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lavu/ripemd: Add a size optimized version of the transform functions

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When compiling with --enable-small, ripemd.o will weigh a few kilobytes less than
it used to before the previous commit.

Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
James Almer 2013-09-09 05:42:22 -03:00 committed by Michael Niedermayer
parent 452ac2aaec
commit 8702a94e49
1 changed files with 72 additions and 3 deletions
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75
libavutil/ripemd.c
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@ -88,7 +88,7 @@ static const int WB[80] = {
#define rol(value, bits) ((value << bits) | (value >> (32 - bits)))
#define SWAP(a,b) if (ext) { int t = a; a = b; b = t; }
#define SWAP(a,b) if (ext) { t = a; a = b; b = t; }
#define ROUND128_0_TO_15(a,b,c,d,e,f,g,h) \
a = rol(a + (( b ^ c ^ d) + block[WA[n]]), ROTA[n]); \
@ -112,7 +112,7 @@ static const int WB[80] = {
static void ripemd128_transform(uint32_t *state, const uint8_t buffer[64], int ext)
{
uint32_t a, b, c, d, e, f, g, h;
uint32_t a, b, c, d, e, f, g, h, t;
uint32_t block[16];
int n;
@ -130,6 +130,36 @@ static void ripemd128_transform(uint32_t *state, const uint8_t buffer[64], int e
block[n] = AV_RL32(buffer + 4 * n);
n = 0;
#if CONFIG_SMALL
for (; n < 16;) {
ROUND128_0_TO_15(a,b,c,d,e,f,g,h);
t = d; d = c; c = b; b = a; a = t;
t = h; h = g; g = f; f = e; e = t;
}
SWAP(a,e)
for (; n < 32;) {
ROUND128_16_TO_31(a,b,c,d,e,f,g,h);
t = d; d = c; c = b; b = a; a = t;
t = h; h = g; g = f; f = e; e = t;
}
SWAP(b,f)
for (; n < 48;) {
ROUND128_32_TO_47(a,b,c,d,e,f,g,h);
t = d; d = c; c = b; b = a; a = t;
t = h; h = g; g = f; f = e; e = t;
}
SWAP(c,g)
for (; n < 64;) {
ROUND128_48_TO_63(a,b,c,d,e,f,g,h);
t = d; d = c; c = b; b = a; a = t;
t = h; h = g; g = f; f = e; e = t;
}
SWAP(d,h)
#else
#define R128_0 \
ROUND128_0_TO_15(a,b,c,d,e,f,g,h); \
ROUND128_0_TO_15(d,a,b,c,h,e,f,g); \
@ -165,6 +195,7 @@ static void ripemd128_transform(uint32_t *state, const uint8_t buffer[64], int e
R128_48; R128_48; R128_48; R128_48;
SWAP(d,h)
#endif
if (ext) {
state[0] += a; state[1] += b; state[2] += c; state[3] += d;
@ -210,7 +241,7 @@ static void ripemd128_transform(uint32_t *state, const uint8_t buffer[64], int e
static void ripemd160_transform(uint32_t *state, const uint8_t buffer[64], int ext)
{
uint32_t a, b, c, d, e, f, g, h, i, j;
uint32_t a, b, c, d, e, f, g, h, i, j, t;
uint32_t block[16];
int n;
@ -229,6 +260,43 @@ static void ripemd160_transform(uint32_t *state, const uint8_t buffer[64], int e
block[n] = AV_RL32(buffer + 4 * n);
n = 0;
#if CONFIG_SMALL
for (; n < 16;) {
ROUND160_0_TO_15(a,b,c,d,e,f,g,h,i,j);
t = e; e = d; d = c; c = b; b = a; a = t;
t = j; j = i; i = h; h = g; g = f; f = t;
}
SWAP(b,g)
for (; n < 32;) {
ROUND160_16_TO_31(a,b,c,d,e,f,g,h,i,j);
t = e; e = d; d = c; c = b; b = a; a = t;
t = j; j = i; i = h; h = g; g = f; f = t;
}
SWAP(d,i)
for (; n < 48;) {
ROUND160_32_TO_47(a,b,c,d,e,f,g,h,i,j);
t = e; e = d; d = c; c = b; b = a; a = t;
t = j; j = i; i = h; h = g; g = f; f = t;
}
SWAP(a,f)
for (; n < 64;) {
ROUND160_48_TO_63(a,b,c,d,e,f,g,h,i,j);
t = e; e = d; d = c; c = b; b = a; a = t;
t = j; j = i; i = h; h = g; g = f; f = t;
}
SWAP(c,h)
for (; n < 80;) {
ROUND160_64_TO_79(a,b,c,d,e,f,g,h,i,j);
t = e; e = d; d = c; c = b; b = a; a = t;
t = j; j = i; i = h; h = g; g = f; f = t;
}
SWAP(e,j)
#else
#define R160_0 \
ROUND160_0_TO_15(a,b,c,d,e,f,g,h,i,j); \
ROUND160_0_TO_15(e,a,b,c,d,j,f,g,h,i); \
@ -283,6 +351,7 @@ static void ripemd160_transform(uint32_t *state, const uint8_t buffer[64], int e
R160_64; R160_64; R160_64;
ROUND160_64_TO_79(b,c,d,e,a,g,h,i,j,f);
SWAP(e,j)
#endif
if (ext) {
state[0] += a; state[1] += b; state[2] += c; state[3] += d; state[4] += e;