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authorRichard Sandiford <rdsandiford@googlemail.com>2004-03-01 09:33:48 +0000
committerRichard Sandiford <rdsandiford@googlemail.com>2004-03-01 09:33:48 +0000
commit8b73069fed6ec6b73e35eccdf186887d89ecb84b (patch)
tree00fb7c94453402251df5876c67b036abdf8437b4 /sim
parent8ae0baa2685df96375cc43b44b5632044288f74a (diff)
downloadgdb-8b73069fed6ec6b73e35eccdf186887d89ecb84b.zip
gdb-8b73069fed6ec6b73e35eccdf186887d89ecb84b.tar.gz
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sim/frv/
* frv.c (frvbf_iacc_cut): Rework, taking rounding into account. testsuite/ * sim/frv/fr400/scutss.cgs: Fix tests to account for rounding. Add some new ones.
Diffstat (limited to 'sim')
-rw-r--r--sim/frv/ChangeLog4
-rw-r--r--sim/frv/frv.c57
-rw-r--r--sim/testsuite/ChangeLog5
-rw-r--r--sim/testsuite/sim/frv/fr400/scutss.cgs138
4 files changed, 132 insertions, 72 deletions
diff --git a/sim/frv/ChangeLog b/sim/frv/ChangeLog
index 41462a3..652c956 100644
--- a/sim/frv/ChangeLog
+++ b/sim/frv/ChangeLog
@@ -1,5 +1,9 @@
2004-03-01 Richard Sandiford <rsandifo@redhat.com>
+ * frv.c (frvbf_iacc_cut): Rework, taking rounding into account.
+
+2004-03-01 Richard Sandiford <rsandifo@redhat.com>
+
* decode.c, decode.h, model.c, sem.c: Regenerate.
2003-11-24 Kevin Buettner <kevinb@redhat.com>
diff --git a/sim/frv/frv.c b/sim/frv/frv.c
index de1ff1d..2640b1c 100644
--- a/sim/frv/frv.c
+++ b/sim/frv/frv.c
@@ -1,5 +1,6 @@
/* frv simulator support code
- Copyright (C) 1998, 1999, 2000, 2001, 2003 Free Software Foundation, Inc.
+ Copyright (C) 1998, 1999, 2000, 2001, 2003, 2004 Free Software
+ Foundation, Inc.
Contributed by Red Hat.
This file is part of the GNU simulators.
@@ -1100,25 +1101,53 @@ frvbf_media_cut_ss (SIM_CPU *current_cpu, DI acc, SI cut_point)
SI
frvbf_iacc_cut (SIM_CPU *current_cpu, DI acc, SI cut_point)
{
- /* The cut point is the lower 6 bits (signed) of what we are passed. */
+ DI lower, upper;
+
+ /* The cut point is the lower 7 bits (signed) of what we are passed. */
cut_point = cut_point << 25 >> 25;
- if (cut_point <= -32)
- cut_point = -31; /* Special case for full shiftout. */
+ /* Conceptually, the operation is on a 128-bit sign-extension of ACC.
+ The top bit of the return value corresponds to bit (63 - CUT_POINT)
+ of this 128-bit value.
- /* Negative cuts (cannot saturate). */
+ Since we can't deal with 128-bit values very easily, convert the
+ operation into an equivalent 64-bit one. */
if (cut_point < 0)
- return acc >> (32 + -cut_point);
+ {
+ /* Avoid an undefined shift operation. */
+ if (cut_point == -64)
+ acc >>= 63;
+ else
+ acc >>= -cut_point;
+ cut_point = 0;
+ }
- /* Positive cuts will saturate if significant bits are shifted out. */
- if (acc != ((acc << cut_point) >> cut_point))
- if (acc >= 0)
- return 0x7fffffff;
- else
- return 0x80000000;
+ /* Get the shifted but unsaturated result. Set LOWER to the lowest
+ 32 bits of the result and UPPER to the result >> 31. */
+ if (cut_point < 32)
+ {
+ /* The cut loses the (32 - CUT_POINT) least significant bits.
+ Round the result up if the most significant of these lost bits
+ is 1. */
+ lower = acc >> (32 - cut_point);
+ if (lower < 0x7fffffff)
+ if (acc & LSBIT64 (32 - cut_point - 1))
+ lower++;
+ upper = lower >> 31;
+ }
+ else
+ {
+ lower = acc << (cut_point - 32);
+ upper = acc >> (63 - cut_point);
+ }
- /* No saturate, just cut. */
- return ((acc << cut_point) >> 32);
+ /* Saturate the result. */
+ if (upper < -1)
+ return ~0x7fffffff;
+ else if (upper > 0)
+ return 0x7fffffff;
+ else
+ return lower;
}
/* Compute the result of shift-left-arithmetic-with-saturation (SLASS). */
diff --git a/sim/testsuite/ChangeLog b/sim/testsuite/ChangeLog
index 32e71da..e1d6069 100644
--- a/sim/testsuite/ChangeLog
+++ b/sim/testsuite/ChangeLog
@@ -1,5 +1,10 @@
2004-03-01 Richard Sandiford <rsandifo@redhat.com>
+ * sim/frv/fr400/scutss.cgs: Fix tests to account for rounding.
+ Add some new ones.
+
+2004-03-01 Richard Sandiford <rsandifo@redhat.com>
+
* sim/frv/{rstb,rsth,rst,rstd,rstq}.cgs: Delete.
* sim/frv/{rstbf,rsthf,rstf,rstdf,rstqf}.cgs: Delete.
diff --git a/sim/testsuite/sim/frv/fr400/scutss.cgs b/sim/testsuite/sim/frv/fr400/scutss.cgs
index aa115b9..f77a982 100644
--- a/sim/testsuite/sim/frv/fr400/scutss.cgs
+++ b/sim/testsuite/sim/frv/fr400/scutss.cgs
@@ -12,7 +12,7 @@ scutss:
set_gr_immed 0,gr10
scutss gr10,gr11
- test_gr_limmed 0xffff,0xffe7,gr11
+ test_gr_limmed 0xffff,0xffe8,gr11
set_gr_immed 1,gr10
scutss gr10,gr11
@@ -28,7 +28,7 @@ scutss:
set_gr_immed 4,gr10
scutss gr10,gr11
- test_gr_limmed 0xffff,0xfe78,gr11
+ test_gr_limmed 0xffff,0xfe79,gr11
set_gr_immed 5,gr10
scutss gr10,gr11
@@ -40,11 +40,11 @@ scutss:
set_gr_immed 7,gr10
scutss gr10,gr11
- test_gr_limmed 0xffff,0xf3c4,gr11
+ test_gr_limmed 0xffff,0xf3c5,gr11
set_gr_immed 8,gr10
scutss gr10,gr11
- test_gr_limmed 0xffff,0xe789,gr11
+ test_gr_limmed 0xffff,0xe78a,gr11
set_gr_immed 9,gr10
scutss gr10,gr11
@@ -52,7 +52,7 @@ scutss:
set_gr_immed 10,gr10
scutss gr10,gr11
- test_gr_limmed 0xffff,0x9e26,gr11
+ test_gr_limmed 0xffff,0x9e27,gr11
set_gr_immed 11,gr10
scutss gr10,gr11
@@ -60,7 +60,7 @@ scutss:
set_gr_immed 12,gr10
scutss gr10,gr11
- test_gr_limmed 0xfffe,0x789a,gr11
+ test_gr_limmed 0xfffe,0x789b,gr11
set_gr_immed 13,gr10
scutss gr10,gr11
@@ -68,19 +68,19 @@ scutss:
set_gr_immed 14,gr10
scutss gr10,gr11
- test_gr_limmed 0xfff9,0xe26a,gr11
+ test_gr_limmed 0xfff9,0xe26b,gr11
set_gr_immed 15,gr10
scutss gr10,gr11
- test_gr_limmed 0xfff3,0xc4d5,gr11
+ test_gr_limmed 0xfff3,0xc4d6,gr11
set_gr_immed 16,gr10
scutss gr10,gr11
- test_gr_limmed 0xffe7,0x89ab,gr11
+ test_gr_limmed 0xffe7,0x89ac,gr11
set_gr_immed 17,gr10
scutss gr10,gr11
- test_gr_limmed 0xffcf,0x1357,gr11
+ test_gr_limmed 0xffcf,0x1358,gr11
set_gr_immed 18,gr10
scutss gr10,gr11
@@ -92,11 +92,11 @@ scutss:
set_gr_immed 20,gr10
scutss gr10,gr11
- test_gr_limmed 0xfe78,0x9abc,gr11
+ test_gr_limmed 0xfe78,0x9abd,gr11
set_gr_immed 21,gr10
scutss gr10,gr11
- test_gr_limmed 0xfcf1,0x3579,gr11
+ test_gr_limmed 0xfcf1,0x357a,gr11
set_gr_immed 22,gr10
scutss gr10,gr11
@@ -104,19 +104,19 @@ scutss:
set_gr_immed 23,gr10
scutss gr10,gr11
- test_gr_limmed 0xf3c4,0xd5e6,gr11
+ test_gr_limmed 0xf3c4,0xd5e7,gr11
set_gr_immed 24,gr10
scutss gr10,gr11
- test_gr_limmed 0xe789,0xabcd,gr11
+ test_gr_limmed 0xe789,0xabce,gr11
set_gr_immed 25,gr10
scutss gr10,gr11
- test_gr_limmed 0xcf13,0x579b,gr11
+ test_gr_limmed 0xcf13,0x579c,gr11
set_gr_immed 26,gr10
scutss gr10,gr11
- test_gr_limmed 0x9e26,0xaf37,gr11
+ test_gr_limmed 0x9e26,0xaf38,gr11
set_gr_immed 27,gr10
scutss gr10,gr11
@@ -268,11 +268,11 @@ scutss:
set_gr_immed 64,gr10 ; same as -64
scutss gr10,gr11
- test_gr_immed -1,gr11
+ test_gr_immed 0,gr11
set_gr_immed 128,gr10 ; same as 0
scutss gr10,gr11
- test_gr_limmed 0xffff,0xffe7,gr11
+ test_gr_limmed 0xffff,0xffe8,gr11
.global scutss2
scutss2:
@@ -281,7 +281,7 @@ scutss2:
set_gr_limmed 0xffff,0xffff,gr10 ; -1
scutss gr10,gr11
- test_gr_limmed 0xf3c4,0xd5e6,gr11
+ test_gr_limmed 0xf3c4,0xd5e7,gr11
set_gr_limmed 0x0000,0x007e,gr10 ; -2 (only lower 7 bits matter)
scutss gr10,gr11
@@ -289,11 +289,11 @@ scutss2:
set_gr_immed -3,gr10
scutss gr10,gr11
- test_gr_limmed 0xfcf1,0x3579,gr11
+ test_gr_limmed 0xfcf1,0x357a,gr11
set_gr_immed -4,gr10
scutss gr10,gr11
- test_gr_limmed 0xfe78,0x9abc,gr11
+ test_gr_limmed 0xfe78,0x9abd,gr11
set_gr_immed -5,gr10
scutss gr10,gr11
@@ -305,19 +305,19 @@ scutss2:
set_gr_immed -7,gr10
scutss gr10,gr11
- test_gr_limmed 0xffcf,0x1357,gr11
+ test_gr_limmed 0xffcf,0x1358,gr11
set_gr_immed -8,gr10
scutss gr10,gr11
- test_gr_limmed 0xffe7,0x89ab,gr11
+ test_gr_limmed 0xffe7,0x89ac,gr11
set_gr_immed -9,gr10
scutss gr10,gr11
- test_gr_limmed 0xfff3,0xc4d5,gr11
+ test_gr_limmed 0xfff3,0xc4d6,gr11
set_gr_immed -10,gr10
scutss gr10,gr11
- test_gr_limmed 0xfff9,0xe26a,gr11
+ test_gr_limmed 0xfff9,0xe26b,gr11
set_gr_immed -11,gr10
scutss gr10,gr11
@@ -325,7 +325,7 @@ scutss2:
set_gr_immed -12,gr10
scutss gr10,gr11
- test_gr_limmed 0xfffe,0x789a,gr11
+ test_gr_limmed 0xfffe,0x789b,gr11
set_gr_immed -13,gr10
scutss gr10,gr11
@@ -333,7 +333,7 @@ scutss2:
set_gr_immed -14,gr10
scutss gr10,gr11
- test_gr_limmed 0xffff,0x9e26,gr11
+ test_gr_limmed 0xffff,0x9e27,gr11
set_gr_immed -15,gr10
scutss gr10,gr11
@@ -341,11 +341,11 @@ scutss2:
set_gr_immed -16,gr10
scutss gr10,gr11
- test_gr_limmed 0xffff,0xe789,gr11
+ test_gr_limmed 0xffff,0xe78a,gr11
set_gr_immed -17,gr10
scutss gr10,gr11
- test_gr_limmed 0xffff,0xf3c4,gr11
+ test_gr_limmed 0xffff,0xf3c5,gr11
set_gr_immed -18,gr10
scutss gr10,gr11
@@ -357,7 +357,7 @@ scutss2:
set_gr_immed -20,gr10
scutss gr10,gr11
- test_gr_limmed 0xffff,0xfe78,gr11
+ test_gr_limmed 0xffff,0xfe79,gr11
set_gr_immed -21,gr10
scutss gr10,gr11
@@ -373,19 +373,19 @@ scutss2:
set_gr_immed -24,gr10
scutss gr10,gr11
- test_gr_limmed 0xffff,0xffe7,gr11
+ test_gr_limmed 0xffff,0xffe8,gr11
set_gr_immed -25,gr10
scutss gr10,gr11
- test_gr_limmed 0xffff,0xfff3,gr11
+ test_gr_limmed 0xffff,0xfff4,gr11
set_gr_immed -26,gr10
scutss gr10,gr11
- test_gr_limmed 0xffff,0xfff9,gr11
+ test_gr_limmed 0xffff,0xfffa,gr11
set_gr_immed -27,gr10
scutss gr10,gr11
- test_gr_limmed 0xffff,0xfffc,gr11
+ test_gr_limmed 0xffff,0xfffd,gr11
set_gr_immed -28,gr10
scutss gr10,gr11
@@ -397,26 +397,26 @@ scutss2:
set_gr_immed -30,gr10
scutss gr10,gr11
- test_gr_limmed 0xffff,0xffff,gr11
+ test_gr_immed 0,gr11
set_gr_immed -31,gr10
scutss gr10,gr11
- test_gr_limmed 0xffff,0xffff,gr11
+ test_gr_immed 0,gr11
set_gr_immed -32,gr10
scutss gr10,gr11
- test_gr_limmed 0xffff,0xffff,gr11
+ test_gr_immed 0,gr11
set_gr_limmed 0,64,gr10 ; same as -32
scutss gr10,gr11
- test_gr_limmed 0xffff,0xffff,gr11
+ test_gr_immed 0,gr11
set_spr_immed 0x6789abcd,iacc0h
set_spr_immed 0xefa5a5a5,iacc0l
set_gr_limmed 0xffff,0xffff,gr10
scutss gr10,gr11
- test_gr_limmed 0x33c4,0xd5e6,gr11
+ test_gr_limmed 0x33c4,0xd5e7,gr11
set_gr_limmed 0x0000,0x007e,gr10 ; -2 (only lower 7 bits matter)
scutss gr10,gr11
@@ -424,11 +424,11 @@ scutss2:
set_gr_immed -3,gr10
scutss gr10,gr11
- test_gr_limmed 0x0cf1,0x3579,gr11
+ test_gr_limmed 0x0cf1,0x357a,gr11
set_gr_immed -4,gr10
scutss gr10,gr11
- test_gr_limmed 0x0678,0x9abc,gr11
+ test_gr_limmed 0x0678,0x9abd,gr11
set_gr_immed -5,gr10
scutss gr10,gr11
@@ -440,19 +440,19 @@ scutss2:
set_gr_immed -7,gr10
scutss gr10,gr11
- test_gr_limmed 0x00cf,0x1357,gr11
+ test_gr_limmed 0x00cf,0x1358,gr11
set_gr_immed -8,gr10
scutss gr10,gr11
- test_gr_limmed 0x0067,0x89ab,gr11
+ test_gr_limmed 0x0067,0x89ac,gr11
set_gr_immed -9,gr10
scutss gr10,gr11
- test_gr_limmed 0x0033,0xc4d5,gr11
+ test_gr_limmed 0x0033,0xc4d6,gr11
set_gr_immed -10,gr10
scutss gr10,gr11
- test_gr_limmed 0x0019,0xe26a,gr11
+ test_gr_limmed 0x0019,0xe26b,gr11
set_gr_immed -11,gr10
scutss gr10,gr11
@@ -460,7 +460,7 @@ scutss2:
set_gr_immed -12,gr10
scutss gr10,gr11
- test_gr_limmed 0x0006,0x789a,gr11
+ test_gr_limmed 0x0006,0x789b,gr11
set_gr_immed -13,gr10
scutss gr10,gr11
@@ -468,7 +468,7 @@ scutss2:
set_gr_immed -14,gr10
scutss gr10,gr11
- test_gr_limmed 0x0001,0x9e26,gr11
+ test_gr_limmed 0x0001,0x9e27,gr11
set_gr_immed -15,gr10
scutss gr10,gr11
@@ -476,11 +476,11 @@ scutss2:
set_gr_immed -16,gr10
scutss gr10,gr11
- test_gr_limmed 0x0000,0x6789,gr11
+ test_gr_limmed 0x0000,0x678a,gr11
set_gr_immed -17,gr10
scutss gr10,gr11
- test_gr_limmed 0x0000,0x33c4,gr11
+ test_gr_limmed 0x0000,0x33c5,gr11
set_gr_immed -18,gr10
scutss gr10,gr11
@@ -492,7 +492,7 @@ scutss2:
set_gr_immed -20,gr10
scutss gr10,gr11
- test_gr_limmed 0x0000,0x0678,gr11
+ test_gr_limmed 0x0000,0x0679,gr11
set_gr_immed -21,gr10
scutss gr10,gr11
@@ -508,19 +508,19 @@ scutss2:
set_gr_immed -24,gr10
scutss gr10,gr11
- test_gr_limmed 0x0000,0x0067,gr11
+ test_gr_limmed 0x0000,0x0068,gr11
set_gr_immed -25,gr10
scutss gr10,gr11
- test_gr_limmed 0x0000,0x0033,gr11
+ test_gr_limmed 0x0000,0x0034,gr11
set_gr_immed -26,gr10
scutss gr10,gr11
- test_gr_limmed 0x0000,0x0019,gr11
+ test_gr_limmed 0x0000,0x001a,gr11
set_gr_immed -27,gr10
scutss gr10,gr11
- test_gr_limmed 0x0000,0x000c,gr11
+ test_gr_limmed 0x0000,0x000d,gr11
set_gr_immed -28,gr10
scutss gr10,gr11
@@ -532,11 +532,11 @@ scutss2:
set_gr_immed -30,gr10
scutss gr10,gr11
- test_gr_limmed 0x0000,0x0001,gr11
+ test_gr_limmed 0x0000,0x0002,gr11
set_gr_immed -31,gr10
scutss gr10,gr11
- test_gr_limmed 0x0000,0x0000,gr11
+ test_gr_limmed 0x0000,0x0001,gr11
set_gr_immed -32,gr10
scutss gr10,gr11
@@ -630,13 +630,35 @@ scutss2:
set_gr_limmed 0xffff,0xfffc,gr10
scutss gr10,gr11
- test_gr_limmed 0xfaf5,0xa5a5,gr11
+ test_gr_limmed 0xfaf5,0xa5a6,gr11
set_spr_immed 0x2f5a5a5a,iacc0h
set_spr_immed 0x5a5a5a5a,iacc0l
set_gr_limmed 0xffff,0xfff9,gr10
scutss gr10,gr11
- test_gr_limmed 0x005e,0xb4b4,gr11
+ test_gr_limmed 0x005e,0xb4b5,gr11
+
+# From the manual
+ .global scutss3
+scutss3:
+ set_spr_immed 0xfffffedc,iacc0h
+ set_spr_immed 0xba987654,iacc0l
+
+ set_gr_immed 16,gr10
+ scutss gr10,gr11
+ test_gr_limmed 0xfedc,0xba98,gr11
+
+ set_gr_immed 12,gr10
+ scutss gr10,gr11
+ test_gr_limmed 0xffed,0xcbaa,gr11
+
+ set_gr_immed -4,gr10
+ scutss gr10,gr11
+ test_gr_limmed 0xffff,0xffee,gr11
+
+ set_gr_immed 24,gr10
+ scutss gr10,gr11
+ test_gr_limmed 0x8000,0x0000,gr11
pass