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@ -15,44 +15,71 @@ extern "C" {
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# define CLOCK_DELAY_NOP8 "nop\n\t nop\n\t nop\n\t nop\n\t nop\n\t nop\n\t nop\n\t nop\n\t"
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__attribute__((always_inline))
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static inline void wait_cpuclock_allnop(unsigned int n) { /* n: 1..135 */
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__attribute__((always_inline)) static inline void wait_cpuclock_allnop(unsigned int n) { /* n: 1..135 */
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/* The argument n must be a constant expression.
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* That way, compiler optimization will remove unnecessary code. */
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if (n < 1) { return; }
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if (n < 1) {
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return;
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}
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if (n > 8) {
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unsigned int n8 = n / 8;
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n = n - n8 * 8;
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switch (n8) {
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case 16: asm volatile (CLOCK_DELAY_NOP8::: "memory");
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case 15: asm volatile (CLOCK_DELAY_NOP8::: "memory");
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case 14: asm volatile (CLOCK_DELAY_NOP8::: "memory");
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case 13: asm volatile (CLOCK_DELAY_NOP8::: "memory");
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case 12: asm volatile (CLOCK_DELAY_NOP8::: "memory");
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case 11: asm volatile (CLOCK_DELAY_NOP8::: "memory");
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case 10: asm volatile (CLOCK_DELAY_NOP8::: "memory");
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case 9: asm volatile (CLOCK_DELAY_NOP8::: "memory");
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case 8: asm volatile (CLOCK_DELAY_NOP8::: "memory");
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case 7: asm volatile (CLOCK_DELAY_NOP8::: "memory");
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case 6: asm volatile (CLOCK_DELAY_NOP8::: "memory");
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case 5: asm volatile (CLOCK_DELAY_NOP8::: "memory");
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case 4: asm volatile (CLOCK_DELAY_NOP8::: "memory");
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case 3: asm volatile (CLOCK_DELAY_NOP8::: "memory");
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case 2: asm volatile (CLOCK_DELAY_NOP8::: "memory");
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case 1: asm volatile (CLOCK_DELAY_NOP8::: "memory");
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case 0: break;
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case 16:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 15:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 14:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 13:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 12:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 11:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 10:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 9:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 8:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 7:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 6:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 5:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 4:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 3:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 2:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 1:
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asm volatile(CLOCK_DELAY_NOP8::: "memory");
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case 0:
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break;
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}
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}
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switch (n) {
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case 8: asm volatile ("nop"::: "memory");
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case 7: asm volatile ("nop"::: "memory");
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case 6: asm volatile ("nop"::: "memory");
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case 5: asm volatile ("nop"::: "memory");
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case 4: asm volatile ("nop"::: "memory");
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case 3: asm volatile ("nop"::: "memory");
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case 2: asm volatile ("nop"::: "memory");
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case 1: asm volatile ("nop"::: "memory");
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case 0: break;
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case 8:
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asm volatile("nop" ::: "memory");
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case 7:
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asm volatile("nop" ::: "memory");
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case 6:
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asm volatile("nop" ::: "memory");
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case 5:
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asm volatile("nop" ::: "memory");
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case 4:
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asm volatile("nop" ::: "memory");
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case 3:
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asm volatile("nop" ::: "memory");
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case 2:
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asm volatile("nop" ::: "memory");
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case 1:
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asm volatile("nop" ::: "memory");
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case 0:
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break;
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}
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}
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#endif
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