powerpc/math-emu: Fix decoding of some instructions
The decoding of some instructions such as fsqrt{s} was incorrect, using the wrong registers, and thus could not work. This fixes it and also adds a couple of place holders for missing instructions. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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a5e4797b0f
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@ -4,7 +4,8 @@ obj-$(CONFIG_MATH_EMULATION) += fabs.o fadd.o fadds.o fcmpo.o fcmpu.o \
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fmadd.o fmadds.o fmsub.o fmsubs.o \
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fmul.o fmuls.o fnabs.o fneg.o \
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fnmadd.o fnmadds.o fnmsub.o fnmsubs.o \
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fres.o frsp.o frsqrte.o fsel.o lfs.o \
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fres.o fre.o frsp.o fsel.o lfs.o \
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frsqrte.o frsqrtes.o \
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fsqrt.o fsqrts.o fsub.o fsubs.o \
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mcrfs.o mffs.o mtfsb0.o mtfsb1.o \
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mtfsf.o mtfsfi.o stfiwx.o stfs.o \
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11
arch/powerpc/math-emu/fre.c
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11
arch/powerpc/math-emu/fre.c
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@ -0,0 +1,11 @@
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <asm/uaccess.h>
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int fre(void *frD, void *frB)
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{
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#ifdef DEBUG
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printk("%s: %p %p\n", __func__, frD, frB);
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#endif
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return -ENOSYS;
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}
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11
arch/powerpc/math-emu/frsqrtes.c
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arch/powerpc/math-emu/frsqrtes.c
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@ -0,0 +1,11 @@
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <asm/uaccess.h>
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int frsqrtes(void *frD, void *frB)
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{
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#ifdef DEBUG
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printk("%s: %p %p\n", __func__, frD, frB);
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#endif
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return 0;
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}
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@ -58,8 +58,10 @@ FLOATFUNC(fnabs);
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FLOATFUNC(fneg);
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/* Optional */
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FLOATFUNC(fre);
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FLOATFUNC(fres);
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FLOATFUNC(frsqrte);
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FLOATFUNC(frsqrtes);
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FLOATFUNC(fsel);
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FLOATFUNC(fsqrt);
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FLOATFUNC(fsqrts);
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@ -97,6 +99,7 @@ FLOATFUNC(fsqrts);
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#define FSQRTS 0x016 /* 22 */
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#define FRES 0x018 /* 24 */
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#define FMULS 0x019 /* 25 */
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#define FRSQRTES 0x01a /* 26 */
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#define FMSUBS 0x01c /* 28 */
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#define FMADDS 0x01d /* 29 */
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#define FNMSUBS 0x01e /* 30 */
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@ -109,6 +112,7 @@ FLOATFUNC(fsqrts);
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#define FADD 0x015 /* 21 */
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#define FSQRT 0x016 /* 22 */
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#define FSEL 0x017 /* 23 */
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#define FRE 0x018 /* 24 */
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#define FMUL 0x019 /* 25 */
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#define FRSQRTE 0x01a /* 26 */
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#define FMSUB 0x01c /* 28 */
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@ -299,9 +303,10 @@ do_mathemu(struct pt_regs *regs)
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case FDIVS: func = fdivs; type = AB; break;
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case FSUBS: func = fsubs; type = AB; break;
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case FADDS: func = fadds; type = AB; break;
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case FSQRTS: func = fsqrts; type = AB; break;
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case FRES: func = fres; type = AB; break;
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case FSQRTS: func = fsqrts; type = XB; break;
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case FRES: func = fres; type = XB; break;
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case FMULS: func = fmuls; type = AC; break;
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case FRSQRTES: func = frsqrtes;type = XB; break;
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case FMSUBS: func = fmsubs; type = ABC; break;
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case FMADDS: func = fmadds; type = ABC; break;
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case FNMSUBS: func = fnmsubs; type = ABC; break;
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@ -317,10 +322,11 @@ do_mathemu(struct pt_regs *regs)
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case FDIV: func = fdiv; type = AB; break;
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case FSUB: func = fsub; type = AB; break;
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case FADD: func = fadd; type = AB; break;
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case FSQRT: func = fsqrt; type = AB; break;
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case FSQRT: func = fsqrt; type = XB; break;
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case FRE: func = fre; type = XB; break;
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case FSEL: func = fsel; type = ABC; break;
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case FMUL: func = fmul; type = AC; break;
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case FRSQRTE: func = frsqrte; type = AB; break;
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case FRSQRTE: func = frsqrte; type = XB; break;
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case FMSUB: func = fmsub; type = ABC; break;
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case FMADD: func = fmadd; type = ABC; break;
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case FNMSUB: func = fnmsub; type = ABC; break;
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