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| author | Steve Reinhardt <steve.reinhardt@amd.com> | 2015-10-06 17:26:50 -0700 |
|---|---|---|
| committer | Steve Reinhardt <steve.reinhardt@amd.com> | 2015-10-06 17:26:50 -0700 |
| commit | 57b9f53afa5660152a77b7f3b7affb39f5b0e176 (patch) | |
| tree | a8fe858866fecdd2e1d2703a95f04b0b0b37e9ad /src/arch/x86/isa/microops | |
| parent | 83e07c07f941ab496fa9cfef4807719a16b51066 (diff) | |
| download | gem5-57b9f53afa5660152a77b7f3b7affb39f5b0e176.tar.xz | |
x86: implement fild, fucomi, and fucomip x87 insts
fild loads an integer value into the x87 top of stack register.
fucomi/fucomip compare two x87 register values (the latter
also doing a stack pop).
These instructions are used by some versions of GNU libstdc++.
Diffstat (limited to 'src/arch/x86/isa/microops')
| -rw-r--r-- | src/arch/x86/isa/microops/fpop.isa | 2 | ||||
| -rw-r--r-- | src/arch/x86/isa/microops/ldstop.isa | 19 |
2 files changed, 21 insertions, 0 deletions
diff --git a/src/arch/x86/isa/microops/fpop.isa b/src/arch/x86/isa/microops/fpop.isa index 39162d392..6ba292977 100644 --- a/src/arch/x86/isa/microops/fpop.isa +++ b/src/arch/x86/isa/microops/fpop.isa @@ -1,5 +1,7 @@ // Copyright (c) 2007 The Hewlett-Packard Development Company // Copyright (c) 2012-2013 Mark D. Hill and David A. Wood +// Copyright (c) 2015 Advanced Micro Devices, Inc. +// // All rights reserved. // // The license below extends only to copyright in the software and shall diff --git a/src/arch/x86/isa/microops/ldstop.isa b/src/arch/x86/isa/microops/ldstop.isa index bccec36fe..a7c201f44 100644 --- a/src/arch/x86/isa/microops/ldstop.isa +++ b/src/arch/x86/isa/microops/ldstop.isa @@ -427,6 +427,25 @@ let {{ } ''', big = False) + # Load integer from memory into x87 top-of-stack register. + # Used to implement fild instruction. + defineMicroLoadOp('Ldifp87', code=''' + switch (dataSize) + { + case 2: + FpData_df = (int64_t)sext<16>(Mem); + break; + case 4: + FpData_df = (int64_t)sext<32>(Mem); + break; + case 8: + FpData_df = (int64_t)Mem; + break; + default: + panic("Unhandled data size in LdIFp87.\\n"); + } + ''', big = False) + def defineMicroStoreOp(mnemonic, code, completeCode="", mem_flags="0"): global header_output global decoder_output |