Don't use FOR, they said. Do something else, they said.

S(0) <= "00000000";
S(1) <= "00000001";
S(2) <= "00000010";
S(3) <= "00000011";
S(4) <= "00000100";
S(5) <= "00000101";
S(6) <= "00000110";
S(7) <= "00000111";
S(8) <= "00001000";
S(9) <= "00001001";
S(10) <= "00001010";
S(11) <= "00001011";
S(12) <= "00001100";
S(13) <= "00001101";
S(14) <= "00001110";
S(15) <= "00001111";
S(16) <= "00010000";
S(17) <= "00010001";
S(18) <= "00010010";
S(19) <= "00010011";
S(20) <= "00010100";
S(21) <= "00010101";
S(22) <= "00010110";
S(23) <= "00010111";
S(24) <= "00011000";
S(25) <= "00011001";
S(26) <= "00011010";
S(27) <= "00011011";
S(28) <= "00011100";
S(29) <= "00011101";
S(30) <= "00011110";
S(31) <= "00011111";
S(32) <= "00100000";
S(33) <= "00100001";
S(34) <= "00100010";
S(35) <= "00100011";
S(36) <= "00100100";
S(37) <= "00100101";
S(38) <= "00100110";
S(39) <= "00100111";
S(40) <= "00101000";
S(41) <= "00101001";
S(42) <= "00101010";
S(43) <= "00101011";
S(44) <= "00101100";
S(45) <= "00101101";
S(46) <= "00101110";
S(47) <= "00101111";
S(48) <= "00110000";
S(49) <= "00110001";
S(50) <= "00110010";
S(51) <= "00110011";
S(52) <= "00110100";
S(53) <= "00110101";
S(54) <= "00110110";
S(55) <= "00110111";
S(56) <= "00111000";
S(57) <= "00111001";
S(58) <= "00111010";
S(59) <= "00111011";
S(60) <= "00111100";
S(61) <= "00111101";
S(62) <= "00111110";
S(63) <= "00111111";
S(64) <= "01000000";
S(65) <= "01000001";
S(66) <= "01000010";
S(67) <= "01000011";
S(68) <= "01000100";
S(69) <= "01000101";
S(70) <= "01000110";
S(71) <= "01000111";
S(72) <= "01001000";
S(73) <= "01001001";
S(74) <= "01001010";
S(75) <= "01001011";
S(76) <= "01001100";
S(77) <= "01001101";
S(78) <= "01001110";
S(79) <= "01001111";
S(80) <= "01010000";
S(81) <= "01010001";
S(82) <= "01010010";
S(83) <= "01010011";
S(84) <= "01010100";
S(85) <= "01010101";
S(86) <= "01010110";
S(87) <= "01010111";
S(88) <= "01011000";
S(89) <= "01011001";
S(90) <= "01011010";
S(91) <= "01011011";
S(92) <= "01011100";
S(93) <= "01011101";
S(94) <= "01011110";
S(95) <= "01011111";
S(96) <= "01100000";
S(97) <= "01100001";
S(98) <= "01100010";
S(99) <= "01100011";
S(100) <= "01100100";
S(101) <= "01100101";
S(102) <= "01100110";
S(103) <= "01100111";
S(104) <= "01101000";
S(105) <= "01101001";
S(106) <= "01101010";
S(107) <= "01101011";
S(108) <= "01101100";
S(109) <= "01101101";
S(110) <= "01101110";
S(111) <= "01101111";
S(112) <= "01110000";
S(113) <= "01110001";
S(114) <= "01110010";
S(115) <= "01110011";
S(116) <= "01110100";
S(117) <= "01110101";
S(118) <= "01110110";
S(119) <= "01110111";
S(120) <= "01111000";
S(121) <= "01111001";
S(122) <= "01111010";
S(123) <= "01111011";
S(124) <= "01111100";
S(125) <= "01111101";
S(126) <= "01111110";
S(127) <= "01111111";
S(128) <= "10000000";
S(129) <= "10000001";
S(130) <= "10000010";
S(131) <= "10000011";
S(132) <= "10000100";
S(133) <= "10000101";
S(134) <= "10000110";
S(135) <= "10000111";
S(136) <= "10001000";
S(137) <= "10001001";
S(138) <= "10001010";
S(139) <= "10001011";
S(140) <= "10001100";
S(141) <= "10001101";
S(142) <= "10001110";
S(143) <= "10001111";
S(144) <= "10010000";
S(145) <= "10010001";
S(146) <= "10010010";
S(147) <= "10010011";
S(148) <= "10010100";
S(149) <= "10010101";
S(150) <= "10010110";
S(151) <= "10010111";
S(152) <= "10011000";
S(153) <= "10011001";
S(154) <= "10011010";
S(155) <= "10011011";
S(156) <= "10011100";
S(157) <= "10011101";
S(158) <= "10011110";
S(159) <= "10011111";
S(160) <= "10100000";
S(161) <= "10100001";
S(162) <= "10100010";
S(163) <= "10100011";
S(164) <= "10100100";
S(165) <= "10100101";
S(166) <= "10100110";
S(167) <= "10100111";
S(168) <= "10101000";
S(169) <= "10101001";
S(170) <= "10101010";
S(171) <= "10101011";
S(172) <= "10101100";
S(173) <= "10101101";
S(174) <= "10101110";
S(175) <= "10101111";
S(176) <= "10110000";
S(177) <= "10110001";
S(178) <= "10110010";
S(179) <= "10110011";
S(180) <= "10110100";
S(181) <= "10110101";
S(182) <= "10110110";
S(183) <= "10110111";
S(184) <= "10111000";
S(185) <= "10111001";
S(186) <= "10111010";
S(187) <= "10111011";
S(188) <= "10111100";
S(189) <= "10111101";
S(190) <= "10111110";
S(191) <= "10111111";
S(192) <= "11000000";
S(193) <= "11000001";
S(194) <= "11000010";
S(195) <= "11000011";
S(196) <= "11000100";
S(197) <= "11000101";
S(198) <= "11000110";
S(199) <= "11000111";
S(200) <= "11001000";
S(201) <= "11001001";
S(202) <= "11001010";
S(203) <= "11001011";
S(204) <= "11001100";
S(205) <= "11001101";
S(206) <= "11001110";
S(207) <= "11001111";
S(208) <= "11010000";
S(209) <= "11010001";
S(210) <= "11010010";
S(211) <= "11010011";
S(212) <= "11010100";
S(213) <= "11010101";
S(214) <= "11010110";
S(215) <= "11010111";
S(216) <= "11011000";
S(217) <= "11011001";
S(218) <= "11011010";
S(219) <= "11011011";
S(220) <= "11011100";
S(221) <= "11011101";
S(222) <= "11011110";
S(223) <= "11011111";
S(224) <= "11100000";
S(225) <= "11100001";
S(226) <= "11100010";
S(227) <= "11100011";
S(228) <= "11100100";
S(229) <= "11100101";
S(230) <= "11100110";
S(231) <= "11100111";
S(232) <= "11101000";
S(233) <= "11101001";
S(234) <= "11101010";
S(235) <= "11101011";
S(236) <= "11101100";
S(237) <= "11101101";
S(238) <= "11101110";
S(239) <= "11101111";
S(240) <= "11110000";
S(241) <= "11110001";
S(242) <= "11110010";
S(243) <= "11110011";
S(244) <= "11110100";
S(245) <= "11110101";
S(246) <= "11110110";
S(247) <= "11110111";
S(248) <= "11111000";
S(249) <= "11111001";
S(250) <= "11111010";
S(251) <= "11111011";
S(252) <= "11111100";
S(253) <= "11111101";
S(254) <= "11111110";
S(255) <= "11111111";