On Mon, Jan 11, 2021, at 7:39 AM, Richard Earnshaw wrote:
> On 11/01/2021 15:26, Richard Earnshaw wrote:
> > On 11/01/2021 11:10, [email protected] wrote:
> >> From: Daniel Engel <[email protected]>
> >>
> >> gcc/libgcc/ChangeLog:
> >> 2021-01-07 Daniel Engel <[email protected]>
> >>
> >> * config/arm/lib1funcs.S: Move __clzsi2() and __clzdi2() to
> >> * config/arm/bits/clz2.S: New file.
> >
> > No, please don't push these down into a subdirectory. They do not
> > represent a clear subfunctional distinction, so creating a load of disk
> > hierarcy is just confusing. Just put the code in config/arm/clz.S
> >
> > Otherwise this is just a re-org, so it's OK.
>
> Oops, missed that as a new file, this needs to copy over the original
> copyright message.
>
> Same with the other re-orgs that split code up.
This is not a hard change, just noisy, so I'm checking ... the estimated
lifetime of this particular content is approximately 15 minutes. There
is a copyright message in 05/29, and similar for the other re-orgs.
> R.
>
> >
> > R.
> >
> >> ---
> >> libgcc/config/arm/bits/clz2.S | 124 ++++++++++++++++++++++++++++++++++
> >> libgcc/config/arm/lib1funcs.S | 123 +--------------------------------
> >> 2 files changed, 125 insertions(+), 122 deletions(-)
> >> create mode 100644 libgcc/config/arm/bits/clz2.S
> >>
> >> diff --git a/libgcc/config/arm/bits/clz2.S b/libgcc/config/arm/bits/clz2.S
> >> new file mode 100644
> >> index 00000000000..1c8f10a5b29
> >> --- /dev/null
> >> +++ b/libgcc/config/arm/bits/clz2.S
> >> @@ -0,0 +1,124 @@
> >> +
> >> +#ifdef L_clzsi2
> >> +#ifdef NOT_ISA_TARGET_32BIT
> >> +FUNC_START clzsi2
> >> + movs r1, #28
> >> + movs r3, #1
> >> + lsls r3, r3, #16
> >> + cmp r0, r3 /* 0x10000 */
> >> + bcc 2f
> >> + lsrs r0, r0, #16
> >> + subs r1, r1, #16
> >> +2: lsrs r3, r3, #8
> >> + cmp r0, r3 /* #0x100 */
> >> + bcc 2f
> >> + lsrs r0, r0, #8
> >> + subs r1, r1, #8
> >> +2: lsrs r3, r3, #4
> >> + cmp r0, r3 /* #0x10 */
> >> + bcc 2f
> >> + lsrs r0, r0, #4
> >> + subs r1, r1, #4
> >> +2: adr r2, 1f
> >> + ldrb r0, [r2, r0]
> >> + adds r0, r0, r1
> >> + bx lr
> >> +.align 2
> >> +1:
> >> +.byte 4, 3, 2, 2, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0
> >> + FUNC_END clzsi2
> >> +#else
> >> +ARM_FUNC_START clzsi2
> >> +# if defined (__ARM_FEATURE_CLZ)
> >> + clz r0, r0
> >> + RET
> >> +# else
> >> + mov r1, #28
> >> + cmp r0, #0x10000
> >> + do_it cs, t
> >> + movcs r0, r0, lsr #16
> >> + subcs r1, r1, #16
> >> + cmp r0, #0x100
> >> + do_it cs, t
> >> + movcs r0, r0, lsr #8
> >> + subcs r1, r1, #8
> >> + cmp r0, #0x10
> >> + do_it cs, t
> >> + movcs r0, r0, lsr #4
> >> + subcs r1, r1, #4
> >> + adr r2, 1f
> >> + ldrb r0, [r2, r0]
> >> + add r0, r0, r1
> >> + RET
> >> +.align 2
> >> +1:
> >> +.byte 4, 3, 2, 2, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0
> >> +# endif /* !defined (__ARM_FEATURE_CLZ) */
> >> + FUNC_END clzsi2
> >> +#endif
> >> +#endif /* L_clzsi2 */
> >> +
> >> +#ifdef L_clzdi2
> >> +#if !defined (__ARM_FEATURE_CLZ)
> >> +
> >> +# ifdef NOT_ISA_TARGET_32BIT
> >> +FUNC_START clzdi2
> >> + push {r4, lr}
> >> + cmp xxh, #0
> >> + bne 1f
> >> +# ifdef __ARMEB__
> >> + movs r0, xxl
> >> + bl __clzsi2
> >> + adds r0, r0, #32
> >> + b 2f
> >> +1:
> >> + bl __clzsi2
> >> +# else
> >> + bl __clzsi2
> >> + adds r0, r0, #32
> >> + b 2f
> >> +1:
> >> + movs r0, xxh
> >> + bl __clzsi2
> >> +# endif
> >> +2:
> >> + pop {r4, pc}
> >> +# else /* NOT_ISA_TARGET_32BIT */
> >> +ARM_FUNC_START clzdi2
> >> + do_push {r4, lr}
> >> + cmp xxh, #0
> >> + bne 1f
> >> +# ifdef __ARMEB__
> >> + mov r0, xxl
> >> + bl __clzsi2
> >> + add r0, r0, #32
> >> + b 2f
> >> +1:
> >> + bl __clzsi2
> >> +# else
> >> + bl __clzsi2
> >> + add r0, r0, #32
> >> + b 2f
> >> +1:
> >> + mov r0, xxh
> >> + bl __clzsi2
> >> +# endif
> >> +2:
> >> + RETLDM r4
> >> + FUNC_END clzdi2
> >> +# endif /* NOT_ISA_TARGET_32BIT */
> >> +
> >> +#else /* defined (__ARM_FEATURE_CLZ) */
> >> +
> >> +ARM_FUNC_START clzdi2
> >> + cmp xxh, #0
> >> + do_it eq, et
> >> + clzeq r0, xxl
> >> + clzne r0, xxh
> >> + addeq r0, r0, #32
> >> + RET
> >> + FUNC_END clzdi2
> >> +
> >> +#endif
> >> +#endif /* L_clzdi2 */
> >> +
> >> diff --git a/libgcc/config/arm/lib1funcs.S b/libgcc/config/arm/lib1funcs.S
> >> index b4541bae791..f5aa5505e9d 100644
> >> --- a/libgcc/config/arm/lib1funcs.S
> >> +++ b/libgcc/config/arm/lib1funcs.S
> >> @@ -1722,128 +1722,7 @@ LSYM(Lover12):
> >>
> >> #endif /* __symbian__ */
> >>
> >> -#ifdef L_clzsi2
> >> -#ifdef NOT_ISA_TARGET_32BIT
> >> -FUNC_START clzsi2
> >> - movs r1, #28
> >> - movs r3, #1
> >> - lsls r3, r3, #16
> >> - cmp r0, r3 /* 0x10000 */
> >> - bcc 2f
> >> - lsrs r0, r0, #16
> >> - subs r1, r1, #16
> >> -2: lsrs r3, r3, #8
> >> - cmp r0, r3 /* #0x100 */
> >> - bcc 2f
> >> - lsrs r0, r0, #8
> >> - subs r1, r1, #8
> >> -2: lsrs r3, r3, #4
> >> - cmp r0, r3 /* #0x10 */
> >> - bcc 2f
> >> - lsrs r0, r0, #4
> >> - subs r1, r1, #4
> >> -2: adr r2, 1f
> >> - ldrb r0, [r2, r0]
> >> - adds r0, r0, r1
> >> - bx lr
> >> -.align 2
> >> -1:
> >> -.byte 4, 3, 2, 2, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0
> >> - FUNC_END clzsi2
> >> -#else
> >> -ARM_FUNC_START clzsi2
> >> -# if defined (__ARM_FEATURE_CLZ)
> >> - clz r0, r0
> >> - RET
> >> -# else
> >> - mov r1, #28
> >> - cmp r0, #0x10000
> >> - do_it cs, t
> >> - movcs r0, r0, lsr #16
> >> - subcs r1, r1, #16
> >> - cmp r0, #0x100
> >> - do_it cs, t
> >> - movcs r0, r0, lsr #8
> >> - subcs r1, r1, #8
> >> - cmp r0, #0x10
> >> - do_it cs, t
> >> - movcs r0, r0, lsr #4
> >> - subcs r1, r1, #4
> >> - adr r2, 1f
> >> - ldrb r0, [r2, r0]
> >> - add r0, r0, r1
> >> - RET
> >> -.align 2
> >> -1:
> >> -.byte 4, 3, 2, 2, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0
> >> -# endif /* !defined (__ARM_FEATURE_CLZ) */
> >> - FUNC_END clzsi2
> >> -#endif
> >> -#endif /* L_clzsi2 */
> >> -
> >> -#ifdef L_clzdi2
> >> -#if !defined (__ARM_FEATURE_CLZ)
> >> -
> >> -# ifdef NOT_ISA_TARGET_32BIT
> >> -FUNC_START clzdi2
> >> - push {r4, lr}
> >> - cmp xxh, #0
> >> - bne 1f
> >> -# ifdef __ARMEB__
> >> - movs r0, xxl
> >> - bl __clzsi2
> >> - adds r0, r0, #32
> >> - b 2f
> >> -1:
> >> - bl __clzsi2
> >> -# else
> >> - bl __clzsi2
> >> - adds r0, r0, #32
> >> - b 2f
> >> -1:
> >> - movs r0, xxh
> >> - bl __clzsi2
> >> -# endif
> >> -2:
> >> - pop {r4, pc}
> >> -# else /* NOT_ISA_TARGET_32BIT */
> >> -ARM_FUNC_START clzdi2
> >> - do_push {r4, lr}
> >> - cmp xxh, #0
> >> - bne 1f
> >> -# ifdef __ARMEB__
> >> - mov r0, xxl
> >> - bl __clzsi2
> >> - add r0, r0, #32
> >> - b 2f
> >> -1:
> >> - bl __clzsi2
> >> -# else
> >> - bl __clzsi2
> >> - add r0, r0, #32
> >> - b 2f
> >> -1:
> >> - mov r0, xxh
> >> - bl __clzsi2
> >> -# endif
> >> -2:
> >> - RETLDM r4
> >> - FUNC_END clzdi2
> >> -# endif /* NOT_ISA_TARGET_32BIT */
> >> -
> >> -#else /* defined (__ARM_FEATURE_CLZ) */
> >> -
> >> -ARM_FUNC_START clzdi2
> >> - cmp xxh, #0
> >> - do_it eq, et
> >> - clzeq r0, xxl
> >> - clzne r0, xxh
> >> - addeq r0, r0, #32
> >> - RET
> >> - FUNC_END clzdi2
> >> -
> >> -#endif
> >> -#endif /* L_clzdi2 */
> >> +#include "bits/clz2.S"
> >>
> >> #ifdef L_ctzsi2
> >> #ifdef NOT_ISA_TARGET_32BIT
> >>
> >
>
>
