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view make/linux/platform_amd64.suncc @ 219:ab65a4c9b2e8
6708714: Optimize long LShift on 32-bits x86
Summary: For small (1-3 bits) left long shifts in 32-bits VM use sets of add+addc instructions instead of shld+shl on new AMD cpus.
Reviewed-by: never
Contributed-by: shrinivas.joshi@amd.com
author | kvn |
---|---|
date | Mon, 23 Jun 2008 14:11:12 -0700 |
parents | a294fd0c4b38 |
children |
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os_family = linux arch = x86 arch_model = x86_64 os_arch = linux_x86 os_arch_model = linux_x86_64 lib_arch = amd64 compiler = sparcWorks gnu_dis_arch = amd64 sysdefs = -DLINUX -DSPARC_WORKS -D_GNU_SOURCE -DAMD64