math.h File Reference

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Functions
static FORCE_INLINE uint16_t	MultiU24X32toH16 (uint32_t longIn1, uint32_t longIn2)
static FORCE_INLINE uint16_t	MultiU16X8toH16 (uint8_t charIn1, uint16_t intIn2)

Function Documentation

MultiU24X32toH16()

static FORCE_INLINE uint16_t MultiU24X32toH16 ( uint32_t  longIn1, uint32_t  longIn2  )

static

Marlin 3D Printer Firmware Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]

Based on Sprinter and grbl. Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/. Optimized math functions for AVR

                                                                                  {
  uint8_t tmp1;
  uint8_t tmp2;
  uint16_t intRes;
  __asm__ __volatile__(
    A("clr %[tmp1]")
    A("mul %A[longIn1], %B[longIn2]")
    A("mov %[tmp2], r1")
    A("mul %B[longIn1], %C[longIn2]")
    A("movw %A[intRes], r0")
    A("mul %C[longIn1], %C[longIn2]")
    A("add %B[intRes], r0")
    A("mul %C[longIn1], %B[longIn2]")
    A("add %A[intRes], r0")
    A("adc %B[intRes], r1")
    A("mul %A[longIn1], %C[longIn2]")
    A("add %[tmp2], r0")
    A("adc %A[intRes], r1")
    A("adc %B[intRes], %[tmp1]")
    A("mul %B[longIn1], %B[longIn2]")
    A("add %[tmp2], r0")
    A("adc %A[intRes], r1")
    A("adc %B[intRes], %[tmp1]")
    A("mul %C[longIn1], %A[longIn2]")
    A("add %[tmp2], r0")
    A("adc %A[intRes], r1")
    A("adc %B[intRes], %[tmp1]")
    A("mul %B[longIn1], %A[longIn2]")
    A("add %[tmp2], r1")
    A("adc %A[intRes], %[tmp1]")
    A("adc %B[intRes], %[tmp1]")
    A("lsr %[tmp2]")
    A("adc %A[intRes], %[tmp1]")
    A("adc %B[intRes], %[tmp1]")
    A("mul %D[longIn2], %A[longIn1]")
    A("add %A[intRes], r0")
    A("adc %B[intRes], r1")
    A("mul %D[longIn2], %B[longIn1]")
    A("add %B[intRes], r0")
    A("clr r1")
      : [intRes] "=&r" (intRes),
        [tmp1] "=&r" (tmp1),
        [tmp2] "=&r" (tmp2)
      : [longIn1] "d" (longIn1),
        [longIn2] "d" (longIn2)
      : "cc"
  );
  return intRes;
}

MultiU16X8toH16()

static FORCE_INLINE uint16_t MultiU16X8toH16 ( uint8_t  charIn1, uint16_t  intIn2  )

static

                                                                               {
  uint8_t tmp;
  uint16_t intRes;
  __asm__ __volatile__ (
    A("clr %[tmp]")
    A("mul %[charIn1], %B[intIn2]")
    A("movw %A[intRes], r0")
    A("mul %[charIn1], %A[intIn2]")
    A("add %A[intRes], r1")
    A("adc %B[intRes], %[tmp]")
    A("lsr r0")
    A("adc %A[intRes], %[tmp]")
    A("adc %B[intRes], %[tmp]")
    A("clr r1")
      : [intRes] "=&r" (intRes),
        [tmp] "=&r" (tmp)
      : [charIn1] "d" (charIn1),
        [intIn2] "d" (intIn2)
      : "cc"
  );
  return intRes;
}