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58 lines
2.0 KiB
58 lines
2.0 KiB
From 2c8b9d5807a515a0ff859899065f512beabcbaed Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?=C5=A0imon=20Bo=C5=99ek?= <simon.borek@nic.cz>
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Date: Sat, 16 Jul 2022 18:39:55 +0200
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Subject: [PATCH] PPC/e500 with SPE enabled: use soft float instead of failing
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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This allows building LuaJit for systems with Power ISA SPE
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extension[^1] support by using soft float on LuaJit side.
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While e500 CPU cores support SPE instruction set extension
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allowing them to perform floating point arithmetic natively,
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this isn't required. They can function with software floating
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point to integer arithmetic translation as well,
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just like FPU-less PowerPC CPUs without SPE support.
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Therefore I see no need to prevent them from running LuaJit
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explicitly.
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[^1]: https://www.nxp.com/docs/en/reference-manual/SPEPEM.pdf
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Signed-off-by: Pali Rohár <pali@kernel.org>
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Signed-off-by: Šimon Bořek <simon.borek@nic.cz>
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---
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src/lj_arch.h | 7 ++-----
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1 file changed, 2 insertions(+), 5 deletions(-)
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--- a/src/lj_arch.h
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+++ b/src/lj_arch.h
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@@ -256,7 +256,7 @@
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#define LJ_ARCH_NAME "ppc"
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#if !defined(LJ_ARCH_HASFPU)
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-#if defined(_SOFT_FLOAT) || defined(_SOFT_DOUBLE)
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+#if defined(_SOFT_FLOAT) || defined(_SOFT_DOUBLE) || defined(__NO_FPRS__)
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#define LJ_ARCH_HASFPU 0
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#else
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#define LJ_ARCH_HASFPU 1
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@@ -264,7 +264,7 @@
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#endif
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#if !defined(LJ_ABI_SOFTFP)
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-#if defined(_SOFT_FLOAT) || defined(_SOFT_DOUBLE)
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+#if defined(_SOFT_FLOAT) || defined(_SOFT_DOUBLE) || defined(__NO_FPRS__)
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#define LJ_ABI_SOFTFP 1
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#else
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#define LJ_ABI_SOFTFP 0
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@@ -442,9 +442,6 @@
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#if LJ_ARCH_PPC64
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#error "No support for PowerPC 64 bit mode (yet)"
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#endif
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-#if defined(__NO_FPRS__) && !defined(_SOFT_FLOAT)
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-#error "No support for PPC/e500 anymore (use LuaJIT 2.0)"
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-#endif
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#elif LJ_TARGET_MIPS32
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#if !((defined(_MIPS_SIM_ABI32) && _MIPS_SIM == _MIPS_SIM_ABI32) || (defined(_ABIO32) && _MIPS_SIM == _ABIO32))
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#error "Only o32 ABI supported for MIPS32"
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