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rotate.vs.asm: change comment style

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This commit is contained in:
Zack Buhman 2025-10-23 19:54:16 -05:00
parent b671d30d3a
commit 8c95d09658
1 changed files with 17 additions and 18 deletions
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35
drm/rotate.vs.asm
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@ -1,18 +1,17 @@
# CONST[0] = {0.159155, 0.5, 6.283185, -3.141593}
# CONST[1] = {rotate, _, _, _}
-- CONST[0] = {0.159155, 0.5, 6.283185, -3.141593}
-- CONST[1] = {rotate, _, _, _}
# each instruction is only allowed to use a single unique `const` address
#
# instructions may use multiple `temp` addresses, so const[1] is moved to
# temp[0]:
#
-- each instruction is only allowed to use a single unique `const` address
--
-- instructions may use multiple `temp` addresses, so const[1] is moved to
-- temp[0]:
--
temp[0].x = VE_ADD const[1].x___ const[1].0___ ;
# ME_SIN and ME_COS are clamped to the range -π to +π prior to the sin/cos
# calculation.
#
# This 3-instruction sequence linearly remaps the range [-∞,+∞] to [-π,+π]
-- ME_SIN and ME_COS clamp their inputs to [-π,+π] prior to the sin/cos
-- calculation.
--
-- This 3-instruction sequence remaps the range [-∞,+∞] to [-π,+π]
temp[1].x = VE_MAD temp[0].x___ const[0].x___ const[0].y___ ;
temp[2].x = VE_FRC temp[1].x___ ;
temp[3].x = VE_MAD temp[2].x___ const[0].z___ const[0].w___ ;
@ -20,11 +19,11 @@ temp[3].x = VE_MAD temp[2].x___ const[0].z___ const[0].w___ ;
temp[4].x = ME_SIN temp[3].___x ;
temp[4].y = ME_COS temp[3].___x ;
# with sin and cos calculated, this now ordinary two-dimensional rotation:
#
# x = position.x * cost - position.y * sint
# y = position.x * sint + position.y * cost
# z = 0
# w = 1
-- with sin and cos calculated, this now ordinary two-dimensional rotation:
--
-- x = position.x * cost - position.y * sint
-- y = position.x * sint + position.y * cost
-- z = 0
-- w = 1
temp[5].xy = VE_MUL input[0].yy__ temp[4].xy__ ;
out[0].xyzw = VE_MAD input[0].xx01 temp[4].yx01 temp[5].-xy00 ;