From 95be01d9c0894ffe040eb2104c77032d6aaf617e Mon Sep 17 00:00:00 2001 From: lkcl Date: Wed, 4 May 2022 17:01:11 +0100 Subject: [PATCH] --- openpower/sv/bitmanip.mdwn | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/openpower/sv/bitmanip.mdwn b/openpower/sv/bitmanip.mdwn index e165b9bd7..26f60956d 100644 --- a/openpower/sv/bitmanip.mdwn +++ b/openpower/sv/bitmanip.mdwn @@ -15,10 +15,13 @@ pseudocode: [[openpower/isa/bitmanip]] -this extension amalgamates bitmanipulation primitives from many sources, including RISC-V bitmanip, Packed SIMD, AVX-512 and OpenPOWER VSX. Vectorisation and SIMD are removed: these are straight scalar (element) operations making them suitable for embedded applications. +this extension amalgamates bitmanipulation primitives from many sources, including RISC-V bitmanip, Packed SIMD, AVX-512 and OpenPOWER VSX. +Also included are DSP/Multimedia operations suitable for +Audio/Video. Vectorisation and SIMD are removed: these are straight scalar (element) operations making them suitable for embedded applications. Vectorisation Context is provided by [[openpower/sv]]. -When combined with SV, scalar variants of bitmanip operations found in VSX are added so that VSX may be retired as "legacy" in the far future (10 to 20 years). Also, VSX is hundreds of opcodes, requires 128 bit pathways, and is wholly unsuited to low power or embedded scenarios. +When combined with SV, scalar variants of bitmanip operations found in VSX are added so that the Packed SIMD aspects of VSX may be retired as "legacy" +in the far future (10 to 20 years). Also, VSX is hundreds of opcodes, requires 128 bit pathways, and is wholly unsuited to low power or embedded scenarios. ternlogv is experimental and is the only operation that may be considered a "Packed SIMD". It is added as a variant of the already well-justified ternlog operation (done in AVX512 as an immediate only) "because it looks fun". As it is based on the LUT4 concept it will allow accelerated emulation of FPGAs. Other vendors of ISAs are buying FPGA companies to achieve similar objectives. -- 2.30.2