--- /dev/null
+#define COMPONENT_SIZE 8
+#define MASK 0xff
+#define ONE_HALF 0x80
+
+#define A_SHIFT 8 * 3
+#define R_SHIFT 8 * 2
+#define G_SHIFT 8
+#define A_MASK 0xff000000
+#define R_MASK 0xff0000
+#define G_MASK 0xff00
+
+#define RB_MASK 0xff00ff
+#define AG_MASK 0xff00ff00
+#define RB_ONE_HALF 0x800080
+#define RB_MASK_PLUS_ONE 0x10000100
+
+#define ALPHA_8(x) ((x) >> A_SHIFT)
+#define RED_8(x) (((x) >> R_SHIFT) & MASK)
+#define GREEN_8(x) (((x) >> G_SHIFT) & MASK)
+#define BLUE_8(x) ((x) & MASK)
+
+/*
+ * ARMv6 has UQADD8 instruction, which implements unsigned saturated
+ * addition for 8-bit values packed in 32-bit registers. It is very useful
+ * for UN8x4_ADD_UN8x4, UN8_rb_ADD_UN8_rb and ADD_UN8 macros (which would
+ * otherwise need a lot of arithmetic operations to simulate this operation).
+ * Since most of the major ARM linux distros are built for ARMv7, we are
+ * much less dependent on runtime CPU detection and can get practical
+ * benefits from conditional compilation here for a lot of users.
+ */
+
+#if defined(USE_GCC_INLINE_ASM) && defined(__arm__) && \
+ !defined(__aarch64__) && (!defined(__thumb__) || defined(__thumb2__))
+#if defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || \
+ defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) || \
+ defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__) || \
+ defined(__ARM_ARCH_6M__) || defined(__ARM_ARCH_7__) || \
+ defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7R__) || \
+ defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7EM__)
+
+static force_inline uint32_t
+un8x4_add_un8x4 (uint32_t x, uint32_t y)
+{
+ uint32_t t;
+ asm ("uqadd8 %0, %1, %2" : "=r" (t) : "%r" (x), "r" (y));
+ return t;
+}
+
+#define UN8x4_ADD_UN8x4(x, y) \
+ ((x) = un8x4_add_un8x4 ((x), (y)))
+
+#define UN8_rb_ADD_UN8_rb(x, y, t) \
+ ((t) = un8x4_add_un8x4 ((x), (y)), (x) = (t))
+
+#define ADD_UN8(x, y, t) \
+ ((t) = (x), un8x4_add_un8x4 ((t), (y)))
+
+#endif
+#endif
+
+/*****************************************************************************/
+
+/*
+ * Helper macros.
+ */
+
+#define MUL_UN8(a, b, t) \
+ ((t) = (a) * (uint16_t)(b) + ONE_HALF, ((((t) >> G_SHIFT ) + (t) ) >> G_SHIFT ))
+
+#define DIV_UN8(a, b) \
+ (((uint16_t) (a) * MASK + ((b) / 2)) / (b))
+
+#ifndef ADD_UN8
+#define ADD_UN8(x, y, t) \
+ ((t) = (x) + (y), \
+ (uint32_t) (uint8_t) ((t) | (0 - ((t) >> G_SHIFT))))
+#endif
+
+#define DIV_ONE_UN8(x) \
+ (((x) + ONE_HALF + (((x) + ONE_HALF) >> G_SHIFT)) >> G_SHIFT)
+
+/*
+ * The methods below use some tricks to be able to do two color
+ * components at the same time.
+ */
+
+/*
+ * x_rb = (x_rb * a) / 255
+ */
+#define UN8_rb_MUL_UN8(x, a, t) \
+ do \
+ { \
+ t = ((x) & RB_MASK) * (a); \
+ t += RB_ONE_HALF; \
+ x = (t + ((t >> G_SHIFT) & RB_MASK)) >> G_SHIFT; \
+ x &= RB_MASK; \
+ } while (0)
+
+/*
+ * x_rb = min (x_rb + y_rb, 255)
+ */
+#ifndef UN8_rb_ADD_UN8_rb
+#define UN8_rb_ADD_UN8_rb(x, y, t) \
+ do \
+ { \
+ t = ((x) + (y)); \
+ t |= RB_MASK_PLUS_ONE - ((t >> G_SHIFT) & RB_MASK); \
+ x = (t & RB_MASK); \
+ } while (0)
+#endif
+
+/*
+ * x_rb = (x_rb * a_rb) / 255
+ */
+#define UN8_rb_MUL_UN8_rb(x, a, t) \
+ do \
+ { \
+ t = (x & MASK) * (a & MASK); \
+ t |= (x & R_MASK) * ((a >> R_SHIFT) & MASK); \
+ t += RB_ONE_HALF; \
+ t = (t + ((t >> G_SHIFT) & RB_MASK)) >> G_SHIFT; \
+ x = t & RB_MASK; \
+ } while (0)
+
+/*
+ * x_c = (x_c * a) / 255
+ */
+#define UN8x4_MUL_UN8(x, a) \
+ do \
+ { \
+ uint32_t r1__, r2__, t__; \
+ \
+ r1__ = (x); \
+ UN8_rb_MUL_UN8 (r1__, (a), t__); \
+ \
+ r2__ = (x) >> G_SHIFT; \
+ UN8_rb_MUL_UN8 (r2__, (a), t__); \
+ \
+ (x) = r1__ | (r2__ << G_SHIFT); \
+ } while (0)
+
+/*
+ * x_c = (x_c * a) / 255 + y_c
+ */
+#define UN8x4_MUL_UN8_ADD_UN8x4(x, a, y) \
+ do \
+ { \
+ uint32_t r1__, r2__, r3__, t__; \
+ \
+ r1__ = (x); \
+ r2__ = (y) & RB_MASK; \
+ UN8_rb_MUL_UN8 (r1__, (a), t__); \
+ UN8_rb_ADD_UN8_rb (r1__, r2__, t__); \
+ \
+ r2__ = (x) >> G_SHIFT; \
+ r3__ = ((y) >> G_SHIFT) & RB_MASK; \
+ UN8_rb_MUL_UN8 (r2__, (a), t__); \
+ UN8_rb_ADD_UN8_rb (r2__, r3__, t__); \
+ \
+ (x) = r1__ | (r2__ << G_SHIFT); \
+ } while (0)
+
+/*
+ * x_c = (x_c * a + y_c * b) / 255
+ */
+#define UN8x4_MUL_UN8_ADD_UN8x4_MUL_UN8(x, a, y, b) \
+ do \
+ { \
+ uint32_t r1__, r2__, r3__, t__; \
+ \
+ r1__ = (x); \
+ r2__ = (y); \
+ UN8_rb_MUL_UN8 (r1__, (a), t__); \
+ UN8_rb_MUL_UN8 (r2__, (b), t__); \
+ UN8_rb_ADD_UN8_rb (r1__, r2__, t__); \
+ \
+ r2__ = ((x) >> G_SHIFT); \
+ r3__ = ((y) >> G_SHIFT); \
+ UN8_rb_MUL_UN8 (r2__, (a), t__); \
+ UN8_rb_MUL_UN8 (r3__, (b), t__); \
+ UN8_rb_ADD_UN8_rb (r2__, r3__, t__); \
+ \
+ (x) = r1__ | (r2__ << G_SHIFT); \
+ } while (0)
+
+/*
+ * x_c = (x_c * a_c) / 255
+ */
+#define UN8x4_MUL_UN8x4(x, a) \
+ do \
+ { \
+ uint32_t r1__, r2__, r3__, t__; \
+ \
+ r1__ = (x); \
+ r2__ = (a); \
+ UN8_rb_MUL_UN8_rb (r1__, r2__, t__); \
+ \
+ r2__ = (x) >> G_SHIFT; \
+ r3__ = (a) >> G_SHIFT; \
+ UN8_rb_MUL_UN8_rb (r2__, r3__, t__); \
+ \
+ (x) = r1__ | (r2__ << G_SHIFT); \
+ } while (0)
+
+/*
+ * x_c = (x_c * a_c) / 255 + y_c
+ */
+#define UN8x4_MUL_UN8x4_ADD_UN8x4(x, a, y) \
+ do \
+ { \
+ uint32_t r1__, r2__, r3__, t__; \
+ \
+ r1__ = (x); \
+ r2__ = (a); \
+ UN8_rb_MUL_UN8_rb (r1__, r2__, t__); \
+ r2__ = (y) & RB_MASK; \
+ UN8_rb_ADD_UN8_rb (r1__, r2__, t__); \
+ \
+ r2__ = ((x) >> G_SHIFT); \
+ r3__ = ((a) >> G_SHIFT); \
+ UN8_rb_MUL_UN8_rb (r2__, r3__, t__); \
+ r3__ = ((y) >> G_SHIFT) & RB_MASK; \
+ UN8_rb_ADD_UN8_rb (r2__, r3__, t__); \
+ \
+ (x) = r1__ | (r2__ << G_SHIFT); \
+ } while (0)
+
+/*
+ * x_c = (x_c * a_c + y_c * b) / 255
+ */
+#define UN8x4_MUL_UN8x4_ADD_UN8x4_MUL_UN8(x, a, y, b) \
+ do \
+ { \
+ uint32_t r1__, r2__, r3__, t__; \
+ \
+ r1__ = (x); \
+ r2__ = (a); \
+ UN8_rb_MUL_UN8_rb (r1__, r2__, t__); \
+ r2__ = (y); \
+ UN8_rb_MUL_UN8 (r2__, (b), t__); \
+ UN8_rb_ADD_UN8_rb (r1__, r2__, t__); \
+ \
+ r2__ = (x) >> G_SHIFT; \
+ r3__ = (a) >> G_SHIFT; \
+ UN8_rb_MUL_UN8_rb (r2__, r3__, t__); \
+ r3__ = (y) >> G_SHIFT; \
+ UN8_rb_MUL_UN8 (r3__, (b), t__); \
+ UN8_rb_ADD_UN8_rb (r2__, r3__, t__); \
+ \
+ x = r1__ | (r2__ << G_SHIFT); \
+ } while (0)
+
+/*
+ x_c = min(x_c + y_c, 255)
+*/
+#ifndef UN8x4_ADD_UN8x4
+#define UN8x4_ADD_UN8x4(x, y) \
+ do \
+ { \
+ uint32_t r1__, r2__, r3__, t__; \
+ \
+ r1__ = (x) & RB_MASK; \
+ r2__ = (y) & RB_MASK; \
+ UN8_rb_ADD_UN8_rb (r1__, r2__, t__); \
+ \
+ r2__ = ((x) >> G_SHIFT) & RB_MASK; \
+ r3__ = ((y) >> G_SHIFT) & RB_MASK; \
+ UN8_rb_ADD_UN8_rb (r2__, r3__, t__); \
+ \
+ x = r1__ | (r2__ << G_SHIFT); \
+ } while (0)
+#endif
Code Review / kvmfornfv.git / blobdiff