mirror of
https://github.com/cc65/cc65.git
synced 2024-12-26 08:32:00 +00:00
Fixed a bug in signed int compares
git-svn-id: svn://svn.cc65.org/cc65/trunk@2483 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz
parent
9a2b4dc849
commit
923ae328a5
@ -676,26 +676,26 @@ void g_getimmed (unsigned Flags, unsigned long Val, long Offs)
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AddCodeLine ("stx sreg+1");
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Done |= 0x08;
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}
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if ((Done & 0x04) == 0 && B1 != B3) {
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AddCodeLine ("lda #$%02X", B3);
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AddCodeLine ("sta sreg");
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Done |= 0x04;
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}
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if ((Done & 0x08) == 0 && B1 != B4) {
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AddCodeLine ("lda #$%02X", B4);
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AddCodeLine ("sta sreg+1");
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Done |= 0x08;
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}
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AddCodeLine ("lda #$%02X", B1);
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Done |= 0x01;
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if ((Done & 0x04) == 0) {
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CHECK (B1 == B3);
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AddCodeLine ("sta sreg");
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}
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if ((Done & 0x08) == 0) {
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CHECK (B1 == B4);
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AddCodeLine ("sta sreg+1");
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}
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if ((Done & 0x04) == 0 && B1 != B3) {
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AddCodeLine ("lda #$%02X", B3);
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AddCodeLine ("sta sreg");
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Done |= 0x04;
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}
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if ((Done & 0x08) == 0 && B1 != B4) {
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AddCodeLine ("lda #$%02X", B4);
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AddCodeLine ("sta sreg+1");
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Done |= 0x08;
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}
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AddCodeLine ("lda #$%02X", B1);
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Done |= 0x01;
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if ((Done & 0x04) == 0) {
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CHECK (B1 == B3);
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AddCodeLine ("sta sreg");
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}
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if ((Done & 0x08) == 0) {
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CHECK (B1 == B4);
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AddCodeLine ("sta sreg+1");
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}
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break;
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default:
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@ -706,12 +706,12 @@ void g_getimmed (unsigned Flags, unsigned long Val, long Offs)
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} else {
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/* Some sort of label */
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const char* Label = GetLabelName (Flags, Val, Offs);
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/* Some sort of label */
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const char* Label = GetLabelName (Flags, Val, Offs);
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/* Load the address into the primary */
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AddCodeLine ("lda #<(%s)", Label);
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AddCodeLine ("ldx #>(%s)", Label);
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/* Load the address into the primary */
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AddCodeLine ("lda #<(%s)", Label);
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AddCodeLine ("ldx #>(%s)", Label);
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}
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}
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@ -3492,84 +3492,58 @@ void g_lt (unsigned flags, unsigned long val)
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*/
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if (flags & CF_CONST) {
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/* Give a warning in some special cases */
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if ((flags & CF_UNSIGNED) && val == 0) {
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Warning ("Condition is never true");
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AddCodeLine ("jsr return0");
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return;
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}
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/* Because the handling of the overflow flag is too complex for
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* inlining, we can handle only unsigned compares here.
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*/
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if (flags & CF_UNSIGNED) {
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/* Look at the type */
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switch (flags & CF_TYPE) {
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/* Give a warning in some special cases */
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if (val == 0) {
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Warning ("Condition is never true");
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AddCodeLine ("jsr return0");
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return;
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}
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case CF_CHAR:
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if (flags & CF_FORCECHAR) {
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AddCodeLine ("cmp #$%02X", (unsigned char)val);
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if (flags & CF_UNSIGNED) {
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AddCodeLine ("jsr boolult");
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} else {
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AddCodeLine ("jsr boollt");
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}
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return;
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}
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/* FALLTHROUGH */
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/* Look at the type */
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switch (flags & CF_TYPE) {
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case CF_INT:
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if (flags & CF_UNSIGNED) {
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/* Unsigned compare */
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/* If the low byte is zero, we must only test the high byte */
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AddCodeLine ("cpx #$%02X", (unsigned char)(val >> 8));
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if ((val & 0xFF) != 0) {
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unsigned L = GetLocalLabel();
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AddCodeLine ("bne %s", LocalLabelName (L));
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AddCodeLine ("cmp #$%02X", (unsigned char)val);
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g_defcodelabel (L);
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}
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AddCodeLine ("jsr boolult");
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} else {
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/* Signed compare */
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if ((val & 0xFF) == 0) {
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/* Low byte is zero, just look at the high byte */
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AddCodeLine ("cpx #$%02X", (unsigned char)(val >> 8));
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} else {
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/* Subtract the two values */
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AddCodeLine ("cmp #$%02X", (unsigned char)val);
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AddCodeLine ("txa");
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AddCodeLine ("sbc #$%02X", (unsigned char)(val >> 8));
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}
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AddCodeLine ("jsr boollt");
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}
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return;
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case CF_CHAR:
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if (flags & CF_FORCECHAR) {
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AddCodeLine ("cmp #$%02X", (unsigned char)val);
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AddCodeLine ("jsr boolult");
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return;
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}
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/* FALLTHROUGH */
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case CF_LONG:
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if ((flags & CF_UNSIGNED) == 0 && val == 0) {
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/* If we have a signed compare against zero, we only need to
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* test the high byte.
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*/
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AddCodeLine ("lda sreg+1");
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} else {
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/* Do a subtraction */
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AddCodeLine ("cmp #$%02X", (unsigned char)val);
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AddCodeLine ("txa");
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AddCodeLine ("sbc #$%02X", (unsigned char)(val >> 8));
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AddCodeLine ("lda sreg");
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AddCodeLine ("sbc #$%02X", (unsigned char)(val >> 16));
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AddCodeLine ("lda sreg+1");
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AddCodeLine ("sbc #$%02X", (unsigned char)(val >> 24));
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}
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/* Emit the proper makebool routine */
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if (flags & CF_UNSIGNED) {
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/* Unsigned compare */
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AddCodeLine ("jsr boolult");
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} else {
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/* Signed compare */
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AddCodeLine ("jsr boollt");
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}
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return;
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case CF_INT:
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/* If the low byte is zero, we must only test the high byte */
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AddCodeLine ("cpx #$%02X", (unsigned char)(val >> 8));
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if ((val & 0xFF) != 0) {
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unsigned L = GetLocalLabel();
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AddCodeLine ("bne %s", LocalLabelName (L));
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AddCodeLine ("cmp #$%02X", (unsigned char)val);
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g_defcodelabel (L);
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}
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AddCodeLine ("jsr boolult");
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return;
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default:
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typeerror (flags);
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}
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case CF_LONG:
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/* Do a subtraction */
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AddCodeLine ("cmp #$%02X", (unsigned char)val);
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AddCodeLine ("txa");
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AddCodeLine ("sbc #$%02X", (unsigned char)(val >> 8));
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AddCodeLine ("lda sreg");
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AddCodeLine ("sbc #$%02X", (unsigned char)(val >> 16));
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AddCodeLine ("lda sreg+1");
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AddCodeLine ("sbc #$%02X", (unsigned char)(val >> 24));
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AddCodeLine ("jsr boolult");
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return;
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default:
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typeerror (flags);
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}
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}
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/* If we go here, we didn't emit code. Push the lhs on stack and fall
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* into the normal, non-optimized stuff.
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@ -3591,7 +3565,7 @@ void g_le (unsigned flags, unsigned long val)
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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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0, 0, "tosuleeax",
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};
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@ -3606,92 +3580,92 @@ void g_le (unsigned flags, unsigned long val)
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case CF_CHAR:
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if (flags & CF_FORCECHAR) {
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if (flags & CF_UNSIGNED) {
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/* Unsigned compare */
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/* Unsigned compare */
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if (val < 0xFF) {
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/* Use < instead of <= because the former gives
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* better code on the 6502 than the latter.
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*/
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g_lt (flags, val+1);
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/* Use < instead of <= because the former gives
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* better code on the 6502 than the latter.
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*/
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g_lt (flags, val+1);
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} else {
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/* Always true */
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Warning ("Condition is always true");
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AddCodeLine ("jsr return1");
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/* Always true */
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Warning ("Condition is always true");
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AddCodeLine ("jsr return1");
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}
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} else {
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/* Signed compare */
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/* Signed compare */
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if ((long) val < 0x7F) {
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/* Use < instead of <= because the former gives
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* better code on the 6502 than the latter.
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*/
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g_lt (flags, val+1);
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/* Use < instead of <= because the former gives
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* better code on the 6502 than the latter.
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*/
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g_lt (flags, val+1);
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} else {
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/* Always true */
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Warning ("Condition is always true");
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AddCodeLine ("jsr return1");
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/* Always true */
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Warning ("Condition is always true");
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AddCodeLine ("jsr return1");
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}
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}
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return;
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}
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/* FALLTHROUGH */
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}
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return;
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}
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/* FALLTHROUGH */
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case CF_INT:
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if (flags & CF_UNSIGNED) {
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/* Unsigned compare */
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if (val < 0xFFFF) {
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/* Use < instead of <= because the former gives
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* better code on the 6502 than the latter.
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*/
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g_lt (flags, val+1);
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} else {
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/* Always true */
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Warning ("Condition is always true");
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AddCodeLine ("jsr return1");
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}
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case CF_INT:
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if (flags & CF_UNSIGNED) {
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/* Unsigned compare */
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if (val < 0xFFFF) {
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/* Use < instead of <= because the former gives
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* better code on the 6502 than the latter.
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*/
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g_lt (flags, val+1);
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} else {
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/* Always true */
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Warning ("Condition is always true");
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AddCodeLine ("jsr return1");
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}
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} else {
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/* Signed compare */
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if ((long) val < 0x7FFF) {
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g_lt (flags, val+1);
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} else {
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/* Always true */
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Warning ("Condition is always true");
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AddCodeLine ("jsr return1");
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}
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}
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return;
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/* Always true */
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Warning ("Condition is always true");
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AddCodeLine ("jsr return1");
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}
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}
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return;
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case CF_LONG:
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if (flags & CF_UNSIGNED) {
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/* Unsigned compare */
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if (val < 0xFFFFFFFF) {
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/* Use < instead of <= because the former gives
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* better code on the 6502 than the latter.
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*/
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g_lt (flags, val+1);
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} else {
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/* Always true */
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Warning ("Condition is always true");
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AddCodeLine ("jsr return1");
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}
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case CF_LONG:
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if (flags & CF_UNSIGNED) {
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/* Unsigned compare */
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if (val < 0xFFFFFFFF) {
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/* Use < instead of <= because the former gives
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* better code on the 6502 than the latter.
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*/
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g_lt (flags, val+1);
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} else {
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/* Always true */
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Warning ("Condition is always true");
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AddCodeLine ("jsr return1");
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}
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} else {
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/* Signed compare */
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if ((long) val < 0x7FFFFFFF) {
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g_lt (flags, val+1);
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} else {
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/* Always true */
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Warning ("Condition is always true");
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AddCodeLine ("jsr return1");
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}
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}
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return;
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/* Always true */
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Warning ("Condition is always true");
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AddCodeLine ("jsr return1");
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}
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}
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return;
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default:
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typeerror (flags);
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}
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default:
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typeerror (flags);
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}
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/* If we go here, we didn't emit code. Push the lhs on stack and fall
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* into the normal, non-optimized stuff.
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*/
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g_push (flags & ~CF_CONST, 0);
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/* If we go here, we didn't emit code. Push the lhs on stack and fall
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* into the normal, non-optimized stuff.
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*/
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g_push (flags & ~CF_CONST, 0);
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}
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@ -3707,8 +3681,8 @@ void g_gt (unsigned flags, unsigned long val)
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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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0, 0, "tosgteax",
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0, 0, "tosugteax",
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};
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@ -3724,32 +3698,32 @@ void g_gt (unsigned flags, unsigned long val)
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if (flags & CF_FORCECHAR) {
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if (flags & CF_UNSIGNED) {
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if (val == 0) {
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/* If we have a compare > 0, we will replace it by
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* != 0 here, since both are identical but the
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* latter is easier to optimize.
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*/
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g_ne (flags, val);
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/* If we have a compare > 0, we will replace it by
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* != 0 here, since both are identical but the
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* latter is easier to optimize.
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*/
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g_ne (flags, val);
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} else if (val < 0xFF) {
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/* Use >= instead of > because the former gives
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* better code on the 6502 than the latter.
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*/
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g_ge (flags, val+1);
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/* Use >= instead of > because the former gives
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* better code on the 6502 than the latter.
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*/
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g_ge (flags, val+1);
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} else {
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/* Never true */
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Warning ("Condition is never true");
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AddCodeLine ("jsr return0");
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}
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/* Never true */
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Warning ("Condition is never true");
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AddCodeLine ("jsr return0");
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}
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} else {
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if ((long) val < 0x7F) {
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/* Use >= instead of > because the former gives
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* better code on the 6502 than the latter.
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*/
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g_ge (flags, val+1);
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} else {
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/* Never true */
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Warning ("Condition is never true");
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AddCodeLine ("jsr return0");
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}
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if ((long) val < 0x7F) {
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/* Use >= instead of > because the former gives
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* better code on the 6502 than the latter.
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*/
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g_ge (flags, val+1);
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} else {
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/* Never true */
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Warning ("Condition is never true");
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AddCodeLine ("jsr return0");
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}
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}
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return;
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}
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@ -3757,74 +3731,74 @@ void g_gt (unsigned flags, unsigned long val)
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case CF_INT:
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if (flags & CF_UNSIGNED) {
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/* Unsigned compare */
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if (val == 0) {
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/* If we have a compare > 0, we will replace it by
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* != 0 here, since both are identical but the latter
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* is easier to optimize.
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*/
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g_ne (flags, val);
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} else if (val < 0xFFFF) {
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/* Use >= instead of > because the former gives better
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* code on the 6502 than the latter.
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*/
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g_ge (flags, val+1);
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} else {
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/* Never true */
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Warning ("Condition is never true");
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AddCodeLine ("jsr return0");
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}
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/* Unsigned compare */
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if (val == 0) {
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/* If we have a compare > 0, we will replace it by
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* != 0 here, since both are identical but the latter
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* is easier to optimize.
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*/
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g_ne (flags, val);
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} else if (val < 0xFFFF) {
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/* Use >= instead of > because the former gives better
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* code on the 6502 than the latter.
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*/
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g_ge (flags, val+1);
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} else {
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/* Never true */
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Warning ("Condition is never true");
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AddCodeLine ("jsr return0");
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}
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} else {
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/* Signed compare */
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if ((long) val < 0x7FFF) {
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g_ge (flags, val+1);
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} else {
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/* Never true */
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Warning ("Condition is never true");
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AddCodeLine ("jsr return0");
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}
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}
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return;
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/* Signed compare */
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if ((long) val < 0x7FFF) {
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g_ge (flags, val+1);
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} else {
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/* Never true */
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Warning ("Condition is never true");
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AddCodeLine ("jsr return0");
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}
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}
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return;
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case CF_LONG:
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case CF_LONG:
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if (flags & CF_UNSIGNED) {
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/* Unsigned compare */
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if (val == 0) {
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/* If we have a compare > 0, we will replace it by
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* != 0 here, since both are identical but the latter
|
||||
* is easier to optimize.
|
||||
*/
|
||||
g_ne (flags, val);
|
||||
} else if (val < 0xFFFFFFFF) {
|
||||
/* Use >= instead of > because the former gives better
|
||||
* code on the 6502 than the latter.
|
||||
*/
|
||||
g_ge (flags, val+1);
|
||||
} else {
|
||||
/* Never true */
|
||||
Warning ("Condition is never true");
|
||||
AddCodeLine ("jsr return0");
|
||||
}
|
||||
/* Unsigned compare */
|
||||
if (val == 0) {
|
||||
/* If we have a compare > 0, we will replace it by
|
||||
* != 0 here, since both are identical but the latter
|
||||
* is easier to optimize.
|
||||
*/
|
||||
g_ne (flags, val);
|
||||
} else if (val < 0xFFFFFFFF) {
|
||||
/* Use >= instead of > because the former gives better
|
||||
* code on the 6502 than the latter.
|
||||
*/
|
||||
g_ge (flags, val+1);
|
||||
} else {
|
||||
/* Never true */
|
||||
Warning ("Condition is never true");
|
||||
AddCodeLine ("jsr return0");
|
||||
}
|
||||
} else {
|
||||
/* Signed compare */
|
||||
if ((long) val < 0x7FFFFFFF) {
|
||||
g_ge (flags, val+1);
|
||||
} else {
|
||||
/* Never true */
|
||||
Warning ("Condition is never true");
|
||||
AddCodeLine ("jsr return0");
|
||||
}
|
||||
}
|
||||
return;
|
||||
/* Signed compare */
|
||||
if ((long) val < 0x7FFFFFFF) {
|
||||
g_ge (flags, val+1);
|
||||
} else {
|
||||
/* Never true */
|
||||
Warning ("Condition is never true");
|
||||
AddCodeLine ("jsr return0");
|
||||
}
|
||||
}
|
||||
return;
|
||||
|
||||
default:
|
||||
typeerror (flags);
|
||||
}
|
||||
default:
|
||||
typeerror (flags);
|
||||
}
|
||||
|
||||
/* If we go here, we didn't emit code. Push the lhs on stack and fall
|
||||
* into the normal, non-optimized stuff.
|
||||
*/
|
||||
g_push (flags & ~CF_CONST, 0);
|
||||
/* If we go here, we didn't emit code. Push the lhs on stack and fall
|
||||
* into the normal, non-optimized stuff.
|
||||
*/
|
||||
g_push (flags & ~CF_CONST, 0);
|
||||
|
||||
}
|
||||
|
||||
@ -3850,84 +3824,58 @@ void g_ge (unsigned flags, unsigned long val)
|
||||
*/
|
||||
if (flags & CF_CONST) {
|
||||
|
||||
/* Give a warning in some special cases */
|
||||
if ((flags & CF_UNSIGNED) && val == 0) {
|
||||
Warning ("Condition is always true");
|
||||
AddCodeLine ("jsr return1");
|
||||
return;
|
||||
}
|
||||
/* Because the handling of the overflow flag is too complex for
|
||||
* inlining, we can handle only unsigned compares here.
|
||||
*/
|
||||
if (flags & CF_UNSIGNED) {
|
||||
|
||||
/* Look at the type */
|
||||
switch (flags & CF_TYPE) {
|
||||
/* Give a warning in some special cases */
|
||||
if (val == 0) {
|
||||
Warning ("Condition is always true");
|
||||
AddCodeLine ("jsr return1");
|
||||
return;
|
||||
}
|
||||
|
||||
case CF_CHAR:
|
||||
if (flags & CF_FORCECHAR) {
|
||||
AddCodeLine ("cmp #$%02X", (unsigned char)val);
|
||||
if (flags & CF_UNSIGNED) {
|
||||
AddCodeLine ("jsr booluge");
|
||||
} else {
|
||||
AddCodeLine ("jsr boolge");
|
||||
}
|
||||
return;
|
||||
}
|
||||
/* FALLTHROUGH */
|
||||
/* Look at the type */
|
||||
switch (flags & CF_TYPE) {
|
||||
|
||||
case CF_INT:
|
||||
if (flags & CF_UNSIGNED) {
|
||||
/* Unsigned compare */
|
||||
/* If the low byte is zero, we must only test the high byte */
|
||||
AddCodeLine ("cpx #$%02X", (unsigned char)(val >> 8));
|
||||
if ((val & 0xFF) != 0) {
|
||||
unsigned L = GetLocalLabel();
|
||||
AddCodeLine ("bne %s", LocalLabelName (L));
|
||||
AddCodeLine ("cmp #$%02X", (unsigned char)val);
|
||||
g_defcodelabel (L);
|
||||
}
|
||||
AddCodeLine ("jsr booluge");
|
||||
} else {
|
||||
/* Signed compare */
|
||||
if ((val & 0xFF) == 0) {
|
||||
/* Low byte is zero, just look at the high byte */
|
||||
AddCodeLine ("cpx #$%02X", (unsigned char)(val >> 8));
|
||||
} else {
|
||||
/* Subtract the two values */
|
||||
AddCodeLine ("cmp #$%02X", (unsigned char)val);
|
||||
AddCodeLine ("txa");
|
||||
AddCodeLine ("sbc #$%02X", (unsigned char)(val >> 8));
|
||||
}
|
||||
AddCodeLine ("jsr boolge");
|
||||
}
|
||||
return;
|
||||
case CF_CHAR:
|
||||
if (flags & CF_FORCECHAR) {
|
||||
AddCodeLine ("cmp #$%02X", (unsigned char)val);
|
||||
AddCodeLine ("jsr booluge");
|
||||
return;
|
||||
}
|
||||
/* FALLTHROUGH */
|
||||
|
||||
case CF_LONG:
|
||||
if ((flags & CF_UNSIGNED) == 0 && val == 0) {
|
||||
/* If we have a signed compare against zero, we only need to
|
||||
* test the high byte.
|
||||
*/
|
||||
AddCodeLine ("lda sreg+1");
|
||||
} else {
|
||||
/* Do a subtraction */
|
||||
AddCodeLine ("cmp #$%02X", (unsigned char)val);
|
||||
AddCodeLine ("txa");
|
||||
AddCodeLine ("sbc #$%02X", (unsigned char)(val >> 8));
|
||||
AddCodeLine ("lda sreg");
|
||||
AddCodeLine ("sbc #$%02X", (unsigned char)(val >> 16));
|
||||
AddCodeLine ("lda sreg+1");
|
||||
AddCodeLine ("sbc #$%02X", (unsigned char)(val >> 24));
|
||||
}
|
||||
/* Emit the proper makebool routine */
|
||||
if (flags & CF_UNSIGNED) {
|
||||
/* Unsigned compare */
|
||||
AddCodeLine ("jsr booluge");
|
||||
} else {
|
||||
/* Signed compare */
|
||||
AddCodeLine ("jsr boolge");
|
||||
}
|
||||
return;
|
||||
case CF_INT:
|
||||
/* If the low byte is zero, we must only test the high byte */
|
||||
AddCodeLine ("cpx #$%02X", (unsigned char)(val >> 8));
|
||||
if ((val & 0xFF) != 0) {
|
||||
unsigned L = GetLocalLabel();
|
||||
AddCodeLine ("bne %s", LocalLabelName (L));
|
||||
AddCodeLine ("cmp #$%02X", (unsigned char)val);
|
||||
g_defcodelabel (L);
|
||||
}
|
||||
AddCodeLine ("jsr booluge");
|
||||
return;
|
||||
|
||||
default:
|
||||
typeerror (flags);
|
||||
}
|
||||
case CF_LONG:
|
||||
/* Do a subtraction */
|
||||
AddCodeLine ("cmp #$%02X", (unsigned char)val);
|
||||
AddCodeLine ("txa");
|
||||
AddCodeLine ("sbc #$%02X", (unsigned char)(val >> 8));
|
||||
AddCodeLine ("lda sreg");
|
||||
AddCodeLine ("sbc #$%02X", (unsigned char)(val >> 16));
|
||||
AddCodeLine ("lda sreg+1");
|
||||
AddCodeLine ("sbc #$%02X", (unsigned char)(val >> 24));
|
||||
AddCodeLine ("jsr booluge");
|
||||
return;
|
||||
|
||||
default:
|
||||
typeerror (flags);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
/* If we go here, we didn't emit code. Push the lhs on stack and fall
|
||||
* into the normal, non-optimized stuff.
|
||||
|
||||
Loading…
Reference in New Issue
Block a user