24531904_j

操作 : if (PR[qp]) {
check_target_register(r 1);
}
割り込み : 無効操作フ ォ ル ト
3:176 第 3 巻 : 命令リファレンス
pack
if (two_byte_form) {
if (signed_saturation_form) {
max = sign_ext(0x7f, 8);
min = sign_ext(0x80, 8);
} else { // unsigned_saturation_form
max = 0xff;
min = 0x00;
}
temp[0] = sign_ext(GR[r 2 ]{15:0}, 16);
temp[1] = sign_ext(GR[r 2 ]{31:16}, 16);
temp[2] = sign_ext(GR[r 2 ]{47:32}, 16);
temp[3] = sign_ext(GR[r 2 ]{63:48}, 16);
temp[4] = sign_ext(GR[r 3 ]{15:0}, 16);
temp[5] = sign_ext(GR[r 3 ]{31:16}, 16);
temp[6] = sign_ext(GR[r 3 ]{47:32}, 16);
temp[7] = sign_ext(GR[r 3 ]{63:48}, 16);
for (i = 0; i < 8; i++) {
if (temp[i] > max)
temp[i] = max;
}
if (temp[i] < min)
temp[i] = min;
GR[r 1 ] = concatenate8(temp[7], temp[6], temp[5], temp[4],
temp[3], temp[2], temp[1], temp[0]);
} else { // four_byte_form
max = sign_ext(0x7fff, 16); // signed_saturation_form
min = sign_ext(0x8000, 16);
temp[0] = sign_ext(GR[r 2 ]{31:0}, 32);
temp[1] = sign_ext(GR[r 2 ]{63:32}, 32);
temp[2] = sign_ext(GR[r 3]{31:0}, 32);
temp[3] = sign_ext(GR[r 3 ]{63:32}, 32);
for (i = 0; i < 4; i++) {
if (temp[i] > max)
temp[i] = max;
}
if (temp[i] < min)
temp[i] = min;
GR[r1 ] = concatenate4(temp[3], temp[2], temp[1], temp[0]);
}
GR[r1 ].nat = GR[r2 ].nat || GR[r3 ].nat;