remove expensive div in HWFIFO_ADDR_NEXT_N()

[hathach]

No description provided.

[Copilot]

Pull request overview

This PR replaces an expensive runtime division in the HWFIFO_ADDR_NEXT_N() macro usage with a compile-time constant multiplication, improving performance for hardware FIFO address calculations. It also includes minor formatting fixes.

Changes:

• Introduces HWFIFO_ADDR_DATA_RATIO compile-time constant to replace (lin_even / data_stride) * ADDR_STRIDE with lin_even * RATIO, eliminating a division on embedded targets
• Fixes preprocessor directive indentation in tu_hwfifo_read() to match the surrounding convention used in tu_hwfifo_write()
• Minor comment grammar improvements ("a odd" → "an odd", "to linear" → "to the linear")

---

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[github-actions]

TinyUSB Average Code Size Metrics

File	.text	.rodata	.data	.bss	size	%
cdc_host.c	6610	487	15	1539	8371	5.1%
ehci.c	2763	0	0	6043	7597	4.7%
ncm_device.c	1514	28	1408	5830	7358	4.5%
usbh.c	4653	55	99	960	5734	3.5%
hcd_dwc2.c	4994	33	1	513	5540	3.4%
midi_host.c	1353	7	7	3740	5097	3.1%
video_device.c	4394	5	1852	472	4859	3.0%
audio_device.c	2850	0	1248	1673	4518	2.8%
dcd_dwc2.c	4176	25	0	265	4465	2.7%
ohci.c	1942	0	0	2414	4356	2.7%
dcd_ch32_usbfs.c	1473	0	0	2444	3917	2.4%
hcd_stm32_fsdev.c	3287	0	1	420	3708	2.3%
usbd.c	3215	57	89	275	3555	2.2%
ecm_rndis_device.c	1037	0	1	2272	3310	2.0%
dcd_khci.c	1953	0	0	1290	3243	2.0%
hcd_musb.c	3073	0	0	157	3230	2.0%
dcd_ci_fs.c	1925	0	0	1290	3215	2.0%
dcd_da146xx.c	3067	0	0	144	3211	2.0%
dcd_nrf5x.c	2918	0	0	292	3210	2.0%
hcd_rusb2.c	2923	0	0	245	3168	1.9%
dcd_rusb2.c	2919	0	0	156	3075	1.9%
msc_device.c	2518	108	2286	538	3056	1.9%
hcd_ch32_usbfs.c	2484	0	0	498	2982	1.8%
hcd_khci.c	2442	0	0	449	2891	1.8%
dcd_stm32_fsdev.c	2557	0	0	291	2848	1.7%
dcd_mm32f327x_otg.c	1478	0	0	1290	2768	1.7%
dcd_musb.c	2445	0	0	160	2605	1.6%
hcd_samd.c	2220	0	0	324	2544	1.6%
dcd_ci_hs.c	1759	0	0	1344	2538	1.6%
dcd_eptri.c	2271	0	0	259	2530	1.6%
usbtmc_device.c	2176	24	69	291	2500	1.5%
hid_host.c	1206	0	0	1250	2456	1.5%
mtp_device.c	1689	22	1449	579	2275	1.4%
dcd_rp2040.c	858	20	604	655	2137	1.3%
dcd_ch32_usbhs.c	1649	0	0	448	2097	1.3%
msc_host.c	1589	0	0	394	1984	1.2%
dcd_msp430x5xx.c	1798	0	0	176	1974	1.2%
cdc_device.c	1306	16	19	642	1947	1.2%
hcd_rp2040.c	976	73	416	384	1849	1.1%
dcd_lpc17_40.c	1474	0	0	648	1798	1.1%
midi_device.c	1129	0	995	589	1716	1.1%
dcd_nuc505.c	0	0	1531	157	1688	1.0%
dcd_lpc_ip3511.c	1463	0	0	264	1639	1.0%
hub.c	1384	8	8	30	1418	0.9%
dcd_samg.c	1320	0	0	72	1392	0.9%
printer_device.c	813	0	694	530	1341	0.8%
dcd_samd.c	1034	0	0	266	1300	0.8%
dcd_nuc121.c	1168	0	0	101	1269	0.8%
hid_device.c	1118	44	997	115	1233	0.8%
dcd_nuc120.c	1094	0	0	78	1172	0.7%
vendor_device.c	624	0	530	464	1087	0.7%
rp2040_usb.c	172	75	717	4	968	0.6%
dfu_device.c	744	28	712	183	926	0.6%
tusb_fifo.c	848	0	480	0	843	0.5%
typec_stm32.c	820	8	2	12	842	0.5%
dwc2_common.c	602	30	0	0	618	0.4%
usbc.c	420	2	20	166	608	0.4%
usbd_control.c	523	0	474	78	600	0.4%
hcd_pio_usb.c	262	0	240	0	502	0.3%
tusb.c	451	0	384	3	453	0.3%
hcd_ci_hs.c	184	0	0	0	184	0.1%
fsdev_common.c	180	0	0	0	180	0.1%
rusb2_common.c	160	0	16	0	176	0.1%
dfu_rt_device.c	156	0	134	0	156	0.1%
TOTAL	114603	1155	17498	46166	162827	100.0%

Input files

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