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arm/neon: add LSX implementations for vpaddlq_{s8,s16,u8,u16} #1456

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Merged
mr-c merged 1 commit into from
Oct 10, 2026
Merged

arm/neon: add LSX implementations for vpaddlq_{s8,s16,u8,u16} #1456

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24 changes: 24 additions & 0 deletions simde/arm/neon/paddl.h
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Original file line number Diff line number Diff line change
Expand Up @@ -138,6 +138,15 @@ simde_int16x8_t
simde_vpaddlq_s8(simde_int8x16_t a) {
#if defined(SIMDE_ARM_NEON_A32V7_NATIVE)
return vpaddlq_s8(a);
#elif defined(SIMDE_LOONGARCH_LSX_NATIVE)
/* Add adjacent elements pairwise, widening one step. LSX's horizontal
* add - vhaddw_<wide>_<narrow> - does exactly this over all sixteen
* bytes of both operands, so passing the same register twice yields the
* eight pairwise sums in one instruction. */
simde_int8x16_private a_ = simde_int8x16_to_private(a);
simde_int16x8_private r_;
r_.m128i = __lsx_vhaddw_h_b(a_.m128i, a_.m128i);
return simde_int16x8_from_private(r_);
#elif defined(SIMDE_POWER_ALTIVEC_P6_NATIVE)
SIMDE_POWER_ALTIVEC_VECTOR(signed char) one = vec_splat_s8(1);
return
Expand Down Expand Up @@ -177,6 +186,11 @@ simde_int32x4_t
simde_vpaddlq_s16(simde_int16x8_t a) {
#if defined(SIMDE_ARM_NEON_A32V7_NATIVE)
return vpaddlq_s16(a);
#elif defined(SIMDE_LOONGARCH_LSX_NATIVE)
simde_int16x8_private a_ = simde_int16x8_to_private(a);
simde_int32x4_private r_;
r_.m128i = __lsx_vhaddw_w_h(a_.m128i, a_.m128i);
return simde_int32x4_from_private(r_);
#elif defined(SIMDE_POWER_ALTIVEC_P6_NATIVE)
SIMDE_POWER_ALTIVEC_VECTOR(signed short) one = vec_splat_s16(1);
return
Expand Down Expand Up @@ -236,6 +250,11 @@ simde_uint16x8_t
simde_vpaddlq_u8(simde_uint8x16_t a) {
#if defined(SIMDE_ARM_NEON_A32V7_NATIVE)
return vpaddlq_u8(a);
#elif defined(SIMDE_LOONGARCH_LSX_NATIVE)
simde_uint8x16_private a_ = simde_uint8x16_to_private(a);
simde_uint16x8_private r_;
r_.m128i = __lsx_vhaddw_hu_bu(a_.m128i, a_.m128i);
return simde_uint16x8_from_private(r_);
#elif defined(SIMDE_POWER_ALTIVEC_P6_NATIVE)
SIMDE_POWER_ALTIVEC_VECTOR(unsigned char) one = vec_splat_u8(1);
return
Expand Down Expand Up @@ -272,6 +291,11 @@ simde_uint32x4_t
simde_vpaddlq_u16(simde_uint16x8_t a) {
#if defined(SIMDE_ARM_NEON_A32V7_NATIVE)
return vpaddlq_u16(a);
#elif defined(SIMDE_LOONGARCH_LSX_NATIVE)
simde_uint16x8_private a_ = simde_uint16x8_to_private(a);
simde_uint32x4_private r_;
r_.m128i = __lsx_vhaddw_wu_hu(a_.m128i, a_.m128i);
return simde_uint32x4_from_private(r_);
#elif defined(SIMDE_POWER_ALTIVEC_P6_NATIVE)
SIMDE_POWER_ALTIVEC_VECTOR(unsigned short) one = vec_splat_u16(1);
return
Expand Down
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