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Check for shift count zero

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git-svn-id: svn://svn.cc65.org/cc65/trunk@1055 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz
2001-10-17 21:46:27 +00:00
parent 03229b3253
commit 43530d1604
1 changed files with 30 additions and 26 deletions
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20
src/cc65/codegen.c
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@@ -2848,12 +2848,11 @@ void g_asr (unsigned flags, unsigned long val)
AddCodeLine ("txa"); AddCodeLine ("txa");
ldxconst (0); ldxconst (0);
val -= 8; val -= 8;
}
if (val == 0) { if (val == 0) {
/* Done */ /* Done */
return; return;
} } else if (val >= 1 && val <= 4) {
}
if (val >= 1 && val <= 4) {
if (flags & CF_UNSIGNED) { if (flags & CF_UNSIGNED) {
AddCodeLine ("jsr shrax%ld", val); AddCodeLine ("jsr shrax%ld", val);
} else { } else {
@@ -2864,7 +2863,10 @@ void g_asr (unsigned flags, unsigned long val)
break; break;
case CF_LONG: case CF_LONG:
if (val >= 1 && val <= 4) { if (val == 0) {
/* Nothing to do */
return;
} else if (val >= 1 && val <= 4) {
if (flags & CF_UNSIGNED) { if (flags & CF_UNSIGNED) {
AddCodeLine ("jsr shreax%ld", val); AddCodeLine ("jsr shreax%ld", val);
} else { } else {
@@ -2936,12 +2938,11 @@ void g_asl (unsigned flags, unsigned long val)
AddCodeLine ("tax"); AddCodeLine ("tax");
AddCodeLine ("lda #$00"); AddCodeLine ("lda #$00");
val -= 8; val -= 8;
}
if (val == 0) { if (val == 0) {
/* Done */ /* Done */
return; return;
} } else if (val >= 1 && val <= 4) {
}
if (val >= 1 && val <= 4) {
if (flags & CF_UNSIGNED) { if (flags & CF_UNSIGNED) {
AddCodeLine ("jsr shlax%ld", val); AddCodeLine ("jsr shlax%ld", val);
} else { } else {
@@ -2952,7 +2953,10 @@ void g_asl (unsigned flags, unsigned long val)
break; break;
case CF_LONG: case CF_LONG:
if (val >= 1 && val <= 4) { if (val == 0) {
/* Nothing to do */
return;
} else if (val >= 1 && val <= 4) {
if (flags & CF_UNSIGNED) { if (flags & CF_UNSIGNED) {
AddCodeLine ("jsr shleax%ld", val); AddCodeLine ("jsr shleax%ld", val);
} else { } else {