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linux/arch/mips/math-emu
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Paul Burton c8c0da6bdf MIPS: Fix MFC1 & MFHC1 emulation for 64-bit MIPS systems 
Commit bbd426f542 "MIPS: Simplify FP context access" modified the
SIFROMREG & SIFROMHREG macros such that they return unsigned rather
than signed 32b integers. I had believed that to be fine, but
inadvertently missed the MFC1 & MFHC1 cases which write to a struct
pt_regs regs element. On MIPS32 this is fine, but on 64 bit those
saved regs' fields are 64 bit wide. Using unsigned values caused the
32 bit value from the FP register to be zero rather than sign extended
as the architecture specifies, causing incorrect emulation of the
MFC1 & MFHc1 instructions. Fix by reintroducing the casts to signed
integers, and therefore the sign extension.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: stable@vger.kernel.org # v3.15+
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7848/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-09-26 11:33:11 +02:00
..
cp1emu.c MIPS: Fix MFC1 & MFHC1 emulation for 64-bit MIPS systems 2014-09-26 11:33:11 +02:00
dp_add.c MIPS: math-emu: Switch to using the MIPS rounding modes. 2014-05-23 15:12:38 +02:00
dp_cmp.c MIPS: math-emu: Cleanup coding style. 2014-05-23 15:11:15 +02:00
dp_div.c MIPS: math-emu: Cleanup coding style. 2014-05-23 15:11:15 +02:00
dp_fint.c MIPS: math-emu: Cleanup coding style. 2014-05-23 15:11:15 +02:00
dp_flong.c MIPS: math-emu: Cleanup coding style. 2014-05-23 15:11:15 +02:00
dp_fsp.c MIPS: math-emu: Cleanup coding style. 2014-05-23 15:11:15 +02:00
dp_mul.c MIPS: math-emu: Cleanup coding style. 2014-05-23 15:11:15 +02:00
dp_simple.c MIPS: math-emu: Cleanup coding style. 2014-05-23 15:11:15 +02:00
dp_sqrt.c MIPS: math-emu: Switch to using the MIPS rounding modes. 2014-05-23 15:12:38 +02:00
dp_sub.c MIPS: math-emu: Switch to using the MIPS rounding modes. 2014-05-23 15:12:38 +02:00
dp_tint.c MIPS: math-emu: Switch to using the MIPS rounding modes. 2014-05-23 15:12:38 +02:00
dp_tlong.c MIPS: math-emu: Switch to using the MIPS rounding modes. 2014-05-23 15:12:38 +02:00
dsemul.c MIPS: math-emu: Convert debug printks to pr_debug getting. 2014-05-23 15:11:04 +02:00
ieee754.c MIPS: math-emu: Reduce code duplication. 2014-06-26 10:47:55 +01:00
ieee754.h MIPS: math-emu: Switch to using the MIPS rounding modes. 2014-05-23 15:12:38 +02:00
ieee754d.c MIPS: math-emu: Cleanup coding style. 2014-05-23 15:11:15 +02:00
ieee754dp.c MIPS: math-emu: Switch to using the MIPS rounding modes. 2014-05-23 15:12:38 +02:00
ieee754dp.h MIPS: math-emu: Cleanup coding style. 2014-05-23 15:11:15 +02:00
ieee754int.h MIPS: math-emu: Cleanup coding style. 2014-05-23 15:11:15 +02:00
ieee754sp.c MIPS: math-emu: Switch to using the MIPS rounding modes. 2014-05-23 15:12:38 +02:00
ieee754sp.h MIPS: math-emu: Cleanup coding style. 2014-05-23 15:11:15 +02:00
Makefile MIPS: math-emu: Inline fpu_emulator_init_fpu() 2014-05-23 15:12:37 +02:00
me-debugfs.c MIPS: math-emu: Add IEEE754 exception statistics to debugfs 2014-05-30 11:55:23 +02:00
sp_add.c MIPS: math-emu: Switch to using the MIPS rounding modes. 2014-05-23 15:12:38 +02:00
sp_cmp.c MIPS: math-emu: Cleanup coding style. 2014-05-23 15:11:15 +02:00
sp_div.c MIPS: math-emu: Cleanup coding style. 2014-05-23 15:11:15 +02:00
sp_fdp.c MIPS: math-emu: Switch to using the MIPS rounding modes. 2014-05-23 15:12:38 +02:00
sp_fint.c MIPS: math-emu: Cleanup coding style. 2014-05-23 15:11:15 +02:00
sp_flong.c MIPS: math-emu: Cleanup coding style. 2014-05-23 15:11:15 +02:00
sp_mul.c MIPS: math-emu: Cleanup coding style. 2014-05-23 15:11:15 +02:00
sp_simple.c MIPS: math-emu: Cleanup coding style. 2014-05-23 15:11:15 +02:00
sp_sqrt.c MIPS: math-emu: Switch to using the MIPS rounding modes. 2014-05-23 15:12:38 +02:00
sp_sub.c MIPS: math-emu: Switch to using the MIPS rounding modes. 2014-05-23 15:12:38 +02:00
sp_tint.c MIPS: math-emu: Switch to using the MIPS rounding modes. 2014-05-23 15:12:38 +02:00
sp_tlong.c MIPS: math-emu: Switch to using the MIPS rounding modes. 2014-05-23 15:12:38 +02:00