[PATCH v6 18/34] Merge Thumb-2 optimizations for 64-bit comparison

This effectively merges support for all architecture variants into a common function path with appropriate build conditions. ARM performance is 1-2 instructions faster; Thumb-2 is about 50% faster. gcc/libgcc/ChangeLog: 2021-01-13 Daniel Engel * config/arm/bpabi.S (__aeabi_lcmp

[PATCH v6 19/34] Import 32-bit division from the CM0 library

gcc/libgcc/ChangeLog: 2021-01-07 Daniel Engel * config/arm/eabi/idiv.S: New file for __udivsi3() and __divsi3(). * config/arm/lib1funcs.S: #include eabi/idiv.S (v6m only). --- libgcc/config/arm/eabi/idiv.S | 299 ++ libgcc/config/arm/lib1funcs.S

[PATCH v6 20/34] Refactor Thumb-1 64-bit division into a new file

gcc/libgcc/ChangeLog: 2021-01-13 Daniel Engel * config/arm/bpabi-v6m.S (__aeabi_ldivmod/ldivmod): Moved to ... * config/arm/eabi/ldiv.S: New file. * config/arm/lib1funcs.S: #include eabi/ldiv.S (v6m only). --- libgcc/config/arm/bpabi-v6m.S | 81

[PATCH v6 21/34] Import 64-bit division from the CM0 library

gcc/libgcc/ChangeLog: 2021-01-13 Daniel Engel * config/arm/bpabi.c: Deleted unused file. * config/arm/eabi/ldiv.S (__aeabi_ldivmod, __aeabi_uldivmod): Replaced wrapper functions with a complete implementation. * config/arm/t-bpabi (LIB2ADD_ST): Removed bpabi.c

[PATCH v6 22/34] Import integer multiplication from the CM0 library

gcc/libgcc/ChangeLog: 2021-01-07 Daniel Engel * config/arm/eabi/lmul.S: New file for __muldi3(), __mulsidi3(), and __umulsidi3(). * config/arm/lib1funcs.S: #eabi/lmul.S (v6m only). * config/arm/t-elf: Add the new objects to LIB1ASMFUNCS. --- libgcc/config/arm

[PATCH v6 23/34] Refactor Thumb-1 float comparison into a new file

gcc/libgcc/ChangeLog: 2021-01-13 Daniel Engel * config/arm/bpabi-v6m.S (__aeabi_cfcmpeq, __aeabi_cfcmple, __aeabi_cfrcmple, __aeabi_fcmpeq, __aeabi_fcmple, aeabi_fcmple, __aeabi_fcmpgt, aeabi_fcmpge): Moved to ... * config/arm/eabi/fcmp.S: New file

[PATCH v6 24/34] Import float comparison from the CM0 library

OTE: It seems that the __aeabi_cfcmp*() routines formerly in bpabi-v6m.S were not well tested, as they returned wrong results for the 'C' flag. The replacement functions are fully tested. gcc/libgcc/ChangeLog: 2021-01-13 Daniel Engel * config/arm/eabi/fcmp.S (__c

[PATCH v6 25/34] Refactor Thumb-1 float subtraction into a new file

This will make it easier to isolate changes in subsequent patches. gcc/libgcc/ChangeLog: 2021-01-13 Daniel Engel * config/arm/bpabi-v6m.S (__aeabi_frsub): Moved to ... * config/arm/eabi/fadd.S: New file. * config/arm/lib1funcs.S: #include eabi/fadd.S (v6m only

[PATCH v6 26/34] Import float addition and subtraction from the CM0 library

size is still less than half the size of soft-float. gcc/libgcc/ChangeLog: 2021-01-13 Daniel Engel * config/arm/eabi/fadd.S (__addsf3, __subsf3): Added new functions. * config/arm/eabi/fneg.S (__negsf2): Added new file. * config/arm/eabi/futil.S (__fp_normalize2

[PATCH v6 27/34] Import float multiplication from the CM0 library

gcc/libgcc/ChangeLog: 2021-01-13 Daniel Engel * config/arm/eabi/fmul.S (__mulsf3): New file. * config/arm/lib1funcs.S: #include eabi/fmul.S (v6m only). * config/arm/t-elf (LIB1ASMFUNCS): Moved _mulsf3 to global scope (this object was previously blocked on v6m

[PATCH v6 28/34] Import float division from the CM0 library

gcc/libgcc/ChangeLog: 2021-01-08 Daniel Engel * config/arm/eabi/fdiv.S (__divsf3, __fp_divloopf): New file. * config/arm/lib1funcs.S: #include eabi/fdiv.S (v6m only). * config/arm/t-elf (LIB1ASMFUNCS): Added _divsf3 and _fp_divloopf. --- libgcc/config/arm/eabi/fdiv.S

[PATCH v6 29/34] Import integer-to-float conversion from the CM0 library

gcc/libgcc/ChangeLog: 2021-01-13 Daniel Engel * config/arm/bpabi-lib.h (__floatdisf, __floatundisf): Remove obsolete RENAME_LIBRARY directives. * config/arm/eabi/ffloat.S (__aeabi_i2f, __aeabi_l2f, __aeabi_ui2f, __aeabi_ul2f): New file. * config/arm

[PATCH v6 30/34] Import float-to-integer conversion from the CM0 library

gcc/libgcc/ChangeLog: 2021-01-13 Daniel Engel * config/arm/bpabi-lib.h (muldi3): Removed duplicate. (fixunssfsi) Removed obsolete RENAME_LIBRARY directive. * config/arm/eabi/ffixed.S (__aeabi_f2iz, __aeabi_f2uiz, __aeabi_f2lz, __aeabi_f2ulz): New file

[PATCH v6 31/34] Import float<->double conversion from the CM0 library

gcc/libgcc/ChangeLog: 2021-01-13 Daniel Engel * config/arm/eabi/fcast.S (__aeabi_d2f, __aeabi_f2d): New file. * config/arm/lib1funcs.S: #include eabi/fcast.S (v6m only). * config/arm/t-elf (LIB1ASMFUNCS): Added _arm_d2f and _arm_f2d. --- libgcc/config/arm/eabi/fcast.S

[PATCH v6 32/34] Import float<->__fp16 conversion from the CM0 library

gcc/libgcc/ChangeLog: 2021-01-13 Daniel Engel * config/arm/eabi/fcast.S (__aeabi_h2f, __aeabi_f2h): Added functions. * config/arm/fp16 (__gnu_f2h_ieee, __gnu_h2f_ieee, __gnu_f2h_alternative, __gnu_h2f_alternative): Disable build for v6m multilibs. * config/arm/t

[PATCH v6 33/34] Drop single-precision Thumb-1 soft-float functions

ir code path, so this choice leads to a size reduction in programs that use both functions.) gcc/libgcc/ChangeLog: 2021-01-13 Daniel Engel * config/arm/t-softfp (softfp_float_modes): Added as "df". --- libgcc/config/arm/t-softfp | 2 ++ 1 file changed, 2 insertions(+) d

[PATCH v6 34/34] Add -mpure-code support to the CM0 functions.

gcc/libgcc/ChangeLog: 2021-01-16 Daniel Engel Makefile.in (MPURE_CODE): New macro defines __PURE_CODE__. (gcc_compile): Appended MPURE_CODE. lib1funcs.S (FUNC_START_SECTION): Set flags for __PURE_CODE__. clz2.S (__clzsi2): Added -mpure-code compatible instructions

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