[v3,24/37] target/riscv: Non-SIMD Q15 saturation ALU Instructions

Commit Message

LIU Zhiwei June 24, 2021, 10:55 a.m. UTC

Q15 saturation is to limit the result to the range
[INT16_MIN, INT16_MAX].

Signed-off-by: LIU Zhiwei <[e-mail]>
---
 target/riscv/helper.h                   |  8 +++
 target/riscv/insn32.decode              |  8 +++
 target/riscv/insn_trans/trans_rvp.c.inc | 12 ++++
 target/riscv/packed_helper.c            | 78 +++++++++++++++++++++++++
 4 files changed, 106 insertions(+)

Patch

diff --git a/target/riscv/helper.h b/target/riscv/helper.h
index 87a0779842..6ce22a186e 100644
--- a/target/riscv/helper.h
+++ b/target/riscv/helper.h
@@ -1361,3 +1361,11 @@  DEF_HELPER_4(smalxds, i64, env, tl, tl, i64)
 DEF_HELPER_4(smaldrs, i64, env, tl, tl, i64)
 DEF_HELPER_4(smslda, i64, env, tl, tl, i64)
 DEF_HELPER_4(smslxda, i64, env, tl, tl, i64)
+
+DEF_HELPER_3(kaddh, tl, env, tl, tl)
+DEF_HELPER_3(ksubh, tl, env, tl, tl)
+DEF_HELPER_3(khmbb, tl, env, tl, tl)
+DEF_HELPER_3(khmbt, tl, env, tl, tl)
+DEF_HELPER_3(khmtt, tl, env, tl, tl)
+DEF_HELPER_3(ukaddh, tl, env, tl, tl)
+DEF_HELPER_3(uksubh, tl, env, tl, tl)
diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode
index d1668b34cb..f465851f03 100644
--- a/target/riscv/insn32.decode
+++ b/target/riscv/insn32.decode
@@ -964,3 +964,11 @@  smaldrs    1001101  ..... ..... 001 ..... 1110111 @r
 smalxds    1010101  ..... ..... 001 ..... 1110111 @r
 smslda     1010110  ..... ..... 001 ..... 1110111 @r
 smslxda    1011110  ..... ..... 001 ..... 1110111 @r
+
+kaddh      0000010  ..... ..... 001 ..... 1110111 @r
+ksubh      0000011  ..... ..... 001 ..... 1110111 @r
+khmbb      0000110  ..... ..... 001 ..... 1110111 @r
+khmbt      0001110  ..... ..... 001 ..... 1110111 @r
+khmtt      0010110  ..... ..... 001 ..... 1110111 @r
+ukaddh     0001010  ..... ..... 001 ..... 1110111 @r
+uksubh     0001011  ..... ..... 001 ..... 1110111 @r
diff --git a/target/riscv/insn_trans/trans_rvp.c.inc b/target/riscv/insn_trans/trans_rvp.c.inc
index 7c91bdc888..48eb190bc6 100644
--- a/target/riscv/insn_trans/trans_rvp.c.inc
+++ b/target/riscv/insn_trans/trans_rvp.c.inc
@@ -669,3 +669,15 @@  GEN_RVP_R_D64_ACC_OOL(smaldrs);
 GEN_RVP_R_D64_ACC_OOL(smalxds);
 GEN_RVP_R_D64_ACC_OOL(smslda);
 GEN_RVP_R_D64_ACC_OOL(smslxda);
+
+/*
+ *** Non-SIMD Instructions
+ */
+/* Non-SIMD Q15 saturation ALU Instructions */
+GEN_RVP_R_OOL(kaddh);
+GEN_RVP_R_OOL(ksubh);
+GEN_RVP_R_OOL(khmbb);
+GEN_RVP_R_OOL(khmbt);
+GEN_RVP_R_OOL(khmtt);
+GEN_RVP_R_OOL(ukaddh);
+GEN_RVP_R_OOL(uksubh);
diff --git a/target/riscv/packed_helper.c b/target/riscv/packed_helper.c
index 3330a2ecec..171f88face 100644
--- a/target/riscv/packed_helper.c
+++ b/target/riscv/packed_helper.c
@@ -2526,3 +2526,81 @@  static inline void do_smslxda(CPURISCVState *env, void *vd, void *va,
 }
 
 RVPR64_ACC(smslxda, 2, 2);
+
+/* Q15 saturation instructions */
+static inline void do_kaddh(CPURISCVState *env, void *vd, void *va,
+                            void *vb, uint8_t i)
+{
+    target_long *d = vd;
+    int32_t *a = va, *b = vb;
+
+    *d = sat64(env, (int64_t)a[H4(i)] + b[H4(i)], 15);
+}
+
+RVPR(kaddh, 2, 4);
+
+static inline void do_ksubh(CPURISCVState *env, void *vd, void *va,
+                            void *vb, uint8_t i)
+{
+    target_long *d = vd;
+    int32_t *a = va, *b = vb;
+
+    *d = sat64(env, (int64_t)a[H4(i)] - b[H4(i)], 15);
+}
+
+RVPR(ksubh, 2, 4);
+
+static inline void do_khmbb(CPURISCVState *env, void *vd, void *va,
+                            void *vb, uint8_t i)
+{
+    target_long *d = vd;
+    int16_t *a = va, *b = vb;
+
+    *d = sat64(env, (int64_t)a[H2(i)] * b[H2(i)] >> 15, 15);
+}
+
+RVPR(khmbb, 4, 2);
+
+static inline void do_khmbt(CPURISCVState *env, void *vd, void *va,
+                            void *vb, uint8_t i)
+{
+    target_long *d = vd;
+    int16_t *a = va, *b = vb;
+
+    *d = sat64(env, (int64_t)a[H2(i)] * b[H2(i + 1)] >> 15, 15);
+}
+
+RVPR(khmbt, 4, 2);
+
+static inline void do_khmtt(CPURISCVState *env, void *vd, void *va,
+                            void *vb, uint8_t i)
+{
+    target_long *d = vd;
+    int16_t *a = va, *b = vb;
+
+    *d = sat64(env, (int64_t)a[H2(i + 1)] * b[H2(i + 1)] >> 15, 15);
+}
+
+RVPR(khmtt, 4, 2);
+
+static inline void do_ukaddh(CPURISCVState *env, void *vd, void *va,
+                             void *vb, uint8_t i)
+{
+    target_long *d = vd;
+    uint32_t *a = va, *b = vb;
+
+    *d = (int16_t)satu64(env, saddu32(env, 0, a[H4(i)], b[H4(i)]), 16);
+}
+
+RVPR(ukaddh, 2, 4);
+
+static inline void do_uksubh(CPURISCVState *env, void *vd, void *va,
+                             void *vb, uint8_t i)
+{
+    target_long *d = vd;
+    uint32_t *a = va, *b = vb;
+
+    *d = (int16_t)satu64(env, ssubu32(env, 0, a[H4(i)], b[H4(i)]), 16);
+}
+
+RVPR(uksubh, 2, 4);