Rename i2f() to int2float(), and make it global so one copy can be removed.
Remove the copy of i2f() in r600_blit_kms.c
We rename the function to something longer now that it is a global
symbol. This reduces the likelyhood of unintended clashes later.
This might be a candidate for inclusion inside general drm infrastructure.
However, at the moment only the radeon driver uses it.
Signed-off-by: Steven Fuerst <svfuerst@gmail.com>
diff --git a/drivers/gpu/drm/radeon/r600_blit_kms.c b/drivers/gpu/drm/radeon/r600_blit_kms.c
index 2bef854..1c7ed3a 100644
--- a/drivers/gpu/drm/radeon/r600_blit_kms.c
+++ b/drivers/gpu/drm/radeon/r600_blit_kms.c
@@ -455,46 +455,6 @@
radeon_ring_write(ring, sq_stack_resource_mgmt_2);
}
-#define I2F_MAX_BITS 15
-#define I2F_MAX_INPUT ((1 << I2F_MAX_BITS) - 1)
-#define I2F_SHIFT (24 - I2F_MAX_BITS)
-
-/*
- * Converts unsigned integer into 32-bit IEEE floating point representation.
- * Conversion is not universal and only works for the range from 0
- * to 2^I2F_MAX_BITS-1. Currently we only use it with inputs between
- * 0 and 16384 (inclusive), so I2F_MAX_BITS=15 is enough. If necessary,
- * I2F_MAX_BITS can be increased, but that will add to the loop iterations
- * and slow us down. Conversion is done by shifting the input and counting
- * down until the first 1 reaches bit position 23. The resulting counter
- * and the shifted input are, respectively, the exponent and the fraction.
- * The sign is always zero.
- */
-static uint32_t i2f(uint32_t input)
-{
- u32 result, i, exponent, fraction;
-
- WARN_ON_ONCE(input > I2F_MAX_INPUT);
-
- if ((input & I2F_MAX_INPUT) == 0)
- result = 0;
- else {
- exponent = 126 + I2F_MAX_BITS;
- fraction = (input & I2F_MAX_INPUT) << I2F_SHIFT;
-
- for (i = 0; i < I2F_MAX_BITS; i++) {
- if (fraction & 0x800000)
- break;
- else {
- fraction = fraction << 1;
- exponent = exponent - 1;
- }
- }
- result = exponent << 23 | (fraction & 0x7fffff);
- }
- return result;
-}
-
int r600_blit_init(struct radeon_device *rdev)
{
u32 obj_size;
@@ -766,14 +726,14 @@
vb_cpu_addr[3] = 0;
vb_cpu_addr[4] = 0;
- vb_cpu_addr[5] = i2f(h);
+ vb_cpu_addr[5] = int2float(h);
vb_cpu_addr[6] = 0;
- vb_cpu_addr[7] = i2f(h);
+ vb_cpu_addr[7] = int2float(h);
- vb_cpu_addr[8] = i2f(w);
- vb_cpu_addr[9] = i2f(h);
- vb_cpu_addr[10] = i2f(w);
- vb_cpu_addr[11] = i2f(h);
+ vb_cpu_addr[8] = int2float(w);
+ vb_cpu_addr[9] = int2float(h);
+ vb_cpu_addr[10] = int2float(w);
+ vb_cpu_addr[11] = int2float(h);
rdev->r600_blit.primitives.set_tex_resource(rdev, FMT_8_8_8_8,
w, h, w, src_gpu_addr, size_in_bytes);