87 lines
2.8 KiB
Diff
87 lines
2.8 KiB
Diff
From 841045c942be3fd2bf928a7de3e730a00665347e Mon Sep 17 00:00:00 2001
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From: Ben Skeggs <bskeggs@redhat.com>
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Date: Wed, 28 Apr 2010 15:19:10 +1000
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Subject: [PATCH 3/3] drm-nouveau-drm-fixed-header
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---
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drivers/gpu/drm/nouveau/drm_fixed.h | 67 +++++++++++++++++++++++++++++++++++
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1 files changed, 67 insertions(+), 0 deletions(-)
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create mode 100644 drivers/gpu/drm/nouveau/drm_fixed.h
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diff --git a/drivers/gpu/drm/nouveau/drm_fixed.h b/drivers/gpu/drm/nouveau/drm_fixed.h
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new file mode 100644
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index 0000000..4a08a66
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--- /dev/null
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+++ b/drivers/gpu/drm/nouveau/drm_fixed.h
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@@ -0,0 +1,67 @@
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+/*
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+ * Copyright 2009 Red Hat Inc.
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+ *
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+ * Permission is hereby granted, free of charge, to any person obtaining a
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+ * copy of this software and associated documentation files (the "Software"),
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+ * to deal in the Software without restriction, including without limitation
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+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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+ * and/or sell copies of the Software, and to permit persons to whom the
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+ * Software is furnished to do so, subject to the following conditions:
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+ *
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+ * The above copyright notice and this permission notice shall be included in
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+ * all copies or substantial portions of the Software.
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+ *
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+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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+ * OTHER DEALINGS IN THE SOFTWARE.
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+ *
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+ * Authors: Dave Airlie
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+ */
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+#ifndef DRM_FIXED_H
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+#define DRM_FIXED_H
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+
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+typedef union dfixed {
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+ u32 full;
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+} fixed20_12;
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+
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+
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+#define dfixed_const(A) (u32)(((A) << 12))/* + ((B + 0.000122)*4096)) */
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+#define dfixed_const_half(A) (u32)(((A) << 12) + 2048)
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+#define dfixed_const_666(A) (u32)(((A) << 12) + 2731)
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+#define dfixed_const_8(A) (u32)(((A) << 12) + 3277)
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+#define dfixed_mul(A, B) ((u64)((u64)(A).full * (B).full + 2048) >> 12)
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+#define dfixed_init(A) { .full = dfixed_const((A)) }
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+#define dfixed_init_half(A) { .full = dfixed_const_half((A)) }
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+#define dfixed_trunc(A) ((A).full >> 12)
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+
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+static inline u32 dfixed_floor(fixed20_12 A)
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+{
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+ u32 non_frac = dfixed_trunc(A);
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+
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+ return dfixed_const(non_frac);
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+}
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+
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+static inline u32 dfixed_ceil(fixed20_12 A)
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+{
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+ u32 non_frac = dfixed_trunc(A);
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+
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+ if (A.full > dfixed_const(non_frac))
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+ return dfixed_const(non_frac + 1);
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+ else
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+ return dfixed_const(non_frac);
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+}
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+
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+static inline u32 dfixed_div(fixed20_12 A, fixed20_12 B)
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+{
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+ u64 tmp = ((u64)A.full << 13);
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+
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+ do_div(tmp, B.full);
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+ tmp += 1;
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+ tmp /= 2;
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+ return lower_32_bits(tmp);
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+}
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+#endif
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--
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1.7.1
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