Linaro GCC

vset_lane_u8 inrinsic generates wrong lane number

Bug #784375 reported by Michael Hope on 2011-05-18

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	Linaro GCC	Fix Released	Medium	Ramana Radhakrishnan	Linaro GCC 4.5-2011.05-0

Bug Description

See:
http://lists.linaro.org/pipermail/linaro-toolchain/2011-April/001147.html

The vset_lane_u8() intrinsic generates the wrong lane number in the final assembly.

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Revision history for this message

Michael Hope (michaelh1) wrote on 2011-05-18:

Test case Edit (526 bytes, text/plain)

affects:	gdb-linaro → gcc-linaro
Changed in gcc-linaro:
status:	New → Triaged
importance:	Undecided → Medium
milestone:	none → 4.5-2011.05-0

Revision history for this message

Michael Hope (michaelh1) wrote on 2011-05-18:

Confirmed in gcc-linaro-4.5-2011.04-0:

michaelh@ursa1:~/linaro/bugs$ /tools/toolchains/arch/armv7l/gcc-linaro-4.5-2011.04-0-armv7l-maverick-cbuild112-ursa3-cortexa8r1/bin/gcc -O2 -mfpu=neon -S vset_lane.c

michaelh@ursa1:~/linaro/bugs$ cat vset_lane.s |grep vmov\.8
vmov.8 d19[1], r0
vmov.8 d20[1], r0
vmov.8 d19[1], r0
vmov.8 d20[0], r0

Where the lane numbers should be 3, 2, 1, 0.