[Bug 27901] GLSL cos/sin functions broken on Mesa R600 driver

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=27901

--- Comment #18 from Andre Maasikas <amaasikas at gmail.com> 2010-06-08 05:53:36 PDT ---
dont' have much net this week to review/test:(
but i'm ok with it if you make last mul conditional on r700 as 
it has -1..1 range it seems, also amd shader analyzer gives this difference:

RV610 hd2400

; --------  Disassembly --------------------
00 ALU: ADDR(32) CNT(8)
      0  y: MULADD      R123.y,  R0.x,  (0x3E22F983, 0.1591549367f).x,
 0.5
         z: MOV         R0.z,  0.0f
         w: MOV         R0.w,  1.0f
      1  x: FRACT       ____,  PV0.y
      2  z: MULADD      R123.z,  PV1.x,  (0x40C90FDB, 6.283185482f).y,
-(0x40490FDB, 3.141592741f).x
      3  t: SIN         R0.x,  PV2.z
01 EXP_DONE: PIX0, R0.xzzw
END_OF_PROGRAM

4870 RV770
; --------  Disassembly --------------------
00 ALU: ADDR(32) CNT(10)
      0  y: MOV         R0.y,  0.0f
         z: MOV         R0.z,  1.0f
         w: MULADD      R123.w,  R0.x,  (0x3E22F983, 0.1591549367f).x,
 0.5
      1  y: FRACT       ____,  PV0.w
      2  x: MULADD      R123.x,  PV1.y,  (0x40C90FDB, 6.283185482f).y,
-(0x40490FDB, 3.141592741f).x
      3  z: MUL         ____,  PV2.x,  (0x3E22F983, 0.1591549367f).x
      4  t: SIN         R0.x,  PV3.z
01 EXP_DONE: PIX0, R0.xyyz
END_OF_PROGRAM

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