Get rid of SINGLE_ONLY_FPU. Linux does not support half FPU other than

by emulation of a full FPU.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/math-emu/cp1emu.c b/arch/mips/math-emu/cp1emu.c
index c4a7853..aa5818a 100644 (file)
--- a/arch/mips/math-emu/cp1emu.c
+++ b/arch/mips/math-emu/cp1emu.c
@@ -256,7 +256,6 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx)
       emul:
        fpuemustats.emulated++;
        switch (MIPSInst_OPCODE(ir)) {
-#ifndef SINGLE_ONLY_FPU
        case ldc1_op:{
                u64 __user *va = (u64 __user *) (xcp->regs[MIPSInst_RS(ir)] +
                        MIPSInst_SIMM(ir));
@@ -284,7 +283,6 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx)
                }
                break;
        }
-#endif
 
        case lwc1_op:{
                u32 __user *va = (u32 __user *) (xcp->regs[MIPSInst_RS(ir)] +
@@ -296,12 +294,6 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx)
                        fpuemustats.errors++;
                        return SIGBUS;
                }
-#ifdef SINGLE_ONLY_FPU
-               if (MIPSInst_RT(ir) & 1) {
-                       /* illegal register in single-float mode */
-                       return SIGILL;
-               }
-#endif
                SITOREG(val, MIPSInst_RT(ir));
                break;
        }
@@ -312,12 +304,6 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx)
                u32 val;
 
                fpuemustats.stores++;
-#ifdef SINGLE_ONLY_FPU
-               if (MIPSInst_RT(ir) & 1) {
-                       /* illegal register in single-float mode */
-                       return SIGILL;
-               }
-#endif
                SIFROMREG(val, MIPSInst_RT(ir));
                if (put_user(val, va)) {
                        fpuemustats.errors++;
@@ -329,7 +315,7 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx)
        case cop1_op:
                switch (MIPSInst_RS(ir)) {
 
-#if defined(__mips64) && !defined(SINGLE_ONLY_FPU)
+#if defined(__mips64)
                case dmfc_op:
                        /* copregister fs -> gpr[rt] */
                        if (MIPSInst_RT(ir) != 0) {
@@ -346,12 +332,6 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx)
 
                case mfc_op:
                        /* copregister rd -> gpr[rt] */
-#ifdef SINGLE_ONLY_FPU
-                       if (MIPSInst_RD(ir) & 1) {
-                               /* illegal register in single-float mode */
-                               return SIGILL;
-                       }
-#endif
                        if (MIPSInst_RT(ir) != 0) {
                                SIFROMREG(xcp->regs[MIPSInst_RT(ir)],
                                        MIPSInst_RD(ir));
@@ -360,12 +340,6 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx)
 
                case mtc_op:
                        /* copregister rd <- rt */
-#ifdef SINGLE_ONLY_FPU
-                       if (MIPSInst_RD(ir) & 1) {
-                               /* illegal register in single-float mode */
-                               return SIGILL;
-                       }
-#endif
                        SITOREG(xcp->regs[MIPSInst_RT(ir)], MIPSInst_RD(ir));
                        break;
 
@@ -467,7 +441,7 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx)
                                switch (MIPSInst_OPCODE(ir)) {
                                case lwc1_op:
                                case swc1_op:
-#if (__mips >= 2 || defined(__mips64)) && !defined(SINGLE_ONLY_FPU)
+#if (__mips >= 2 || defined(__mips64))
                                case ldc1_op:
                                case sdc1_op:
 #endif
@@ -646,14 +620,6 @@ static int fpux_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
                                fpuemustats.errors++;
                                return SIGBUS;
                        }
-#ifdef SINGLE_ONLY_FPU
-                       if (MIPSInst_FD(ir) & 1) {
-                               /* illegal register in single-float
-                                * mode
-                                */
-                               return SIGILL;
-                       }
-#endif
                        SITOREG(val, MIPSInst_FD(ir));
                        break;
 
@@ -662,14 +628,6 @@ static int fpux_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
                                xcp->regs[MIPSInst_FT(ir)]);
 
                        fpuemustats.stores++;
-#ifdef SINGLE_ONLY_FPU
-                       if (MIPSInst_FS(ir) & 1) {
-                               /* illegal register in single-float
-                                * mode
-                                */
-                               return SIGILL;
-                       }
-#endif
 
                        SIFROMREG(val, MIPSInst_FS(ir));
                        if (put_user(val, va)) {
@@ -723,7 +681,6 @@ static int fpux_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
                break;
        }
 
-#ifndef SINGLE_ONLY_FPU
        case d_fmt:{            /* 1 */
                ieee754dp(*handler) (ieee754dp, ieee754dp, ieee754dp);
                ieee754dp fd, fr, fs, ft;
@@ -781,7 +738,6 @@ static int fpux_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
                }
                break;
        }
-#endif
 
        case 0x7:               /* 7 */
                if (MIPSInst_FUNC(ir) != pfetch_op) {
@@ -921,9 +877,6 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
                case fcvts_op:
                        return SIGILL;  /* not defined */
                case fcvtd_op:{
-#ifdef SINGLE_ONLY_FPU
-                       return SIGILL;  /* not defined */
-#else
                        ieee754sp fs;
 
                        SPFROMREG(fs, MIPSInst_FS(ir));
@@ -931,7 +884,6 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
                        rfmt = d_fmt;
                        goto copcsr;
                }
-#endif
                case fcvtw_op:{
                        ieee754sp fs;
 
@@ -958,7 +910,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
                }
 #endif /* __mips >= 2 */
 
-#if defined(__mips64) && !defined(SINGLE_ONLY_FPU)
+#if defined(__mips64)
                case fcvtl_op:{
                        ieee754sp fs;
 
@@ -982,7 +934,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
                        rfmt = l_fmt;
                        goto copcsr;
                }
-#endif /* defined(__mips64) && !fpu(single) */
+#endif /* defined(__mips64) */
 
                default:
                        if (MIPSInst_FUNC(ir) >= fcmp_op) {
@@ -1009,7 +961,6 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
                break;
        }
 
-#ifndef SINGLE_ONLY_FPU
        case d_fmt:{
                union {
                        ieee754dp(*b) (ieee754dp, ieee754dp);
@@ -1133,7 +1084,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
                }
 #endif
 
-#if defined(__mips64) && !defined(SINGLE_ONLY_FPU)
+#if defined(__mips64)
                case fcvtl_op:{
                        ieee754dp fs;
 
@@ -1157,7 +1108,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
                        rfmt = l_fmt;
                        goto copcsr;
                }
-#endif /* __mips >= 3 && !fpu(single) */
+#endif /* __mips >= 3 */
 
                default:
                        if (MIPSInst_FUNC(ir) >= fcmp_op) {
@@ -1185,7 +1136,6 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
                }
                break;
        }
-#endif /* ifndef SINGLE_ONLY_FPU */
 
        case w_fmt:{
                ieee754sp fs;
@@ -1197,21 +1147,19 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
                        rv.s = ieee754sp_fint(fs.bits);
                        rfmt = s_fmt;
                        goto copcsr;
-#ifndef SINGLE_ONLY_FPU
                case fcvtd_op:
                        /* convert word to double precision real */
                        SPFROMREG(fs, MIPSInst_FS(ir));
                        rv.d = ieee754dp_fint(fs.bits);
                        rfmt = d_fmt;
                        goto copcsr;
-#endif
                default:
                        return SIGILL;
                }
                break;
        }
 
-#if defined(__mips64) && !defined(SINGLE_ONLY_FPU)
+#if defined(__mips64)
        case l_fmt:{
                switch (MIPSInst_FUNC(ir)) {
                case fcvts_op:
@@ -1264,18 +1212,16 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
                        ctx->fcr31 &= ~cond;
                break;
        }
-#ifndef SINGLE_ONLY_FPU
        case d_fmt:
                DPTOREG(rv.d, MIPSInst_FD(ir));
                break;
-#endif
        case s_fmt:
                SPTOREG(rv.s, MIPSInst_FD(ir));
                break;
        case w_fmt:
                SITOREG(rv.w, MIPSInst_FD(ir));
                break;
-#if defined(__mips64) && !defined(SINGLE_ONLY_FPU)
+#if defined(__mips64)
        case l_fmt:
                DITOREG(rv.l, MIPSInst_FD(ir));
                break;