blob: 45d8d829602aec518809939610e2eba9bf5d9896 [file] [log] [blame]
%default {"preinstr":"", "result":"a0", "chkzero":"0"}
/*
* Generic 64-bit "/2addr" binary operation. Provide an "instr" line
* that specifies an instruction that performs "result = a0 op a1".
* This could be a MIPS instruction or a function call. (If the result
* comes back in a register other than a0, you can override "result".)
*
* If "chkzero" is set to 1, we perform a divide-by-zero check on
* vB (a1). Useful for integer division and modulus. Note that we
* *don't* check for (LONG_MIN / -1) here, because the CPU handles it
* correctly.
*
* For: add-long/2addr, sub-long/2addr, mul-long/2addr, div-long/2addr,
* rem-long/2addr, and-long/2addr, or-long/2addr, xor-long/2addr,
* shl-long/2addr, shr-long/2addr, ushr-long/2addr
*/
/* binop/2addr vA, vB */
ext a2, rINST, 8, 4 # a2 <- A
ext a3, rINST, 12, 4 # a3 <- B
GET_VREG_WIDE a0, a2 # a0 <- vA
GET_VREG_WIDE a1, a3 # a1 <- vB
.if $chkzero
beqz a1, common_errDivideByZero # is second operand zero?
.endif
FETCH_ADVANCE_INST 1 # advance rPC, load rINST
$preinstr # optional op
$instr # $result <- op, a0-a3 changed
GET_INST_OPCODE v0 # extract opcode from rINST
SET_VREG_WIDE $result, a2 # vA <- $result
GOTO_OPCODE v0 # jump to next instruction