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-rw-r--r--target-mips/dsp_helper.c1063
1 files changed, 1063 insertions, 0 deletions
diff --git a/target-mips/dsp_helper.c b/target-mips/dsp_helper.c
new file mode 100644
index 0000000000..55ea9236fa
--- /dev/null
+++ b/target-mips/dsp_helper.c
@@ -0,0 +1,1063 @@
+/*
+ * MIPS ASE DSP Instruction emulation helpers for QEMU.
+ *
+ * Copyright (c) 2012 Jia Liu <proljc@gmail.com>
+ * Dongxue Zhang <elat.era@gmail.com>
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "cpu.h"
+#include "helper.h"
+
+/*** MIPS DSP internal functions begin ***/
+#define MIPSDSP_ABS(x) (((x) >= 0) ? x : -x)
+#define MIPSDSP_OVERFLOW(a, b, c, d) (!(!((a ^ b ^ -1) & (a ^ c) & d)))
+
+static inline void set_DSPControl_overflow_flag(uint32_t flag, int position,
+ CPUMIPSState *env)
+{
+ env->active_tc.DSPControl |= (target_ulong)flag << position;
+}
+
+static inline void set_DSPControl_carryflag(uint32_t flag, CPUMIPSState *env)
+{
+ env->active_tc.DSPControl |= (target_ulong)flag << 13;
+}
+
+static inline uint32_t get_DSPControl_carryflag(CPUMIPSState *env)
+{
+ return (env->active_tc.DSPControl >> 13) & 0x01;
+}
+
+static inline void set_DSPControl_24(uint32_t flag, int len, CPUMIPSState *env)
+{
+ uint32_t filter;
+
+ filter = ((0x01 << len) - 1) << 24;
+ filter = ~filter;
+
+ env->active_tc.DSPControl &= filter;
+ env->active_tc.DSPControl |= (target_ulong)flag << 24;
+}
+
+static inline uint32_t get_DSPControl_24(int len, CPUMIPSState *env)
+{
+ uint32_t filter;
+
+ filter = (0x01 << len) - 1;
+
+ return (env->active_tc.DSPControl >> 24) & filter;
+}
+
+static inline void set_DSPControl_pos(uint32_t pos, CPUMIPSState *env)
+{
+ target_ulong dspc;
+
+ dspc = env->active_tc.DSPControl;
+#ifndef TARGET_MIPS64
+ dspc = dspc & 0xFFFFFFC0;
+ dspc |= pos;
+#else
+ dspc = dspc & 0xFFFFFF80;
+ dspc |= pos;
+#endif
+ env->active_tc.DSPControl = dspc;
+}
+
+static inline uint32_t get_DSPControl_pos(CPUMIPSState *env)
+{
+ target_ulong dspc;
+ uint32_t pos;
+
+ dspc = env->active_tc.DSPControl;
+
+#ifndef TARGET_MIPS64
+ pos = dspc & 0x3F;
+#else
+ pos = dspc & 0x7F;
+#endif
+
+ return pos;
+}
+
+static inline void set_DSPControl_efi(uint32_t flag, CPUMIPSState *env)
+{
+ env->active_tc.DSPControl &= 0xFFFFBFFF;
+ env->active_tc.DSPControl |= (target_ulong)flag << 14;
+}
+
+#define DO_MIPS_SAT_ABS(size) \
+static inline int##size##_t mipsdsp_sat_abs##size(int##size##_t a, \
+ CPUMIPSState *env) \
+{ \
+ if (a == INT##size##_MIN) { \
+ set_DSPControl_overflow_flag(1, 20, env); \
+ return INT##size##_MAX; \
+ } else { \
+ return MIPSDSP_ABS(a); \
+ } \
+}
+DO_MIPS_SAT_ABS(8)
+DO_MIPS_SAT_ABS(16)
+DO_MIPS_SAT_ABS(32)
+#undef DO_MIPS_SAT_ABS
+
+/* get sum value */
+static inline int16_t mipsdsp_add_i16(int16_t a, int16_t b, CPUMIPSState *env)
+{
+ int16_t tempI;
+
+ tempI = a + b;
+
+ if (MIPSDSP_OVERFLOW(a, b, tempI, 0x8000)) {
+ set_DSPControl_overflow_flag(1, 20, env);
+ }
+
+ return tempI;
+}
+
+static inline int16_t mipsdsp_sat_add_i16(int16_t a, int16_t b,
+ CPUMIPSState *env)
+{
+ int16_t tempS;
+
+ tempS = a + b;
+
+ if (MIPSDSP_OVERFLOW(a, b, tempS, 0x8000)) {
+ if (a > 0) {
+ tempS = 0x7FFF;
+ } else {
+ tempS = 0x8000;
+ }
+ set_DSPControl_overflow_flag(1, 20, env);
+ }
+
+ return tempS;
+}
+
+static inline int32_t mipsdsp_sat_add_i32(int32_t a, int32_t b,
+ CPUMIPSState *env)
+{
+ int32_t tempI;
+
+ tempI = a + b;
+
+ if (MIPSDSP_OVERFLOW(a, b, tempI, 0x80000000)) {
+ if (a > 0) {
+ tempI = 0x7FFFFFFF;
+ } else {
+ tempI = 0x80000000;
+ }
+ set_DSPControl_overflow_flag(1, 20, env);
+ }
+
+ return tempI;
+}
+
+static inline uint8_t mipsdsp_add_u8(uint8_t a, uint8_t b, CPUMIPSState *env)
+{
+ uint16_t temp;
+
+ temp = (uint16_t)a + (uint16_t)b;
+
+ if (temp & 0x0100) {
+ set_DSPControl_overflow_flag(1, 20, env);
+ }
+
+ return temp & 0xFF;
+}
+
+static inline uint16_t mipsdsp_add_u16(uint16_t a, uint16_t b,
+ CPUMIPSState *env)
+{
+ uint32_t temp;
+
+ temp = (uint32_t)a + (uint32_t)b;
+
+ if (temp & 0x00010000) {
+ set_DSPControl_overflow_flag(1, 20, env);
+ }
+
+ return temp & 0xFFFF;
+}
+
+static inline uint8_t mipsdsp_sat_add_u8(uint8_t a, uint8_t b,
+ CPUMIPSState *env)
+{
+ uint8_t result;
+ uint16_t temp;
+
+ temp = (uint16_t)a + (uint16_t)b;
+ result = temp & 0xFF;
+
+ if (0x0100 & temp) {
+ result = 0xFF;
+ set_DSPControl_overflow_flag(1, 20, env);
+ }
+
+ return result;
+}
+
+static inline uint16_t mipsdsp_sat_add_u16(uint16_t a, uint16_t b,
+ CPUMIPSState *env)
+{
+ uint16_t result;
+ uint32_t temp;
+
+ temp = (uint32_t)a + (uint32_t)b;
+ result = temp & 0xFFFF;
+
+ if (0x00010000 & temp) {
+ result = 0xFFFF;
+ set_DSPControl_overflow_flag(1, 20, env);
+ }
+
+ return result;
+}
+
+static inline int32_t mipsdsp_sat32_acc_q31(int32_t acc, int32_t a,
+ CPUMIPSState *env)
+{
+ int64_t temp;
+ int32_t temp32, temp31, result;
+ int64_t temp_sum;
+
+#ifndef TARGET_MIPS64
+ temp = ((uint64_t)env->active_tc.HI[acc] << 32) |
+ (uint64_t)env->active_tc.LO[acc];
+#else
+ temp = (uint64_t)env->active_tc.LO[acc];
+#endif
+
+ temp_sum = (int64_t)a + temp;
+
+ temp32 = (temp_sum >> 32) & 0x01;
+ temp31 = (temp_sum >> 31) & 0x01;
+ result = temp_sum & 0xFFFFFFFF;
+
+ /* FIXME
+ This sat function may wrong, because user manual wrote:
+ temp127..0 ← temp + ( (signA) || a31..0
+ if ( temp32 ≠ temp31 ) then
+ if ( temp32 = 0 ) then
+ temp31..0 ← 0x80000000
+ else
+ temp31..0 ← 0x7FFFFFFF
+ endif
+ DSPControlouflag:16+acc ← 1
+ endif
+ */
+ if (temp32 != temp31) {
+ if (temp32 == 0) {
+ result = 0x7FFFFFFF;
+ } else {
+ result = 0x80000000;
+ }
+ set_DSPControl_overflow_flag(1, 16 + acc, env);
+ }
+
+ return result;
+}
+
+/* a[0] is LO, a[1] is HI. */
+static inline void mipsdsp_sat64_acc_add_q63(int64_t *ret,
+ int32_t ac,
+ int64_t *a,
+ CPUMIPSState *env)
+{
+ bool temp64;
+
+ ret[0] = env->active_tc.LO[ac] + a[0];
+ ret[1] = env->active_tc.HI[ac] + a[1];
+
+ if (((uint64_t)ret[0] < (uint64_t)env->active_tc.LO[ac]) &&
+ ((uint64_t)ret[0] < (uint64_t)a[0])) {
+ ret[1] += 1;
+ }
+ temp64 = ret[1] & 1;
+ if (temp64 != ((ret[0] >> 63) & 0x01)) {
+ if (temp64) {
+ ret[0] = (0x01ull << 63);
+ ret[1] = ~0ull;
+ } else {
+ ret[0] = (0x01ull << 63) - 1;
+ ret[1] = 0x00;
+ }
+ set_DSPControl_overflow_flag(1, 16 + ac, env);
+ }
+}
+
+static inline void mipsdsp_sat64_acc_sub_q63(int64_t *ret,
+ int32_t ac,
+ int64_t *a,
+ CPUMIPSState *env)
+{
+ bool temp64;
+
+ ret[0] = env->active_tc.LO[ac] - a[0];
+ ret[1] = env->active_tc.HI[ac] - a[1];
+
+ if ((uint64_t)ret[0] > (uint64_t)env->active_tc.LO[ac]) {
+ ret[1] -= 1;
+ }
+ temp64 = ret[1] & 1;
+ if (temp64 != ((ret[0] >> 63) & 0x01)) {
+ if (temp64) {
+ ret[0] = (0x01ull << 63);
+ ret[1] = ~0ull;
+ } else {
+ ret[0] = (0x01ull << 63) - 1;
+ ret[1] = 0x00;
+ }
+ set_DSPControl_overflow_flag(1, 16 + ac, env);
+ }
+}
+
+static inline int32_t mipsdsp_mul_i16_i16(int16_t a, int16_t b,
+ CPUMIPSState *env)
+{
+ int32_t temp;
+
+ temp = (int32_t)a * (int32_t)b;
+
+ if ((temp > (int)0x7FFF) || (temp < (int)0xFFFF8000)) {
+ set_DSPControl_overflow_flag(1, 21, env);
+ }
+ temp &= 0x0000FFFF;
+
+ return temp;
+}
+
+static inline int32_t mipsdsp_mul_u16_u16(int32_t a, int32_t b)
+{
+ return a * b;
+}
+
+static inline int32_t mipsdsp_mul_i32_i32(int32_t a, int32_t b)
+{
+ return a * b;
+}
+
+static inline int32_t mipsdsp_sat16_mul_i16_i16(int16_t a, int16_t b,
+ CPUMIPSState *env)
+{
+ int32_t temp;
+
+ temp = (int32_t)a * (int32_t)b;
+
+ if (temp > (int)0x7FFF) {
+ temp = 0x00007FFF;
+ set_DSPControl_overflow_flag(1, 21, env);
+ } else if (temp < (int)0xffff8000) {
+ temp = 0xFFFF8000;
+ set_DSPControl_overflow_flag(1, 21, env);
+ }
+ temp &= 0x0000FFFF;
+
+ return temp;
+}
+
+static inline int32_t mipsdsp_mul_q15_q15_overflowflag21(uint16_t a, uint16_t b,
+ CPUMIPSState *env)
+{
+ int32_t temp;
+
+ if ((a == 0x8000) && (b == 0x8000)) {
+ temp = 0x7FFFFFFF;
+ set_DSPControl_overflow_flag(1, 21, env);
+ } else {
+ temp = ((int32_t)(int16_t)a * (int32_t)(int16_t)b) << 1;
+ }
+
+ return temp;
+}
+
+/* right shift */
+static inline uint8_t mipsdsp_rshift_u8(uint8_t a, target_ulong mov)
+{
+ return a >> mov;
+}
+
+static inline uint16_t mipsdsp_rshift_u16(uint16_t a, target_ulong mov)
+{
+ return a >> mov;
+}
+
+static inline int8_t mipsdsp_rashift8(int8_t a, target_ulong mov)
+{
+ return a >> mov;
+}
+
+static inline int16_t mipsdsp_rashift16(int16_t a, target_ulong mov)
+{
+ return a >> mov;
+}
+
+static inline int32_t mipsdsp_rashift32(int32_t a, target_ulong mov)
+{
+ return a >> mov;
+}
+
+static inline int16_t mipsdsp_rshift1_add_q16(int16_t a, int16_t b)
+{
+ int32_t temp;
+
+ temp = (int32_t)a + (int32_t)b;
+
+ return (temp >> 1) & 0xFFFF;
+}
+
+/* round right shift */
+static inline int16_t mipsdsp_rrshift1_add_q16(int16_t a, int16_t b)
+{
+ int32_t temp;
+
+ temp = (int32_t)a + (int32_t)b;
+ temp += 1;
+
+ return (temp >> 1) & 0xFFFF;
+}
+
+static inline int32_t mipsdsp_rshift1_add_q32(int32_t a, int32_t b)
+{
+ int64_t temp;
+
+ temp = (int64_t)a + (int64_t)b;
+
+ return (temp >> 1) & 0xFFFFFFFF;
+}
+
+static inline int32_t mipsdsp_rrshift1_add_q32(int32_t a, int32_t b)
+{
+ int64_t temp;
+
+ temp = (int64_t)a + (int64_t)b;
+ temp += 1;
+
+ return (temp >> 1) & 0xFFFFFFFF;
+}
+
+static inline uint8_t mipsdsp_rshift1_add_u8(uint8_t a, uint8_t b)
+{
+ uint16_t temp;
+
+ temp = (uint16_t)a + (uint16_t)b;
+
+ return (temp >> 1) & 0x00FF;
+}
+
+static inline uint8_t mipsdsp_rrshift1_add_u8(uint8_t a, uint8_t b)
+{
+ uint16_t temp;
+
+ temp = (uint16_t)a + (uint16_t)b + 1;
+
+ return (temp >> 1) & 0x00FF;
+}
+
+static inline uint8_t mipsdsp_rshift1_sub_u8(uint8_t a, uint8_t b)
+{
+ uint16_t temp;
+
+ temp = (uint16_t)a - (uint16_t)b;
+
+ return (temp >> 1) & 0x00FF;
+}
+
+static inline uint8_t mipsdsp_rrshift1_sub_u8(uint8_t a, uint8_t b)
+{
+ uint16_t temp;
+
+ temp = (uint16_t)a - (uint16_t)b + 1;
+
+ return (temp >> 1) & 0x00FF;
+}
+
+static inline int64_t mipsdsp_rashift_short_acc(int32_t ac,
+ int32_t shift,
+ CPUMIPSState *env)
+{
+ int32_t sign, temp31;
+ int64_t temp, acc;
+
+ sign = (env->active_tc.HI[ac] >> 31) & 0x01;
+ acc = ((int64_t)env->active_tc.HI[ac] << 32) |
+ ((int64_t)env->active_tc.LO[ac] & 0xFFFFFFFF);
+ if (shift == 0) {
+ temp = acc;
+ } else {
+ if (sign == 0) {
+ temp = (((int64_t)0x01 << (32 - shift + 1)) - 1) & (acc >> shift);
+ } else {
+ temp = ((((int64_t)0x01 << (shift + 1)) - 1) << (32 - shift)) |
+ (acc >> shift);
+ }
+ }
+
+ temp31 = (temp >> 31) & 0x01;
+ if (sign != temp31) {
+ set_DSPControl_overflow_flag(1, 23, env);
+ }
+
+ return temp;
+}
+
+/* 128 bits long. p[0] is LO, p[1] is HI. */
+static inline void mipsdsp_rndrashift_short_acc(int64_t *p,
+ int32_t ac,
+ int32_t shift,
+ CPUMIPSState *env)
+{
+ int64_t acc;
+
+ acc = ((int64_t)env->active_tc.HI[ac] << 32) |
+ ((int64_t)env->active_tc.LO[ac] & 0xFFFFFFFF);
+ if (shift == 0) {
+ p[0] = acc << 1;
+ p[1] = (acc >> 63) & 0x01;
+ } else {
+ p[0] = acc >> (shift - 1);
+ p[1] = 0;
+ }
+}
+
+/* 128 bits long. p[0] is LO, p[1] is HI */
+static inline void mipsdsp_rashift_acc(uint64_t *p,
+ uint32_t ac,
+ uint32_t shift,
+ CPUMIPSState *env)
+{
+ uint64_t tempB, tempA;
+
+ tempB = env->active_tc.HI[ac];
+ tempA = env->active_tc.LO[ac];
+ shift = shift & 0x1F;
+
+ if (shift == 0) {
+ p[1] = tempB;
+ p[0] = tempA;
+ } else {
+ p[0] = (tempB << (64 - shift)) | (tempA >> shift);
+ p[1] = (int64_t)tempB >> shift;
+ }
+}
+
+/* 128 bits long. p[0] is LO, p[1] is HI , p[2] is sign of HI.*/
+static inline void mipsdsp_rndrashift_acc(uint64_t *p,
+ uint32_t ac,
+ uint32_t shift,
+ CPUMIPSState *env)
+{
+ int64_t tempB, tempA;
+
+ tempB = env->active_tc.HI[ac];
+ tempA = env->active_tc.LO[ac];
+ shift = shift & 0x3F;
+
+ if (shift == 0) {
+ p[2] = tempB >> 63;
+ p[1] = (tempB << 1) | (tempA >> 63);
+ p[0] = tempA << 1;
+ } else {
+ p[0] = (tempB << (65 - shift)) | (tempA >> (shift - 1));
+ p[1] = (int64_t)tempB >> (shift - 1);
+ if (tempB >= 0) {
+ p[2] = 0x0;
+ } else {
+ p[2] = ~0ull;
+ }
+ }
+}
+
+static inline int32_t mipsdsp_mul_q15_q15(int32_t ac, uint16_t a, uint16_t b,
+ CPUMIPSState *env)
+{
+ int32_t temp;
+
+ if ((a == 0x8000) && (b == 0x8000)) {
+ temp = 0x7FFFFFFF;
+ set_DSPControl_overflow_flag(1, 16 + ac, env);
+ } else {
+ temp = ((uint32_t)a * (uint32_t)b) << 1;
+ }
+
+ return temp;
+}
+
+static inline int64_t mipsdsp_mul_q31_q31(int32_t ac, uint32_t a, uint32_t b,
+ CPUMIPSState *env)
+{
+ uint64_t temp;
+
+ if ((a == 0x80000000) && (b == 0x80000000)) {
+ temp = (0x01ull << 63) - 1;
+ set_DSPControl_overflow_flag(1, 16 + ac, env);
+ } else {
+ temp = ((uint64_t)a * (uint64_t)b) << 1;
+ }
+
+ return temp;
+}
+
+static inline uint16_t mipsdsp_mul_u8_u8(uint8_t a, uint8_t b)
+{
+ return (uint16_t)a * (uint16_t)b;
+}
+
+static inline uint16_t mipsdsp_mul_u8_u16(uint8_t a, uint16_t b,
+ CPUMIPSState *env)
+{
+ uint32_t tempI;
+
+ tempI = (uint32_t)a * (uint32_t)b;
+ if (tempI > 0x0000FFFF) {
+ tempI = 0x0000FFFF;
+ set_DSPControl_overflow_flag(1, 21, env);
+ }
+
+ return tempI & 0x0000FFFF;
+}
+
+static inline uint64_t mipsdsp_mul_u32_u32(uint32_t a, uint32_t b)
+{
+ return (uint64_t)a * (uint64_t)b;
+}
+
+static inline int16_t mipsdsp_rndq15_mul_q15_q15(uint16_t a, uint16_t b,
+ CPUMIPSState *env)
+{
+ uint32_t temp;
+
+ if ((a == 0x8000) && (b == 0x8000)) {
+ temp = 0x7FFF0000;
+ set_DSPControl_overflow_flag(1, 21, env);
+ } else {
+ temp = (a * b) << 1;
+ temp = temp + 0x00008000;
+ }
+
+ return (temp & 0xFFFF0000) >> 16;
+}
+
+static inline int32_t mipsdsp_sat16_mul_q15_q15(uint16_t a, uint16_t b,
+ CPUMIPSState *env)
+{
+ int32_t temp;
+
+ if ((a == 0x8000) && (b == 0x8000)) {
+ temp = 0x7FFF0000;
+ set_DSPControl_overflow_flag(1, 21, env);
+ } else {
+ temp = ((uint32_t)a * (uint32_t)b);
+ temp = temp << 1;
+ }
+
+ return (temp >> 16) & 0x0000FFFF;
+}
+
+static inline uint16_t mipsdsp_trunc16_sat16_round(int32_t a,
+ CPUMIPSState *env)
+{
+ int64_t temp;
+
+ temp = (int32_t)a + 0x00008000;
+
+ if (a > (int)0x7fff8000) {
+ temp = 0x7FFFFFFF;
+ set_DSPControl_overflow_flag(1, 22, env);
+ }
+
+ return (temp >> 16) & 0xFFFF;
+}
+
+static inline uint8_t mipsdsp_sat8_reduce_precision(uint16_t a,
+ CPUMIPSState *env)
+{
+ uint16_t mag;
+ uint32_t sign;
+
+ sign = (a >> 15) & 0x01;
+ mag = a & 0x7FFF;
+
+ if (sign == 0) {
+ if (mag > 0x7F80) {
+ set_DSPControl_overflow_flag(1, 22, env);
+ return 0xFF;
+ } else {
+ return (mag >> 7) & 0xFFFF;
+ }
+ } else {
+ set_DSPControl_overflow_flag(1, 22, env);
+ return 0x00;
+ }
+}
+
+static inline uint8_t mipsdsp_lshift8(uint8_t a, uint8_t s, CPUMIPSState *env)
+{
+ uint8_t sign;
+ uint8_t discard;
+
+ if (s == 0) {
+ return a;
+ } else {
+ sign = (a >> 7) & 0x01;
+ if (sign != 0) {
+ discard = (((0x01 << (8 - s)) - 1) << s) |
+ ((a >> (6 - (s - 1))) & ((0x01 << s) - 1));
+ } else {
+ discard = a >> (6 - (s - 1));
+ }
+
+ if (discard != 0x00) {
+ set_DSPControl_overflow_flag(1, 22, env);
+ }
+ return a << s;
+ }
+}
+
+static inline uint16_t mipsdsp_lshift16(uint16_t a, uint8_t s,
+ CPUMIPSState *env)
+{
+ uint8_t sign;
+ uint16_t discard;
+
+ if (s == 0) {
+ return a;
+ } else {
+ sign = (a >> 15) & 0x01;
+ if (sign != 0) {
+ discard = (((0x01 << (16 - s)) - 1) << s) |
+ ((a >> (14 - (s - 1))) & ((0x01 << s) - 1));
+ } else {
+ discard = a >> (14 - (s - 1));
+ }
+
+ if ((discard != 0x0000) && (discard != 0xFFFF)) {
+ set_DSPControl_overflow_flag(1, 22, env);
+ }
+ return a << s;
+ }
+}
+
+
+static inline uint32_t mipsdsp_lshift32(uint32_t a, uint8_t s,
+ CPUMIPSState *env)
+{
+ uint32_t discard;
+
+ if (s == 0) {
+ return a;
+ } else {
+ discard = (int32_t)a >> (31 - (s - 1));
+
+ if ((discard != 0x00000000) && (discard != 0xFFFFFFFF)) {
+ set_DSPControl_overflow_flag(1, 22, env);
+ }
+ return a << s;
+ }
+}
+
+static inline uint16_t mipsdsp_sat16_lshift(uint16_t a, uint8_t s,
+ CPUMIPSState *env)
+{
+ uint8_t sign;
+ uint16_t discard;
+
+ if (s == 0) {
+ return a;
+ } else {
+ sign = (a >> 15) & 0x01;
+ if (sign != 0) {
+ discard = (((0x01 << (16 - s)) - 1) << s) |
+ ((a >> (14 - (s - 1))) & ((0x01 << s) - 1));
+ } else {
+ discard = a >> (14 - (s - 1));
+ }
+
+ if ((discard != 0x0000) && (discard != 0xFFFF)) {
+ set_DSPControl_overflow_flag(1, 22, env);
+ return (sign == 0) ? 0x7FFF : 0x8000;
+ } else {
+ return a << s;
+ }
+ }
+}
+
+static inline uint32_t mipsdsp_sat32_lshift(uint32_t a, uint8_t s,
+ CPUMIPSState *env)
+{
+ uint8_t sign;
+ uint32_t discard;
+
+ if (s == 0) {
+ return a;
+ } else {
+ sign = (a >> 31) & 0x01;
+ if (sign != 0) {
+ discard = (((0x01 << (32 - s)) - 1) << s) |
+ ((a >> (30 - (s - 1))) & ((0x01 << s) - 1));
+ } else {
+ discard = a >> (30 - (s - 1));
+ }
+
+ if ((discard != 0x00000000) && (discard != 0xFFFFFFFF)) {
+ set_DSPControl_overflow_flag(1, 22, env);
+ return (sign == 0) ? 0x7FFFFFFF : 0x80000000;
+ } else {
+ return a << s;
+ }
+ }
+}
+
+static inline uint8_t mipsdsp_rnd8_rashift(uint8_t a, uint8_t s)
+{
+ uint32_t temp;
+
+ if (s == 0) {
+ temp = (uint32_t)a << 1;
+ } else {
+ temp = (int32_t)(int8_t)a >> (s - 1);
+ }
+
+ return (temp + 1) >> 1;
+}
+
+static inline uint16_t mipsdsp_rnd16_rashift(uint16_t a, uint8_t s)
+{
+ uint32_t temp;
+
+ if (s == 0) {
+ temp = (uint32_t)a << 1;
+ } else {
+ temp = (int32_t)(int16_t)a >> (s - 1);
+ }
+
+ return (temp + 1) >> 1;
+}
+
+static inline uint32_t mipsdsp_rnd32_rashift(uint32_t a, uint8_t s)
+{
+ int64_t temp;
+
+ if (s == 0) {
+ temp = (uint64_t)a << 1;
+ } else {
+ temp = (int64_t)(int32_t)a >> (s - 1);
+ }
+ temp += 1;
+
+ return (temp >> 1) & 0xFFFFFFFFull;
+}
+
+static inline uint16_t mipsdsp_sub_i16(int16_t a, int16_t b, CPUMIPSState *env)
+{
+ int16_t temp;
+
+ temp = a - b;
+ if (MIPSDSP_OVERFLOW(a, -b, temp, 0x8000)) {
+ set_DSPControl_overflow_flag(1, 20, env);
+ }
+
+ return temp;
+}
+
+static inline uint16_t mipsdsp_sat16_sub(int16_t a, int16_t b,
+ CPUMIPSState *env)
+{
+ int16_t temp;
+
+ temp = a - b;
+ if (MIPSDSP_OVERFLOW(a, -b, temp, 0x8000)) {
+ if (a > 0) {
+ temp = 0x7FFF;
+ } else {
+ temp = 0x8000;
+ }
+ set_DSPControl_overflow_flag(1, 20, env);
+ }
+
+ return temp;
+}
+
+static inline uint32_t mipsdsp_sat32_sub(int32_t a, int32_t b,
+ CPUMIPSState *env)
+{
+ int32_t temp;
+
+ temp = a - b;
+ if (MIPSDSP_OVERFLOW(a, -b, temp, 0x80000000)) {
+ if (a > 0) {
+ temp = 0x7FFFFFFF;
+ } else {
+ temp = 0x80000000;
+ }
+ set_DSPControl_overflow_flag(1, 20, env);
+ }
+
+ return temp & 0xFFFFFFFFull;
+}
+
+static inline uint16_t mipsdsp_rshift1_sub_q16(int16_t a, int16_t b)
+{
+ int32_t temp;
+
+ temp = (int32_t)a - (int32_t)b;
+
+ return (temp >> 1) & 0x0000FFFF;
+}
+
+static inline uint16_t mipsdsp_rrshift1_sub_q16(int16_t a, int16_t b)
+{
+ int32_t temp;
+
+ temp = (int32_t)a - (int32_t)b;
+ temp += 1;
+
+ return (temp >> 1) & 0x0000FFFF;
+}
+
+static inline uint32_t mipsdsp_rshift1_sub_q32(int32_t a, int32_t b)
+{
+ int64_t temp;
+
+ temp = (int64_t)a - (int64_t)b;
+
+ return (temp >> 1) & 0xFFFFFFFFull;
+}
+
+static inline uint32_t mipsdsp_rrshift1_sub_q32(int32_t a, int32_t b)
+{
+ int64_t temp;
+
+ temp = (int64_t)a - (int64_t)b;
+ temp += 1;
+
+ return (temp >> 1) & 0xFFFFFFFFull;
+}
+
+static inline uint16_t mipsdsp_sub_u16_u16(uint16_t a, uint16_t b,
+ CPUMIPSState *env)
+{
+ uint8_t temp16;
+ uint32_t temp;
+
+ temp = (uint32_t)a - (uint32_t)b;
+ temp16 = (temp >> 16) & 0x01;
+ if (temp16 == 1) {
+ set_DSPControl_overflow_flag(1, 20, env);
+ }
+ return temp & 0x0000FFFF;
+}
+
+static inline uint16_t mipsdsp_satu16_sub_u16_u16(uint16_t a, uint16_t b,
+ CPUMIPSState *env)
+{
+ uint8_t temp16;
+ uint32_t temp;
+
+ temp = (uint32_t)a - (uint32_t)b;
+ temp16 = (temp >> 16) & 0x01;
+
+ if (temp16 == 1) {
+ temp = 0x0000;
+ set_DSPControl_overflow_flag(1, 20, env);
+ }
+
+ return temp & 0x0000FFFF;
+}
+
+static inline uint8_t mipsdsp_sub_u8(uint8_t a, uint8_t b, CPUMIPSState *env)
+{
+ uint8_t temp8;
+ uint16_t temp;
+
+ temp = (uint16_t)a - (uint16_t)b;
+ temp8 = (temp >> 8) & 0x01;
+ if (temp8 == 1) {
+ set_DSPControl_overflow_flag(1, 20, env);
+ }
+
+ return temp & 0x00FF;
+}
+
+static inline uint8_t mipsdsp_satu8_sub(uint8_t a, uint8_t b, CPUMIPSState *env)
+{
+ uint8_t temp8;
+ uint16_t temp;
+
+ temp = (uint16_t)a - (uint16_t)b;
+ temp8 = (temp >> 8) & 0x01;
+ if (temp8 == 1) {
+ temp = 0x00;
+ set_DSPControl_overflow_flag(1, 20, env);
+ }
+
+ return temp & 0x00FF;
+}
+
+static inline uint32_t mipsdsp_sub32(int32_t a, int32_t b, CPUMIPSState *env)
+{
+ int32_t temp;
+
+ temp = a - b;
+ if (MIPSDSP_OVERFLOW(a, -b, temp, 0x80000000)) {
+ set_DSPControl_overflow_flag(1, 20, env);
+ }
+
+ return temp;
+}
+
+static inline int32_t mipsdsp_add_i32(int32_t a, int32_t b, CPUMIPSState *env)
+{
+ int32_t temp;
+
+ temp = a + b;
+
+ if (MIPSDSP_OVERFLOW(a, b, temp, 0x80000000)) {
+ set_DSPControl_overflow_flag(1, 20, env);
+ }
+
+ return temp;
+}
+
+static inline int32_t mipsdsp_cmp_eq(int32_t a, int32_t b)
+{
+ return a == b;
+}
+
+static inline int32_t mipsdsp_cmp_le(int32_t a, int32_t b)
+{
+ return a <= b;
+}
+
+static inline int32_t mipsdsp_cmp_lt(int32_t a, int32_t b)
+{
+ return a < b;
+}
+
+static inline int32_t mipsdsp_cmpu_eq(uint32_t a, uint32_t b)
+{
+ return a == b;
+}
+
+static inline int32_t mipsdsp_cmpu_le(uint32_t a, uint32_t b)
+{
+ return a <= b;
+}
+
+static inline int32_t mipsdsp_cmpu_lt(uint32_t a, uint32_t b)
+{
+ return a < b;
+}
+/*** MIPS DSP internal functions end ***/
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-14 15:48:27 +0000