blob: 548cbcb08843a44f88f0ae357ff4429496c265aa [file] [log] [blame]
%default {"preinstr":"", "result":"a0", "chkzero":"0"}
/*
* Generic 32-bit "/2addr" binary operation. Provide an "instr" line
* that specifies an instruction that performs "result = a0 op a1".
* This could be an MIPS instruction or a function call.
*
* If "chkzero" is set to 1, we perform a divide-by-zero check on
* vCC (a1). Useful for integer division and modulus.
*
* For: add-int/2addr, sub-int/2addr, mul-int/2addr, div-int/2addr,
* rem-int/2addr, and-int/2addr, or-int/2addr, xor-int/2addr,
* shl-int/2addr, shr-int/2addr, ushr-int/2addr
*/
/* binop/2addr vA, vB */
GET_OPA4(rOBJ) # rOBJ <- A+
GET_OPB(a3) # a3 <- B
GET_VREG(a0, rOBJ) # a0 <- vA
GET_VREG(a1, a3) # a1 <- vB
.if $chkzero
# is second operand zero?
beqz a1, common_errDivideByZero
.endif
FETCH_ADVANCE_INST(1) # advance rPC, load rINST
$preinstr # optional op
$instr # $result <- op, a0-a3 changed
GET_INST_OPCODE(t0) # extract opcode from rINST
SET_VREG_GOTO($result, rOBJ, t0) # vAA <- $result
/* 10-13 instructions */