--- /dev/null
+/* Copyright (C) 2005 Analog Devices
+ Author: Jean-Marc Valin */
+/**
+ @file fixed_bfin.h
+ @brief Blackfin fixed-point operations
+*/
+/*
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+
+ - Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+
+ - Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+
+ - Neither the name of the Xiph.org Foundation nor the names of its
+ contributors may be used to endorse or promote products derived from
+ this software without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
+ CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef FIXED_BFIN_H
+#define FIXED_BFIN_H
+
+#include "bfin.h"
+
+#undef PDIV32_16
+static inline spx_word16_t PDIV32_16(spx_word32_t a, spx_word16_t b)
+{
+ spx_word32_t res, bb;
+ bb = b;
+ a += b>>1;
+ __asm__ (
+ "P0 = 15;\n\t"
+ "R0 = %1;\n\t"
+ "R1 = %2;\n\t"
+ //"R0 = R0 + R1;\n\t"
+ "R0 <<= 1;\n\t"
+ "DIVS (R0, R1);\n\t"
+ "LOOP divide%= LC0 = P0;\n\t"
+ "LOOP_BEGIN divide%=;\n\t"
+ "DIVQ (R0, R1);\n\t"
+ "LOOP_END divide%=;\n\t"
+ "R0 = R0.L;\n\t"
+ "%0 = R0;\n\t"
+ : "=m" (res)
+ : "m" (a), "m" (bb)
+ : "P0", "R0", "R1", "ASTAT" BFIN_HWLOOP0_REGS);
+ return res;
+}
+
+#undef DIV32_16
+static inline spx_word16_t DIV32_16(spx_word32_t a, spx_word16_t b)
+{
+ spx_word32_t res, bb;
+ bb = b;
+ /* Make the roundinf consistent with the C version
+ (do we need to do that?)*/
+ if (a<0)
+ a += (b-1);
+ __asm__ (
+ "P0 = 15;\n\t"
+ "R0 = %1;\n\t"
+ "R1 = %2;\n\t"
+ "R0 <<= 1;\n\t"
+ "DIVS (R0, R1);\n\t"
+ "LOOP divide%= LC0 = P0;\n\t"
+ "LOOP_BEGIN divide%=;\n\t"
+ "DIVQ (R0, R1);\n\t"
+ "LOOP_END divide%=;\n\t"
+ "R0 = R0.L;\n\t"
+ "%0 = R0;\n\t"
+ : "=m" (res)
+ : "m" (a), "m" (bb)
+ : "P0", "R0", "R1", "ASTAT" BFIN_HWLOOP0_REGS);
+ return res;
+}
+
+#undef MAX16
+static inline spx_word16_t MAX16(spx_word16_t a, spx_word16_t b)
+{
+ spx_word32_t res;
+ __asm__ (
+ "%1 = %1.L (X);\n\t"
+ "%2 = %2.L (X);\n\t"
+ "%0 = MAX(%1,%2);"
+ : "=d" (res)
+ : "%d" (a), "d" (b)
+ : "ASTAT"
+ );
+ return res;
+}
+
+#undef MULT16_32_Q15
+static inline spx_word32_t MULT16_32_Q15(spx_word16_t a, spx_word32_t b)
+{
+ spx_word32_t res;
+ __asm__
+ (
+ "A1 = %2.L*%1.L (M);\n\t"
+ "A1 = A1 >>> 15;\n\t"
+ "%0 = (A1 += %2.L*%1.H) ;\n\t"
+ : "=&W" (res), "=&d" (b)
+ : "d" (a), "1" (b)
+ : "A1", "ASTAT"
+ );
+ return res;
+}
+
+#undef MAC16_32_Q15
+static inline spx_word32_t MAC16_32_Q15(spx_word32_t c, spx_word16_t a, spx_word32_t b)
+{
+ spx_word32_t res;
+ __asm__
+ (
+ "A1 = %2.L*%1.L (M);\n\t"
+ "A1 = A1 >>> 15;\n\t"
+ "%0 = (A1 += %2.L*%1.H);\n\t"
+ "%0 = %0 + %4;\n\t"
+ : "=&W" (res), "=&d" (b)
+ : "d" (a), "1" (b), "d" (c)
+ : "A1", "ASTAT"
+ );
+ return res;
+}
+
+#undef MULT16_32_Q14
+static inline spx_word32_t MULT16_32_Q14(spx_word16_t a, spx_word32_t b)
+{
+ spx_word32_t res;
+ __asm__
+ (
+ "%2 <<= 1;\n\t"
+ "A1 = %1.L*%2.L (M);\n\t"
+ "A1 = A1 >>> 15;\n\t"
+ "%0 = (A1 += %1.L*%2.H);\n\t"
+ : "=W" (res), "=d" (a), "=d" (b)
+ : "1" (a), "2" (b)
+ : "A1", "ASTAT"
+ );
+ return res;
+}
+
+#undef MAC16_32_Q14
+static inline spx_word32_t MAC16_32_Q14(spx_word32_t c, spx_word16_t a, spx_word32_t b)
+{
+ spx_word32_t res;
+ __asm__
+ (
+ "%1 <<= 1;\n\t"
+ "A1 = %2.L*%1.L (M);\n\t"
+ "A1 = A1 >>> 15;\n\t"
+ "%0 = (A1 += %2.L*%1.H);\n\t"
+ "%0 = %0 + %4;\n\t"
+ : "=&W" (res), "=&d" (b)
+ : "d" (a), "1" (b), "d" (c)
+ : "A1", "ASTAT"
+ );
+ return res;
+}
+
+#endif
projects / mafwsubrenderer / blobdiff