Samsung S5PC100, User Manual, Page: 1265 / 1863

3D-ACCELERATOR S5PC100 USER’S MANUAL (REV1.0)
9.6-38
4.3.2 Constant Float Register (VS_CFLOAT)
y
Constant Float Register of The Vertex Shader, R/W, Address = 0x0001_4000 ~ 0x0001_4FFF
The constant floating-point numbers can be stored in the constant float register for calculating in the program. The
constant float register has 256 entries. Each entry is composed of 4 channels, x, y, z, w as below. Each channel is
32-bit word and has IEEE single precision floating-point format. (De-normalized number is not supported.) Initial
value of this register is un-known because it is stored internal sram. User has to initialize this register before use
it.
4.3.3 Constant Float W Component Value (WORD 3, R/W, Address = 0X0001_4XXC, 00 <= XX <= FF)
WORD3 Bit Description Reset Value
W [127:96] Constant float W component value 0xXXXXXXXX
4.3.4 Constant Float Z Component Value (WORD 2, R/W, Address = 0X0001_4XX8, 00 <= XX <= FF)
WORD2 Bit Description Reset Value
Z [95:64] Constant float Z component value 0xXXXXXXXX
4.3.5 Constant Float Y Component Value (WORD 1, R/W, Address = 0X0001_4XX4, 00 <= XX <= FF)
WORD1 Bit Description Reset Value
Y [63:32] Constant float Y component value 0xXXXXXXXX
4.3.6 Constant Float X Component Value (WORD 0, R/W, Address = 0X0001_4XX0, 00 <= XX <= FF)
WORD0 Bit Description Reset Value
X [31:0] Constant float X component value 0xXXXXXXXX
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IEEE single precision floating-point format
Bit Description Reset Value
S [31] Sign bit XXXXXXh
E [30:23] Biased exponent XXh
F [22:0] Fraction