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authorPeter Maydell <peter.maydell@linaro.org>2021-08-13 17:11:57 +0100
committerPeter Maydell <peter.maydell@linaro.org>2021-08-25 10:48:50 +0100
commit075e7e97e3a042854b8ea2827559891a577b4a6b (patch)
treebaf862c09e846f5aa3c054bbc00992a6c0e79ea9 /target/arm/mve_helper.c
parentfac80f0856cc465b21e2e59a64146b3540e055db (diff)
target/arm: Implement MVE interleaving loads/stores
Implement the MVE interleaving load/store functions VLD2, VLD4, VST2 and VST4. VLD2 loads 16 bytes of data from memory and writes to 2 consecutive Qregs; VLD4 loads 16 bytes of data from memory and writes to 4 consecutive Qregs. The 'pattern' field in the encoding determines the offset into memory which is accessed and also which elements in the Qregs are written to. (The intention is that a sequence of four consecutive VLD4 with different pattern values performs a complete de-interleaving load of 64 bytes into all elements of the 4 Qregs.) VST2 and VST4 do the same, but for stores. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'target/arm/mve_helper.c')
-rw-r--r--target/arm/mve_helper.c342
1 files changed, 342 insertions, 0 deletions
diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index bbbaa53807..c2826eb5f9 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -363,6 +363,348 @@ DO_VSTR_SG(vstrw_sg_wb_uw, stl, 4, uint32_t, ADDR_ADD, true)
DO_VSTR64_SG(vstrd_sg_wb_ud, ADDR_ADD, true)
/*
+ * Deinterleaving loads/interleaving stores.
+ *
+ * For these helpers we are passed the index of the first Qreg
+ * (VLD2/VST2 will also access Qn+1, VLD4/VST4 access Qn .. Qn+3)
+ * and the value of the base address register Rn.
+ * The helpers are specialized for pattern and element size, so
+ * for instance vld42h is VLD4 with pattern 2, element size MO_16.
+ *
+ * These insns are beatwise but not predicated, so we must honour ECI,
+ * but need not look at mve_element_mask().
+ *
+ * The pseudocode implements these insns with multiple memory accesses
+ * of the element size, but rules R_VVVG and R_FXDM permit us to make
+ * one 32-bit memory access per beat.
+ */
+#define DO_VLD4B(OP, O1, O2, O3, O4) \
+ void HELPER(mve_##OP)(CPUARMState *env, uint32_t qnidx, \
+ uint32_t base) \
+ { \
+ int beat, e; \
+ uint16_t mask = mve_eci_mask(env); \
+ static const uint8_t off[4] = { O1, O2, O3, O4 }; \
+ uint32_t addr, data; \
+ for (beat = 0; beat < 4; beat++, mask >>= 4) { \
+ if ((mask & 1) == 0) { \
+ /* ECI says skip this beat */ \
+ continue; \
+ } \
+ addr = base + off[beat] * 4; \
+ data = cpu_ldl_le_data_ra(env, addr, GETPC()); \
+ for (e = 0; e < 4; e++, data >>= 8) { \
+ uint8_t *qd = (uint8_t *)aa32_vfp_qreg(env, qnidx + e); \
+ qd[H1(off[beat])] = data; \
+ } \
+ } \
+ }
+
+#define DO_VLD4H(OP, O1, O2) \
+ void HELPER(mve_##OP)(CPUARMState *env, uint32_t qnidx, \
+ uint32_t base) \
+ { \
+ int beat; \
+ uint16_t mask = mve_eci_mask(env); \
+ static const uint8_t off[4] = { O1, O1, O2, O2 }; \
+ uint32_t addr, data; \
+ int y; /* y counts 0 2 0 2 */ \
+ uint16_t *qd; \
+ for (beat = 0, y = 0; beat < 4; beat++, mask >>= 4, y ^= 2) { \
+ if ((mask & 1) == 0) { \
+ /* ECI says skip this beat */ \
+ continue; \
+ } \
+ addr = base + off[beat] * 8 + (beat & 1) * 4; \
+ data = cpu_ldl_le_data_ra(env, addr, GETPC()); \
+ qd = (uint16_t *)aa32_vfp_qreg(env, qnidx + y); \
+ qd[H2(off[beat])] = data; \
+ data >>= 16; \
+ qd = (uint16_t *)aa32_vfp_qreg(env, qnidx + y + 1); \
+ qd[H2(off[beat])] = data; \
+ } \
+ }
+
+#define DO_VLD4W(OP, O1, O2, O3, O4) \
+ void HELPER(mve_##OP)(CPUARMState *env, uint32_t qnidx, \
+ uint32_t base) \
+ { \
+ int beat; \
+ uint16_t mask = mve_eci_mask(env); \
+ static const uint8_t off[4] = { O1, O2, O3, O4 }; \
+ uint32_t addr, data; \
+ uint32_t *qd; \
+ int y; \
+ for (beat = 0; beat < 4; beat++, mask >>= 4) { \
+ if ((mask & 1) == 0) { \
+ /* ECI says skip this beat */ \
+ continue; \
+ } \
+ addr = base + off[beat] * 4; \
+ data = cpu_ldl_le_data_ra(env, addr, GETPC()); \
+ y = (beat + (O1 & 2)) & 3; \
+ qd = (uint32_t *)aa32_vfp_qreg(env, qnidx + y); \
+ qd[H4(off[beat] >> 2)] = data; \
+ } \
+ }
+
+DO_VLD4B(vld40b, 0, 1, 10, 11)
+DO_VLD4B(vld41b, 2, 3, 12, 13)
+DO_VLD4B(vld42b, 4, 5, 14, 15)
+DO_VLD4B(vld43b, 6, 7, 8, 9)
+
+DO_VLD4H(vld40h, 0, 5)
+DO_VLD4H(vld41h, 1, 6)
+DO_VLD4H(vld42h, 2, 7)
+DO_VLD4H(vld43h, 3, 4)
+
+DO_VLD4W(vld40w, 0, 1, 10, 11)
+DO_VLD4W(vld41w, 2, 3, 12, 13)
+DO_VLD4W(vld42w, 4, 5, 14, 15)
+DO_VLD4W(vld43w, 6, 7, 8, 9)
+
+#define DO_VLD2B(OP, O1, O2, O3, O4) \
+ void HELPER(mve_##OP)(CPUARMState *env, uint32_t qnidx, \
+ uint32_t base) \
+ { \
+ int beat, e; \
+ uint16_t mask = mve_eci_mask(env); \
+ static const uint8_t off[4] = { O1, O2, O3, O4 }; \
+ uint32_t addr, data; \
+ uint8_t *qd; \
+ for (beat = 0; beat < 4; beat++, mask >>= 4) { \
+ if ((mask & 1) == 0) { \
+ /* ECI says skip this beat */ \
+ continue; \
+ } \
+ addr = base + off[beat] * 2; \
+ data = cpu_ldl_le_data_ra(env, addr, GETPC()); \
+ for (e = 0; e < 4; e++, data >>= 8) { \
+ qd = (uint8_t *)aa32_vfp_qreg(env, qnidx + (e & 1)); \
+ qd[H1(off[beat] + (e >> 1))] = data; \
+ } \
+ } \
+ }
+
+#define DO_VLD2H(OP, O1, O2, O3, O4) \
+ void HELPER(mve_##OP)(CPUARMState *env, uint32_t qnidx, \
+ uint32_t base) \
+ { \
+ int beat; \
+ uint16_t mask = mve_eci_mask(env); \
+ static const uint8_t off[4] = { O1, O2, O3, O4 }; \
+ uint32_t addr, data; \
+ int e; \
+ uint16_t *qd; \
+ for (beat = 0; beat < 4; beat++, mask >>= 4) { \
+ if ((mask & 1) == 0) { \
+ /* ECI says skip this beat */ \
+ continue; \
+ } \
+ addr = base + off[beat] * 4; \
+ data = cpu_ldl_le_data_ra(env, addr, GETPC()); \
+ for (e = 0; e < 2; e++, data >>= 16) { \
+ qd = (uint16_t *)aa32_vfp_qreg(env, qnidx + e); \
+ qd[H2(off[beat])] = data; \
+ } \
+ } \
+ }
+
+#define DO_VLD2W(OP, O1, O2, O3, O4) \
+ void HELPER(mve_##OP)(CPUARMState *env, uint32_t qnidx, \
+ uint32_t base) \
+ { \
+ int beat; \
+ uint16_t mask = mve_eci_mask(env); \
+ static const uint8_t off[4] = { O1, O2, O3, O4 }; \
+ uint32_t addr, data; \
+ uint32_t *qd; \
+ for (beat = 0; beat < 4; beat++, mask >>= 4) { \
+ if ((mask & 1) == 0) { \
+ /* ECI says skip this beat */ \
+ continue; \
+ } \
+ addr = base + off[beat]; \
+ data = cpu_ldl_le_data_ra(env, addr, GETPC()); \
+ qd = (uint32_t *)aa32_vfp_qreg(env, qnidx + (beat & 1)); \
+ qd[H4(off[beat] >> 3)] = data; \
+ } \
+ }
+
+DO_VLD2B(vld20b, 0, 2, 12, 14)
+DO_VLD2B(vld21b, 4, 6, 8, 10)
+
+DO_VLD2H(vld20h, 0, 1, 6, 7)
+DO_VLD2H(vld21h, 2, 3, 4, 5)
+
+DO_VLD2W(vld20w, 0, 4, 24, 28)
+DO_VLD2W(vld21w, 8, 12, 16, 20)
+
+#define DO_VST4B(OP, O1, O2, O3, O4) \
+ void HELPER(mve_##OP)(CPUARMState *env, uint32_t qnidx, \
+ uint32_t base) \
+ { \
+ int beat, e; \
+ uint16_t mask = mve_eci_mask(env); \
+ static const uint8_t off[4] = { O1, O2, O3, O4 }; \
+ uint32_t addr, data; \
+ for (beat = 0; beat < 4; beat++, mask >>= 4) { \
+ if ((mask & 1) == 0) { \
+ /* ECI says skip this beat */ \
+ continue; \
+ } \
+ addr = base + off[beat] * 4; \
+ data = 0; \
+ for (e = 3; e >= 0; e--) { \
+ uint8_t *qd = (uint8_t *)aa32_vfp_qreg(env, qnidx + e); \
+ data = (data << 8) | qd[H1(off[beat])]; \
+ } \
+ cpu_stl_le_data_ra(env, addr, data, GETPC()); \
+ } \
+ }
+
+#define DO_VST4H(OP, O1, O2) \
+ void HELPER(mve_##OP)(CPUARMState *env, uint32_t qnidx, \
+ uint32_t base) \
+ { \
+ int beat; \
+ uint16_t mask = mve_eci_mask(env); \
+ static const uint8_t off[4] = { O1, O1, O2, O2 }; \
+ uint32_t addr, data; \
+ int y; /* y counts 0 2 0 2 */ \
+ uint16_t *qd; \
+ for (beat = 0, y = 0; beat < 4; beat++, mask >>= 4, y ^= 2) { \
+ if ((mask & 1) == 0) { \
+ /* ECI says skip this beat */ \
+ continue; \
+ } \
+ addr = base + off[beat] * 8 + (beat & 1) * 4; \
+ qd = (uint16_t *)aa32_vfp_qreg(env, qnidx + y); \
+ data = qd[H2(off[beat])]; \
+ qd = (uint16_t *)aa32_vfp_qreg(env, qnidx + y + 1); \
+ data |= qd[H2(off[beat])] << 16; \
+ cpu_stl_le_data_ra(env, addr, data, GETPC()); \
+ } \
+ }
+
+#define DO_VST4W(OP, O1, O2, O3, O4) \
+ void HELPER(mve_##OP)(CPUARMState *env, uint32_t qnidx, \
+ uint32_t base) \
+ { \
+ int beat; \
+ uint16_t mask = mve_eci_mask(env); \
+ static const uint8_t off[4] = { O1, O2, O3, O4 }; \
+ uint32_t addr, data; \
+ uint32_t *qd; \
+ int y; \
+ for (beat = 0; beat < 4; beat++, mask >>= 4) { \
+ if ((mask & 1) == 0) { \
+ /* ECI says skip this beat */ \
+ continue; \
+ } \
+ addr = base + off[beat] * 4; \
+ y = (beat + (O1 & 2)) & 3; \
+ qd = (uint32_t *)aa32_vfp_qreg(env, qnidx + y); \
+ data = qd[H4(off[beat] >> 2)]; \
+ cpu_stl_le_data_ra(env, addr, data, GETPC()); \
+ } \
+ }
+
+DO_VST4B(vst40b, 0, 1, 10, 11)
+DO_VST4B(vst41b, 2, 3, 12, 13)
+DO_VST4B(vst42b, 4, 5, 14, 15)
+DO_VST4B(vst43b, 6, 7, 8, 9)
+
+DO_VST4H(vst40h, 0, 5)
+DO_VST4H(vst41h, 1, 6)
+DO_VST4H(vst42h, 2, 7)
+DO_VST4H(vst43h, 3, 4)
+
+DO_VST4W(vst40w, 0, 1, 10, 11)
+DO_VST4W(vst41w, 2, 3, 12, 13)
+DO_VST4W(vst42w, 4, 5, 14, 15)
+DO_VST4W(vst43w, 6, 7, 8, 9)
+
+#define DO_VST2B(OP, O1, O2, O3, O4) \
+ void HELPER(mve_##OP)(CPUARMState *env, uint32_t qnidx, \
+ uint32_t base) \
+ { \
+ int beat, e; \
+ uint16_t mask = mve_eci_mask(env); \
+ static const uint8_t off[4] = { O1, O2, O3, O4 }; \
+ uint32_t addr, data; \
+ uint8_t *qd; \
+ for (beat = 0; beat < 4; beat++, mask >>= 4) { \
+ if ((mask & 1) == 0) { \
+ /* ECI says skip this beat */ \
+ continue; \
+ } \
+ addr = base + off[beat] * 2; \
+ data = 0; \
+ for (e = 3; e >= 0; e--) { \
+ qd = (uint8_t *)aa32_vfp_qreg(env, qnidx + (e & 1)); \
+ data = (data << 8) | qd[H1(off[beat] + (e >> 1))]; \
+ } \
+ cpu_stl_le_data_ra(env, addr, data, GETPC()); \
+ } \
+ }
+
+#define DO_VST2H(OP, O1, O2, O3, O4) \
+ void HELPER(mve_##OP)(CPUARMState *env, uint32_t qnidx, \
+ uint32_t base) \
+ { \
+ int beat; \
+ uint16_t mask = mve_eci_mask(env); \
+ static const uint8_t off[4] = { O1, O2, O3, O4 }; \
+ uint32_t addr, data; \
+ int e; \
+ uint16_t *qd; \
+ for (beat = 0; beat < 4; beat++, mask >>= 4) { \
+ if ((mask & 1) == 0) { \
+ /* ECI says skip this beat */ \
+ continue; \
+ } \
+ addr = base + off[beat] * 4; \
+ data = 0; \
+ for (e = 1; e >= 0; e--) { \
+ qd = (uint16_t *)aa32_vfp_qreg(env, qnidx + e); \
+ data = (data << 16) | qd[H2(off[beat])]; \
+ } \
+ cpu_stl_le_data_ra(env, addr, data, GETPC()); \
+ } \
+ }
+
+#define DO_VST2W(OP, O1, O2, O3, O4) \
+ void HELPER(mve_##OP)(CPUARMState *env, uint32_t qnidx, \
+ uint32_t base) \
+ { \
+ int beat; \
+ uint16_t mask = mve_eci_mask(env); \
+ static const uint8_t off[4] = { O1, O2, O3, O4 }; \
+ uint32_t addr, data; \
+ uint32_t *qd; \
+ for (beat = 0; beat < 4; beat++, mask >>= 4) { \
+ if ((mask & 1) == 0) { \
+ /* ECI says skip this beat */ \
+ continue; \
+ } \
+ addr = base + off[beat]; \
+ qd = (uint32_t *)aa32_vfp_qreg(env, qnidx + (beat & 1)); \
+ data = qd[H4(off[beat] >> 3)]; \
+ cpu_stl_le_data_ra(env, addr, data, GETPC()); \
+ } \
+ }
+
+DO_VST2B(vst20b, 0, 2, 12, 14)
+DO_VST2B(vst21b, 4, 6, 8, 10)
+
+DO_VST2H(vst20h, 0, 1, 6, 7)
+DO_VST2H(vst21h, 2, 3, 4, 5)
+
+DO_VST2W(vst20w, 0, 4, 24, 28)
+DO_VST2W(vst21w, 8, 12, 16, 20)
+
+/*
* The mergemask(D, R, M) macro performs the operation "*D = R" but
* storing only the bytes which correspond to 1 bits in M,
* leaving other bytes in *D unchanged. We use _Generic
generated by cgit v1.2.3 (git 2.26.2) at 2025-03-03 17:38:50 +0000