- case OPCODE_RCC: /* clamped riciprocal */
- {
- const float largest = 1.884467e+19, smallest = 5.42101e-20;
- GLfloat a[4], r, result[4];
- fetch_vector1(&inst->SrcReg[0], machine, a);
- if (DEBUG_PROG) {
- if (a[0] == 0)
- printf("RCC(0)\n");
- else if (IS_INF_OR_NAN(a[0]))
- printf("RCC(inf)\n");
- }
- if (a[0] == 1.0F) {
- r = 1.0F;
- }
- else {
- r = 1.0F / a[0];
- }
- if (positive(r)) {
- if (r > largest) {
- r = largest;
- }
- else if (r < smallest) {
- r = smallest;
- }
- }
- else {
- if (r < -largest) {
- r = -largest;
- }
- else if (r > -smallest) {
- r = -smallest;
- }
- }
- result[0] = result[1] = result[2] = result[3] = r;
- store_vector4(inst, machine, result);
- }
- break;