From: Maciej W. Rozycki <macro@linux-mips.org> Date: Fri, 3 Apr 2015 22:26:44 +0000 (+0100) Subject: MIPS: Correct MIPS I FP context layout X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=80cbfad79096;p=linux.git MIPS: Correct MIPS I FP context layout Implement the correct ordering of individual floating-point registers within double-precision register pairs for the MIPS I FP context, as required by our FP emulation code and expected by userland talking via ptrace(2). Use L.D and S.D assembly macros that do the right thing like LDC1 and SDC1 from MIPS II up, avoiding the need to mess up with endianness conditionals. This in particular fixes the handling of denormals and NaN generation in Unimplemented Operation emulation traps. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/9699/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org> --- diff --git a/arch/mips/include/asm/asmmacro-32.h b/arch/mips/include/asm/asmmacro-32.h index cdac7b3eeaf7f..8deb906df7244 100644 --- a/arch/mips/include/asm/asmmacro-32.h +++ b/arch/mips/include/asm/asmmacro-32.h @@ -16,38 +16,22 @@ .set push SET_HARDFLOAT cfc1 \tmp, fcr31 - swc1 $f0, THREAD_FPR0_LS64(\thread) - swc1 $f1, THREAD_FPR1_LS64(\thread) - swc1 $f2, THREAD_FPR2_LS64(\thread) - swc1 $f3, THREAD_FPR3_LS64(\thread) - swc1 $f4, THREAD_FPR4_LS64(\thread) - swc1 $f5, THREAD_FPR5_LS64(\thread) - swc1 $f6, THREAD_FPR6_LS64(\thread) - swc1 $f7, THREAD_FPR7_LS64(\thread) - swc1 $f8, THREAD_FPR8_LS64(\thread) - swc1 $f9, THREAD_FPR9_LS64(\thread) - swc1 $f10, THREAD_FPR10_LS64(\thread) - swc1 $f11, THREAD_FPR11_LS64(\thread) - swc1 $f12, THREAD_FPR12_LS64(\thread) - swc1 $f13, THREAD_FPR13_LS64(\thread) - swc1 $f14, THREAD_FPR14_LS64(\thread) - swc1 $f15, THREAD_FPR15_LS64(\thread) - swc1 $f16, THREAD_FPR16_LS64(\thread) - swc1 $f17, THREAD_FPR17_LS64(\thread) - swc1 $f18, THREAD_FPR18_LS64(\thread) - swc1 $f19, THREAD_FPR19_LS64(\thread) - swc1 $f20, THREAD_FPR20_LS64(\thread) - swc1 $f21, THREAD_FPR21_LS64(\thread) - swc1 $f22, THREAD_FPR22_LS64(\thread) - swc1 $f23, THREAD_FPR23_LS64(\thread) - swc1 $f24, THREAD_FPR24_LS64(\thread) - swc1 $f25, THREAD_FPR25_LS64(\thread) - swc1 $f26, THREAD_FPR26_LS64(\thread) - swc1 $f27, THREAD_FPR27_LS64(\thread) - swc1 $f28, THREAD_FPR28_LS64(\thread) - swc1 $f29, THREAD_FPR29_LS64(\thread) - swc1 $f30, THREAD_FPR30_LS64(\thread) - swc1 $f31, THREAD_FPR31_LS64(\thread) + s.d $f0, THREAD_FPR0_LS64(\thread) + s.d $f2, THREAD_FPR2_LS64(\thread) + s.d $f4, THREAD_FPR4_LS64(\thread) + s.d $f6, THREAD_FPR6_LS64(\thread) + s.d $f8, THREAD_FPR8_LS64(\thread) + s.d $f10, THREAD_FPR10_LS64(\thread) + s.d $f12, THREAD_FPR12_LS64(\thread) + s.d $f14, THREAD_FPR14_LS64(\thread) + s.d $f16, THREAD_FPR16_LS64(\thread) + s.d $f18, THREAD_FPR18_LS64(\thread) + s.d $f20, THREAD_FPR20_LS64(\thread) + s.d $f22, THREAD_FPR22_LS64(\thread) + s.d $f24, THREAD_FPR24_LS64(\thread) + s.d $f26, THREAD_FPR26_LS64(\thread) + s.d $f28, THREAD_FPR28_LS64(\thread) + s.d $f30, THREAD_FPR30_LS64(\thread) sw \tmp, THREAD_FCR31(\thread) .set pop .endm @@ -56,38 +40,22 @@ .set push SET_HARDFLOAT lw \tmp, THREAD_FCR31(\thread) - lwc1 $f0, THREAD_FPR0_LS64(\thread) - lwc1 $f1, THREAD_FPR1_LS64(\thread) - lwc1 $f2, THREAD_FPR2_LS64(\thread) - lwc1 $f3, THREAD_FPR3_LS64(\thread) - lwc1 $f4, THREAD_FPR4_LS64(\thread) - lwc1 $f5, THREAD_FPR5_LS64(\thread) - lwc1 $f6, THREAD_FPR6_LS64(\thread) - lwc1 $f7, THREAD_FPR7_LS64(\thread) - lwc1 $f8, THREAD_FPR8_LS64(\thread) - lwc1 $f9, THREAD_FPR9_LS64(\thread) - lwc1 $f10, THREAD_FPR10_LS64(\thread) - lwc1 $f11, THREAD_FPR11_LS64(\thread) - lwc1 $f12, THREAD_FPR12_LS64(\thread) - lwc1 $f13, THREAD_FPR13_LS64(\thread) - lwc1 $f14, THREAD_FPR14_LS64(\thread) - lwc1 $f15, THREAD_FPR15_LS64(\thread) - lwc1 $f16, THREAD_FPR16_LS64(\thread) - lwc1 $f17, THREAD_FPR17_LS64(\thread) - lwc1 $f18, THREAD_FPR18_LS64(\thread) - lwc1 $f19, THREAD_FPR19_LS64(\thread) - lwc1 $f20, THREAD_FPR20_LS64(\thread) - lwc1 $f21, THREAD_FPR21_LS64(\thread) - lwc1 $f22, THREAD_FPR22_LS64(\thread) - lwc1 $f23, THREAD_FPR23_LS64(\thread) - lwc1 $f24, THREAD_FPR24_LS64(\thread) - lwc1 $f25, THREAD_FPR25_LS64(\thread) - lwc1 $f26, THREAD_FPR26_LS64(\thread) - lwc1 $f27, THREAD_FPR27_LS64(\thread) - lwc1 $f28, THREAD_FPR28_LS64(\thread) - lwc1 $f29, THREAD_FPR29_LS64(\thread) - lwc1 $f30, THREAD_FPR30_LS64(\thread) - lwc1 $f31, THREAD_FPR31_LS64(\thread) + l.d $f0, THREAD_FPR0_LS64(\thread) + l.d $f2, THREAD_FPR2_LS64(\thread) + l.d $f4, THREAD_FPR4_LS64(\thread) + l.d $f6, THREAD_FPR6_LS64(\thread) + l.d $f8, THREAD_FPR8_LS64(\thread) + l.d $f10, THREAD_FPR10_LS64(\thread) + l.d $f12, THREAD_FPR12_LS64(\thread) + l.d $f14, THREAD_FPR14_LS64(\thread) + l.d $f16, THREAD_FPR16_LS64(\thread) + l.d $f18, THREAD_FPR18_LS64(\thread) + l.d $f20, THREAD_FPR20_LS64(\thread) + l.d $f22, THREAD_FPR22_LS64(\thread) + l.d $f24, THREAD_FPR24_LS64(\thread) + l.d $f26, THREAD_FPR26_LS64(\thread) + l.d $f28, THREAD_FPR28_LS64(\thread) + l.d $f30, THREAD_FPR30_LS64(\thread) ctc1 \tmp, fcr31 .set pop .endm