24531904_j

}
割り込み : 無効操作フ ォ ル ト
tmp_rel = x[i] == y[i];
else // ‘gt’
tmp_rel = greater_signed(sign_ext(x[i], 8),
sign_ext(y[i], 8));
if (tmp_rel)
res[i] = 0xff;
else
res[i] = 0x00;
}
GR[r1 ] = concatenate8(res[7], res[6], res[5], res[4],
res[3], res[2], res[1], res[0]);
} else if (two_byte_form) { // two-byte elements
x[0] = GR[r2 ]{15:0}; y[0] = GR[r3 ]{15:0};
x[1] = GR[r2 ]{31:16}; y[1] = GR[r3 ]{31:16};
x[2] = GR[r2 ]{47:32}; y[2] = GR[r3 ]{47:32};
x[3] = GR[r2 ]{63:48}; y[3] = GR[r3 ]{63:48};
for (i = 0; i < 4; i++) {
if (prel == ‘eq’)
tmp_rel = x[i] == y[i];
else // ‘gt’
tmp_rel = greater_signed(sign_ext(x[i], 16),
sign_ext(y[i], 16));
if (tmp_rel)
res[i] = 0xffff;
else
res[i] = 0x0000;
}
GR[r1 ] = concatenate4(res[3], res[2], res[1], res[0]);
} else { // four-byte elements
x[0] = GR[r2 ]{31:0}; y[0] = GR[r3 ]{31:0};
x[1] = GR[r2 ]{63:32}; y[1] = GR[r3 ]{63:32};
for (i = 0; i < 2; i++) {
if (prel == ‘eq’)
tmp_rel = x[i] == y[i];
else // ‘gt’
tmp_rel = greater_signed(sign_ext(x[i], 32),
sign_ext(y[i], 32));
if (tmp_rel)
res[i] = 0xffffffff;
else
res[i] = 0x00000000;
}
GR[r 1] = concatenate2(res[1], res[0]);
}
GR[r 1 ].nat = GR[r 2 ].nat || GR[r 3 ].nat;
pcmp
3:186 第 3 巻 : 命令リファレンス