Add `__divtf3` #1300

Job	Run time
Rustfmt	11s
Test (aarch64-apple-darwin, macos-14, nightly)	36s
Test (aarch64-unknown-linux-gnu, ubuntu-latest, nightly)	1m 9s
Test (aarch64-pc-windows-msvc, windows-latest, nightly, 1, 1)	1m 1s
Test (arm-unknown-linux-gnueabi, ubuntu-latest, nightly)	1m 24s
Test (arm-unknown-linux-gnueabihf, ubuntu-latest, nightly)	1m 9s
Clippy	19s
Test (i586-unknown-linux-gnu, ubuntu-latest, nightly)	43s
Test (i686-unknown-linux-gnu, ubuntu-latest, nightly)	58s
Test (powerpc-unknown-linux-gnu, ubuntu-latest, nightly)	55s
Test (powerpc64-unknown-linux-gnu, ubuntu-latest, nightly)	1m 2s
Test (powerpc64le-unknown-linux-gnu, ubuntu-latest, nightly)	1m 3s
Test (thumbv6m-none-eabi, ubuntu-latest, nightly)	1m 4s
Test (thumbv7em-none-eabi, ubuntu-latest, nightly)	57s
Test (thumbv7em-none-eabihf, ubuntu-latest, nightly)	1m 1s
Test (thumbv7m-none-eabi, ubuntu-latest, nightly)	55s
Test (wasm32-unknown-unknown, ubuntu-latest, nightly)	1m 6s
Test (x86_64-unknown-linux-gnu, ubuntu-latest, nightly)	41s
Test (x86_64-apple-darwin, macos-latest, nightly)	35s
Test (i686-pc-windows-msvc, windows-latest, nightly, 1)	1m 2s
Test (x86_64-pc-windows-msvc, windows-latest, nightly, 1)	55s
Test (i686-pc-windows-gnu, windows-latest, nightly-i686-gnu)	1m 8s
Test (x86_64-pc-windows-gnu, windows-latest, nightly-x86_64-gnu)	1m 10s
success	1s
	21m 5s

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