summaryrefslogtreecommitdiff
path: root/arch/mips/math-emu
diff options
context:
space:
mode:
Diffstat (limited to 'arch/mips/math-emu')
-rw-r--r--arch/mips/math-emu/Makefile1
-rw-r--r--arch/mips/math-emu/cp1emu.c23
-rw-r--r--arch/mips/math-emu/dp_add.c2
-rw-r--r--arch/mips/math-emu/dp_sqrt.c6
-rw-r--r--arch/mips/math-emu/dp_sub.c2
-rw-r--r--arch/mips/math-emu/ieee754.c18
-rw-r--r--arch/mips/math-emu/ieee754dp.c2
-rw-r--r--arch/mips/math-emu/ieee754int.h2
-rw-r--r--arch/mips/math-emu/ieee754sp.c2
-rw-r--r--arch/mips/math-emu/ieee754xcpt.c2
-rw-r--r--arch/mips/math-emu/kernel_linkage.c2
-rw-r--r--arch/mips/math-emu/sp_add.c2
-rw-r--r--arch/mips/math-emu/sp_mul.c4
-rw-r--r--arch/mips/math-emu/sp_sub.c2
14 files changed, 35 insertions, 35 deletions
diff --git a/arch/mips/math-emu/Makefile b/arch/mips/math-emu/Makefile
index 9660723..121a848 100644
--- a/arch/mips/math-emu/Makefile
+++ b/arch/mips/math-emu/Makefile
@@ -9,4 +9,3 @@ obj-y := cp1emu.o ieee754m.o ieee754d.o ieee754dp.o ieee754sp.o ieee754.o \
sp_div.o sp_mul.o sp_sub.o sp_add.o sp_fdp.o sp_cmp.o sp_logb.o \
sp_scalb.o sp_simple.o sp_tint.o sp_fint.o sp_tlong.o sp_flong.o \
dp_sqrt.o sp_sqrt.o kernel_linkage.o dsemul.o
-
diff --git a/arch/mips/math-emu/cp1emu.c b/arch/mips/math-emu/cp1emu.c
index a03bf00..afb5a0b 100644
--- a/arch/mips/math-emu/cp1emu.c
+++ b/arch/mips/math-emu/cp1emu.c
@@ -169,18 +169,19 @@ static int isBranchInstr(mips_instruction * i)
/*
* In the Linux kernel, we support selection of FPR format on the
- * basis of the Status.FR bit. If an FPU is not present, the FR bit
+ * basis of the Status.FR bit. If an FPU is not present, the FR bit
* is hardwired to zero, which would imply a 32-bit FPU even for
- * 64-bit CPUs. For 64-bit kernels with no FPU we use TIF_32BIT_REGS
- * as a proxy for the FR bit so that a 64-bit FPU is emulated. In any
- * case, for a 32-bit kernel which uses the O32 MIPS ABI, only the
- * even FPRs are used (Status.FR = 0).
+ * 64-bit CPUs so we rather look at TIF_32BIT_REGS.
+ * FPU emu is slow and bulky and optimizing this function offers fairly
+ * sizeable benefits so we try to be clever and make this function return
+ * a constant whenever possible, that is on 64-bit kernels without O32
+ * compatibility enabled and on 32-bit kernels.
*/
static inline int cop1_64bit(struct pt_regs *xcp)
{
- if (cpu_has_fpu)
- return xcp->cp0_status & ST0_FR;
-#ifdef CONFIG_64BIT
+#if defined(CONFIG_64BIT) && !defined(CONFIG_MIPS32_O32)
+ return 1;
+#elif defined(CONFIG_64BIT) && defined(CONFIG_MIPS32_O32)
return !test_thread_flag(TIF_32BIT_REGS);
#else
return 0;
@@ -233,7 +234,7 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_struct *ctx,
if (xcp->cp0_cause & CAUSEF_BD) {
/*
* The instruction to be emulated is in a branch delay slot
- * which means that we have to emulate the branch instruction
+ * which means that we have to emulate the branch instruction
* BEFORE we do the cop1 instruction.
*
* This branch could be a COP1 branch, but in that case we
@@ -1334,8 +1335,8 @@ int fpu_emulator_cop1Handler(struct pt_regs *xcp, struct mips_fpu_struct *ctx,
else {
/*
* The 'ieee754_csr' is an alias of
- * ctx->fcr31. No need to copy ctx->fcr31 to
- * ieee754_csr. But ieee754_csr.rm is ieee
+ * ctx->fcr31. No need to copy ctx->fcr31 to
+ * ieee754_csr. But ieee754_csr.rm is ieee
* library modes. (not mips rounding mode)
*/
/* convert to ieee library modes */
diff --git a/arch/mips/math-emu/dp_add.c b/arch/mips/math-emu/dp_add.c
index b422fca..c57c8ad 100644
--- a/arch/mips/math-emu/dp_add.c
+++ b/arch/mips/math-emu/dp_add.c
@@ -153,7 +153,7 @@ ieee754dp ieee754dp_add(ieee754dp x, ieee754dp y)
xe = xe;
xs = xs;
- if (xm >> (DP_MBITS + 1 + 3)) { /* carry out */
+ if (xm >> (DP_MBITS + 1 + 3)) { /* carry out */
xm = XDPSRS1(xm);
xe++;
}
diff --git a/arch/mips/math-emu/dp_sqrt.c b/arch/mips/math-emu/dp_sqrt.c
index a2a51b8..b874d60 100644
--- a/arch/mips/math-emu/dp_sqrt.c
+++ b/arch/mips/math-emu/dp_sqrt.c
@@ -87,7 +87,7 @@ ieee754dp ieee754dp_sqrt(ieee754dp x)
if (xe > 512) { /* x > 2**-512? */
xe -= 512; /* x = x / 2**512 */
scalx += 256;
- } else if (xe < -512) { /* x < 2**-512? */
+ } else if (xe < -512) { /* x < 2**-512? */
xe += 512; /* x = x * 2**512 */
scalx -= 256;
}
@@ -108,13 +108,13 @@ ieee754dp ieee754dp_sqrt(ieee754dp x)
y.bits &= 0xffffffff00000000LL;
/* triple to almost 56 sig. bits: y ~= sqrt(x) to within 1 ulp */
- /* t=y*y; z=t; pt[n0]+=0x00100000; t+=z; z=(x-z)*y; */
+ /* t=y*y; z=t; pt[n0]+=0x00100000; t+=z; z=(x-z)*y; */
z = t = ieee754dp_mul(y, y);
t.parts.bexp += 0x001;
t = ieee754dp_add(t, z);
z = ieee754dp_mul(ieee754dp_sub(x, z), y);
- /* t=z/(t+x) ; pt[n0]+=0x00100000; y+=t; */
+ /* t=z/(t+x) ; pt[n0]+=0x00100000; y+=t; */
t = ieee754dp_div(z, ieee754dp_add(t, x));
t.parts.bexp += 0x001;
y = ieee754dp_add(y, t);
diff --git a/arch/mips/math-emu/dp_sub.c b/arch/mips/math-emu/dp_sub.c
index 0de098c..91e0a4b 100644
--- a/arch/mips/math-emu/dp_sub.c
+++ b/arch/mips/math-emu/dp_sub.c
@@ -158,7 +158,7 @@ ieee754dp ieee754dp_sub(ieee754dp x, ieee754dp y)
xe = xe;
xs = xs;
- if (xm >> (DP_MBITS + 1 + 3)) { /* carry out */
+ if (xm >> (DP_MBITS + 1 + 3)) { /* carry out */
xm = XDPSRS1(xm); /* shift preserving sticky */
xe++;
}
diff --git a/arch/mips/math-emu/ieee754.c b/arch/mips/math-emu/ieee754.c
index 30554e1..0015cf1 100644
--- a/arch/mips/math-emu/ieee754.c
+++ b/arch/mips/math-emu/ieee754.c
@@ -56,21 +56,21 @@
#endif
const struct ieee754dp_konst __ieee754dp_spcvals[] = {
- DPSTR(0, DP_EMIN - 1 + DP_EBIAS, 0, 0), /* + zero */
- DPSTR(1, DP_EMIN - 1 + DP_EBIAS, 0, 0), /* - zero */
+ DPSTR(0, DP_EMIN - 1 + DP_EBIAS, 0, 0), /* + zero */
+ DPSTR(1, DP_EMIN - 1 + DP_EBIAS, 0, 0), /* - zero */
DPSTR(0, DP_EBIAS, 0, 0), /* + 1.0 */
DPSTR(1, DP_EBIAS, 0, 0), /* - 1.0 */
DPSTR(0, 3 + DP_EBIAS, 0x40000, 0), /* + 10.0 */
DPSTR(1, 3 + DP_EBIAS, 0x40000, 0), /* - 10.0 */
- DPSTR(0, DP_EMAX + 1 + DP_EBIAS, 0, 0), /* + infinity */
- DPSTR(1, DP_EMAX + 1 + DP_EBIAS, 0, 0), /* - infinity */
+ DPSTR(0, DP_EMAX + 1 + DP_EBIAS, 0, 0), /* + infinity */
+ DPSTR(1, DP_EMAX + 1 + DP_EBIAS, 0, 0), /* - infinity */
DPSTR(0, DP_EMAX+1+DP_EBIAS, 0x7FFFF, 0xFFFFFFFF), /* + indef quiet Nan */
DPSTR(0, DP_EMAX + DP_EBIAS, 0xFFFFF, 0xFFFFFFFF), /* + max */
DPSTR(1, DP_EMAX + DP_EBIAS, 0xFFFFF, 0xFFFFFFFF), /* - max */
DPSTR(0, DP_EMIN + DP_EBIAS, 0, 0), /* + min normal */
DPSTR(1, DP_EMIN + DP_EBIAS, 0, 0), /* - min normal */
- DPSTR(0, DP_EMIN - 1 + DP_EBIAS, 0, 1), /* + min denormal */
- DPSTR(1, DP_EMIN - 1 + DP_EBIAS, 0, 1), /* - min denormal */
+ DPSTR(0, DP_EMIN - 1 + DP_EBIAS, 0, 1), /* + min denormal */
+ DPSTR(1, DP_EMIN - 1 + DP_EBIAS, 0, 1), /* - min denormal */
DPSTR(0, 31 + DP_EBIAS, 0, 0), /* + 1.0e31 */
DPSTR(0, 63 + DP_EBIAS, 0, 0), /* + 1.0e63 */
};
@@ -84,9 +84,9 @@ const struct ieee754sp_konst __ieee754sp_spcvals[] = {
SPSTR(1, 3 + SP_EBIAS, 0x200000), /* - 10.0 */
SPSTR(0, SP_EMAX + 1 + SP_EBIAS, 0), /* + infinity */
SPSTR(1, SP_EMAX + 1 + SP_EBIAS, 0), /* - infinity */
- SPSTR(0, SP_EMAX+1+SP_EBIAS, 0x3FFFFF), /* + indef quiet Nan */
- SPSTR(0, SP_EMAX + SP_EBIAS, 0x7FFFFF), /* + max normal */
- SPSTR(1, SP_EMAX + SP_EBIAS, 0x7FFFFF), /* - max normal */
+ SPSTR(0, SP_EMAX+1+SP_EBIAS, 0x3FFFFF), /* + indef quiet Nan */
+ SPSTR(0, SP_EMAX + SP_EBIAS, 0x7FFFFF), /* + max normal */
+ SPSTR(1, SP_EMAX + SP_EBIAS, 0x7FFFFF), /* - max normal */
SPSTR(0, SP_EMIN + SP_EBIAS, 0), /* + min normal */
SPSTR(1, SP_EMIN + SP_EBIAS, 0), /* - min normal */
SPSTR(0, SP_EMIN - 1 + SP_EBIAS, 1), /* + min denormal */
diff --git a/arch/mips/math-emu/ieee754dp.c b/arch/mips/math-emu/ieee754dp.c
index 080b5ca..068e56b 100644
--- a/arch/mips/math-emu/ieee754dp.c
+++ b/arch/mips/math-emu/ieee754dp.c
@@ -116,7 +116,7 @@ static u64 get_rounding(int sn, u64 xm)
xm += 0x8;
break;
case IEEE754_RD: /* toward -Infinity */
- if (sn) /* ?? */
+ if (sn) /* ?? */
xm += 0x8;
break;
}
diff --git a/arch/mips/math-emu/ieee754int.h b/arch/mips/math-emu/ieee754int.h
index 2a7d43f..4b6c6fb3 100644
--- a/arch/mips/math-emu/ieee754int.h
+++ b/arch/mips/math-emu/ieee754int.h
@@ -56,7 +56,7 @@
#define CLPAIR(x, y) ((x)*6+(y))
-#define CLEARCX \
+#define CLEARCX \
(ieee754_csr.cx = 0)
#define SETCX(x) \
diff --git a/arch/mips/math-emu/ieee754sp.c b/arch/mips/math-emu/ieee754sp.c
index 271d00d..15d1e36 100644
--- a/arch/mips/math-emu/ieee754sp.c
+++ b/arch/mips/math-emu/ieee754sp.c
@@ -117,7 +117,7 @@ static unsigned get_rounding(int sn, unsigned xm)
xm += 0x8;
break;
case IEEE754_RD: /* toward -Infinity */
- if (sn) /* ?? */
+ if (sn) /* ?? */
xm += 0x8;
break;
}
diff --git a/arch/mips/math-emu/ieee754xcpt.c b/arch/mips/math-emu/ieee754xcpt.c
index b99a693..9671671 100644
--- a/arch/mips/math-emu/ieee754xcpt.c
+++ b/arch/mips/math-emu/ieee754xcpt.c
@@ -25,7 +25,7 @@
* Added preprocessor hacks to map to Linux kernel diagnostics.
*
* Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com
- * Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
+ * Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
*************************************************************************/
#include <linux/kernel.h>
diff --git a/arch/mips/math-emu/kernel_linkage.c b/arch/mips/math-emu/kernel_linkage.c
index 52e6c58..1c58657 100644
--- a/arch/mips/math-emu/kernel_linkage.c
+++ b/arch/mips/math-emu/kernel_linkage.c
@@ -1,6 +1,6 @@
/*
* Kevin D. Kissell, kevink@mips and Carsten Langgaard, carstenl@mips.com
- * Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
+ * Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
*
* This program is free software; you can distribute it and/or modify it
* under the terms of the GNU General Public License (Version 2) as
diff --git a/arch/mips/math-emu/sp_add.c b/arch/mips/math-emu/sp_add.c
index ae1a327..c446e64 100644
--- a/arch/mips/math-emu/sp_add.c
+++ b/arch/mips/math-emu/sp_add.c
@@ -148,7 +148,7 @@ ieee754sp ieee754sp_add(ieee754sp x, ieee754sp y)
xe = xe;
xs = xs;
- if (xm >> (SP_MBITS + 1 + 3)) { /* carry out */
+ if (xm >> (SP_MBITS + 1 + 3)) { /* carry out */
SPXSRSX1();
}
} else {
diff --git a/arch/mips/math-emu/sp_mul.c b/arch/mips/math-emu/sp_mul.c
index 2722a25..fa4675c 100644
--- a/arch/mips/math-emu/sp_mul.c
+++ b/arch/mips/math-emu/sp_mul.c
@@ -131,7 +131,7 @@ ieee754sp ieee754sp_mul(ieee754sp x, ieee754sp y)
hrm = hxm * hym; /* 16 * 16 => 32 */
{
- unsigned t = lxm * hym; /* 16 * 16 => 32 */
+ unsigned t = lxm * hym; /* 16 * 16 => 32 */
{
unsigned at = lrm + (t << 16);
hrm += at < lrm;
@@ -141,7 +141,7 @@ ieee754sp ieee754sp_mul(ieee754sp x, ieee754sp y)
}
{
- unsigned t = hxm * lym; /* 16 * 16 => 32 */
+ unsigned t = hxm * lym; /* 16 * 16 => 32 */
{
unsigned at = lrm + (t << 16);
hrm += at < lrm;
diff --git a/arch/mips/math-emu/sp_sub.c b/arch/mips/math-emu/sp_sub.c
index 886ed5b..e595c6f 100644
--- a/arch/mips/math-emu/sp_sub.c
+++ b/arch/mips/math-emu/sp_sub.c
@@ -153,7 +153,7 @@ ieee754sp ieee754sp_sub(ieee754sp x, ieee754sp y)
xe = xe;
xs = xs;
- if (xm >> (SP_MBITS + 1 + 3)) { /* carry out */
+ if (xm >> (SP_MBITS + 1 + 3)) { /* carry out */
SPXSRSX1(); /* shift preserving sticky */
}
} else {
generated by cgit v0.10.2 at 2024-11-11 15:20:24 (GMT)