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/Linux-v4.19/arch/arm/lib/
Dlib1funcs.S40 .macro ARM_DIV_BODY dividend, divisor, result, curbit
44 clz \curbit, \divisor
48 mov \divisor, \divisor, lsl \result
54 @ Initially shift the divisor left 3 bits if possible,
58 tst \divisor, #0xe0000000
59 moveq \divisor, \divisor, lsl #3
63 @ Unless the divisor is very big, shift it up in multiples of
65 @ division loop. Continue shifting until the divisor is
67 1: cmp \divisor, #0x10000000
68 cmplo \divisor, \dividend
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Ddiv64.S53 bls 9f @ divisor is 0 or 1
55 beq 8f @ divisor is power of 2
62 @ Align divisor with upper part of dividend.
63 @ The aligned divisor is stored in yl preserving the original.
105 @ divisor for comparisons, considering the carry-out bit as well.
142 @ divisor at this point since divisor can not be smaller than 3 here.
150 8: @ Division by a power of 2: determine what that divisor order is
/Linux-v4.19/lib/
Ddiv64.c71 s64 div_s64_rem(s64 dividend, s32 divisor, s32 *remainder) in div_s64_rem() argument
76 quotient = div_u64_rem(-dividend, abs(divisor), (u32 *)remainder); in div_s64_rem()
78 if (divisor > 0) in div_s64_rem()
81 quotient = div_u64_rem(dividend, abs(divisor), (u32 *)remainder); in div_s64_rem()
82 if (divisor < 0) in div_s64_rem()
102 u64 div64_u64_rem(u64 dividend, u64 divisor, u64 *remainder) in div64_u64_rem() argument
104 u32 high = divisor >> 32; in div64_u64_rem()
109 quot = div_u64_rem(dividend, divisor, &rem32); in div64_u64_rem()
113 quot = div_u64(dividend >> n, divisor >> n); in div64_u64_rem()
118 *remainder = dividend - quot * divisor; in div64_u64_rem()
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/Linux-v4.19/include/linux/
Dmath64.h24 static inline u64 div_u64_rem(u64 dividend, u32 divisor, u32 *remainder) in div_u64_rem() argument
26 *remainder = dividend % divisor; in div_u64_rem()
27 return dividend / divisor; in div_u64_rem()
38 static inline s64 div_s64_rem(s64 dividend, s32 divisor, s32 *remainder) in div_s64_rem() argument
40 *remainder = dividend % divisor; in div_s64_rem()
41 return dividend / divisor; in div_s64_rem()
52 static inline u64 div64_u64_rem(u64 dividend, u64 divisor, u64 *remainder) in div64_u64_rem() argument
54 *remainder = dividend % divisor; in div64_u64_rem()
55 return dividend / divisor; in div64_u64_rem()
65 static inline u64 div64_u64(u64 dividend, u64 divisor) in div64_u64() argument
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/Linux-v4.19/arch/alpha/lib/
Ddivide.S56 #define divisor $1 macro
104 bis $25,$25,divisor
109 LONGIFY(divisor)
114 beq divisor, 9f /* div by zero */
125 1: cmpult divisor,modulus,compare
126 s8addq divisor,$31,divisor
130 1: cmpult divisor,modulus,compare
131 blt divisor, 2f
132 addq divisor,divisor,divisor
141 cmpule divisor,modulus,compare
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Dev6-divide.S66 #define divisor $1 macro
114 bis $25,$25,divisor # E :
120 LONGIFY(divisor) # E : U L L U
127 beq divisor, 9f /* div by zero */
144 1: cmpult divisor,modulus,compare # E :
145 s8addq divisor,$31,divisor # E :
149 1: cmpult divisor,modulus,compare # E :
152 blt divisor, 2f # U : U L U L
154 addq divisor,divisor,divisor # E :
172 cmpule divisor,modulus,compare # E :
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/Linux-v4.19/drivers/cpufreq/
Dsparc-us2e-cpufreq.c87 unsigned long old_divisor, unsigned long divisor) in frob_mem_refresh() argument
92 refr_count /= (MCTRL0_REFR_CLKS_P_CNT * divisor * 1000000000UL); in frob_mem_refresh()
119 unsigned long old_divisor, unsigned long divisor) in us2e_transition() argument
124 if (old_divisor == 2 && divisor == 1) { in us2e_transition()
127 frob_mem_refresh(0, clock_tick, old_divisor, divisor); in us2e_transition()
128 } else if (old_divisor == 1 && divisor == 2) { in us2e_transition()
129 frob_mem_refresh(1, clock_tick, old_divisor, divisor); in us2e_transition()
132 } else if (old_divisor == 1 && divisor > 2) { in us2e_transition()
136 2, divisor); in us2e_transition()
137 } else if (old_divisor > 2 && divisor == 1) { in us2e_transition()
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/Linux-v4.19/drivers/acpi/acpica/
Dutmath.c257 u32 divisor, u64 *out_quotient, u32 *out_remainder) in acpi_ut_short_divide() argument
267 if (divisor == 0) { in acpi_ut_short_divide()
278 ACPI_DIV_64_BY_32(0, dividend_ovl.part.hi, divisor, in acpi_ut_short_divide()
281 ACPI_DIV_64_BY_32(remainder32, dividend_ovl.part.lo, divisor, in acpi_ut_short_divide()
316 union uint64_overlay divisor; in acpi_ut_divide() local
334 divisor.full = in_divisor; in acpi_ut_divide()
336 if (divisor.part.hi == 0) { in acpi_ut_divide()
347 ACPI_DIV_64_BY_32(0, dividend.part.hi, divisor.part.lo, in acpi_ut_divide()
350 ACPI_DIV_64_BY_32(partial1, dividend.part.lo, divisor.part.lo, in acpi_ut_divide()
361 normalized_divisor = divisor; in acpi_ut_divide()
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/Linux-v4.19/arch/c6x/kernel/
Dc6x_ksyms.c19 extern int __c6xabi_divi(int dividend, int divisor);
22 extern unsigned __c6xabi_divu(unsigned dividend, unsigned divisor);
25 extern int __c6xabi_remi(int dividend, int divisor);
28 extern unsigned __c6xabi_remu(unsigned dividend, unsigned divisor);
31 extern int __c6xabi_divremi(int dividend, int divisor);
34 extern unsigned __c6xabi_divremu(unsigned dividend, unsigned divisor);
/Linux-v4.19/Documentation/devicetree/bindings/clock/ti/
Ddivider.txt8 the register is one less than the actual divisor value. E.g:
10 register value actual divisor value
17 ti,index-starts-at-one - valid divisor values start at 1, not the default
19 register value actual divisor value
24 ti,index-power-of-two - valid divisor values are powers of two. E.g:
25 register value actual divisor value
34 Which will map the resulting values to a divisor table by their index:
35 register value actual divisor value
38 2 <invalid divisor, skipped>
65 - ti,min-div : min divisor for dividing the input clock rate, only
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/Linux-v4.19/arch/mips/cavium-octeon/executive/
Dcvmx-helper-jtag.c50 uint32_t divisor = cvmx_sysinfo_get()->cpu_clock_hz / (25 * 1000000); in cvmx_helper_qlm_jtag_init() local
51 divisor = (divisor - 1) >> 2; in cvmx_helper_qlm_jtag_init()
53 while (divisor) { in cvmx_helper_qlm_jtag_init()
55 divisor = divisor >> 1; in cvmx_helper_qlm_jtag_init()
/Linux-v4.19/arch/h8300/lib/
Dudivsi3.S31 shlr.l er2 ; make divisor < 2^16
35 shlr.l #2,er2 ; make divisor < 2^16
41 shlr.l #2,er2 ; make divisor < 2^16
56 ;; er1 contains divisor
57 ;; er2 contains shifted divisor
64 mulxu.w r0,er2 ; er2 = upper (AQ - 1) * divisor
68 sub.l er2,er3 ; er3 = dividend - (AQ - 1) * divisor
70 cmp.l er1,er3 ; is divisor < remainder?
/Linux-v4.19/sound/soc/codecs/
Dtlv320aic26.c69 int fsref, divisor, wlen, pval, jval, dval, qval; in aic26_hw_params() local
78 case 8000: fsref = 48000; divisor = AIC26_DIV_6; break; in aic26_hw_params()
79 case 11025: fsref = 44100; divisor = AIC26_DIV_4; break; in aic26_hw_params()
80 case 12000: fsref = 48000; divisor = AIC26_DIV_4; break; in aic26_hw_params()
81 case 16000: fsref = 48000; divisor = AIC26_DIV_3; break; in aic26_hw_params()
82 case 22050: fsref = 44100; divisor = AIC26_DIV_2; break; in aic26_hw_params()
83 case 24000: fsref = 48000; divisor = AIC26_DIV_2; break; in aic26_hw_params()
84 case 32000: fsref = 48000; divisor = AIC26_DIV_1_5; break; in aic26_hw_params()
85 case 44100: fsref = 44100; divisor = AIC26_DIV_1; break; in aic26_hw_params()
86 case 48000: fsref = 48000; divisor = AIC26_DIV_1; break; in aic26_hw_params()
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/Linux-v4.19/arch/x86/include/asm/
Ddiv64.h43 static inline u64 div_u64_rem(u64 dividend, u32 divisor, u32 *remainder) in div_u64_rem() argument
53 if (upper >= divisor) { in div_u64_rem()
54 d.v32[1] = upper / divisor; in div_u64_rem()
55 upper %= divisor; in div_u64_rem()
58 "rm" (divisor), "0" (d.v32[0]), "1" (upper)); in div_u64_rem()
/Linux-v4.19/arch/powerpc/lib/
Ddiv64.S26 divwu r7,r5,r4 # if dividend.hi >= divisor,
27 mullw r0,r7,r4 # quotient.hi = dividend.hi / divisor
28 subf. r5,r0,r5 # dividend.hi %= divisor
35 srw r10,r10,r0 # the divisor right the same amount,
45 mulhwu r9,r11,r4 # multiply the estimate by the divisor,
46 subfc r6,r10,r6 # take the product from the divisor,
/Linux-v4.19/drivers/clk/
Dclk-vt8500.c144 u32 divisor; in vt8500_dclk_round_rate() local
149 divisor = *prate / rate; in vt8500_dclk_round_rate()
152 if (rate * divisor < *prate) in vt8500_dclk_round_rate()
153 divisor++; in vt8500_dclk_round_rate()
159 if ((cdev->div_mask == 0x3F) && (divisor > 31)) { in vt8500_dclk_round_rate()
160 divisor = 64 * ((divisor / 64) + 1); in vt8500_dclk_round_rate()
163 return *prate / divisor; in vt8500_dclk_round_rate()
170 u32 divisor; in vt8500_dclk_set_rate() local
176 divisor = parent_rate / rate; in vt8500_dclk_set_rate()
178 if (divisor == cdev->div_mask + 1) in vt8500_dclk_set_rate()
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/Linux-v4.19/arch/x86/kernel/
Dearly_printk.c133 static __init void early_serial_hw_init(unsigned divisor) in early_serial_hw_init() argument
144 serial_out(early_serial_base, DLL, divisor & 0xff); in early_serial_hw_init()
145 serial_out(early_serial_base, DLH, (divisor >> 8) & 0xff); in early_serial_hw_init()
153 unsigned divisor; in early_serial_init() local
187 divisor = 115200 / baud; in early_serial_init()
194 early_serial_hw_init(divisor); in early_serial_init()
221 unsigned divisor; in early_pci_serial_init() local
307 divisor = 115200 / baud; in early_pci_serial_init()
310 early_serial_hw_init(divisor); in early_pci_serial_init()
/Linux-v4.19/drivers/gpu/drm/amd/display/dc/basics/
Dconversion.c40 int32_t divisor = 1 << fractional_bits; in fixed_point_to_int_frac() local
48 if (d <= (uint16_t)(1 << integer_bits) - (1 / (uint16_t)divisor)) in fixed_point_to_int_frac()
52 divisor)); in fixed_point_to_int_frac()
60 divisor)))); in fixed_point_to_int_frac()
/Linux-v4.19/drivers/cpuidle/governors/
Dmenu.c202 int i, divisor; in get_typical_interval() local
213 divisor = 0; in get_typical_interval()
218 divisor++; in get_typical_interval()
223 if (divisor == INTERVALS) in get_typical_interval()
226 avg = div_u64(sum, divisor); in get_typical_interval()
237 if (divisor == INTERVALS) in get_typical_interval()
240 do_div(variance, divisor); in get_typical_interval()
255 if ((((u64)avg*avg > variance*36) && (divisor * 4 >= INTERVALS * 3)) in get_typical_interval()
270 if ((divisor * 4) <= INTERVALS * 3) in get_typical_interval()
/Linux-v4.19/drivers/staging/comedi/drivers/
Dcomedi_8254.c341 i8254->divisor = i8254->next_div & 0xffff; in comedi_8254_update_divisors()
441 unsigned int divisor; in comedi_8254_ns_to_timer() local
446 divisor = DIV_ROUND_CLOSEST(*nanosec, i8254->osc_base); in comedi_8254_ns_to_timer()
449 divisor = DIV_ROUND_UP(*nanosec, i8254->osc_base); in comedi_8254_ns_to_timer()
452 divisor = *nanosec / i8254->osc_base; in comedi_8254_ns_to_timer()
455 if (divisor < 2) in comedi_8254_ns_to_timer()
456 divisor = 2; in comedi_8254_ns_to_timer()
457 if (divisor > I8254_MAX_COUNT) in comedi_8254_ns_to_timer()
458 divisor = I8254_MAX_COUNT; in comedi_8254_ns_to_timer()
460 *nanosec = divisor * i8254->osc_base; in comedi_8254_ns_to_timer()
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Dadv_pci1760.c179 unsigned int divisor; in pci1760_pwm_ns_to_div() local
183 divisor = DIV_ROUND_CLOSEST(ns, PCI1760_PWM_TIMEBASE); in pci1760_pwm_ns_to_div()
186 divisor = DIV_ROUND_UP(ns, PCI1760_PWM_TIMEBASE); in pci1760_pwm_ns_to_div()
189 divisor = ns / PCI1760_PWM_TIMEBASE; in pci1760_pwm_ns_to_div()
195 if (divisor < 1) in pci1760_pwm_ns_to_div()
196 divisor = 1; in pci1760_pwm_ns_to_div()
197 if (divisor > 0xffff) in pci1760_pwm_ns_to_div()
198 divisor = 0xffff; in pci1760_pwm_ns_to_div()
200 return divisor; in pci1760_pwm_ns_to_div()
Daddi_apci_3120.c276 unsigned int divisor; in apci3120_ns_to_timer() local
280 divisor = DIV_ROUND_UP(ns, timer_base); in apci3120_ns_to_timer()
283 divisor = ns / timer_base; in apci3120_ns_to_timer()
287 divisor = DIV_ROUND_CLOSEST(ns, timer_base); in apci3120_ns_to_timer()
293 if (divisor > 0x00ffffff) in apci3120_ns_to_timer()
294 divisor = 0x00ffffff; in apci3120_ns_to_timer()
297 if (divisor > 0xffff) in apci3120_ns_to_timer()
298 divisor = 0xffff; in apci3120_ns_to_timer()
301 if (divisor < 2) in apci3120_ns_to_timer()
302 divisor = 2; in apci3120_ns_to_timer()
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/Linux-v4.19/Documentation/devicetree/bindings/clock/
Dvt8500.txt44 - divisor-reg : shall be the register offset from PMC base for the divisor
47 - divisor-mask : shall be the mask for the divisor register. Defaults to 0x1f
70 divisor-reg = <0x328>;
71 divisor-mask = <0x3f>;
/Linux-v4.19/arch/powerpc/boot/
Dvirtex.c32 u16 divisor; in virtex_ns16550_console_init() local
55 divisor = clk / (16 * spd); in virtex_ns16550_console_init()
61 out_8(reg_base + (UART_DLL << reg_shift), divisor & 0xFF); in virtex_ns16550_console_init()
62 out_8(reg_base + (UART_DLM << reg_shift), divisor >> 8); in virtex_ns16550_console_init()
/Linux-v4.19/drivers/usb/serial/
Doti6858.c76 __le16 divisor; /* baud rate = 96000000 / (16 * divisor), LE */ member
114 (((a)->divisor == (priv)->pending_setup.divisor) \
181 __le16 divisor; member
228 new_setup->divisor = priv->pending_setup.divisor; in setup_line()
409 __le16 divisor; in oti6858_set_termios() local
415 divisor = priv->pending_setup.divisor; in oti6858_set_termios()
444 divisor = 0; in oti6858_set_termios()
452 divisor = cpu_to_le16(new_divisor); in oti6858_set_termios()
494 if (divisor != priv->pending_setup.divisor in oti6858_set_termios()
497 priv->pending_setup.divisor = divisor; in oti6858_set_termios()
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