gmp_libmpn_sec_mul Method |
Set R to A * B, where A = {ap, an}, B = {bp, bn}, and R = {rp, an + bn}.
Namespace:
Math.Gmp.Native
Assembly:
Math.Gmp.Native (in Math.Gmp.Native.dll) Version: 1.0.0.0 (1.0.0.0)
Syntax public static void mpn_sec_mul(
mp_ptr rp,
mp_ptr ap,
mp_size_t an,
mp_ptr bp,
mp_size_t bn,
mp_ptr tp
)
Public Shared Sub mpn_sec_mul (
rp As mp_ptr,
ap As mp_ptr,
an As mp_size_t,
bp As mp_ptr,
bn As mp_size_t,
tp As mp_ptr
)
public:
static void mpn_sec_mul(
mp_ptr^ rp,
mp_ptr^ ap,
mp_size_t an,
mp_ptr^ bp,
mp_size_t bn,
mp_ptr^ tp
)
static member mpn_sec_mul :
rp : mp_ptr *
ap : mp_ptr *
an : mp_size_t *
bp : mp_ptr *
bn : mp_size_t *
tp : mp_ptr -> unit
Parameters
- rp
- Type: Math.Gmp.Nativemp_ptr
The result integer. - ap
- Type: Math.Gmp.Nativemp_ptr
The first operand integer. - an
- Type: Math.Gmp.Nativemp_size_t
The number of limbs of ap. - bp
- Type: Math.Gmp.Nativemp_ptr
The second operand integer. - bn
- Type: Math.Gmp.Nativemp_size_t
The number of limbs of bp. - tp
- Type: Math.Gmp.Nativemp_ptr
The scratch operand integer.
Remarks
It is required that an ≥ bn > 0.
No overlapping between R and the input operands is allowed.
For A = B, use mpn_sec_sqr for optimal performance.
This function requires scratch space of mpn_sec_mul_itch(an, bn)
limbs to be passed in the tp parameter. The scratch space requirements are guaranteed to increase monotonously in the operand sizes.
Examples
mp_ptr ap = new mp_ptr(new uint[] { 0xffffffff, 0xffffffff });
mp_ptr bp = new mp_ptr(new uint[] { 0x00000002 });
mp_ptr result = new mp_ptr(new uint[] { 0xfffffffe, 0xffffffff, 0x00000001 });
mp_ptr rp = new mp_ptr(ap.Size + bp.Size);
mp_size_t size = gmp_lib.mpn_sec_mul_itch(ap.Size, bp.Size);
mp_ptr tp = new mp_ptr(size);
gmp_lib.mpn_sec_mul(rp, ap, ap.Size, bp, bp.Size, tp);
Assert.IsTrue(rp.SequenceEqual(result));
gmp_lib.free(rp, ap, bp, tp, result);
Dim ap As New mp_ptr(New UInteger() { &HffffffffUI, &HffffffffUI})
Dim bp As New mp_ptr(New UInteger() { &H2})
Dim result As New mp_ptr(New UInteger() { &HfffffffeUI, &HffffffffUI, &H1})
Dim rp As New mp_ptr(ap.Size + bp.Size)
Dim size As mp_size_t = gmp_lib.mpn_sec_mul_itch(ap.Size, bp.Size)
Dim tp As New mp_ptr(size)
gmp_lib.mpn_sec_mul(rp, ap, ap.Size, bp, bp.Size, tp)
Assert.IsTrue(rp.SequenceEqual(result))
gmp_lib.free(rp, ap, bp, tp, result)
No code example is currently available or this language may not be supported.
No code example is currently available or this language may not be supported.
See Also