "tosulteax",
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static const char* ops[12] = {
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"tosltax", "tosultax", "toslteax", "tosulteax",
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};
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/* If the right hand side is const, the lhs is not on stack but still
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@ -3675,11 +3608,8 @@ void g_lt (unsigned flags, unsigned long val)
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void g_le (unsigned flags, unsigned long val)
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/* Test for less than or equal to */
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{
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static char* ops [12] = {
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"tosle00", "toslea0", "tosleax",
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"tosule00", "tosulea0", "tosuleax",
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0, 0, "tosleeax",
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0, 0, "tosuleeax",
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static const char* ops[12] = {
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"tosleax", "tosuleax", "tosleeax", "tosuleeax",
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};
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@ -3793,11 +3723,8 @@ void g_le (unsigned flags, unsigned long val)
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void g_gt (unsigned flags, unsigned long val)
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/* Test for greater than */
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{
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static char* ops [12] = {
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"tosgt00", "tosgta0", "tosgtax",
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"tosugt00", "tosugta0", "tosugtax",
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0, 0, "tosgteax",
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0, 0, "tosugteax",
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static const char* ops[12] = {
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"tosgtax", "tosugtax", "tosgteax", "tosugteax",
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};
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@ -3927,11 +3854,8 @@ void g_gt (unsigned flags, unsigned long val)
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void g_ge (unsigned flags, unsigned long val)
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/* Test for greater than or equal to */
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{
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static char* ops [12] = {
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"tosge00", "tosgea0", "tosgeax",
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"tosuge00", "tosugea0", "tosugeax",
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0, 0, "tosgeeax",
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0, 0, "tosugeeax",
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static const char* ops[12] = {
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"tosgeax", "tosugeax", "tosgeeax", "tosugeeax",
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};
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@ -6,8 +6,8 @@
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/* */
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/* */
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/* */
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/* (C) 2001-2006, Ullrich von Bassewitz */
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/* Römerstraße 52 */
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/* (C) 2001-2009, Ullrich von Bassewitz */
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/* Roemerstrasse 52 */
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/* D-70794 Filderstadt */
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/* EMail: uz@cc65.org */
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/* */
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@ -235,6 +235,7 @@ static const FuncInfo FuncInfoTable[] = {
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{ "tosgtax", REG_AX, REG_AXY | REG_SREG },
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{ "tosgteax", REG_EAX, REG_AXY | REG_PTR1 },
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{ "tosicmp", REG_AX, REG_AXY | REG_SREG },
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{ "tosicmp0", REG_A, REG_AXY | REG_SREG },
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{ "toslcmp", REG_EAX, REG_A | REG_Y | REG_PTR1 },
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{ "tosle00", REG_NONE, REG_AXY | REG_SREG },
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{ "toslea0", REG_A, REG_AXY | REG_SREG },
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@ -6,8 +6,8 @@
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/* */
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/* */
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/* */
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/* (C) 2002-2005, Ullrich von Bassewitz */
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/* Römerstraße 52 */
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/* (C) 2002-2009, Ullrich von Bassewitz */
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/* Roemerstrasse 52 */
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/* D-70794 Filderstadt */
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/* EMail: uz@cc65.org */
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/* */
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@ -106,6 +106,7 @@ static const CallDesc CallTable [] = {
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{ "tosgeax", UNKNOWN_REGVAL, 0, UNKNOWN_REGVAL, F_NONE, "tosgea0" },
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{ "tosgtax", 0, 0, UNKNOWN_REGVAL, F_NONE, "tosgt00" },
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{ "tosgtax", UNKNOWN_REGVAL, 0, UNKNOWN_REGVAL, F_NONE, "tosgta0" },
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{ "tosicmp", UNKNOWN_REGVAL, 0, UNKNOWN_REGVAL, F_NONE, "tosicmp0" },
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{ "tosleax", 0, 0, UNKNOWN_REGVAL, F_NONE, "tosle00" },
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{ "tosleax", UNKNOWN_REGVAL, 0, UNKNOWN_REGVAL, F_NONE, "toslea0" },
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{ "tosltax", 0, 0, UNKNOWN_REGVAL, F_NONE, "toslt00" },
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