X-Git-Url: https://git.llucax.com/software/druntime.git/blobdiff_plain/5a07183e26b7ca151959629420a83f59af5339f3..0edf44cfdbe2262d5c50bfa7368ba2692600babc:/import/std/intrinsic.di diff --git a/import/std/intrinsic.di b/import/std/intrinsic.di index c5c8110..b82f07c 100644 --- a/import/std/intrinsic.di +++ b/import/std/intrinsic.di @@ -1,176 +1,176 @@ -/** - * These functions are built-in intrinsics to the compiler. - * - * Intrinsic functions are functions built in to the compiler, usually to take - * advantage of specific CPU features that are inefficient to handle via - * external functions. The compiler's optimizer and code generator are fully - * integrated in with intrinsic functions, bringing to bear their full power on - * them. This can result in some surprising speedups. - * - * Copyright: Public Domain - * License: Public Domain - * Authors: Walter Bright - */ -module std.intrinsic; - - -/** - * Scans the bits in v starting with bit 0, looking - * for the first set bit. - * Returns: - * The bit number of the first bit set. - * The return value is undefined if v is zero. - */ -int bsf( uint v ); - - -/** - * Scans the bits in v from the most significant bit - * to the least significant bit, looking - * for the first set bit. - * Returns: - * The bit number of the first bit set. - * The return value is undefined if v is zero. - * Example: - * --- - * import std.intrinsic; - * - * int main() - * { - * uint v; - * int x; - * - * v = 0x21; - * x = bsf(v); - * printf("bsf(x%x) = %d\n", v, x); - * x = bsr(v); - * printf("bsr(x%x) = %d\n", v, x); - * return 0; - * } - * --- - * Output: - * bsf(x21) = 0
- * bsr(x21) = 5 - */ -int bsr( uint v ); - - -/** - * Tests the bit. - */ -int bt( uint* p, uint bitnum ); - - -/** - * Tests and complements the bit. - */ -int btc( uint* p, uint bitnum ); - - -/** - * Tests and resets (sets to 0) the bit. - */ -int btr( uint* p, uint bitnum ); - - -/** - * Tests and sets the bit. - * Params: - * p = a non-NULL pointer to an array of uints. - * index = a bit number, starting with bit 0 of p[0], - * and progressing. It addresses bits like the expression: ---- -p[index / (uint.sizeof*8)] & (1 << (index & ((uint.sizeof*8) - 1))) ---- - * Returns: - * A non-zero value if the bit was set, and a zero - * if it was clear. - * - * Example: - * --- -import std.intrinsic; - -int main() -{ - uint array[2]; - - array[0] = 2; - array[1] = 0x100; - - printf("btc(array, 35) = %d\n", btc(array, 35)); - printf("array = [0]:x%x, [1]:x%x\n", array[0], array[1]); - - printf("btc(array, 35) = %d\n", btc(array, 35)); - printf("array = [0]:x%x, [1]:x%x\n", array[0], array[1]); - - printf("bts(array, 35) = %d\n", bts(array, 35)); - printf("array = [0]:x%x, [1]:x%x\n", array[0], array[1]); - - printf("btr(array, 35) = %d\n", btr(array, 35)); - printf("array = [0]:x%x, [1]:x%x\n", array[0], array[1]); - - printf("bt(array, 1) = %d\n", bt(array, 1)); - printf("array = [0]:x%x, [1]:x%x\n", array[0], array[1]); - - return 0; -} - * --- - * Output: -
-btc(array, 35) = 0
-array = [0]:x2, [1]:x108
-btc(array, 35) = -1
-array = [0]:x2, [1]:x100
-bts(array, 35) = 0
-array = [0]:x2, [1]:x108
-btr(array, 35) = -1
-array = [0]:x2, [1]:x100
-bt(array, 1) = -1
-array = [0]:x2, [1]:x100
-
- */ -int bts( uint* p, uint bitnum ); - - -/** - * Swaps bytes in a 4 byte uint end-to-end, i.e. byte 0 becomes - * byte 3, byte 1 becomes byte 2, byte 2 becomes byte 1, byte 3 - * becomes byte 0. - */ -uint bswap( uint v ); - - -/** - * Reads I/O port at port_address. - */ -ubyte inp( uint port_address ); - - -/** - * ditto - */ -ushort inpw( uint port_address ); - - -/** - * ditto - */ -uint inpl( uint port_address ); - - -/** - * Writes and returns value to I/O port at port_address. - */ -ubyte outp( uint port_address, ubyte value ); - - -/** - * ditto - */ -ushort outpw( uint port_address, ushort value ); - - -/** - * ditto - */ -uint outpl( uint port_address, uint value ); +/** + * These functions are built-in intrinsics to the compiler. + * + * Intrinsic functions are functions built in to the compiler, usually to take + * advantage of specific CPU features that are inefficient to handle via + * external functions. The compiler's optimizer and code generator are fully + * integrated in with intrinsic functions, bringing to bear their full power on + * them. This can result in some surprising speedups. + * + * Copyright: Public Domain + * License: Public Domain + * Authors: Walter Bright + */ +module std.intrinsic; + + +/** + * Scans the bits in v starting with bit 0, looking + * for the first set bit. + * Returns: + * The bit number of the first bit set. + * The return value is undefined if v is zero. + */ +int bsf( uint v ); + + +/** + * Scans the bits in v from the most significant bit + * to the least significant bit, looking + * for the first set bit. + * Returns: + * The bit number of the first bit set. + * The return value is undefined if v is zero. + * Example: + * --- + * import std.intrinsic; + * + * int main() + * { + * uint v; + * int x; + * + * v = 0x21; + * x = bsf(v); + * printf("bsf(x%x) = %d\n", v, x); + * x = bsr(v); + * printf("bsr(x%x) = %d\n", v, x); + * return 0; + * } + * --- + * Output: + * bsf(x21) = 0
+ * bsr(x21) = 5 + */ +int bsr( uint v ); + + +/** + * Tests the bit. + */ +int bt( const uint* p, uint bitnum ); + + +/** + * Tests and complements the bit. + */ +int btc( uint* p, uint bitnum ); + + +/** + * Tests and resets (sets to 0) the bit. + */ +int btr( uint* p, uint bitnum ); + + +/** + * Tests and sets the bit. + * Params: + * p = a non-NULL pointer to an array of uints. + * index = a bit number, starting with bit 0 of p[0], + * and progressing. It addresses bits like the expression: +--- +p[index / (uint.sizeof*8)] & (1 << (index & ((uint.sizeof*8) - 1))) +--- + * Returns: + * A non-zero value if the bit was set, and a zero + * if it was clear. + * + * Example: + * --- +import std.intrinsic; + +int main() +{ + uint array[2]; + + array[0] = 2; + array[1] = 0x100; + + printf("btc(array, 35) = %d\n", btc(array, 35)); + printf("array = [0]:x%x, [1]:x%x\n", array[0], array[1]); + + printf("btc(array, 35) = %d\n", btc(array, 35)); + printf("array = [0]:x%x, [1]:x%x\n", array[0], array[1]); + + printf("bts(array, 35) = %d\n", bts(array, 35)); + printf("array = [0]:x%x, [1]:x%x\n", array[0], array[1]); + + printf("btr(array, 35) = %d\n", btr(array, 35)); + printf("array = [0]:x%x, [1]:x%x\n", array[0], array[1]); + + printf("bt(array, 1) = %d\n", bt(array, 1)); + printf("array = [0]:x%x, [1]:x%x\n", array[0], array[1]); + + return 0; +} + * --- + * Output: +
+btc(array, 35) = 0
+array = [0]:x2, [1]:x108
+btc(array, 35) = -1
+array = [0]:x2, [1]:x100
+bts(array, 35) = 0
+array = [0]:x2, [1]:x108
+btr(array, 35) = -1
+array = [0]:x2, [1]:x100
+bt(array, 1) = -1
+array = [0]:x2, [1]:x100
+
+ */ +int bts( uint* p, uint bitnum ); + + +/** + * Swaps bytes in a 4 byte uint end-to-end, i.e. byte 0 becomes + * byte 3, byte 1 becomes byte 2, byte 2 becomes byte 1, byte 3 + * becomes byte 0. + */ +uint bswap( uint v ); + + +/** + * Reads I/O port at port_address. + */ +ubyte inp( uint port_address ); + + +/** + * ditto + */ +ushort inpw( uint port_address ); + + +/** + * ditto + */ +uint inpl( uint port_address ); + + +/** + * Writes and returns value to I/O port at port_address. + */ +ubyte outp( uint port_address, ubyte value ); + + +/** + * ditto + */ +ushort outpw( uint port_address, ushort value ); + + +/** + * ditto + */ +uint outpl( uint port_address, uint value );