From 77207192ea296f040c77cb41fd3966fecce813bb Mon Sep 17 00:00:00 2001 From: "Kartik K. Agaram" Date: Mon, 13 Sep 2021 04:53:38 -0700 Subject: . --- linux/x86_approx.md | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) (limited to 'linux') diff --git a/linux/x86_approx.md b/linux/x86_approx.md index 059c5e6b..2835c08e 100644 --- a/linux/x86_approx.md +++ b/linux/x86_approx.md @@ -110,6 +110,8 @@ the fourth decimal place. Among the x86 instructions Mu supports, two are described in the Intel manual as "approximate": `reciprocal` (`rcpss`) and `inverse-square-root` (`rsqrtss`). Intel introduced these instructions as part of its SSE expansion in 1999. When -it upgraded SSE to SSE2 (in 2000), most of its single-precision floating-point -instructions got upgraded to double-precision — but not these two. So -they seem to be an evolutionary dead-end. +it upgraded SSE to SSE2 (in 2000), most of its scalar[1] single-precision +floating-point instructions got upgraded to double-precision — but not +these two. So they seem to be an evolutionary dead-end. + +[1] Thanks boulos for feedback: https://news.ycombinator.com/item?id=28501429#28507118 -- cgit 1.4.1-2-gfad0 abs'> summary refs log tree commit diff stats
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