MIPS: Don't assume 64-bit FP registers for context switch
When saving or restoring scalar FP context we want to access the least significant 64 bits of each FP register. When the FP registers are 64 bits wide that is trivially the start of the registers value in memory. However when the FP registers are wider this equivalence will no longer be true for big endian systems. Define a new set of offset macros for the least significant 64 bits of each saved FP register within thread context, and make use of them when saving and restoring scalar FP context. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/6428/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Paul Burton
Ralf Baechle
Родитель
72b22bbad1
Коммит
02987633df
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@ -14,75 +14,75 @@
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.macro fpu_save_single thread tmp=t0
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cfc1 \tmp, fcr31
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swc1 $f0, THREAD_FPR0(\thread)
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swc1 $f1, THREAD_FPR1(\thread)
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swc1 $f2, THREAD_FPR2(\thread)
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swc1 $f3, THREAD_FPR3(\thread)
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swc1 $f4, THREAD_FPR4(\thread)
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swc1 $f5, THREAD_FPR5(\thread)
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swc1 $f6, THREAD_FPR6(\thread)
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swc1 $f7, THREAD_FPR7(\thread)
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swc1 $f8, THREAD_FPR8(\thread)
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swc1 $f9, THREAD_FPR9(\thread)
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swc1 $f10, THREAD_FPR10(\thread)
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swc1 $f11, THREAD_FPR11(\thread)
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swc1 $f12, THREAD_FPR12(\thread)
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swc1 $f13, THREAD_FPR13(\thread)
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swc1 $f14, THREAD_FPR14(\thread)
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swc1 $f15, THREAD_FPR15(\thread)
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swc1 $f16, THREAD_FPR16(\thread)
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swc1 $f17, THREAD_FPR17(\thread)
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swc1 $f18, THREAD_FPR18(\thread)
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swc1 $f19, THREAD_FPR19(\thread)
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swc1 $f20, THREAD_FPR20(\thread)
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swc1 $f21, THREAD_FPR21(\thread)
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swc1 $f22, THREAD_FPR22(\thread)
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swc1 $f23, THREAD_FPR23(\thread)
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swc1 $f24, THREAD_FPR24(\thread)
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swc1 $f25, THREAD_FPR25(\thread)
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swc1 $f26, THREAD_FPR26(\thread)
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swc1 $f27, THREAD_FPR27(\thread)
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swc1 $f28, THREAD_FPR28(\thread)
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swc1 $f29, THREAD_FPR29(\thread)
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swc1 $f30, THREAD_FPR30(\thread)
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swc1 $f31, THREAD_FPR31(\thread)
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swc1 $f0, THREAD_FPR0_LS64(\thread)
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swc1 $f1, THREAD_FPR1_LS64(\thread)
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swc1 $f2, THREAD_FPR2_LS64(\thread)
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swc1 $f3, THREAD_FPR3_LS64(\thread)
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swc1 $f4, THREAD_FPR4_LS64(\thread)
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swc1 $f5, THREAD_FPR5_LS64(\thread)
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swc1 $f6, THREAD_FPR6_LS64(\thread)
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swc1 $f7, THREAD_FPR7_LS64(\thread)
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swc1 $f8, THREAD_FPR8_LS64(\thread)
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swc1 $f9, THREAD_FPR9_LS64(\thread)
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swc1 $f10, THREAD_FPR10_LS64(\thread)
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swc1 $f11, THREAD_FPR11_LS64(\thread)
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swc1 $f12, THREAD_FPR12_LS64(\thread)
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swc1 $f13, THREAD_FPR13_LS64(\thread)
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swc1 $f14, THREAD_FPR14_LS64(\thread)
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swc1 $f15, THREAD_FPR15_LS64(\thread)
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swc1 $f16, THREAD_FPR16_LS64(\thread)
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swc1 $f17, THREAD_FPR17_LS64(\thread)
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swc1 $f18, THREAD_FPR18_LS64(\thread)
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swc1 $f19, THREAD_FPR19_LS64(\thread)
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swc1 $f20, THREAD_FPR20_LS64(\thread)
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swc1 $f21, THREAD_FPR21_LS64(\thread)
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swc1 $f22, THREAD_FPR22_LS64(\thread)
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swc1 $f23, THREAD_FPR23_LS64(\thread)
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swc1 $f24, THREAD_FPR24_LS64(\thread)
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swc1 $f25, THREAD_FPR25_LS64(\thread)
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swc1 $f26, THREAD_FPR26_LS64(\thread)
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swc1 $f27, THREAD_FPR27_LS64(\thread)
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swc1 $f28, THREAD_FPR28_LS64(\thread)
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swc1 $f29, THREAD_FPR29_LS64(\thread)
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swc1 $f30, THREAD_FPR30_LS64(\thread)
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swc1 $f31, THREAD_FPR31_LS64(\thread)
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sw \tmp, THREAD_FCR31(\thread)
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.endm
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.macro fpu_restore_single thread tmp=t0
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lw \tmp, THREAD_FCR31(\thread)
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lwc1 $f0, THREAD_FPR0(\thread)
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lwc1 $f1, THREAD_FPR1(\thread)
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lwc1 $f2, THREAD_FPR2(\thread)
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lwc1 $f3, THREAD_FPR3(\thread)
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lwc1 $f4, THREAD_FPR4(\thread)
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lwc1 $f5, THREAD_FPR5(\thread)
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lwc1 $f6, THREAD_FPR6(\thread)
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lwc1 $f7, THREAD_FPR7(\thread)
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lwc1 $f8, THREAD_FPR8(\thread)
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lwc1 $f9, THREAD_FPR9(\thread)
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lwc1 $f10, THREAD_FPR10(\thread)
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lwc1 $f11, THREAD_FPR11(\thread)
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lwc1 $f12, THREAD_FPR12(\thread)
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lwc1 $f13, THREAD_FPR13(\thread)
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lwc1 $f14, THREAD_FPR14(\thread)
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lwc1 $f15, THREAD_FPR15(\thread)
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lwc1 $f16, THREAD_FPR16(\thread)
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lwc1 $f17, THREAD_FPR17(\thread)
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lwc1 $f18, THREAD_FPR18(\thread)
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lwc1 $f19, THREAD_FPR19(\thread)
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lwc1 $f20, THREAD_FPR20(\thread)
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lwc1 $f21, THREAD_FPR21(\thread)
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lwc1 $f22, THREAD_FPR22(\thread)
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lwc1 $f23, THREAD_FPR23(\thread)
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lwc1 $f24, THREAD_FPR24(\thread)
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lwc1 $f25, THREAD_FPR25(\thread)
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lwc1 $f26, THREAD_FPR26(\thread)
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lwc1 $f27, THREAD_FPR27(\thread)
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lwc1 $f28, THREAD_FPR28(\thread)
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lwc1 $f29, THREAD_FPR29(\thread)
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lwc1 $f30, THREAD_FPR30(\thread)
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lwc1 $f31, THREAD_FPR31(\thread)
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lwc1 $f0, THREAD_FPR0_LS64(\thread)
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lwc1 $f1, THREAD_FPR1_LS64(\thread)
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lwc1 $f2, THREAD_FPR2_LS64(\thread)
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lwc1 $f3, THREAD_FPR3_LS64(\thread)
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lwc1 $f4, THREAD_FPR4_LS64(\thread)
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lwc1 $f5, THREAD_FPR5_LS64(\thread)
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lwc1 $f6, THREAD_FPR6_LS64(\thread)
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lwc1 $f7, THREAD_FPR7_LS64(\thread)
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lwc1 $f8, THREAD_FPR8_LS64(\thread)
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lwc1 $f9, THREAD_FPR9_LS64(\thread)
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lwc1 $f10, THREAD_FPR10_LS64(\thread)
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lwc1 $f11, THREAD_FPR11_LS64(\thread)
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lwc1 $f12, THREAD_FPR12_LS64(\thread)
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lwc1 $f13, THREAD_FPR13_LS64(\thread)
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lwc1 $f14, THREAD_FPR14_LS64(\thread)
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lwc1 $f15, THREAD_FPR15_LS64(\thread)
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lwc1 $f16, THREAD_FPR16_LS64(\thread)
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lwc1 $f17, THREAD_FPR17_LS64(\thread)
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lwc1 $f18, THREAD_FPR18_LS64(\thread)
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lwc1 $f19, THREAD_FPR19_LS64(\thread)
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lwc1 $f20, THREAD_FPR20_LS64(\thread)
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lwc1 $f21, THREAD_FPR21_LS64(\thread)
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lwc1 $f22, THREAD_FPR22_LS64(\thread)
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lwc1 $f23, THREAD_FPR23_LS64(\thread)
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lwc1 $f24, THREAD_FPR24_LS64(\thread)
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lwc1 $f25, THREAD_FPR25_LS64(\thread)
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lwc1 $f26, THREAD_FPR26_LS64(\thread)
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lwc1 $f27, THREAD_FPR27_LS64(\thread)
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lwc1 $f28, THREAD_FPR28_LS64(\thread)
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lwc1 $f29, THREAD_FPR29_LS64(\thread)
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lwc1 $f30, THREAD_FPR30_LS64(\thread)
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lwc1 $f31, THREAD_FPR31_LS64(\thread)
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ctc1 \tmp, fcr31
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.endm
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@ -64,44 +64,44 @@
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.macro fpu_save_16even thread tmp=t0
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cfc1 \tmp, fcr31
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sdc1 $f0, THREAD_FPR0(\thread)
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sdc1 $f2, THREAD_FPR2(\thread)
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sdc1 $f4, THREAD_FPR4(\thread)
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sdc1 $f6, THREAD_FPR6(\thread)
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sdc1 $f8, THREAD_FPR8(\thread)
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sdc1 $f10, THREAD_FPR10(\thread)
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sdc1 $f12, THREAD_FPR12(\thread)
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sdc1 $f14, THREAD_FPR14(\thread)
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sdc1 $f16, THREAD_FPR16(\thread)
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sdc1 $f18, THREAD_FPR18(\thread)
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sdc1 $f20, THREAD_FPR20(\thread)
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sdc1 $f22, THREAD_FPR22(\thread)
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sdc1 $f24, THREAD_FPR24(\thread)
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sdc1 $f26, THREAD_FPR26(\thread)
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sdc1 $f28, THREAD_FPR28(\thread)
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sdc1 $f30, THREAD_FPR30(\thread)
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sdc1 $f0, THREAD_FPR0_LS64(\thread)
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sdc1 $f2, THREAD_FPR2_LS64(\thread)
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sdc1 $f4, THREAD_FPR4_LS64(\thread)
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sdc1 $f6, THREAD_FPR6_LS64(\thread)
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sdc1 $f8, THREAD_FPR8_LS64(\thread)
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sdc1 $f10, THREAD_FPR10_LS64(\thread)
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sdc1 $f12, THREAD_FPR12_LS64(\thread)
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sdc1 $f14, THREAD_FPR14_LS64(\thread)
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sdc1 $f16, THREAD_FPR16_LS64(\thread)
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sdc1 $f18, THREAD_FPR18_LS64(\thread)
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sdc1 $f20, THREAD_FPR20_LS64(\thread)
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sdc1 $f22, THREAD_FPR22_LS64(\thread)
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sdc1 $f24, THREAD_FPR24_LS64(\thread)
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sdc1 $f26, THREAD_FPR26_LS64(\thread)
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sdc1 $f28, THREAD_FPR28_LS64(\thread)
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sdc1 $f30, THREAD_FPR30_LS64(\thread)
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sw \tmp, THREAD_FCR31(\thread)
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.endm
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.macro fpu_save_16odd thread
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.set push
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.set mips64r2
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sdc1 $f1, THREAD_FPR1(\thread)
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sdc1 $f3, THREAD_FPR3(\thread)
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sdc1 $f5, THREAD_FPR5(\thread)
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sdc1 $f7, THREAD_FPR7(\thread)
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sdc1 $f9, THREAD_FPR9(\thread)
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sdc1 $f11, THREAD_FPR11(\thread)
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sdc1 $f13, THREAD_FPR13(\thread)
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sdc1 $f15, THREAD_FPR15(\thread)
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sdc1 $f17, THREAD_FPR17(\thread)
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sdc1 $f19, THREAD_FPR19(\thread)
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sdc1 $f21, THREAD_FPR21(\thread)
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sdc1 $f23, THREAD_FPR23(\thread)
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sdc1 $f25, THREAD_FPR25(\thread)
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sdc1 $f27, THREAD_FPR27(\thread)
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sdc1 $f29, THREAD_FPR29(\thread)
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sdc1 $f31, THREAD_FPR31(\thread)
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sdc1 $f1, THREAD_FPR1_LS64(\thread)
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sdc1 $f3, THREAD_FPR3_LS64(\thread)
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sdc1 $f5, THREAD_FPR5_LS64(\thread)
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sdc1 $f7, THREAD_FPR7_LS64(\thread)
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sdc1 $f9, THREAD_FPR9_LS64(\thread)
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sdc1 $f11, THREAD_FPR11_LS64(\thread)
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sdc1 $f13, THREAD_FPR13_LS64(\thread)
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sdc1 $f15, THREAD_FPR15_LS64(\thread)
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sdc1 $f17, THREAD_FPR17_LS64(\thread)
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sdc1 $f19, THREAD_FPR19_LS64(\thread)
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sdc1 $f21, THREAD_FPR21_LS64(\thread)
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sdc1 $f23, THREAD_FPR23_LS64(\thread)
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sdc1 $f25, THREAD_FPR25_LS64(\thread)
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sdc1 $f27, THREAD_FPR27_LS64(\thread)
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sdc1 $f29, THREAD_FPR29_LS64(\thread)
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sdc1 $f31, THREAD_FPR31_LS64(\thread)
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.set pop
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.endm
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@ -117,44 +117,44 @@
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.macro fpu_restore_16even thread tmp=t0
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lw \tmp, THREAD_FCR31(\thread)
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ldc1 $f0, THREAD_FPR0(\thread)
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ldc1 $f2, THREAD_FPR2(\thread)
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ldc1 $f4, THREAD_FPR4(\thread)
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ldc1 $f6, THREAD_FPR6(\thread)
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ldc1 $f8, THREAD_FPR8(\thread)
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ldc1 $f10, THREAD_FPR10(\thread)
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ldc1 $f12, THREAD_FPR12(\thread)
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ldc1 $f14, THREAD_FPR14(\thread)
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ldc1 $f16, THREAD_FPR16(\thread)
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ldc1 $f18, THREAD_FPR18(\thread)
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ldc1 $f20, THREAD_FPR20(\thread)
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ldc1 $f22, THREAD_FPR22(\thread)
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ldc1 $f24, THREAD_FPR24(\thread)
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ldc1 $f26, THREAD_FPR26(\thread)
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ldc1 $f28, THREAD_FPR28(\thread)
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ldc1 $f30, THREAD_FPR30(\thread)
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ldc1 $f0, THREAD_FPR0_LS64(\thread)
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ldc1 $f2, THREAD_FPR2_LS64(\thread)
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ldc1 $f4, THREAD_FPR4_LS64(\thread)
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ldc1 $f6, THREAD_FPR6_LS64(\thread)
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ldc1 $f8, THREAD_FPR8_LS64(\thread)
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ldc1 $f10, THREAD_FPR10_LS64(\thread)
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ldc1 $f12, THREAD_FPR12_LS64(\thread)
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ldc1 $f14, THREAD_FPR14_LS64(\thread)
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ldc1 $f16, THREAD_FPR16_LS64(\thread)
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ldc1 $f18, THREAD_FPR18_LS64(\thread)
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ldc1 $f20, THREAD_FPR20_LS64(\thread)
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ldc1 $f22, THREAD_FPR22_LS64(\thread)
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ldc1 $f24, THREAD_FPR24_LS64(\thread)
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ldc1 $f26, THREAD_FPR26_LS64(\thread)
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ldc1 $f28, THREAD_FPR28_LS64(\thread)
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ldc1 $f30, THREAD_FPR30_LS64(\thread)
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ctc1 \tmp, fcr31
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.endm
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.macro fpu_restore_16odd thread
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.set push
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.set mips64r2
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ldc1 $f1, THREAD_FPR1(\thread)
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ldc1 $f3, THREAD_FPR3(\thread)
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ldc1 $f5, THREAD_FPR5(\thread)
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ldc1 $f7, THREAD_FPR7(\thread)
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ldc1 $f9, THREAD_FPR9(\thread)
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ldc1 $f11, THREAD_FPR11(\thread)
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ldc1 $f13, THREAD_FPR13(\thread)
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ldc1 $f15, THREAD_FPR15(\thread)
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ldc1 $f17, THREAD_FPR17(\thread)
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ldc1 $f19, THREAD_FPR19(\thread)
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ldc1 $f21, THREAD_FPR21(\thread)
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ldc1 $f23, THREAD_FPR23(\thread)
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ldc1 $f25, THREAD_FPR25(\thread)
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ldc1 $f27, THREAD_FPR27(\thread)
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ldc1 $f29, THREAD_FPR29(\thread)
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ldc1 $f31, THREAD_FPR31(\thread)
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ldc1 $f1, THREAD_FPR1_LS64(\thread)
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ldc1 $f3, THREAD_FPR3_LS64(\thread)
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ldc1 $f5, THREAD_FPR5_LS64(\thread)
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ldc1 $f7, THREAD_FPR7_LS64(\thread)
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ldc1 $f9, THREAD_FPR9_LS64(\thread)
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ldc1 $f11, THREAD_FPR11_LS64(\thread)
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ldc1 $f13, THREAD_FPR13_LS64(\thread)
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ldc1 $f15, THREAD_FPR15_LS64(\thread)
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ldc1 $f17, THREAD_FPR17_LS64(\thread)
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ldc1 $f19, THREAD_FPR19_LS64(\thread)
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ldc1 $f21, THREAD_FPR21_LS64(\thread)
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ldc1 $f23, THREAD_FPR23_LS64(\thread)
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ldc1 $f25, THREAD_FPR25_LS64(\thread)
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ldc1 $f27, THREAD_FPR27_LS64(\thread)
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ldc1 $f29, THREAD_FPR29_LS64(\thread)
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ldc1 $f31, THREAD_FPR31_LS64(\thread)
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.set pop
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.endm
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@ -169,6 +169,72 @@ void output_thread_fpu_defines(void)
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OFFSET(THREAD_FPR30, task_struct, thread.fpu.fpr[30]);
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OFFSET(THREAD_FPR31, task_struct, thread.fpu.fpr[31]);
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/* the least significant 64 bits of each FP register */
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OFFSET(THREAD_FPR0_LS64, task_struct,
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thread.fpu.fpr[0].val64[FPR_IDX(64, 0)]);
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OFFSET(THREAD_FPR1_LS64, task_struct,
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thread.fpu.fpr[1].val64[FPR_IDX(64, 0)]);
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OFFSET(THREAD_FPR2_LS64, task_struct,
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thread.fpu.fpr[2].val64[FPR_IDX(64, 0)]);
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OFFSET(THREAD_FPR3_LS64, task_struct,
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thread.fpu.fpr[3].val64[FPR_IDX(64, 0)]);
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OFFSET(THREAD_FPR4_LS64, task_struct,
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thread.fpu.fpr[4].val64[FPR_IDX(64, 0)]);
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OFFSET(THREAD_FPR5_LS64, task_struct,
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thread.fpu.fpr[5].val64[FPR_IDX(64, 0)]);
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OFFSET(THREAD_FPR6_LS64, task_struct,
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thread.fpu.fpr[6].val64[FPR_IDX(64, 0)]);
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OFFSET(THREAD_FPR7_LS64, task_struct,
|
||||
thread.fpu.fpr[7].val64[FPR_IDX(64, 0)]);
|
||||
OFFSET(THREAD_FPR8_LS64, task_struct,
|
||||
thread.fpu.fpr[8].val64[FPR_IDX(64, 0)]);
|
||||
OFFSET(THREAD_FPR9_LS64, task_struct,
|
||||
thread.fpu.fpr[9].val64[FPR_IDX(64, 0)]);
|
||||
OFFSET(THREAD_FPR10_LS64, task_struct,
|
||||
thread.fpu.fpr[10].val64[FPR_IDX(64, 0)]);
|
||||
OFFSET(THREAD_FPR11_LS64, task_struct,
|
||||
thread.fpu.fpr[11].val64[FPR_IDX(64, 0)]);
|
||||
OFFSET(THREAD_FPR12_LS64, task_struct,
|
||||
thread.fpu.fpr[12].val64[FPR_IDX(64, 0)]);
|
||||
OFFSET(THREAD_FPR13_LS64, task_struct,
|
||||
thread.fpu.fpr[13].val64[FPR_IDX(64, 0)]);
|
||||
OFFSET(THREAD_FPR14_LS64, task_struct,
|
||||
thread.fpu.fpr[14].val64[FPR_IDX(64, 0)]);
|
||||
OFFSET(THREAD_FPR15_LS64, task_struct,
|
||||
thread.fpu.fpr[15].val64[FPR_IDX(64, 0)]);
|
||||
OFFSET(THREAD_FPR16_LS64, task_struct,
|
||||
thread.fpu.fpr[16].val64[FPR_IDX(64, 0)]);
|
||||
OFFSET(THREAD_FPR17_LS64, task_struct,
|
||||
thread.fpu.fpr[17].val64[FPR_IDX(64, 0)]);
|
||||
OFFSET(THREAD_FPR18_LS64, task_struct,
|
||||
thread.fpu.fpr[18].val64[FPR_IDX(64, 0)]);
|
||||
OFFSET(THREAD_FPR19_LS64, task_struct,
|
||||
thread.fpu.fpr[19].val64[FPR_IDX(64, 0)]);
|
||||
OFFSET(THREAD_FPR20_LS64, task_struct,
|
||||
thread.fpu.fpr[20].val64[FPR_IDX(64, 0)]);
|
||||
OFFSET(THREAD_FPR21_LS64, task_struct,
|
||||
thread.fpu.fpr[21].val64[FPR_IDX(64, 0)]);
|
||||
OFFSET(THREAD_FPR22_LS64, task_struct,
|
||||
thread.fpu.fpr[22].val64[FPR_IDX(64, 0)]);
|
||||
OFFSET(THREAD_FPR23_LS64, task_struct,
|
||||
thread.fpu.fpr[23].val64[FPR_IDX(64, 0)]);
|
||||
OFFSET(THREAD_FPR24_LS64, task_struct,
|
||||
thread.fpu.fpr[24].val64[FPR_IDX(64, 0)]);
|
||||
OFFSET(THREAD_FPR25_LS64, task_struct,
|
||||
thread.fpu.fpr[25].val64[FPR_IDX(64, 0)]);
|
||||
OFFSET(THREAD_FPR26_LS64, task_struct,
|
||||
thread.fpu.fpr[26].val64[FPR_IDX(64, 0)]);
|
||||
OFFSET(THREAD_FPR27_LS64, task_struct,
|
||||
thread.fpu.fpr[27].val64[FPR_IDX(64, 0)]);
|
||||
OFFSET(THREAD_FPR28_LS64, task_struct,
|
||||
thread.fpu.fpr[28].val64[FPR_IDX(64, 0)]);
|
||||
OFFSET(THREAD_FPR29_LS64, task_struct,
|
||||
thread.fpu.fpr[29].val64[FPR_IDX(64, 0)]);
|
||||
OFFSET(THREAD_FPR30_LS64, task_struct,
|
||||
thread.fpu.fpr[30].val64[FPR_IDX(64, 0)]);
|
||||
OFFSET(THREAD_FPR31_LS64, task_struct,
|
||||
thread.fpu.fpr[31].val64[FPR_IDX(64, 0)]);
|
||||
|
||||
OFFSET(THREAD_FCR31, task_struct, thread.fpu.fcr31);
|
||||
BLANK();
|
||||
}
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче