math: improve POSIX compliance #1295

Job	Run time
call-ci / build (armv7a7-imx6ull-evk)	1m 17s
call-ci / build (armv7a9-zynq7000-qemu)	1m 26s
call-ci / build (armv7a9-zynq7000-zedboard)	1m 11s
call-ci / build (armv7a9-zynq7000-zturn)	1m 11s
call-ci / build (armv7m4-stm32l4x6-nucleo)	1m 5s
call-ci / build (armv7m7-imxrt105x-evk)	1m 12s
call-ci / build (armv7m7-imxrt106x-evk)	1m 14s
call-ci / build (armv7m7-imxrt117x-evk)	1m 14s
call-ci / build (armv8r52-mps3an536-qemu)	1m 15s
call-ci / build (armv8m33-mcxn94x-frdm)	1m 6s
call-ci / build (host-generic-pc)	1m 3s
call-ci / build (ia32-generic-pc)	1m 10s
call-ci / build (ia32-generic-qemu)	1m 10s
call-ci / build (riscv64-generic-qemu)	1m 10s
call-ci / build (riscv64-generic-spike)	1m 2s
call-ci / build (sparcv8leon-generic-qemu)	1m 7s
call-ci / build (sparcv8leon-gr712rc-board)	54s
call-ci / build (sparcv8leon-gr716-mimas)	1m 2s
call-ci / build (sparcv8leon-gr716-mini)	1m 5s
call-ci / test HW (armv7a7-imx6ull-evk)	55s
call-ci / test EMU (armv7a9-zynq7000-qemu)	10s
call-ci / test HW (armv7m7-imxrt106x-evk)	41s
call-ci / test EMU (host-generic-pc)	15s
call-ci / test HW (armv7m7-imxrt117x-evk)	26s
call-ci / test HW (armv7a9-zynq7000-zedboard)	37s
call-ci / test HW (armv7m4-stm32l4x6-nucleo)	27s
call-ci / test EMU (ia32-generic-qemu)	21s
call-ci / test EMU (riscv64-generic-qemu)	21s
call-ci / test EMU (sparcv8leon-generic-qemu)	21s
call-ci / tests-summary	10s
call-ci / send-notification	0s
	26m 38s

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