diff --git a/src/minivec.h b/src/minivec.h index a646cf4..3864694 100644 --- a/src/minivec.h +++ b/src/minivec.h @@ -55,10 +55,17 @@ Fp8IsZero(fp8 num) static inline float Fp8ToFloat4(fp8 num) { - float lookup[128] = {0, 0.0000152587890625, 0.000030517578125, 0.0000457763671875, 0.00006103515625, 0.0000762939453125, 0.000091552734375, 0.000106812, 0.00012207, 0.000152588, 0.000183105, 0.000213623, 0.000244141, 0.000305176, 0.000366211, 0.000427246, 0.000488281, 0.000610352, 0.000732422, 0.000854492, 0.000976562, 0.0012207, 0.00146484, 0.00170898, 0.00195312, 0.00244141, 0.00292969, 0.00341797, 0.00390625, 0.00488281, 0.00585938, 0.00683594, 0.0078125, 0.00976562, 0.0117188, 0.0136719, 0.015625, 0.0195312, 0.0234375, 0.0273438, 0.03125, 0.0390625, 0.046875, 0.0546875, 0.0625, 0.078125, 0.09375, 0.109375, 0.125, 0.15625, 0.1875, 0.21875, 0.25, 0.3125, 0.375, 0.4375, 0.5, 0.625, 0.75, 0.875, 1, 1.25, 1.5, 1.75, 2, 2.5, 3, 3.5, 4, 5, 6, 7, 8, 10, 12, 14, 16, 20, 24, 28, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384, 448, 512, 640, 768, 896, 1024, 1280, 1536, 1792, 2048, 2560, 3072, 3584, 4096, 5120, 6144, 7168, 8192, 10240, 12288, 14336, 16384, 20480, 24576, 28672, 32768, 40960, 49152, 57344, INFINITY, NAN, NAN, NAN}; - float v = lookup[num & 0x7F]; + uint32 lookup[128] = {0, 931135488, 939524096, 943718400, 947912704, 950009856, 952107008, 954204160, 956301312, 958398464, 960495616, 962592768, 964689920, 966787072, 968884224, 970981376, 973078528, 975175680, 977272832, 979369984, 981467136, 983564288, 985661440, 987758592, 989855744, 991952896, 994050048, 996147200, 998244352, 1000341504, 1002438656, 1004535808, 1006632960, 1008730112, 1010827264, 1012924416, 1015021568, 1017118720, 1019215872, 1021313024, 1023410176, 1025507328, 1027604480, 1029701632, 1031798784, 1033895936, 1035993088, 1038090240, 1040187392, 1042284544, 1044381696, 1046478848, 1048576000, 1050673152, 1052770304, 1054867456, 1056964608, 1059061760, 1061158912, 1063256064, 1065353216, 1067450368, 1069547520, 1071644672, 1073741824, 1075838976, 1077936128, 1080033280, 1082130432, 1084227584, 1086324736, 1088421888, 1090519040, 1092616192, 1094713344, 1096810496, 1098907648, 1101004800, 1103101952, 1105199104, 1107296256, 1109393408, 1111490560, 1113587712, 1115684864, 1117782016, 1119879168, 1121976320, 1124073472, 1126170624, 1128267776, 1130364928, 1132462080, 1134559232, 1136656384, 1138753536, 1140850688, 1142947840, 1145044992, 1147142144, 1149239296, 1151336448, 1153433600, 1155530752, 1157627904, 1159725056, 1161822208, 1163919360, 1166016512, 1168113664, 1170210816, 1172307968, 1174405120, 1176502272, 1178599424, 1180696576, 1182793728, 1184890880, 1186988032, 1189085184, 1191182336, 1193279488, 1195376640, 1197473792, 2139095040, 2145386496, 2143289344, 2145386496}; - return (num & 0x80) == 0x80 ? -v : v; + union + { + float f; + uint32 i; + } swap; + + swap.i = lookup[num & 0x7F]; + + return (num & 0x80) == 0x80 ? -swap.f : swap.f; } /* diff --git a/test/expected/minivec.out b/test/expected/minivec.out index 7b9bc4e..034eb1c 100644 --- a/test/expected/minivec.out +++ b/test/expected/minivec.out @@ -169,11 +169,7 @@ SELECT '[1,2,3]'::minivec + '[4,5,6]'; (1 row) SELECT '[61439]'::minivec + '[61439]'; - ?column? ----------- - [NaN] -(1 row) - +ERROR: value out of range: overflow SELECT '[1,2]'::minivec + '[3]'; ERROR: different minivec dimensions 2 and 1 SELECT '[1,2,3]'::minivec - '[4,5,6]';