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big: Add constants.

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This commit is contained in:
Jeroen van Rijn
2021-08-11 20:59:52 +02:00
parent 97d80d03f9
commit fc0a92f8ac
3 changed files with 133 additions and 59 deletions
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core/math/big/common.odin
+33 -27
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@@ -26,10 +26,15 @@ when _LOW_MEMORY {
_DEFAULT_DIGIT_COUNT :: 32;
}
_MUL_KARATSUBA_CUTOFF :: #config(MUL_KARATSUBA_CUTOFF, _DEFAULT_MUL_KARATSUBA_CUTOFF);
_SQR_KARATSUBA_CUTOFF :: #config(SQR_KARATSUBA_CUTOFF, _DEFAULT_SQR_KARATSUBA_CUTOFF);
_MUL_TOOM_CUTOFF :: #config(MUL_TOOM_CUTOFF, _DEFAULT_MUL_TOOM_CUTOFF);
_SQR_TOOM_CUTOFF :: #config(SQR_TOOM_CUTOFF, _DEFAULT_SQR_TOOM_CUTOFF);
/*
`initialize_constants` returns `#config(MUL_KARATSUBA_CUTOFF, _DEFAULT_MUL_KARATSUBA_CUTOFF)`
and we initialize this cutoff that way so that the procedure is used and called,
because it handles initializing the constants ONE, ZERO, MINUS_ONE, NAN and INF.
*/
_MUL_KARATSUBA_CUTOFF := initialize_constants();
_SQR_KARATSUBA_CUTOFF := #config(SQR_KARATSUBA_CUTOFF, _DEFAULT_SQR_KARATSUBA_CUTOFF);
_MUL_TOOM_CUTOFF := #config(MUL_TOOM_CUTOFF, _DEFAULT_MUL_TOOM_CUTOFF);
_SQR_TOOM_CUTOFF := #config(SQR_TOOM_CUTOFF, _DEFAULT_SQR_TOOM_CUTOFF);
/*
These defaults were tuned on an AMD A8-6600K (64-bit) using libTomMath's `make tune`.
@@ -59,9 +64,10 @@ Sign :: enum u8 {
};
Int :: struct {
used: int,
digit: [dynamic]DIGIT,
sign: Sign,
used: int,
digit: [dynamic]DIGIT,
sign: Sign,
flags: Flags,
};
Flag :: enum u8 {
@@ -76,35 +82,35 @@ Flags :: bit_set[Flag; u8];
Errors are a strict superset of runtime.Allocation_Error.
*/
Error :: enum int {
Out_Of_Memory = 1,
Invalid_Pointer = 2,
Invalid_Argument = 3,
Out_Of_Memory = 1,
Invalid_Pointer = 2,
Invalid_Argument = 3,
Unknown_Error = 4,
Max_Iterations_Reached = 5,
Buffer_Overflow = 6,
Integer_Overflow = 7,
Assignment_To_Immutable = 4,
Max_Iterations_Reached = 5,
Buffer_Overflow = 6,
Integer_Overflow = 7,
Division_by_Zero = 8,
Math_Domain_Error = 9,
Division_by_Zero = 8,
Math_Domain_Error = 9,
Unimplemented = 127,
Unimplemented = 127,
};
Error_String :: #partial [Error]string{
.Out_Of_Memory = "Out of memory",
.Invalid_Pointer = "Invalid pointer",
.Invalid_Argument = "Invalid argument",
.Out_Of_Memory = "Out of memory",
.Invalid_Pointer = "Invalid pointer",
.Invalid_Argument = "Invalid argument",
.Unknown_Error = "Unknown error",
.Max_Iterations_Reached = "Max iterations reached",
.Buffer_Overflow = "Buffer overflow",
.Integer_Overflow = "Integer overflow",
.Assignment_To_Immutable = "Assignment to immutable",
.Max_Iterations_Reached = "Max iterations reached",
.Buffer_Overflow = "Buffer overflow",
.Integer_Overflow = "Integer overflow",
.Division_by_Zero = "Division by zero",
.Math_Domain_Error = "Math domain error",
.Division_by_Zero = "Division by zero",
.Math_Domain_Error = "Math domain error",
.Unimplemented = "Unimplemented",
.Unimplemented = "Unimplemented",
};
Primality_Flag :: enum u8 {