Commit 384e37e3 authored by Jingning Han's avatar Jingning Han
Browse files

SSE2 inverse 4x4 2D-DCT with DC only

Add SSE2 implementation to handle the special case of inverse 2D-DCT
where only DC coefficient is non-zero.

Change-Id: I2c6a59e21e5e77b8cf39a4af5eecf4d5ade32e2f
parent 91fa1242
......@@ -292,7 +292,7 @@ specialize vp9_convolve8_avg_vert ssse3 neon
# dct
#
prototype void vp9_short_idct4x4_1_add "int16_t *input, uint8_t *dest, int dest_stride"
specialize vp9_short_idct4x4_1_add
specialize vp9_short_idct4x4_1_add sse2
prototype void vp9_short_idct4x4_add "int16_t *input, uint8_t *dest, int dest_stride"
specialize vp9_short_idct4x4_add sse2
......
......@@ -148,6 +148,23 @@ void vp9_short_idct4x4_add_sse2(int16_t *input, uint8_t *dest, int stride) {
RECON_AND_STORE4X4(dest, input3);
}
void vp9_short_idct4x4_1_add_sse2(int16_t *input, uint8_t *dest, int stride) {
__m128i dc_value;
const __m128i zero = _mm_setzero_si128();
int a;
a = dct_const_round_shift(input[0] * cospi_16_64);
a = dct_const_round_shift(a * cospi_16_64);
a = ROUND_POWER_OF_TWO(a, 4);
dc_value = _mm_set1_epi16(a);
RECON_AND_STORE4X4(dest, dc_value);
RECON_AND_STORE4X4(dest, dc_value);
RECON_AND_STORE4X4(dest, dc_value);
RECON_AND_STORE4X4(dest, dc_value);
}
void vp9_idct4_1d_sse2(int16_t *input, int16_t *output) {
const __m128i zero = _mm_setzero_si128();
const __m128i c1 = _mm_setr_epi16((int16_t)cospi_16_64, (int16_t)cospi_16_64,
......
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