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Merge change 1740

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* changes:
  Implement <, >, ==, !=, >= <=, &&, and ||.
This commit is contained in:
Android (Google) Code Review 2009-05-14 19:42:17 -07:00
commit 243fb9ff0f
1 changed files with 36 additions and 15 deletions
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51
libacc/acc.cpp
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@ -269,7 +269,7 @@ class compiler {
fprintf(stderr, "functionExit(%d, %d, %d);\n", argCount, localVariableAddress, localVariableSize);
// Patch local variable allocation code:
if (localVariableSize < 0 || localVariableSize > 255) {
error("LocalVariableSize");
error("localVariables out of range: %d", localVariableSize);
}
*(char*) (localVariableAddress) = localVariableSize;
@ -282,7 +282,7 @@ class compiler {
// sp -> arg0 ....
if (argCount > 0) {
// We store the PC into the lr so we can adjust the sp before
// returning. (We need to pull off the registers we pushed
// returning. We need to pull off the registers we pushed
// earlier. We don't need to actually store them anywhere,
// just adjust the stack.
int regArgCount = argCount <= 4 ? argCount : 4;
@ -309,28 +309,49 @@ class compiler {
virtual int gjmp(int t) {
fprintf(stderr, "gjmp(%d);\n", t);
return o4(0xEA000000 + encodeAddress(t)); // b .L33
return o4(0xEA000000 | encodeAddress(t)); // b .L33
}
/* l = 0: je, l == 1: jne */
virtual int gtst(bool l, int t) {
fprintf(stderr, "gtst(%d, %d);\n", l, t);
error("Unimplemented");
o(0x0fc085); /* test %eax, %eax, je/jne xxx */
return psym(0x84 + l, t);
o4(0xE3500000); // cmp r0,#0
int branch = l ? 0x1A000000 : 0x0A000000; // bne : beq
return o4(branch | encodeAddress(t));
}
virtual void gcmp(int op) {
fprintf(stderr, "gcmp(%d);\n", op);
error("Unimplemented");
#if 0
int t = decodeOp(op);
o(0xc139); /* cmp %eax,%ecx */
li(0);
o(0x0f); /* setxx %al */
o(t + 0x90);
o(0xc0);
#endif
o4(0xE1510000); // cmp r1, r1
switch(op) {
case OP_EQUALS:
o4(0x03A00001); // moveq r0,#1
o4(0x13A00000); // movne r0,#0
break;
case OP_NOT_EQUALS:
o4(0x03A00000); // moveq r0,#0
o4(0x13A00001); // movne r0,#1
break;
case OP_LESS_EQUAL:
o4(0xD3A00001); // movle r0,#1
o4(0xC3A00000); // movgt r0,#0
break;
case OP_GREATER:
o4(0xD3A00000); // movle r0,#0
o4(0xC3A00001); // movgt r0,#1
break;
case OP_GREATER_EQUAL:
o4(0xA3A00001); // movge r0,#1
o4(0xB3A00000); // movlt r0,#0
break;
case OP_LESS:
o4(0xA3A00000); // movge r0,#0
o4(0xB3A00001); // movlt r0,#1
break;
default:
error("Unknown comparison op %d", op);
break;
}
}
virtual void genOp(int op) {